makernexuswiki - User contributions [en]

3D printed face shields

2020-04-09T04:40:11Z

Hzeller: /* NOW */

[[File:Face shield front.jpg|200px]] [[File:Face shield side.jpg|350px]] [[File:Face shield top.jpg|350px]]

== Overview ==
Face shields are used by health care professionals to protect them when working with patients. Hospital supplies are running low. While they prefer to use commercially manufactured ones, in this emergency they are looking for alternative sources.

The headband portion of these shields is made on a 3D printer. If you have a 3D printer, you can make these. We have several at Maker Nexus that will be running as long as we have supplies. We deliver them to local hospitals.

* [https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform Sign up to use your own 3D printer] to help
* [https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform Sign up to receive face shields] for your health care facility

'''In the News'''

* A TV segment [https://sanfrancisco.cbslocal.com/video/4495791-maker-community-uses-3-d-printer-to-supply-ppe-to-health-professionals/ from KPIX]
* Watch a short [https://www.ktvu.com/news/covid-19-sunnyvale-company-designing-3d-protective-masks-to-meet-demand KTVU news report about our efforts.]

'''How much do they cost?'''

We give these away, paying for them from donations. We do not sell them. Promises of donations or actual donations do not affect who is prioritized to receive the PPE. The allocation team is not told who has donated. However, they cost us about $5 each to make. Donations are critical for us to be able to keep producing. We will make them until the money runs out.

[http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Is there really a need?'''

* We've heard from friends that "nurses are cutting up plastic soda bottles to make face shields, using saran wrap on top of N95 masks to allow for multi-use."
* One local nurse said they are making face shields from cut up shower curtains and hot glue guns.
* In reviewing the current design: "The nurses were over the moon about how easily the shields can be disassembled and sterilized."
* A nurse from Marin called us and I got her hooked into the allocation process and told her they were free. She started crying on the phone. - JimS

See [[Face Shield User Stories|stories from those who have received face shields from us]].

We are ramping up to make 1,000 a week, maybe more.

'''How do I get some?'''

If your health care facility needs face shields, fill in this form:

[https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform?usp=sf_link My Facility Needs Face Shields] (click the link)

A link to [[MN COVID Response|Other COVID Projects]]

== 3D Print Parts At Home ==

=== Use Your 3D Printer for good ===

'''Sign up'''

We are establishing a network of 3D printer owners who can make the headbands for us. You make them and deliver them to our facility where we do the assembly and get them to the hospitals. If you want to be part of our network, fill in this form and we will contact you:

[https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform I want to help make them]

=== What to do with the finished product ===
When you have parts ready to deliver, please follow the following steps:
# Fill out [https://docs.google.com/forms/d/e/1FAIpQLSdJfZz5M-xxQifJmFBdNQcn7c3i5eFabV7StA5ep9zsJuco9Q/viewform?usp=sf_link this form] with information about your donation (so we can track inventory)
# Seal in plastic bag.
# Label bag with your email, the version of face shield you printed (e.g. "MN 1.3" see releases in parts below; or "RC2" if you used that), the material printed with and the date you closed the bag.
# Mail to
Maker Nexus
234 E. Caribbean Drive
Sunnyvale, CA 94089
OR
Deliver to us if you are local and it does not violate the Shelter In Place Order - please do not make a special trip for this - but if you are passing by on your way to get essential groceries and want to drop it off, that is acceptable - there is a box outside our front door where donated parts can be placed.

Please be sure you are following proper sanitation procedures when you bag parts - if possible, wear gloves and a breathing mask, wipe or spray with disinfectant if available. We want to minimize the chance of cross-contamination. After it reaches MN, we will be further disinfecting them before delivering to its end destination.

We have some limited amount of 1.75mm PETg, ABS, and PLA that we can give you when you have dropped off 20 or more face shields parts. Supplies are very limited so please only take some if you need it. Just ring the door bell and ask if we have any filament in stock.

== 3D Print Directions ==

=== Materials ===

'''PETG filament Sources'''

These face shields are best done with PETG filament. A 1kg spool can make about 20 units.

* [http://matterhackers.com Matter Hackers]
** 3mm product id # MF3CF7NH 1kg about $25
** 1.75mm product id # M3MY2VQG 1kg about $24 (only $20 each if you buy 5)
** 1.75mm product id # MTVEPT25 10 pounds (4.5kg) about $185 It is a higher quality PETG filament, but is it really worth the extra cost?

'''PETG Sheet Sources'''

One 48x96 inch sheet can make about 24 shields.

* [http://www.piedmontplastics.com Piedmont Plastics] in San Leandro, CA. .020x48x96 CLR VIVAK PETG JFM about $16/sheet.

=== Instructions ===

'''Printer Settings'''

Print with '''PETG''' for ease of sanitation - IPA, Hydrogen Peroxide, Bleach, and Acetic Acid up to 10% can all be safely used with PETG.
If you don't have PETG, using '''ABS''' and '''PLA''' is also an approved option.

Print settings:
* Temperature based on filament selection.
* 3 perimeters
* 100% infill
* 0.3mm Draft settings in PrusaSlicer work fine
* we are running our Prusa's at 130% speed

=== Parts ===
==== NOW ====
We got the injection molded headbands started, so now we only need the bottom reinforcements of the shields. Lots of them: the injection molding process can generate thousands of headbands a day, so we need the same amount of bottom reinforcments - which we need to still 3D print. We need '''lots''' of them! So focus now is entirely going to be printing bottom reinforcments.

It is great as even small printers can be fully utilized!

On one built-plate of a Prusa, there fit 34 (might be a little bit more with more squeezing); it takes a little bit more than 8 hours, which is great for night-shifts, as there is no lost time. This also means that in optimal situations, we can get around 100 per day per printer.

GCode:
* [https://github.com/makernexus/prusa-covid19-shield-remix/raw/master/fab/bottoms-PETG-Prusa.gcode bottoms-PETG-Prusa.gcode] '''PETG''' for Prusa MK3s
* [https://github.com/makernexus/prusa-covid19-shield-remix/raw/master/fab/bottoms-PLA-Prusa.gcode bottoms-PLA-Prusa.gcode] '''PETG''' for Prusa MK3s
* [https://github.com/makernexus/prusa-covid19-shield-remix/raw/master/plate-full-of-bottom-supports.3mf plate-full-of-bottom-supports.3mf] '''3mf''' Project file for prusa-slicer
* [https://github.com/makernexus/prusa-covid19-shield-remix/raw/master/fab/bottom_reinforcement.stl bottom_reinfocement.stl] '''STL''' do manually fill your build-plate and slice.

[[File:prusa-bottom-part-plate.png]]

==== Historic ====

''Don't look at this section for printing anything, see above about current priorities. The headbands are now fabricated with injection molding, so we don't need to print them anymore, but we need lots of bottom reinforcements.''

Most important change in our headband design is that the pins are centered in the headband, so that there is something covering the shield punch, making a better seal. Also, the radii in the crevices are larger than the original to facilitate easier sanitation.

Latest release is v1.9 (2020-04-06)

This archive contains (next to the source files) the following files used used to print, which you also can download here:

* '''Ready-to-go GCode''': [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.9/fab/T9-PETG-Prusa.gcode T9-PETG-Prusa.gcode] (right click, download or ''save link as...'') for '''PETG''', [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.9/fab/T9-PLA-Prusa.gcode T9-PLA-Prusa.gcode] for '''PLA'''. This prints two headbands and two bottom stabilizers. Using print-speed of 130% on the Prusa seems to work fine. If you use '''ABS''', please use the files below to slice for your printer. These print with little 'D-shaped' supports in front of the pins, that should break off easily.
* '''3MF slicer project file''' [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.9/thin_shield.3mf thin_shield.3mf] for PETG and [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.9/thin_pla_shield.3mf thin_pla_shield.3mf] for PLA. This allows you to choose placement, temperatures, select which parts to print on the bed etc.
* '''slice yourself''' [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.9/fab/thin_shield_with_support.stl thin_shield_with_support.stl] (right click, download or ''save link as...'') for PETG, [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.9/fab/thin_pla_shield_with_support.stl thin_pla_shield_with_support.stl] for PLA. There is also a no-support stl version in case you want to add support for the front-pins yourself in your slicer. If you _do_ print with build-in supports, make sure to enable the ''''Detect Thin Walls'''' feature in your slicer.

Also please print one [https://github.com/makernexus/prusa-covid19-shield-remix/raw/master/fab/bottom_reinforcement.stl bottom_reinforcement.stl] per headband (sometimes it is more efficient to do that separately). If you slice the version with built-in support, make sure to have 'enable thin wall detection' in your slicer. The 3mf files already have that enabled.

If your printer can't fit a headband, you can still help and print the bottom parts, stabilizing the shield plastic: Print as many [https://github.com/makernexus/prusa-covid19-shield-remix/raw/master/baseline/bottom_reinforcement.stl bottom_reinforcement.stl] that you fit on your print-bed: we need them as many people with larger print-beds focus on the headbands itself right now.
Here is a [https://github.com/makernexus/prusa-covid19-shield-remix/raw/master/plate-full-of-bottom-supports.3mf plate-full-of-bottom-supports.3mf] file to load directly into a slicer. Sometimes it is
a good idea to use the night-time shift to print these.

More files, 3mf and STL you get directly on Github: https://github.com/makernexus/prusa-covid19-shield-remix#cut-to-the-chase-gcode-ready-to-use

== Laser Cut Parts ==

* [[:media:Wrapover-faceshield-laser.svg|The SVG file for laser cutting the shield part]] SVG File

The shields are cut from 0.020 inch thick PETG sheets. Our base design fits into sheets of 24"x32". If we get donations of larger sheets, then we cut it down before using it. We have successfully used 0.030, it is more expensive. 0.040 is too thick and will not snap onto the headband.

We tested laser cutting .015 PETG. Key takeaways: Works, but requires more cleaning. .020 is a clearly superior product, but .015 will work. The primary issue is that that lack of clear film on both surfaces results in smoke residue which can be wiped clean with typical cleaners. Mitigation - Alternative cutting process would alleviate the problem - CNC Drag knife of Vinyl Cutter may work. The thinner film results in a flexible shield more in line with disposable shield - this will likely result in fewer uses before being thrown away.

== Elastic Band ==

Each shield uses approximately 8 inches of button hole elastic, 3/4 inch wide.

Sources
* [https://www.homesew.com/ Home Sew]

== Assembly and Disassembly ==

'''Assembly'''

Assembly requires about 8" of 3/4 wide button hole elastic.

* A short video on [https://youtu.be/qKqDUExM4Q8 how to assemble the Maker Nexus face shield version RC2]

* The original design [https://www.prusaprinters.org/prints/25857-prusa-protective-face-shield-rc2 Prusa RC2 STL- On this page]

Each box of face shields contains a QR Code that links to [[Covid-19 Shield User Instructions]]

'''Disassembly for cleaning'''

These face shields can be taken apart for cleaning.

The sheets are made of PETG and can handle alcohol and UV. The head band and spreader could be made of PETG, ABS, or PLA. These all resist alcohol but are heat sensitive. We are not experts in how to sanitize equipment. You, as user, take responsibility for appropriate sanitization. See [https://help.prusa3d.com/en/article/prusa-face-shield-disinfection_125457#_ga=2.91675610.133084680.1585293016-139199844.1585293016 this page from Prusa Research] for information on sanitization methods currently being tested.

A short video on [https://www.youtube.com/watch?v=F7FFPzGeRME how to take the Maker Nexus face shield apart]

== Help at MN ==
At this time we do not need volunteers in the makerspace itself. The space is on lockdown so that we do not introduce the virus into our work area.

'''Donations Needed'''

* PETG filament is useful - if you aren't able to print yourself. Any color in both 1.75mm and 3mm diameter filament. It should be in a factory sealed box or in a bag with desiccant.
* 3/4"-1" button hole elastic
* 0.020" thick PETG film for disposable masks, sheets or rolls

You can drop-off the donations at Maker Nexus, just leave it in the box by the front door of Maker Nexus. Please use appropriate procedures when packaging - including wearing a new pair of gloves and a face mask if available.

You can also donate via PayPal towards COVID-19 efforts that Maker Nexus is working on. [http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Who to contact'''

MN members join the #covid-faceshield channel on [https://www.makernexus.com/member-dashboard Slack]

If you don't have access to Slack, please email [mailto:faceshields@makernexus.org faceshields@makernexus.org]

== External Links ==

=== Information & Discussions ===
- [https://join.slack.com/t/prusafaceshields/shared_invite/zt-cz809azp-f41jGEYZivRKWH6IcYEmKw External slack for Prusa Shield discussions]

== Status ==
As of 3/29/2020

* We have 15 3D printers at Maker Nexus and 205 printers at homes through out the community.

* We have enough 0.020/0.030 PETg sheets to make about 4000 more shields. This is hard to buy now and we are testing alternatives.

* We have enough filament to keep our printers running and are buying more. Our preferred filament is now on back order and we are sourcing directly from China.

* We are exploring injection molding for the head bands. This may take some time.

* We have shipped over 650 face shields. Yea! That is what it's all about.

3D printed face shields

2020-04-09T04:13:44Z

Hzeller: /* NOW */

[[File:Face shield front.jpg|200px]] [[File:Face shield side.jpg|350px]] [[File:Face shield top.jpg|350px]]

== Overview ==
Face shields are used by health care professionals to protect them when working with patients. Hospital supplies are running low. While they prefer to use commercially manufactured ones, in this emergency they are looking for alternative sources.

The headband portion of these shields is made on a 3D printer. If you have a 3D printer, you can make these. We have several at Maker Nexus that will be running as long as we have supplies. We deliver them to local hospitals.

* [https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform Sign up to use your own 3D printer] to help
* [https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform Sign up to receive face shields] for your health care facility

'''In the News'''

* A TV segment [https://sanfrancisco.cbslocal.com/video/4495791-maker-community-uses-3-d-printer-to-supply-ppe-to-health-professionals/ from KPIX]
* Watch a short [https://www.ktvu.com/news/covid-19-sunnyvale-company-designing-3d-protective-masks-to-meet-demand KTVU news report about our efforts.]

'''How much do they cost?'''

We give these away, paying for them from donations. We do not sell them. Promises of donations or actual donations do not affect who is prioritized to receive the PPE. The allocation team is not told who has donated. However, they cost us about $5 each to make. Donations are critical for us to be able to keep producing. We will make them until the money runs out.

[http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Is there really a need?'''

* We've heard from friends that "nurses are cutting up plastic soda bottles to make face shields, using saran wrap on top of N95 masks to allow for multi-use."
* One local nurse said they are making face shields from cut up shower curtains and hot glue guns.
* In reviewing the current design: "The nurses were over the moon about how easily the shields can be disassembled and sterilized."
* A nurse from Marin called us and I got her hooked into the allocation process and told her they were free. She started crying on the phone. - JimS

See [[Face Shield User Stories|stories from those who have received face shields from us]].

We are ramping up to make 1,000 a week, maybe more.

'''How do I get some?'''

If your health care facility needs face shields, fill in this form:

[https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform?usp=sf_link My Facility Needs Face Shields] (click the link)

A link to [[MN COVID Response|Other COVID Projects]]

== 3D Print Parts At Home ==

=== Use Your 3D Printer for good ===

'''Sign up'''

We are establishing a network of 3D printer owners who can make the headbands for us. You make them and deliver them to our facility where we do the assembly and get them to the hospitals. If you want to be part of our network, fill in this form and we will contact you:

[https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform I want to help make them]

=== What to do with the finished product ===
When you have parts ready to deliver, please follow the following steps:
# Fill out [https://docs.google.com/forms/d/e/1FAIpQLSdJfZz5M-xxQifJmFBdNQcn7c3i5eFabV7StA5ep9zsJuco9Q/viewform?usp=sf_link this form] with information about your donation (so we can track inventory)
# Seal in plastic bag.
# Label bag with your email, the version of face shield you printed (e.g. "MN 1.3" see releases in parts below; or "RC2" if you used that), the material printed with and the date you closed the bag.
# Mail to
Maker Nexus
234 E. Caribbean Drive
Sunnyvale, CA 94089
OR
Deliver to us if you are local and it does not violate the Shelter In Place Order - please do not make a special trip for this - but if you are passing by on your way to get essential groceries and want to drop it off, that is acceptable - there is a box outside our front door where donated parts can be placed.

Please be sure you are following proper sanitation procedures when you bag parts - if possible, wear gloves and a breathing mask, wipe or spray with disinfectant if available. We want to minimize the chance of cross-contamination. After it reaches MN, we will be further disinfecting them before delivering to its end destination.

We have some limited amount of 1.75mm PETg, ABS, and PLA that we can give you when you have dropped off 20 or more face shields parts. Supplies are very limited so please only take some if you need it. Just ring the door bell and ask if we have any filament in stock.

== 3D Print Directions ==

=== Materials ===

'''PETG filament Sources'''

These face shields are best done with PETG filament. A 1kg spool can make about 20 units.

* [http://matterhackers.com Matter Hackers]
** 3mm product id # MF3CF7NH 1kg about $25
** 1.75mm product id # M3MY2VQG 1kg about $24 (only $20 each if you buy 5)
** 1.75mm product id # MTVEPT25 10 pounds (4.5kg) about $185 It is a higher quality PETG filament, but is it really worth the extra cost?

'''PETG Sheet Sources'''

One 48x96 inch sheet can make about 24 shields.

* [http://www.piedmontplastics.com Piedmont Plastics] in San Leandro, CA. .020x48x96 CLR VIVAK PETG JFM about $16/sheet.

=== Instructions ===

'''Printer Settings'''

Print with '''PETG''' for ease of sanitation - IPA, Hydrogen Peroxide, Bleach, and Acetic Acid up to 10% can all be safely used with PETG.
If you don't have PETG, using '''ABS''' and '''PLA''' is also an approved option.

Print settings:
* Temperature based on filament selection.
* 3 perimeters
* 100% infill
* 0.3mm Draft settings in PrusaSlicer work fine
* we are running our Prusa's at 130% speed

=== Parts ===
==== NOW ====
We got the injection molded headbands started, so now we only need the bottom reinforcements of the shields. Lots of them: the injection molding process can generate thousands of headbands a day, so we need the same amount of bottom reinforcments - which we need to still 3D print. We need '''lots''' of them! So focus now is entirely going to be printing bottom reinforcments.

It is great as even small printers can be fully utilized!

One one built-plate of a Prusa, there fit 34 (might be a little bit more with more squeezing); it takes a little bit more than 8 hours, which is great for night-shifts, as there is no lost time. This also means that in optimal situations, we can get around 100 per day per printer.

GCode:
* [https://github.com/makernexus/prusa-covid19-shield-remix/raw/master/fab/bottoms-PETG-Prusa.gcode bottoms-PETG-Prusa.gcode] '''PETG''' for Prusa MK3s
* [https://github.com/makernexus/prusa-covid19-shield-remix/raw/master/fab/bottoms-PLA-Prusa.gcode bottoms-PLA-Prusa.gcode] '''PETG''' for Prusa MK3s
* [https://github.com/makernexus/prusa-covid19-shield-remix/raw/master/plate-full-of-bottom-supports.3mf plate-full-of-bottom-supports.3mf] '''3mf''' Project file for prusa-slicer
* [https://github.com/makernexus/prusa-covid19-shield-remix/raw/master/fab/bottom_reinforcement.stl bottom_reinfocement.stl] '''STL''' do manually fill your build-plate and slice.

[[File:prusa-bottom-part-plate.png]]

==== Historic ====

''Don't look at this section for printing anything, see above about current priorities. The headbands are now fabricated with injection molding, so we don't need to print them anymore, but we need lots of bottom reinforcements.''

Most important change in our headband design is that the pins are centered in the headband, so that there is something covering the shield punch, making a better seal. Also, the radii in the crevices are larger than the original to facilitate easier sanitation.

Latest release is v1.9 (2020-04-06)

This archive contains (next to the source files) the following files used used to print, which you also can download here:

* '''Ready-to-go GCode''': [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.9/fab/T9-PETG-Prusa.gcode T9-PETG-Prusa.gcode] (right click, download or ''save link as...'') for '''PETG''', [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.9/fab/T9-PLA-Prusa.gcode T9-PLA-Prusa.gcode] for '''PLA'''. This prints two headbands and two bottom stabilizers. Using print-speed of 130% on the Prusa seems to work fine. If you use '''ABS''', please use the files below to slice for your printer. These print with little 'D-shaped' supports in front of the pins, that should break off easily.
* '''3MF slicer project file''' [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.9/thin_shield.3mf thin_shield.3mf] for PETG and [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.9/thin_pla_shield.3mf thin_pla_shield.3mf] for PLA. This allows you to choose placement, temperatures, select which parts to print on the bed etc.
* '''slice yourself''' [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.9/fab/thin_shield_with_support.stl thin_shield_with_support.stl] (right click, download or ''save link as...'') for PETG, [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.9/fab/thin_pla_shield_with_support.stl thin_pla_shield_with_support.stl] for PLA. There is also a no-support stl version in case you want to add support for the front-pins yourself in your slicer. If you _do_ print with build-in supports, make sure to enable the ''''Detect Thin Walls'''' feature in your slicer.

Also please print one [https://github.com/makernexus/prusa-covid19-shield-remix/raw/master/fab/bottom_reinforcement.stl bottom_reinforcement.stl] per headband (sometimes it is more efficient to do that separately). If you slice the version with built-in support, make sure to have 'enable thin wall detection' in your slicer. The 3mf files already have that enabled.

If your printer can't fit a headband, you can still help and print the bottom parts, stabilizing the shield plastic: Print as many [https://github.com/makernexus/prusa-covid19-shield-remix/raw/master/baseline/bottom_reinforcement.stl bottom_reinforcement.stl] that you fit on your print-bed: we need them as many people with larger print-beds focus on the headbands itself right now.
Here is a [https://github.com/makernexus/prusa-covid19-shield-remix/raw/master/plate-full-of-bottom-supports.3mf plate-full-of-bottom-supports.3mf] file to load directly into a slicer. Sometimes it is
a good idea to use the night-time shift to print these.

More files, 3mf and STL you get directly on Github: https://github.com/makernexus/prusa-covid19-shield-remix#cut-to-the-chase-gcode-ready-to-use

== Laser Cut Parts ==

* [[:media:Wrapover-faceshield-laser.svg|The SVG file for laser cutting the shield part]] SVG File

The shields are cut from 0.020 inch thick PETG sheets. Our base design fits into sheets of 24"x32". If we get donations of larger sheets, then we cut it down before using it. We have successfully used 0.030, it is more expensive. 0.040 is too thick and will not snap onto the headband.

We tested laser cutting .015 PETG. Key takeaways: Works, but requires more cleaning. .020 is a clearly superior product, but .015 will work. The primary issue is that that lack of clear film on both surfaces results in smoke residue which can be wiped clean with typical cleaners. Mitigation - Alternative cutting process would alleviate the problem - CNC Drag knife of Vinyl Cutter may work. The thinner film results in a flexible shield more in line with disposable shield - this will likely result in fewer uses before being thrown away.

== Elastic Band ==

Each shield uses approximately 8 inches of button hole elastic, 3/4 inch wide.

Sources
* [https://www.homesew.com/ Home Sew]

== Assembly and Disassembly ==

'''Assembly'''

Assembly requires about 8" of 3/4 wide button hole elastic.

* A short video on [https://youtu.be/qKqDUExM4Q8 how to assemble the Maker Nexus face shield version RC2]

* The original design [https://www.prusaprinters.org/prints/25857-prusa-protective-face-shield-rc2 Prusa RC2 STL- On this page]

Each box of face shields contains a QR Code that links to [[Covid-19 Shield User Instructions]]

'''Disassembly for cleaning'''

These face shields can be taken apart for cleaning.

The sheets are made of PETG and can handle alcohol and UV. The head band and spreader could be made of PETG, ABS, or PLA. These all resist alcohol but are heat sensitive. We are not experts in how to sanitize equipment. You, as user, take responsibility for appropriate sanitization. See [https://help.prusa3d.com/en/article/prusa-face-shield-disinfection_125457#_ga=2.91675610.133084680.1585293016-139199844.1585293016 this page from Prusa Research] for information on sanitization methods currently being tested.

A short video on [https://www.youtube.com/watch?v=F7FFPzGeRME how to take the Maker Nexus face shield apart]

== Help at MN ==
At this time we do not need volunteers in the makerspace itself. The space is on lockdown so that we do not introduce the virus into our work area.

'''Donations Needed'''

* PETG filament is useful - if you aren't able to print yourself. Any color in both 1.75mm and 3mm diameter filament. It should be in a factory sealed box or in a bag with desiccant.
* 3/4"-1" button hole elastic
* 0.020" thick PETG film for disposable masks, sheets or rolls

You can drop-off the donations at Maker Nexus, just leave it in the box by the front door of Maker Nexus. Please use appropriate procedures when packaging - including wearing a new pair of gloves and a face mask if available.

You can also donate via PayPal towards COVID-19 efforts that Maker Nexus is working on. [http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Who to contact'''

MN members join the #covid-faceshield channel on [https://www.makernexus.com/member-dashboard Slack]

If you don't have access to Slack, please email [mailto:faceshields@makernexus.org faceshields@makernexus.org]

== External Links ==

=== Information & Discussions ===
- [https://join.slack.com/t/prusafaceshields/shared_invite/zt-cz809azp-f41jGEYZivRKWH6IcYEmKw External slack for Prusa Shield discussions]

== Status ==
As of 3/29/2020

* We have 15 3D printers at Maker Nexus and 205 printers at homes through out the community.

* We have enough 0.020/0.030 PETg sheets to make about 4000 more shields. This is hard to buy now and we are testing alternatives.

* We have enough filament to keep our printers running and are buying more. Our preferred filament is now on back order and we are sourcing directly from China.

* We are exploring injection molding for the head bands. This may take some time.

* We have shipped over 650 face shields. Yea! That is what it's all about.

File:Prusa-bottom-part-plate.png

2020-04-09T04:13:28Z

Hzeller: Build plate full of bottom parts.

Build plate full of bottom parts.

3D printed face shields

2020-04-09T04:03:48Z

Hzeller: Emphasize bottom parts.

[[File:Face shield front.jpg|200px]] [[File:Face shield side.jpg|350px]] [[File:Face shield top.jpg|350px]]

== Overview ==
Face shields are used by health care professionals to protect them when working with patients. Hospital supplies are running low. While they prefer to use commercially manufactured ones, in this emergency they are looking for alternative sources.

The headband portion of these shields is made on a 3D printer. If you have a 3D printer, you can make these. We have several at Maker Nexus that will be running as long as we have supplies. We deliver them to local hospitals.

* [https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform Sign up to use your own 3D printer] to help
* [https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform Sign up to receive face shields] for your health care facility

'''In the News'''

* A TV segment [https://sanfrancisco.cbslocal.com/video/4495791-maker-community-uses-3-d-printer-to-supply-ppe-to-health-professionals/ from KPIX]
* Watch a short [https://www.ktvu.com/news/covid-19-sunnyvale-company-designing-3d-protective-masks-to-meet-demand KTVU news report about our efforts.]

'''How much do they cost?'''

We give these away, paying for them from donations. We do not sell them. Promises of donations or actual donations do not affect who is prioritized to receive the PPE. The allocation team is not told who has donated. However, they cost us about $5 each to make. Donations are critical for us to be able to keep producing. We will make them until the money runs out.

[http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Is there really a need?'''

* We've heard from friends that "nurses are cutting up plastic soda bottles to make face shields, using saran wrap on top of N95 masks to allow for multi-use."
* One local nurse said they are making face shields from cut up shower curtains and hot glue guns.
* In reviewing the current design: "The nurses were over the moon about how easily the shields can be disassembled and sterilized."
* A nurse from Marin called us and I got her hooked into the allocation process and told her they were free. She started crying on the phone. - JimS

See [[Face Shield User Stories|stories from those who have received face shields from us]].

We are ramping up to make 1,000 a week, maybe more.

'''How do I get some?'''

If your health care facility needs face shields, fill in this form:

[https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform?usp=sf_link My Facility Needs Face Shields] (click the link)

A link to [[MN COVID Response|Other COVID Projects]]

== 3D Print Parts At Home ==

=== Use Your 3D Printer for good ===

'''Sign up'''

We are establishing a network of 3D printer owners who can make the headbands for us. You make them and deliver them to our facility where we do the assembly and get them to the hospitals. If you want to be part of our network, fill in this form and we will contact you:

[https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform I want to help make them]

=== What to do with the finished product ===
When you have parts ready to deliver, please follow the following steps:
# Fill out [https://docs.google.com/forms/d/e/1FAIpQLSdJfZz5M-xxQifJmFBdNQcn7c3i5eFabV7StA5ep9zsJuco9Q/viewform?usp=sf_link this form] with information about your donation (so we can track inventory)
# Seal in plastic bag.
# Label bag with your email, the version of face shield you printed (e.g. "MN 1.3" see releases in parts below; or "RC2" if you used that), the material printed with and the date you closed the bag.
# Mail to
Maker Nexus
234 E. Caribbean Drive
Sunnyvale, CA 94089
OR
Deliver to us if you are local and it does not violate the Shelter In Place Order - please do not make a special trip for this - but if you are passing by on your way to get essential groceries and want to drop it off, that is acceptable - there is a box outside our front door where donated parts can be placed.

Please be sure you are following proper sanitation procedures when you bag parts - if possible, wear gloves and a breathing mask, wipe or spray with disinfectant if available. We want to minimize the chance of cross-contamination. After it reaches MN, we will be further disinfecting them before delivering to its end destination.

We have some limited amount of 1.75mm PETg, ABS, and PLA that we can give you when you have dropped off 20 or more face shields parts. Supplies are very limited so please only take some if you need it. Just ring the door bell and ask if we have any filament in stock.

== 3D Print Directions ==

=== Materials ===

'''PETG filament Sources'''

These face shields are best done with PETG filament. A 1kg spool can make about 20 units.

* [http://matterhackers.com Matter Hackers]
** 3mm product id # MF3CF7NH 1kg about $25
** 1.75mm product id # M3MY2VQG 1kg about $24 (only $20 each if you buy 5)
** 1.75mm product id # MTVEPT25 10 pounds (4.5kg) about $185 It is a higher quality PETG filament, but is it really worth the extra cost?

'''PETG Sheet Sources'''

One 48x96 inch sheet can make about 24 shields.

* [http://www.piedmontplastics.com Piedmont Plastics] in San Leandro, CA. .020x48x96 CLR VIVAK PETG JFM about $16/sheet.

=== Instructions ===

'''Printer Settings'''

Print with '''PETG''' for ease of sanitation - IPA, Hydrogen Peroxide, Bleach, and Acetic Acid up to 10% can all be safely used with PETG.
If you don't have PETG, using '''ABS''' and '''PLA''' is also an approved option.

Print settings:
* Temperature based on filament selection.
* 3 perimeters
* 100% infill
* 0.3mm Draft settings in PrusaSlicer work fine
* we are running our Prusa's at 130% speed

=== Parts ===
==== NOW ====
We got the injection molded headbands started, so now we only need the bottom reinforcements of the shields. Lots of them: the injection molding process can generate thousands of headbands a day, so we need the same amount of bottom reinforcments - which we need to still 3D print. We need '''lots''' of them! So focus now is entirely going to be printing bottom reinforcments.

It is great as even small printers can be fully utilized!

One one built-plate of a Prusa, there fit 34 (might be a little bit more with more squeezing); it takes a little bit more than 8 hours, which is great for night-shifts, as there is no lost time. This also means that in optimal situations, we can get around 100 per day per printer.

GCode:
* [https://github.com/makernexus/prusa-covid19-shield-remix/raw/master/fab/bottoms-PETG-Prusa.gcode bottoms-PETG-Prusa.gcode] '''PETG''' for Prusa MK3s
* [https://github.com/makernexus/prusa-covid19-shield-remix/raw/master/fab/bottoms-PLA-Prusa.gcode bottoms-PLA-Prusa.gcode] '''PETG''' for Prusa MK3s
* [https://github.com/makernexus/prusa-covid19-shield-remix/raw/master/plate-full-of-bottom-supports.3mf plate-full-of-bottom-supports.3mf] '''3mf''' Project file for prusa-slicer
* [https://github.com/makernexus/prusa-covid19-shield-remix/raw/master/fab/bottom_reinforcement.stl bottom_reinfocement.stl] '''STL''' do manually fill your build-plate and slice.

==== Historic ====

''Don't look at this section for printing anything, see above about current priorities. The headbands are now fabricated with injection molding, so we don't need to print them anymore, but we need lots of bottom reinforcements.''

Most important change in our headband design is that the pins are centered in the headband, so that there is something covering the shield punch, making a better seal. Also, the radii in the crevices are larger than the original to facilitate easier sanitation.

Latest release is v1.9 (2020-04-06)

This archive contains (next to the source files) the following files used used to print, which you also can download here:

* '''Ready-to-go GCode''': [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.9/fab/T9-PETG-Prusa.gcode T9-PETG-Prusa.gcode] (right click, download or ''save link as...'') for '''PETG''', [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.9/fab/T9-PLA-Prusa.gcode T9-PLA-Prusa.gcode] for '''PLA'''. This prints two headbands and two bottom stabilizers. Using print-speed of 130% on the Prusa seems to work fine. If you use '''ABS''', please use the files below to slice for your printer. These print with little 'D-shaped' supports in front of the pins, that should break off easily.
* '''3MF slicer project file''' [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.9/thin_shield.3mf thin_shield.3mf] for PETG and [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.9/thin_pla_shield.3mf thin_pla_shield.3mf] for PLA. This allows you to choose placement, temperatures, select which parts to print on the bed etc.
* '''slice yourself''' [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.9/fab/thin_shield_with_support.stl thin_shield_with_support.stl] (right click, download or ''save link as...'') for PETG, [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.9/fab/thin_pla_shield_with_support.stl thin_pla_shield_with_support.stl] for PLA. There is also a no-support stl version in case you want to add support for the front-pins yourself in your slicer. If you _do_ print with build-in supports, make sure to enable the ''''Detect Thin Walls'''' feature in your slicer.

Also please print one [https://github.com/makernexus/prusa-covid19-shield-remix/raw/master/fab/bottom_reinforcement.stl bottom_reinforcement.stl] per headband (sometimes it is more efficient to do that separately). If you slice the version with built-in support, make sure to have 'enable thin wall detection' in your slicer. The 3mf files already have that enabled.

If your printer can't fit a headband, you can still help and print the bottom parts, stabilizing the shield plastic: Print as many [https://github.com/makernexus/prusa-covid19-shield-remix/raw/master/baseline/bottom_reinforcement.stl bottom_reinforcement.stl] that you fit on your print-bed: we need them as many people with larger print-beds focus on the headbands itself right now.
Here is a [https://github.com/makernexus/prusa-covid19-shield-remix/raw/master/plate-full-of-bottom-supports.3mf plate-full-of-bottom-supports.3mf] file to load directly into a slicer. Sometimes it is
a good idea to use the night-time shift to print these.

More files, 3mf and STL you get directly on Github: https://github.com/makernexus/prusa-covid19-shield-remix#cut-to-the-chase-gcode-ready-to-use

== Laser Cut Parts ==

* [[:media:Wrapover-faceshield-laser.svg|The SVG file for laser cutting the shield part]] SVG File

The shields are cut from 0.020 inch thick PETG sheets. Our base design fits into sheets of 24"x32". If we get donations of larger sheets, then we cut it down before using it. We have successfully used 0.030, it is more expensive. 0.040 is too thick and will not snap onto the headband.

We tested laser cutting .015 PETG. Key takeaways: Works, but requires more cleaning. .020 is a clearly superior product, but .015 will work. The primary issue is that that lack of clear film on both surfaces results in smoke residue which can be wiped clean with typical cleaners. Mitigation - Alternative cutting process would alleviate the problem - CNC Drag knife of Vinyl Cutter may work. The thinner film results in a flexible shield more in line with disposable shield - this will likely result in fewer uses before being thrown away.

== Elastic Band ==

Each shield uses approximately 8 inches of button hole elastic, 3/4 inch wide.

Sources
* [https://www.homesew.com/ Home Sew]

== Assembly and Disassembly ==

'''Assembly'''

Assembly requires about 8" of 3/4 wide button hole elastic.

* A short video on [https://youtu.be/qKqDUExM4Q8 how to assemble the Maker Nexus face shield version RC2]

* The original design [https://www.prusaprinters.org/prints/25857-prusa-protective-face-shield-rc2 Prusa RC2 STL- On this page]

Each box of face shields contains a QR Code that links to [[Covid-19 Shield User Instructions]]

'''Disassembly for cleaning'''

These face shields can be taken apart for cleaning.

The sheets are made of PETG and can handle alcohol and UV. The head band and spreader could be made of PETG, ABS, or PLA. These all resist alcohol but are heat sensitive. We are not experts in how to sanitize equipment. You, as user, take responsibility for appropriate sanitization. See [https://help.prusa3d.com/en/article/prusa-face-shield-disinfection_125457#_ga=2.91675610.133084680.1585293016-139199844.1585293016 this page from Prusa Research] for information on sanitization methods currently being tested.

A short video on [https://www.youtube.com/watch?v=F7FFPzGeRME how to take the Maker Nexus face shield apart]

== Help at MN ==
At this time we do not need volunteers in the makerspace itself. The space is on lockdown so that we do not introduce the virus into our work area.

'''Donations Needed'''

* PETG filament is useful - if you aren't able to print yourself. Any color in both 1.75mm and 3mm diameter filament. It should be in a factory sealed box or in a bag with desiccant.
* 3/4"-1" button hole elastic
* 0.020" thick PETG film for disposable masks, sheets or rolls

You can drop-off the donations at Maker Nexus, just leave it in the box by the front door of Maker Nexus. Please use appropriate procedures when packaging - including wearing a new pair of gloves and a face mask if available.

You can also donate via PayPal towards COVID-19 efforts that Maker Nexus is working on. [http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Who to contact'''

MN members join the #covid-faceshield channel on [https://www.makernexus.com/member-dashboard Slack]

If you don't have access to Slack, please email [mailto:faceshields@makernexus.org faceshields@makernexus.org]

== External Links ==

=== Information & Discussions ===
- [https://join.slack.com/t/prusafaceshields/shared_invite/zt-cz809azp-f41jGEYZivRKWH6IcYEmKw External slack for Prusa Shield discussions]

== Status ==
As of 3/29/2020

* We have 15 3D printers at Maker Nexus and 205 printers at homes through out the community.

* We have enough 0.020/0.030 PETg sheets to make about 4000 more shields. This is hard to buy now and we are testing alternatives.

* We have enough filament to keep our printers running and are buying more. Our preferred filament is now on back order and we are sourcing directly from China.

* We are exploring injection molding for the head bands. This may take some time.

* We have shipped over 650 face shields. Yea! That is what it's all about.

3D printed face shields

2020-04-07T20:29:36Z

Hzeller: add link to plate of bottom-supports.

[[File:Face shield front.jpg|200px]] [[File:Face shield side.jpg|350px]] [[File:Face shield top.jpg|350px]]

== Overview ==
Face shields are used by health care professionals to protect them when working with patients. Hospital supplies are running low. While they prefer to use commercially manufactured ones, in this emergency they are looking for alternative sources.

The headband portion of these shields is made on a 3D printer. If you have a 3D printer, you can make these. We have several at Maker Nexus that will be running as long as we have supplies. We deliver them to local hospitals.

* [https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform Sign up to use your own 3D printer] to help
* [https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform Sign up to receive face shields] for your health care facility

'''In the News'''

* A TV segment [https://sanfrancisco.cbslocal.com/video/4495791-maker-community-uses-3-d-printer-to-supply-ppe-to-health-professionals/ from KPIX]
* Watch a short [https://www.ktvu.com/news/covid-19-sunnyvale-company-designing-3d-protective-masks-to-meet-demand KTVU news report about our efforts.]

'''How much do they cost?'''

We give these away, paying for them from donations. We do not sell them. Promises of donations or actual donations do not affect who is prioritized to receive the PPE. The allocation team is not told who has donated. However, they cost us about $5 each to make. Donations are critical for us to be able to keep producing. We will make them until the money runs out.

[http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Is there really a need?'''

* We've heard from friends that "nurses are cutting up plastic soda bottles to make face shields, using saran wrap on top of N95 masks to allow for multi-use."
* One local nurse said they are making face shields from cut up shower curtains and hot glue guns.
* In reviewing the current design: "The nurses were over the moon about how easily the shields can be disassembled and sterilized."
* A nurse from Marin called us and I got her hooked into the allocation process and told her they were free. She started crying on the phone. - JimS

See [[Face Shield User Stories|stories from those who have received face shields from us]].

We are ramping up to make 1,000 a week, maybe more.

'''How do I get some?'''

If your health care facility needs face shields, fill in this form:

[https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform?usp=sf_link My Facility Needs Face Shields] (click the link)

A link to [[MN COVID Response|Other COVID Projects]]

== 3D Print Parts At Home ==

=== Use Your 3D Printer for good ===

'''Sign up'''

We are establishing a network of 3D printer owners who can make the headbands for us. You make them and deliver them to our facility where we do the assembly and get them to the hospitals. If you want to be part of our network, fill in this form and we will contact you:

[https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform I want to help make them]

=== What to do with the finished product ===
When you have parts ready to deliver, please follow the following steps:
# Fill out [https://docs.google.com/forms/d/e/1FAIpQLSdJfZz5M-xxQifJmFBdNQcn7c3i5eFabV7StA5ep9zsJuco9Q/viewform?usp=sf_link this form] with information about your donation (so we can track inventory)
# Seal in plastic bag.
# Label bag with your email, the version of face shield you printed (e.g. "MN 1.3" see releases in parts below; or "RC2" if you used that), the material printed with and the date you closed the bag.
# Mail to
Maker Nexus
234 E. Caribbean Drive
Sunnyvale, CA 94089
OR
Deliver to us if you are local and it does not violate the Shelter In Place Order - please do not make a special trip for this - but if you are passing by on your way to get essential groceries and want to drop it off, that is acceptable - there is a box outside our front door where donated parts can be placed.

Please be sure you are following proper sanitation procedures when you bag parts - if possible, wear gloves and a breathing mask, wipe or spray with disinfectant if available. We want to minimize the chance of cross-contamination. After it reaches MN, we will be further disinfecting them before delivering to its end destination.

We have some limited amount of 1.75mm PETg, ABS, and PLA that we can give you when you have dropped off 20 or more face shields parts. Supplies are very limited so please only take some if you need it. Just ring the door bell and ask if we have any filament in stock.

== 3D Print Directions ==

=== Materials ===

'''PETG filament Sources'''

These face shields are best done with PETG filament. A 1kg spool can make about 20 units.

* [http://matterhackers.com Matter Hackers]
** 3mm product id # MF3CF7NH 1kg about $25
** 1.75mm product id # M3MY2VQG 1kg about $24 (only $20 each if you buy 5)
** 1.75mm product id # MTVEPT25 10 pounds (4.5kg) about $185 It is a higher quality PETG filament, but is it really worth the extra cost?

'''PETG Sheet Sources'''

One 48x96 inch sheet can make about 24 shields.

* [http://www.piedmontplastics.com Piedmont Plastics] in San Leandro, CA. .020x48x96 CLR VIVAK PETG JFM about $16/sheet.

=== Instructions ===

'''Printer Settings'''

Print with '''PETG''' for ease of sanitation - IPA, Hydrogen Peroxide, Bleach, and Acetic Acid up to 10% can all be safely used with PETG.
If you don't have PETG, using '''ABS''' and '''PLA''' is also an approved option.

Print settings:
* Temperature based on filament selection.
* 3 perimeters
* 100% infill
* 0.3mm Draft settings in PrusaSlicer work fine
* we are running our Prusa's at 130% speed

=== Parts ===
We are focusing production based on the RC3 headband with with some MakerNexus modifications. If your printer cannot accommodate that on its bed, consider printing the bottom reinforcement parts.

Most important change is that the pins are centered in the headband, so that there is something covering the shield punch, making a better seal. Also, the radii in the crevices are larger than the original to facilitate easier sanitation.

Latest release is v1.9 (2020-04-06)

The print-output will have a version number based on the github revision on it imprinted so that it is easy to see just looking at a print. Current temple imprint looks like this

https://raw.githubusercontent.com/makernexus/prusa-covid19-shield-remix/v1.9/img/version-img.png

This archive contains (next to the source files) the following files used used to print, which you also can download here:

* '''Ready-to-go GCode''': [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.9/fab/T9-PETG-Prusa.gcode T9-PETG-Prusa.gcode] (right click, download or ''save link as...'') for '''PETG''', [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.9/fab/T9-PLA-Prusa.gcode T9-PLA-Prusa.gcode] for '''PLA'''. This prints two headbands and two bottom stabilizers. Using print-speed of 130% on the Prusa seems to work fine. If you use '''ABS''', please use the files below to slice for your printer. These print with little 'D-shaped' supports in front of the pins, that should break off easily.
* '''3MF slicer project file''' [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.9/thin_shield.3mf thin_shield.3mf] for PETG and [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.9/thin_pla_shield.3mf thin_pla_shield.3mf] for PLA. This allows you to choose placement, temperatures, select which parts to print on the bed etc.
* '''slice yourself''' [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.9/fab/thin_shield_with_support.stl thin_shield_with_support.stl] (right click, download or ''save link as...'') for PETG, [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.9/fab/thin_pla_shield_with_support.stl thin_pla_shield_with_support.stl] for PLA. There is also a no-support stl version in case you want to add support for the front-pins yourself in your slicer. If you _do_ print with build-in supports, make sure to enable the ''''Detect Thin Walls'''' feature in your slicer.

Also please print one [https://github.com/makernexus/prusa-covid19-shield-remix/raw/master/fab/bottom_reinforcement.stl bottom_reinforcement.stl] per headband (sometimes it is more efficient to do that separately). If you slice the version with built-in support, make sure to have 'enable thin wall detection' in your slicer. The 3mf files already have that enabled.

If your printer can't fit a headband, you can still help and print the bottom parts, stabilizing the shield plastic: Print as many [https://github.com/makernexus/prusa-covid19-shield-remix/raw/master/baseline/bottom_reinforcement.stl bottom_reinforcement.stl] that you fit on your print-bed: we need them as many people with larger print-beds focus on the headbands itself right now.
Here is a [https://github.com/makernexus/prusa-covid19-shield-remix/raw/master/plate-full-of-bottom-supports.3mf plate-full-of-bottom-supports.3mf] file to load directly into a slicer. Sometimes it is
a good idea to use the night-time shift to print these.

[[File:covid-headband-build-plate.png]]

More files, 3mf and STL you get directly on Github: https://github.com/makernexus/prusa-covid19-shield-remix#cut-to-the-chase-gcode-ready-to-use

== Laser Cut Parts ==

* [[:media:Wrapover-faceshield-laser.svg|The SVG file for laser cutting the shield part]] SVG File

The shields are cut from 0.020 inch thick PETG sheets. Our base design fits into sheets of 24"x32". If we get donations of larger sheets, then we cut it down before using it. We have successfully used 0.030, it is more expensive. 0.040 is too thick and will not snap onto the headband.

We tested laser cutting .015 PETG. Key takeaways: Works, but requires more cleaning. .020 is a clearly superior product, but .015 will work. The primary issue is that that lack of clear film on both surfaces results in smoke residue which can be wiped clean with typical cleaners. Mitigation - Alternative cutting process would alleviate the problem - CNC Drag knife of Vinyl Cutter may work. The thinner film results in a flexible shield more in line with disposable shield - this will likely result in fewer uses before being thrown away.

== Elastic Band ==

Each shield uses approximately 8 inches of button hole elastic, 3/4 inch wide.

Sources
* [https://www.homesew.com/ Home Sew]

== Assembly and Disassembly ==

'''Assembly'''

Assembly requires about 8" of 3/4 wide button hole elastic.

* A short video on [https://youtu.be/qKqDUExM4Q8 how to assemble the Maker Nexus face shield version RC2]

* The original design [https://www.prusaprinters.org/prints/25857-prusa-protective-face-shield-rc2 Prusa RC2 STL- On this page]

Each box of face shields contains a QR Code that links to [[Covid-19 Shield User Instructions]]

'''Disassembly for cleaning'''

These face shields can be taken apart for cleaning.

The sheets are made of PETG and can handle alcohol and UV. The head band and spreader could be made of PETG, ABS, or PLA. These all resist alcohol but are heat sensitive. We are not experts in how to sanitize equipment. You, as user, take responsibility for appropriate sanitization. See [https://help.prusa3d.com/en/article/prusa-face-shield-disinfection_125457#_ga=2.91675610.133084680.1585293016-139199844.1585293016 this page from Prusa Research] for information on sanitization methods currently being tested.

A short video on [https://www.youtube.com/watch?v=F7FFPzGeRME how to take the Maker Nexus face shield apart]

== Help at MN ==
At this time we do not need volunteers in the makerspace itself. The space is on lockdown so that we do not introduce the virus into our work area.

'''Donations Needed'''

* PETG filament is useful - if you aren't able to print yourself. Any color in both 1.75mm and 3mm diameter filament. It should be in a factory sealed box or in a bag with desiccant.
* 3/4"-1" button hole elastic
* 0.020" thick PETG film for disposable masks, sheets or rolls

You can drop-off the donations at Maker Nexus, just leave it in the box by the front door of Maker Nexus. Please use appropriate procedures when packaging - including wearing a new pair of gloves and a face mask if available.

You can also donate via PayPal towards COVID-19 efforts that Maker Nexus is working on. [http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Who to contact'''

MN members join the #covid-faceshield channel on [https://www.makernexus.com/member-dashboard Slack]

If you don't have access to Slack, please email [mailto:faceshields@makernexus.org faceshields@makernexus.org]

== External Links ==

=== Information & Discussions ===
- [https://join.slack.com/t/prusafaceshields/shared_invite/zt-cz809azp-f41jGEYZivRKWH6IcYEmKw External slack for Prusa Shield discussions]

== Status ==
As of 3/29/2020

* We have 15 3D printers at Maker Nexus and 205 printers at homes through out the community.

* We have enough 0.020/0.030 PETg sheets to make about 4000 more shields. This is hard to buy now and we are testing alternatives.

* We have enough filament to keep our printers running and are buying more. Our preferred filament is now on back order and we are sourcing directly from China.

* We are exploring injection molding for the head bands. This may take some time.

* We have shipped over 650 face shields. Yea! That is what it's all about.

3D printed face shields

2020-04-06T20:34:49Z

Hzeller: v1.9

[[File:Face shield front.jpg|200px]] [[File:Face shield side.jpg|350px]] [[File:Face shield top.jpg|350px]]

== Overview ==
Face shields are used by health care professionals to protect them when working with patients. Hospital supplies are running low. While they prefer to use commercially manufactured ones, in this emergency they are looking for alternative sources.

The headband portion of these shields is made on a 3D printer. If you have a 3D printer, you can make these. We have several at Maker Nexus that will be running as long as we have supplies. We deliver them to local hospitals.

* [https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform Sign up to use your own 3D printer] to help
* [https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform Sign up to receive face shields] for your health care facility

'''In the News'''

* A TV segment [https://sanfrancisco.cbslocal.com/video/4495791-maker-community-uses-3-d-printer-to-supply-ppe-to-health-professionals/ from KPIX]
* Watch a short [https://www.ktvu.com/news/covid-19-sunnyvale-company-designing-3d-protective-masks-to-meet-demand KTVU news report about our efforts.]

'''How much do they cost?'''

We give these away, paying for them from donations. We do not sell them. Promises of donations or actual donations do not affect who is prioritized to receive the PPE. The allocation team is not told who has donated. However, they cost us about $5 each to make. Donations are critical for us to be able to keep producing. We will make them until the money runs out.

[http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Is there really a need?'''

* We've heard from friends that "nurses are cutting up plastic soda bottles to make face shields, using saran wrap on top of N95 masks to allow for multi-use."
* One local nurse said they are making face shields from cut up shower curtains and hot glue guns.
* In reviewing the current design: "The nurses were over the moon about how easily the shields can be disassembled and sterilized."
* A nurse from Marin called us and I got her hooked into the allocation process and told her they were free. She started crying on the phone. - JimS

See [[Face Shield User Stories|stories from those who have received face shields from us]].

We are ramping up to make 1,000 a week, maybe more.

'''How do I get some?'''

If your health care facility needs face shields, fill in this form:

[https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform?usp=sf_link My Facility Needs Face Shields] (click the link)

A link to [[MN COVID Response|Other COVID Projects]]

== 3D Print Parts At Home ==

=== Use Your 3D Printer for good ===

'''Sign up'''

We are establishing a network of 3D printer owners who can make the headbands for us. You make them and deliver them to our facility where we do the assembly and get them to the hospitals. If you want to be part of our network, fill in this form and we will contact you:

[https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform I want to help make them]

=== What to do with the finished product ===
When you have parts ready to deliver, please follow the following steps:
# Fill out [https://docs.google.com/forms/d/e/1FAIpQLSdJfZz5M-xxQifJmFBdNQcn7c3i5eFabV7StA5ep9zsJuco9Q/viewform?usp=sf_link this form] with information about your donation (so we can track inventory)
# Seal in plastic bag.
# Label bag with your email, the version of face shield you printed (e.g. "MN 1.3" see releases in parts below; or "RC2" if you used that), the material printed with and the date you closed the bag.
# Mail to
Maker Nexus
234 E. Caribbean Drive
Sunnyvale, CA 94089
OR
Deliver to us if you are local and it does not violate the Shelter In Place Order - please do not make a special trip for this - but if you are passing by on your way to get essential groceries and want to drop it off, that is acceptable - there is a box outside our front door where donated parts can be placed.

Please be sure you are following proper sanitation procedures when you bag parts - if possible, wear gloves and a breathing mask, wipe or spray with disinfectant if available. We want to minimize the chance of cross-contamination. After it reaches MN, we will be further disinfecting them before delivering to its end destination.

We have some limited amount of 1.75mm PETg, ABS, and PLA that we can give you when you have dropped off 20 or more face shields parts. Supplies are very limited so please only take some if you need it. Just ring the door bell and ask if we have any filament in stock.

== 3D Print Directions ==

=== Materials ===

'''PETG filament Sources'''

These face shields are best done with PETG filament. A 1kg spool can make about 20 units.

* [http://matterhackers.com Matter Hackers]
** 3mm product id # MF3CF7NH 1kg about $25
** 1.75mm product id # M3MY2VQG 1kg about $24 (only $20 each if you buy 5)
** 1.75mm product id # MTVEPT25 10 pounds (4.5kg) about $185 It is a higher quality PETG filament, but is it really worth the extra cost?

'''PETG Sheet Sources'''

One 48x96 inch sheet can make about 24 shields.

* [http://www.piedmontplastics.com Piedmont Plastics] in San Leandro, CA. .020x48x96 CLR VIVAK PETG JFM about $16/sheet.

=== Instructions ===

'''Printer Settings'''

Print with '''PETG''' for ease of sanitation - IPA, Hydrogen Peroxide, Bleach, and Acetic Acid up to 10% can all be safely used with PETG.
If you don't have PETG, using '''ABS''' and '''PLA''' is also an approved option.

Print settings:
* Temperature based on filament selection.
* 3 perimeters
* 100% infill
* 0.3mm Draft settings in PrusaSlicer work fine
* we are running our Prusa's at 130% speed

=== Parts ===
We are focusing production based on the RC3 headband with with some MakerNexus modifications. If your printer cannot accommodate that on its bed, consider printing the bottom reinforcement parts.

Most important change is that the pins are centered in the headband, so that there is something covering the shield punch, making a better seal. Also, the radii in the crevices are larger than the original to facilitate easier sanitation.

Latest release is v1.9 (2020-04-06)

The print-output will have a version number based on the github revision on it imprinted so that it is easy to see just looking at a print. Current temple imprint looks like this

https://raw.githubusercontent.com/makernexus/prusa-covid19-shield-remix/v1.9/img/version-img.png

This archive contains (next to the source files) the following files used used to print, which you also can download here:

* '''Ready-to-go GCode''': [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.9/fab/T9-PETG-Prusa.gcode T9-PETG-Prusa.gcode] (right click, download or ''save link as...'') for '''PETG''', [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.9/fab/T9-PLA-Prusa.gcode T9-PLA-Prusa.gcode] for '''PLA'''. This prints two headbands and two bottom stabilizers. Using print-speed of 130% on the Prusa seems to work fine. If you use '''ABS''', please use the files below to slice for your printer. These print with little 'D-shaped' supports in front of the pins, that should break off easily.
* '''3MF slicer project file''' [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.9/thin_shield.3mf thin_shield.3mf] for PETG and [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.9/thin_pla_shield.3mf thin_pla_shield.3mf] for PLA. This allows you to choose placement, temperatures, select which parts to print on the bed etc.
* '''slice yourself''' [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.9/fab/thin_shield_with_support.stl thin_shield_with_support.stl] (right click, download or ''save link as...'') for PETG, [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.9/fab/thin_pla_shield_with_support.stl thin_pla_shield_with_support.stl] for PLA. There is also a no-support stl version in case you want to add support for the front-pins yourself in your slicer. If you _do_ print with build-in supports, make sure to enable the ''''Detect Thin Walls'''' feature in your slicer.

Also please print one [https://github.com/makernexus/prusa-covid19-shield-remix/raw/master/fab/bottom_reinforcement.stl bottom_reinforcement.stl] per headband (sometimes it is more efficient to do that separately) If you slice the version with built-in support, make sure to have 'enable thin wall detection' in your slicer. The 3mf files already have that enabled.

If your printer can't fit a headband, you can still help and print the bottom parts, stabilizing the shield plastic: Print as many [https://github.com/makernexus/prusa-covid19-shield-remix/raw/master/baseline/bottom_reinforcement.stl bottom_reinforcement.stl] that you fit on your print-bed: we need them as many people with larger print-beds focus on the headbands itself right now.

[[File:covid-headband-build-plate.png]]

More files, 3mf and STL you get directly on Github: https://github.com/makernexus/prusa-covid19-shield-remix#cut-to-the-chase-gcode-ready-to-use

== Laser Cut Parts ==

* [[:media:Wrapover-faceshield-laser.svg|The SVG file for laser cutting the shield part]] SVG File

The shields are cut from 0.020 inch thick PETG sheets. Our base design fits into sheets of 24"x32". If we get donations of larger sheets, then we cut it down before using it. We have successfully used 0.030, it is more expensive. 0.040 is too thick and will not snap onto the headband.

We tested laser cutting .015 PETG. Key takeaways: Works, but requires more cleaning. .020 is a clearly superior product, but .015 will work. The primary issue is that that lack of clear film on both surfaces results in smoke residue which can be wiped clean with typical cleaners. Mitigation - Alternative cutting process would alleviate the problem - CNC Drag knife of Vinyl Cutter may work. The thinner film results in a flexible shield more in line with disposable shield - this will likely result in fewer uses before being thrown away.

== Elastic Band ==

Each shield uses approximately 8 inches of button hole elastic, 3/4 inch wide.

Sources
* [https://www.homesew.com/ Home Sew]

== Assembly and Disassembly ==

'''Assembly'''

Assembly requires about 8" of 3/4 wide button hole elastic.

* A short video on [https://youtu.be/qKqDUExM4Q8 how to assemble the Maker Nexus face shield version RC2]

* The original design [https://www.prusaprinters.org/prints/25857-prusa-protective-face-shield-rc2 Prusa RC2 STL- On this page]

Each box of face shields contains a QR Code that links to [[Covid-19 Shield User Instructions]]

'''Disassembly for cleaning'''

These face shields can be taken apart for cleaning.

The sheets are made of PETG and can handle alcohol and UV. The head band and spreader could be made of PETG, ABS, or PLA. These all resist alcohol but are heat sensitive. We are not experts in how to sanitize equipment. You, as user, take responsibility for appropriate sanitization. See [https://help.prusa3d.com/en/article/prusa-face-shield-disinfection_125457#_ga=2.91675610.133084680.1585293016-139199844.1585293016 this page from Prusa Research] for information on sanitization methods currently being tested.

A short video on [https://www.youtube.com/watch?v=F7FFPzGeRME how to take the Maker Nexus face shield apart]

== Help at MN ==
At this time we do not need volunteers in the makerspace itself. The space is on lockdown so that we do not introduce the virus into our work area.

'''Donations Needed'''

* PETG filament is useful - if you aren't able to print yourself. Any color in both 1.75mm and 3mm diameter filament. It should be in a factory sealed box or in a bag with desiccant.
* 3/4"-1" button hole elastic
* 0.020" thick PETG film for disposable masks, sheets or rolls

You can drop-off the donations at Maker Nexus, just leave it in the box by the front door of Maker Nexus. Please use appropriate procedures when packaging - including wearing a new pair of gloves and a face mask if available.

You can also donate via PayPal towards COVID-19 efforts that Maker Nexus is working on. [http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Who to contact'''

MN members join the #covid-faceshield channel on [https://www.makernexus.com/member-dashboard Slack]

If you don't have access to Slack, please email [mailto:faceshields@makernexus.org faceshields@makernexus.org]

== External Links ==

=== Information & Discussions ===
- [https://join.slack.com/t/prusafaceshields/shared_invite/zt-cz809azp-f41jGEYZivRKWH6IcYEmKw External slack for Prusa Shield discussions]

== Status ==
As of 3/29/2020

* We have 15 3D printers at Maker Nexus and 205 printers at homes through out the community.

* We have enough 0.020/0.030 PETg sheets to make about 4000 more shields. This is hard to buy now and we are testing alternatives.

* We have enough filament to keep our printers running and are buying more. Our preferred filament is now on back order and we are sourcing directly from China.

* We are exploring injection molding for the head bands. This may take some time.

* We have shipped over 650 face shields. Yea! That is what it's all about.

3D printed face shields

2020-04-06T17:02:04Z

Hzeller: Add info about supports.

[[File:Face shield front.jpg|200px]] [[File:Face shield side.jpg|350px]] [[File:Face shield top.jpg|350px]]

== Overview ==
Face shields are used by health care professionals to protect them when working with patients. Hospital supplies are running low. While they prefer to use commercially manufactured ones, in this emergency they are looking for alternative sources.

The headband portion of these shields is made on a 3D printer. If you have a 3D printer, you can make these. We have several at Maker Nexus that will be running as long as we have supplies. We deliver them to local hospitals.

* [https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform Sign up to use your own 3D printer] to help
* [https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform Sign up to receive face shields] for your health care facility

'''In the News'''

* A TV segment [https://sanfrancisco.cbslocal.com/video/4495791-maker-community-uses-3-d-printer-to-supply-ppe-to-health-professionals/ from KPIX]
* Watch a short [https://www.ktvu.com/news/covid-19-sunnyvale-company-designing-3d-protective-masks-to-meet-demand KTVU news report about our efforts.]

'''How much do they cost?'''

We give these away, paying for them from donations. We do not sell them. Promises of donations or actual donations do not affect who is prioritized to receive the PPE. The allocation team is not told who has donated. However, they cost us about $5 each to make. Donations are critical for us to be able to keep producing. We will make them until the money runs out.

[http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Is there really a need?'''

* We've heard from friends that "nurses are cutting up plastic soda bottles to make face shields, using saran wrap on top of N95 masks to allow for multi-use."
* One local nurse said they are making face shields from cut up shower curtains and hot glue guns.
* In reviewing the current design: "The nurses were over the moon about how easily the shields can be disassembled and sterilized."
* A nurse from Marin called us and I got her hooked into the allocation process and told her they were free. She started crying on the phone. - JimS

See [[Face Shield User Stories|stories from those who have received face shields from us]].

We are ramping up to make 1,000 a week, maybe more.

'''How do I get some?'''

If your health care facility needs face shields, fill in this form:

[https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform?usp=sf_link My Facility Needs Face Shields] (click the link)

A link to [[MN COVID Response|Other COVID Projects]]

== 3D Print Parts At Home ==

=== Use Your 3D Printer for good ===

'''Sign up'''

We are establishing a network of 3D printer owners who can make the headbands for us. You make them and deliver them to our facility where we do the assembly and get them to the hospitals. If you want to be part of our network, fill in this form and we will contact you:

[https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform I want to help make them]

=== What to do with the finished product ===
When you have parts ready to deliver, please follow the following steps:
# Fill out [https://docs.google.com/forms/d/e/1FAIpQLSdJfZz5M-xxQifJmFBdNQcn7c3i5eFabV7StA5ep9zsJuco9Q/viewform?usp=sf_link this form] with information about your donation (so we can track inventory)
# Seal in plastic bag.
# Label bag with your email, the version of face shield you printed (e.g. "MN 1.3" see releases in parts below; or "RC2" if you used that), the material printed with and the date you closed the bag.
# Mail to
Maker Nexus
234 E. Caribbean Drive
Sunnyvale, CA 94089
OR
Deliver to us if you are local and it does not violate the Shelter In Place Order - please do not make a special trip for this - but if you are passing by on your way to get essential groceries and want to drop it off, that is acceptable - there is a box outside our front door where donated parts can be placed.

Please be sure you are following proper sanitation procedures when you bag parts - if possible, wear gloves and a breathing mask, wipe or spray with disinfectant if available. We want to minimize the chance of cross-contamination. After it reaches MN, we will be further disinfecting them before delivering to its end destination.

We have some limited amount of 1.75mm PETg, ABS, and PLA that we can give you when you have dropped off 20 or more face shields parts. Supplies are very limited so please only take some if you need it. Just ring the door bell and ask if we have any filament in stock.

== 3D Print Directions ==

=== Materials ===

'''PETG filament Sources'''

These face shields are best done with PETG filament. A 1kg spool can make about 20 units.

* [http://matterhackers.com Matter Hackers]
** 3mm product id # MF3CF7NH 1kg about $25
** 1.75mm product id # M3MY2VQG 1kg about $24 (only $20 each if you buy 5)
** 1.75mm product id # MTVEPT25 10 pounds (4.5kg) about $185 It is a higher quality PETG filament, but is it really worth the extra cost?

'''PETG Sheet Sources'''

One 48x96 inch sheet can make about 24 shields.

* [http://www.piedmontplastics.com Piedmont Plastics] in San Leandro, CA. .020x48x96 CLR VIVAK PETG JFM about $16/sheet.

=== Instructions ===

'''Printer Settings'''

Print with '''PETG''' for ease of sanitation - IPA, Hydrogen Peroxide, Bleach, and Acetic Acid up to 10% can all be safely used with PETG.
If you don't have PETG, using '''ABS''' and '''PLA''' is also an approved option.

Print settings:
* Temperature based on filament selection.
* 3 perimeters
* 100% infill
* 0.3mm Draft settings in PrusaSlicer work fine
* we are running our Prusa's at 130% speed

=== Parts ===
We are focusing production based on the RC3 headband with with some MakerNexus modifications. If your printer cannot accommodate that on its bed, consider printing the bottom reinforcement parts.

Most important change is that the pins are centered in the headband, so that there is something covering the shield punch, making a better seal. Also, the radii in the crevices are larger than the original to facilitate easier sanitation.

Latest release is v1.8 (2020-04-05)

The print-output will have a version number based on the github revision on it imprinted so that it is easy to see just looking at a print. Current temple imprint looks like this

https://raw.githubusercontent.com/makernexus/prusa-covid19-shield-remix/v1.8/img/version-img.png

This archive contains (next to the source files) the following files used used to print, which you also can download here:

* '''Ready-to-go GCode''': [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.8/fab/T8-PETG-Prusa.gcode T8-PETG-Prusa.gcode] (right click, download or ''save link as...'') for '''PETG''', [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.8/fab/T8-PLA-Prusa.gcode T8-PLA-Prusa.gcode] for '''PLA'''. This prints two headbands and two bottom stabilizers. Using print-speed of 130% on the Prusa seems to work fine. If you use '''ABS''', please use the files below to slice for your printer. These print with little 'D-shaped' supports in front of the pins, that should break off easily.
* '''3MF slicer project file''' [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.8/thin_shield.3mf thin_shield.3mf] for PETG and [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.8/thin_pla_shield.3mf thin_pla_shield.3mf] for PLA. This allows you to choose placement, temperatures, select which parts to print on the bed etc.
* '''slice yourself''' [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.8/fab/thin_shield_with_support.stl thin_shield_with_support.stl] (right click, download or ''save link as...'') for PETG, [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.8/fab/thin_pla_shield_with_support.stl thin_pla_shield_with_support.stl] for PLA. There is also a no-support stl version in case you want to add support for the front-pins yourself in your slicer. If you _do_ print with build-in supports, make sure to enable the ''''Detect Thin Walls'''' feature in your slicer.

Also please print one [https://github.com/makernexus/prusa-covid19-shield-remix/raw/master/fab/bottom_reinforcement.stl bottom_reinforcement.stl] per headband (sometimes it is more efficient to do that separately) If you slice the version with built-in support, make sure to have 'enable thin wall detection' in your slicer. The 3mf files already have that enabled.

If your printer can't fit a headband, you can still help and print the bottom parts, stabilizing the shield plastic: Print as many [https://github.com/makernexus/prusa-covid19-shield-remix/raw/master/baseline/bottom_reinforcement.stl bottom_reinforcement.stl] that you fit on your print-bed: we need them as many people with larger print-beds focus on the headbands itself right now.

[[File:covid-headband-build-plate.png]]

More files, 3mf and STL you get directly on Github: https://github.com/makernexus/prusa-covid19-shield-remix#cut-to-the-chase-gcode-ready-to-use

== Laser Cut Parts ==

* [[:media:Wrapover-faceshield-laser.svg|The SVG file for laser cutting the shield part]] SVG File

The shields are cut from 0.020 inch thick PETG sheets. Our base design fits into sheets of 24"x32". If we get donations of larger sheets, then we cut it down before using it. We have successfully used 0.030, it is more expensive. 0.040 is too thick and will not snap onto the headband.

We tested laser cutting .015 PETG. Key takeaways: Works, but requires more cleaning. .020 is a clearly superior product, but .015 will work. The primary issue is that that lack of clear film on both surfaces results in smoke residue which can be wiped clean with typical cleaners. Mitigation - Alternative cutting process would alleviate the problem - CNC Drag knife of Vinyl Cutter may work. The thinner film results in a flexible shield more in line with disposable shield - this will likely result in fewer uses before being thrown away.

== Elastic Band ==

Each shield uses approximately 8 inches of button hole elastic, 3/4 inch wide.

Sources
* [https://www.homesew.com/ Home Sew]

== Assembly and Disassembly ==

'''Assembly'''

Assembly requires about 8" of 3/4 wide button hole elastic.

* A short video on [https://youtu.be/qKqDUExM4Q8 how to assemble the Maker Nexus face shield version RC2]

* The original design [https://www.prusaprinters.org/prints/25857-prusa-protective-face-shield-rc2 Prusa RC2 STL- On this page]

Each box of face shields contains a QR Code that links to [[Covid-19 Shield User Instructions]]

'''Disassembly for cleaning'''

These face shields can be taken apart for cleaning.

The sheets are made of PETG and can handle alcohol and UV. The head band and spreader could be made of PETG, ABS, or PLA. These all resist alcohol but are heat sensitive. We are not experts in how to sanitize equipment. You, as user, take responsibility for appropriate sanitization. See [https://help.prusa3d.com/en/article/prusa-face-shield-disinfection_125457#_ga=2.91675610.133084680.1585293016-139199844.1585293016 this page from Prusa Research] for information on sanitization methods currently being tested.

A short video on [https://www.youtube.com/watch?v=F7FFPzGeRME how to take the Maker Nexus face shield apart]

== Help at MN ==
At this time we do not need volunteers in the makerspace itself. The space is on lockdown so that we do not introduce the virus into our work area.

'''Donations Needed'''

* PETG filament is useful - if you aren't able to print yourself. Any color in both 1.75mm and 3mm diameter filament. It should be in a factory sealed box or in a bag with desiccant.
* 3/4"-1" button hole elastic
* 0.020" thick PETG film for disposable masks, sheets or rolls

You can drop-off the donations at Maker Nexus, just leave it in the box by the front door of Maker Nexus. Please use appropriate procedures when packaging - including wearing a new pair of gloves and a face mask if available.

You can also donate via PayPal towards COVID-19 efforts that Maker Nexus is working on. [http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Who to contact'''

MN members join the #covid-faceshield channel on [https://www.makernexus.com/member-dashboard Slack]

If you don't have access to Slack, please email [mailto:faceshields@makernexus.org faceshields@makernexus.org]

== External Links ==

=== Information & Discussions ===
- [https://join.slack.com/t/prusafaceshields/shared_invite/zt-cz809azp-f41jGEYZivRKWH6IcYEmKw External slack for Prusa Shield discussions]

== Status ==
As of 3/29/2020

* We have 15 3D printers at Maker Nexus and 205 printers at homes through out the community.

* We have enough 0.020/0.030 PETg sheets to make about 4000 more shields. This is hard to buy now and we are testing alternatives.

* We have enough filament to keep our printers running and are buying more. Our preferred filament is now on back order and we are sourcing directly from China.

* We are exploring injection molding for the head bands. This may take some time.

* We have shipped over 650 face shields. Yea! That is what it's all about.

3D printed face shields

2020-04-06T07:11:39Z

Hzeller: different 3mf and stl for PETG and PLA

[[File:Face shield front.jpg|200px]] [[File:Face shield side.jpg|350px]] [[File:Face shield top.jpg|350px]]

== Overview ==
Face shields are used by health care professionals to protect them when working with patients. Hospital supplies are running low. While they prefer to use commercially manufactured ones, in this emergency they are looking for alternative sources.

The headband portion of these shields is made on a 3D printer. If you have a 3D printer, you can make these. We have several at Maker Nexus that will be running as long as we have supplies. We deliver them to local hospitals.

* [https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform Sign up to use your own 3D printer] to help
* [https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform Sign up to receive face shields] for your health care facility

'''In the News'''

* A TV segment [https://sanfrancisco.cbslocal.com/video/4495791-maker-community-uses-3-d-printer-to-supply-ppe-to-health-professionals/ from KPIX]
* Watch a short [https://www.ktvu.com/news/covid-19-sunnyvale-company-designing-3d-protective-masks-to-meet-demand KTVU news report about our efforts.]

'''How much do they cost?'''

We give these away, paying for them from donations. We do not sell them. Promises of donations or actual donations do not affect who is prioritized to receive the PPE. The allocation team is not told who has donated. However, they cost us about $5 each to make. Donations are critical for us to be able to keep producing. We will make them until the money runs out.

[http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Is there really a need?'''

* We've heard from friends that "nurses are cutting up plastic soda bottles to make face shields, using saran wrap on top of N95 masks to allow for multi-use."
* One local nurse said they are making face shields from cut up shower curtains and hot glue guns.
* In reviewing the current design: "The nurses were over the moon about how easily the shields can be disassembled and sterilized."
* A nurse from Marin called us and I got her hooked into the allocation process and told her they were free. She started crying on the phone. - JimS

See [[Face Shield User Stories|stories from those who have received face shields from us]].

We are ramping up to make 1,000 a week, maybe more.

'''How do I get some?'''

If your health care facility needs face shields, fill in this form:

[https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform?usp=sf_link My Facility Needs Face Shields] (click the link)

A link to [[MN COVID Response|Other COVID Projects]]

== 3D Print Parts At Home ==

=== Use Your 3D Printer for good ===

'''Sign up'''

We are establishing a network of 3D printer owners who can make the headbands for us. You make them and deliver them to our facility where we do the assembly and get them to the hospitals. If you want to be part of our network, fill in this form and we will contact you:

[https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform I want to help make them]

=== What to do with the finished product ===
When you have parts ready to deliver, please follow the following steps:
# Fill out [https://docs.google.com/forms/d/e/1FAIpQLSdJfZz5M-xxQifJmFBdNQcn7c3i5eFabV7StA5ep9zsJuco9Q/viewform?usp=sf_link this form] with information about your donation (so we can track inventory)
# Seal in plastic bag.
# Label bag with your email, the version of face shield you printed (e.g. "MN 1.3" see releases in parts below; or "RC2" if you used that), the material printed with and the date you closed the bag.
# Mail to
Maker Nexus
234 E. Caribbean Drive
Sunnyvale, CA 94089
OR
Deliver to us if you are local and it does not violate the Shelter In Place Order - please do not make a special trip for this - but if you are passing by on your way to get essential groceries and want to drop it off, that is acceptable - there is a box outside our front door where donated parts can be placed.

Please be sure you are following proper sanitation procedures when you bag parts - if possible, wear gloves and a breathing mask, wipe or spray with disinfectant if available. We want to minimize the chance of cross-contamination. After it reaches MN, we will be further disinfecting them before delivering to its end destination.

We have some limited amount of 1.75mm PETg, ABS, and PLA that we can give you when you have dropped off 20 or more face shields parts. Supplies are very limited so please only take some if you need it. Just ring the door bell and ask if we have any filament in stock.

== 3D Print Directions ==

=== Materials ===

'''PETG filament Sources'''

These face shields are best done with PETG filament. A 1kg spool can make about 20 units.

* [http://matterhackers.com Matter Hackers]
** 3mm product id # MF3CF7NH 1kg about $25
** 1.75mm product id # M3MY2VQG 1kg about $24 (only $20 each if you buy 5)
** 1.75mm product id # MTVEPT25 10 pounds (4.5kg) about $185 It is a higher quality PETG filament, but is it really worth the extra cost?

'''PETG Sheet Sources'''

One 48x96 inch sheet can make about 24 shields.

* [http://www.piedmontplastics.com Piedmont Plastics] in San Leandro, CA. .020x48x96 CLR VIVAK PETG JFM about $16/sheet.

=== Instructions ===

'''Printer Settings'''

Print with '''PETG''' for ease of sanitation - IPA, Hydrogen Peroxide, Bleach, and Acetic Acid up to 10% can all be safely used with PETG.
If you don't have PETG, using '''ABS''' and '''PLA''' is also an approved option.

Print settings:
* Temperature based on filament selection.
* 3 perimeters
* 100% infill
* 0.3mm Draft settings in PrusaSlicer work fine
* we are running our Prusa's at 130% speed

=== Parts ===
We are focusing production based on the RC3 headband with with some MakerNexus modifications. If your printer cannot accommodate that on its bed, consider printing the bottom reinforcement parts.

Most important change is that the pins are centered in the headband, so that there is something covering the shield punch, making a better seal. Also, the radii in the crevices are larger than the original to facilitate easier sanitation.

Latest release is v1.8 (2020-04-05)

The print-output will have a version number based on the github revision on it imprinted so that it is easy to see just looking at a print. Current temple imprint looks like this

https://raw.githubusercontent.com/makernexus/prusa-covid19-shield-remix/v1.8/img/version-img.png

This archive contains (next to the source files) the following files used used to print, which you also can download here:

* '''Ready-to-go GCode''': [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.8/fab/T8-PETG-Prusa.gcode T8-PETG-Prusa.gcode] (right click, download or ''save link as...'') for '''PETG''', [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.8/fab/T8-PLA-Prusa.gcode T8-PLA-Prusa.gcode] for '''PLA'''. This prints two headbands and two bottom stabilizers. Using print-speed of 130% on the Prusa seems to work fine. If you use '''ABS''', please use the files below to slice for your printer.
* '''3MF slicer project file''' [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.8/thin_shield.3mf thin_shield.3mf] for PETG and [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.8/thin_pla_shield.3mf thin_pla_shield.3mf] for PLA. This allows you to choose placement, temperatures, select which parts to print on the bed etc.
* '''slice yourself''' [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.8/fab/thin_shield_with_support.stl thin_shield_with_support.stl] (right click, download or ''save link as...'') for PETG, [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.8/fab/thin_pla_shield_with_support.stl thin_pla_shield_with_support.stl] for PLA. There is also a no-support stl version in case you want to add support for the front-pins yourself in your slicer.

Also please print one [https://github.com/makernexus/prusa-covid19-shield-remix/raw/master/fab/bottom_reinforcement.stl bottom_reinforcement.stl] per headband (sometimes it is more efficient to do that separately) If you slice the version with built-in support, make sure to have 'enable thin wall detection' in your slicer. The 3mf files already have that enabled.

If your printer can't fit a headband, you can still help and print the bottom parts, stabilizing the shield plastic: Print as many [https://github.com/makernexus/prusa-covid19-shield-remix/raw/master/baseline/bottom_reinforcement.stl bottom_reinforcement.stl] that you fit on your print-bed: we need them as many people with larger print-beds focus on the headbands itself right now.

[[File:covid-headband-build-plate.png]]

More files, 3mf and STL you get directly on Github: https://github.com/makernexus/prusa-covid19-shield-remix#cut-to-the-chase-gcode-ready-to-use

== Laser Cut Parts ==

* [[:media:Wrapover-faceshield-laser.svg|The SVG file for laser cutting the shield part]] SVG File

The shields are cut from 0.020 inch thick PETG sheets. Our base design fits into sheets of 24"x32". If we get donations of larger sheets, then we cut it down before using it. We have successfully used 0.030, it is more expensive. 0.040 is too thick and will not snap onto the headband.

We tested laser cutting .015 PETG. Key takeaways: Works, but requires more cleaning. .020 is a clearly superior product, but .015 will work. The primary issue is that that lack of clear film on both surfaces results in smoke residue which can be wiped clean with typical cleaners. Mitigation - Alternative cutting process would alleviate the problem - CNC Drag knife of Vinyl Cutter may work. The thinner film results in a flexible shield more in line with disposable shield - this will likely result in fewer uses before being thrown away.

== Elastic Band ==

Each shield uses approximately 8 inches of button hole elastic, 3/4 inch wide.

Sources
* [https://www.homesew.com/ Home Sew]

== Assembly and Disassembly ==

'''Assembly'''

Assembly requires about 8" of 3/4 wide button hole elastic.

* A short video on [https://youtu.be/qKqDUExM4Q8 how to assemble the Maker Nexus face shield version RC2]

* The original design [https://www.prusaprinters.org/prints/25857-prusa-protective-face-shield-rc2 Prusa RC2 STL- On this page]

Each box of face shields contains a QR Code that links to [[Covid-19 Shield User Instructions]]

'''Disassembly for cleaning'''

These face shields can be taken apart for cleaning.

The sheets are made of PETG and can handle alcohol and UV. The head band and spreader could be made of PETG, ABS, or PLA. These all resist alcohol but are heat sensitive. We are not experts in how to sanitize equipment. You, as user, take responsibility for appropriate sanitization. See [https://help.prusa3d.com/en/article/prusa-face-shield-disinfection_125457#_ga=2.91675610.133084680.1585293016-139199844.1585293016 this page from Prusa Research] for information on sanitization methods currently being tested.

A short video on [https://www.youtube.com/watch?v=F7FFPzGeRME how to take the Maker Nexus face shield apart]

== Help at MN ==
At this time we do not need volunteers in the makerspace itself. The space is on lockdown so that we do not introduce the virus into our work area.

'''Donations Needed'''

* PETG filament is useful - if you aren't able to print yourself. Any color in both 1.75mm and 3mm diameter filament. It should be in a factory sealed box or in a bag with desiccant.
* 3/4"-1" button hole elastic
* 0.020" thick PETG film for disposable masks, sheets or rolls

You can drop-off the donations at Maker Nexus, just leave it in the box by the front door of Maker Nexus. Please use appropriate procedures when packaging - including wearing a new pair of gloves and a face mask if available.

You can also donate via PayPal towards COVID-19 efforts that Maker Nexus is working on. [http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Who to contact'''

MN members join the #covid-faceshield channel on [https://www.makernexus.com/member-dashboard Slack]

If you don't have access to Slack, please email [mailto:faceshields@makernexus.org faceshields@makernexus.org]

== External Links ==

=== Information & Discussions ===
- [https://join.slack.com/t/prusafaceshields/shared_invite/zt-cz809azp-f41jGEYZivRKWH6IcYEmKw External slack for Prusa Shield discussions]

== Status ==
As of 3/29/2020

* We have 15 3D printers at Maker Nexus and 205 printers at homes through out the community.

* We have enough 0.020/0.030 PETg sheets to make about 4000 more shields. This is hard to buy now and we are testing alternatives.

* We have enough filament to keep our printers running and are buying more. Our preferred filament is now on back order and we are sourcing directly from China.

* We are exploring injection molding for the head bands. This may take some time.

* We have shipped over 650 face shields. Yea! That is what it's all about.

3D printed face shields

2020-04-06T07:08:33Z

Hzeller: Version -> 1.8

[[File:Face shield front.jpg|200px]] [[File:Face shield side.jpg|350px]] [[File:Face shield top.jpg|350px]]

== Overview ==
Face shields are used by health care professionals to protect them when working with patients. Hospital supplies are running low. While they prefer to use commercially manufactured ones, in this emergency they are looking for alternative sources.

The headband portion of these shields is made on a 3D printer. If you have a 3D printer, you can make these. We have several at Maker Nexus that will be running as long as we have supplies. We deliver them to local hospitals.

* [https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform Sign up to use your own 3D printer] to help
* [https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform Sign up to receive face shields] for your health care facility

'''In the News'''

* A TV segment [https://sanfrancisco.cbslocal.com/video/4495791-maker-community-uses-3-d-printer-to-supply-ppe-to-health-professionals/ from KPIX]
* Watch a short [https://www.ktvu.com/news/covid-19-sunnyvale-company-designing-3d-protective-masks-to-meet-demand KTVU news report about our efforts.]

'''How much do they cost?'''

We give these away, paying for them from donations. We do not sell them. Promises of donations or actual donations do not affect who is prioritized to receive the PPE. The allocation team is not told who has donated. However, they cost us about $5 each to make. Donations are critical for us to be able to keep producing. We will make them until the money runs out.

[http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Is there really a need?'''

* We've heard from friends that "nurses are cutting up plastic soda bottles to make face shields, using saran wrap on top of N95 masks to allow for multi-use."
* One local nurse said they are making face shields from cut up shower curtains and hot glue guns.
* In reviewing the current design: "The nurses were over the moon about how easily the shields can be disassembled and sterilized."
* A nurse from Marin called us and I got her hooked into the allocation process and told her they were free. She started crying on the phone. - JimS

See [[Face Shield User Stories|stories from those who have received face shields from us]].

We are ramping up to make 1,000 a week, maybe more.

'''How do I get some?'''

If your health care facility needs face shields, fill in this form:

[https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform?usp=sf_link My Facility Needs Face Shields] (click the link)

A link to [[MN COVID Response|Other COVID Projects]]

== 3D Print Parts At Home ==

=== Use Your 3D Printer for good ===

'''Sign up'''

We are establishing a network of 3D printer owners who can make the headbands for us. You make them and deliver them to our facility where we do the assembly and get them to the hospitals. If you want to be part of our network, fill in this form and we will contact you:

[https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform I want to help make them]

=== What to do with the finished product ===
When you have parts ready to deliver, please follow the following steps:
# Fill out [https://docs.google.com/forms/d/e/1FAIpQLSdJfZz5M-xxQifJmFBdNQcn7c3i5eFabV7StA5ep9zsJuco9Q/viewform?usp=sf_link this form] with information about your donation (so we can track inventory)
# Seal in plastic bag.
# Label bag with your email, the version of face shield you printed (e.g. "MN 1.3" see releases in parts below; or "RC2" if you used that), the material printed with and the date you closed the bag.
# Mail to
Maker Nexus
234 E. Caribbean Drive
Sunnyvale, CA 94089
OR
Deliver to us if you are local and it does not violate the Shelter In Place Order - please do not make a special trip for this - but if you are passing by on your way to get essential groceries and want to drop it off, that is acceptable - there is a box outside our front door where donated parts can be placed.

Please be sure you are following proper sanitation procedures when you bag parts - if possible, wear gloves and a breathing mask, wipe or spray with disinfectant if available. We want to minimize the chance of cross-contamination. After it reaches MN, we will be further disinfecting them before delivering to its end destination.

We have some limited amount of 1.75mm PETg, ABS, and PLA that we can give you when you have dropped off 20 or more face shields parts. Supplies are very limited so please only take some if you need it. Just ring the door bell and ask if we have any filament in stock.

== 3D Print Directions ==

=== Materials ===

'''PETG filament Sources'''

These face shields are best done with PETG filament. A 1kg spool can make about 20 units.

* [http://matterhackers.com Matter Hackers]
** 3mm product id # MF3CF7NH 1kg about $25
** 1.75mm product id # M3MY2VQG 1kg about $24 (only $20 each if you buy 5)
** 1.75mm product id # MTVEPT25 10 pounds (4.5kg) about $185 It is a higher quality PETG filament, but is it really worth the extra cost?

'''PETG Sheet Sources'''

One 48x96 inch sheet can make about 24 shields.

* [http://www.piedmontplastics.com Piedmont Plastics] in San Leandro, CA. .020x48x96 CLR VIVAK PETG JFM about $16/sheet.

=== Instructions ===

'''Printer Settings'''

Print with '''PETG''' for ease of sanitation - IPA, Hydrogen Peroxide, Bleach, and Acetic Acid up to 10% can all be safely used with PETG.
If you don't have PETG, using '''ABS''' and '''PLA''' is also an approved option.

Print settings:
* Temperature based on filament selection.
* 3 perimeters
* 100% infill
* 0.3mm Draft settings in PrusaSlicer work fine
* we are running our Prusa's at 130% speed

=== Parts ===
We are focusing production based on the RC3 headband with with some MakerNexus modifications. If your printer cannot accommodate that on its bed, consider printing the bottom reinforcement parts.

Most important change is that the pins are centered in the headband, so that there is something covering the shield punch, making a better seal. Also, the radii in the crevices are larger than the original to facilitate easier sanitation.

Latest release is v1.8 (2020-04-05)

The print-output will have a version number based on the github revision on it imprinted so that it is easy to see just looking at a print. Current temple imprint looks like this

https://raw.githubusercontent.com/makernexus/prusa-covid19-shield-remix/v1.8/img/version-img.png

This archive contains (next to the source files) the following files used used to print, which you also can download here:

* '''Ready-to-go GCode''': [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.8/fab/T8-PETG-Prusa.gcode T8-PETG-Prusa.gcode] (right click, download or ''save link as...'') for '''PETG''', [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.8/fab/T8-PLA-Prusa.gcode T8-PLA-Prusa.gcode] for '''PLA'''. This prints two headbands and two bottom stabilizers. Using print-speed of 130% on the Prusa seems to work fine. If you use '''ABS''', please use the files below to slice for your printer.
* '''3MF slicer project file''' [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.8/thin_shield.3mf thin_shield.3mf] This allows you to choose placement, temperatures, select which parts to print on the bed etc.
* '''slice yourself''' [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.8/fab/thin_shield_with_support.stl thin_shield_with_support.stl] (right click, download or ''save link as...''). There is also a no-support stl version in case you want to add support for the front-pins yourself in your slicer.

Also please print one [https://github.com/makernexus/prusa-covid19-shield-remix/raw/master/fab/bottom_reinforcement.stl bottom_reinforcement.stl] per headband (sometimes it is more efficient to do that separately) If you slice the version with built-in support, make sure to have 'enable thin wall detection' in your slicer. The 3mf files already have that enabled.

If your printer can't fit a headband, you can still help and print the bottom parts, stabilizing the shield plastic: Print as many [https://github.com/makernexus/prusa-covid19-shield-remix/raw/master/baseline/bottom_reinforcement.stl bottom_reinforcement.stl] that you fit on your print-bed: we need them as many people with larger print-beds focus on the headbands itself right now.

[[File:covid-headband-build-plate.png]]

More files, 3mf and STL you get directly on Github: https://github.com/makernexus/prusa-covid19-shield-remix#cut-to-the-chase-gcode-ready-to-use

== Laser Cut Parts ==

* [[:media:Wrapover-faceshield-laser.svg|The SVG file for laser cutting the shield part]] SVG File

The shields are cut from 0.020 inch thick PETG sheets. Our base design fits into sheets of 24"x32". If we get donations of larger sheets, then we cut it down before using it. We have successfully used 0.030, it is more expensive. 0.040 is too thick and will not snap onto the headband.

We tested laser cutting .015 PETG. Key takeaways: Works, but requires more cleaning. .020 is a clearly superior product, but .015 will work. The primary issue is that that lack of clear film on both surfaces results in smoke residue which can be wiped clean with typical cleaners. Mitigation - Alternative cutting process would alleviate the problem - CNC Drag knife of Vinyl Cutter may work. The thinner film results in a flexible shield more in line with disposable shield - this will likely result in fewer uses before being thrown away.

== Elastic Band ==

Each shield uses approximately 8 inches of button hole elastic, 3/4 inch wide.

Sources
* [https://www.homesew.com/ Home Sew]

== Assembly and Disassembly ==

'''Assembly'''

Assembly requires about 8" of 3/4 wide button hole elastic.

* A short video on [https://youtu.be/qKqDUExM4Q8 how to assemble the Maker Nexus face shield version RC2]

* The original design [https://www.prusaprinters.org/prints/25857-prusa-protective-face-shield-rc2 Prusa RC2 STL- On this page]

Each box of face shields contains a QR Code that links to [[Covid-19 Shield User Instructions]]

'''Disassembly for cleaning'''

These face shields can be taken apart for cleaning.

The sheets are made of PETG and can handle alcohol and UV. The head band and spreader could be made of PETG, ABS, or PLA. These all resist alcohol but are heat sensitive. We are not experts in how to sanitize equipment. You, as user, take responsibility for appropriate sanitization. See [https://help.prusa3d.com/en/article/prusa-face-shield-disinfection_125457#_ga=2.91675610.133084680.1585293016-139199844.1585293016 this page from Prusa Research] for information on sanitization methods currently being tested.

A short video on [https://www.youtube.com/watch?v=F7FFPzGeRME how to take the Maker Nexus face shield apart]

== Help at MN ==
At this time we do not need volunteers in the makerspace itself. The space is on lockdown so that we do not introduce the virus into our work area.

'''Donations Needed'''

* PETG filament is useful - if you aren't able to print yourself. Any color in both 1.75mm and 3mm diameter filament. It should be in a factory sealed box or in a bag with desiccant.
* 3/4"-1" button hole elastic
* 0.020" thick PETG film for disposable masks, sheets or rolls

You can drop-off the donations at Maker Nexus, just leave it in the box by the front door of Maker Nexus. Please use appropriate procedures when packaging - including wearing a new pair of gloves and a face mask if available.

You can also donate via PayPal towards COVID-19 efforts that Maker Nexus is working on. [http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Who to contact'''

MN members join the #covid-faceshield channel on [https://www.makernexus.com/member-dashboard Slack]

If you don't have access to Slack, please email [mailto:faceshields@makernexus.org faceshields@makernexus.org]

== External Links ==

=== Information & Discussions ===
- [https://join.slack.com/t/prusafaceshields/shared_invite/zt-cz809azp-f41jGEYZivRKWH6IcYEmKw External slack for Prusa Shield discussions]

== Status ==
As of 3/29/2020

* We have 15 3D printers at Maker Nexus and 205 printers at homes through out the community.

* We have enough 0.020/0.030 PETg sheets to make about 4000 more shields. This is hard to buy now and we are testing alternatives.

* We have enough filament to keep our printers running and are buying more. Our preferred filament is now on back order and we are sourcing directly from China.

* We are exploring injection molding for the head bands. This may take some time.

* We have shipped over 650 face shields. Yea! That is what it's all about.

3D printed face shields

2020-04-05T20:20:03Z

Hzeller: Simplify structure : don't but a single sub-heading unter Parts.

[[File:Face shield front.jpg|200px]] [[File:Face shield side.jpg|350px]] [[File:Face shield top.jpg|350px]]

== Overview ==
Face shields are used by health care professionals to protect them when working with patients. Hospital supplies are running low. While they prefer to use commercially manufactured ones, in this emergency they are looking for alternative sources.

The headband portion of these shields is made on a 3D printer. If you have a 3D printer, you can make these. We have several at Maker Nexus that will be running as long as we have supplies. We deliver them to local hospitals.

* [https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform Sign up to use your own 3D printer] to help
* [https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform Sign up to receive face shields] for your health care facility

'''In the News'''

* A TV segment [https://sanfrancisco.cbslocal.com/video/4495791-maker-community-uses-3-d-printer-to-supply-ppe-to-health-professionals/ from KPIX]
* Watch a short [https://www.ktvu.com/news/covid-19-sunnyvale-company-designing-3d-protective-masks-to-meet-demand KTVU news report about our efforts.]

'''How much do they cost?'''

We give these away, paying for them from donations. We do not sell them. Promises of donations or actual donations do not affect who is prioritized to receive the PPE. The allocation team is not told who has donated. However, they cost us about $5 each to make. Donations are critical for us to be able to keep producing. We will make them until the money runs out.

[http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Is there really a need?'''

* We've heard from friends that "nurses are cutting up plastic soda bottles to make face shields, using saran wrap on top of N95 masks to allow for multi-use."
* One local nurse said they are making face shields from cut up shower curtains and hot glue guns.
* In reviewing the current design: "The nurses were over the moon about how easily the shields can be disassembled and sterilized."
* A nurse from Marin called us and I got her hooked into the allocation process and told her they were free. She started crying on the phone. - JimS

See [[Face Shield User Stories|stories from those who have received face shields from us]].

We are ramping up to make 1,000 a week, maybe more.

'''How do I get some?'''

If your health care facility needs face shields, fill in this form:

[https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform?usp=sf_link My Facility Needs Face Shields] (click the link)

A link to [[MN COVID Response|Other COVID Projects]]

== 3D Print Parts At Home ==

=== Use Your 3D Printer for good ===

'''Sign up'''

We are establishing a network of 3D printer owners who can make the headbands for us. You make them and deliver them to our facility where we do the assembly and get them to the hospitals. If you want to be part of our network, fill in this form and we will contact you:

[https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform I want to help make them]

=== What to do with the finished product ===
When you have parts ready to deliver, please follow the following steps:
# Fill out [https://docs.google.com/forms/d/e/1FAIpQLSdJfZz5M-xxQifJmFBdNQcn7c3i5eFabV7StA5ep9zsJuco9Q/viewform?usp=sf_link this form] with information about your donation (so we can track inventory)
# Seal in plastic bag.
# Label bag with your email, the version of face shield you printed (e.g. "MN 1.3" see releases in parts below; or "RC2" if you used that), the material printed with and the date you closed the bag.
# Mail to
Maker Nexus
234 E. Caribbean Drive
Sunnyvale, CA 94089
OR
Deliver to us if you are local and it does not violate the Shelter In Place Order - please do not make a special trip for this - but if you are passing by on your way to get essential groceries and want to drop it off, that is acceptable - there is a box outside our front door where donated parts can be placed.

Please be sure you are following proper sanitation procedures when you bag parts - if possible, wear gloves and a breathing mask, wipe or spray with disinfectant if available. We want to minimize the chance of cross-contamination. After it reaches MN, we will be further disinfecting them before delivering to its end destination.

We have some limited amount of 1.75mm PETg, ABS, and PLA that we can give you when you have dropped off 20 or more face shields parts. Supplies are very limited so please only take some if you need it. Just ring the door bell and ask if we have any filament in stock.

== 3D Print Directions ==

=== Materials ===

'''PETG filament Sources'''

These face shields are best done with PETG filament. A 1kg spool can make about 20 units.

* [http://matterhackers.com Matter Hackers]
** 3mm product id # MF3CF7NH 1kg about $25
** 1.75mm product id # M3MY2VQG 1kg about $24 (only $20 each if you buy 5)
** 1.75mm product id # MTVEPT25 10 pounds (4.5kg) about $185 It is a higher quality PETG filament, but is it really worth the extra cost?

'''PETG Sheet Sources'''

One 48x96 inch sheet can make about 24 shields.

* [http://www.piedmontplastics.com Piedmont Plastics] in San Leandro, CA. .020x48x96 CLR VIVAK PETG JFM about $16/sheet.

=== Instructions ===

'''Printer Settings'''

Print with '''PETG''' for ease of sanitation - IPA, Hydrogen Peroxide, Bleach, and Acetic Acid up to 10% can all be safely used with PETG.
If you don't have PETG, using '''ABS''' and '''PLA''' is also an approved option.

Print settings:
* Temperature based on filament selection.
* 3 perimeters
* 100% infill
* 0.3mm Draft settings in PrusaSlicer work fine
* we are running our Prusa's at 130% speed

=== Parts ===
We are focusing production based on the RC3 headband with with some MakerNexus modifications. If your printer cannot accommodate that on its bed, consider printing the bottom reinforcement parts.

Most important change is that the pins are centered in the headband, so that there is something covering the shield punch, making a better seal. Also, the radii in the crevices are larger than the original to facilitate easier sanitation.

Latest release is v1.7 (2020-04-05)

The print-output will have a version number based on the github revision on it imprinted so that it is easy to see just looking at a print. Current temple imprint looks like this

https://raw.githubusercontent.com/makernexus/prusa-covid19-shield-remix/v1.7/img/version-img.png

This archive contains (next to the source files) the following files used used to print, which you also can download here:

* '''Ready-to-go GCode''': [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.7/fab/T7-PETG-Prusa.gcode T7-PETG-Prusa.gcode] (right click, download or ''save link as...'') for '''PETG''', [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.7/fab/T7-PLA-Prusa.gcode T7-PLA-Prusa.gcode] for '''PLA'''. This prints two headbands and two bottom stabilizers. Using print-speed of 130% on the Prusa seems to work fine. If you use '''ABS''', please use the files below to slice for your printer.
* '''3MF slicer project file''' [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.7/thin_shield.3mf thin_shield.3mf] This allows you to choose placement, temperatures, select which parts to print on the bed etc.
* '''slice yourself''' [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.7/fab/thin_shield_with_support.stl thin_shield_with_support.stl] (right click, download or ''save link as...''). There is also a no-support stl version in case you want to add support for the front-pins yourself in your slicer.

Also please print one [https://github.com/makernexus/prusa-covid19-shield-remix/raw/master/fab/bottom_reinforcement.stl bottom_reinforcement.stl] per headband (sometimes it is more efficient to do that separately) If you slice the version with built-in support, make sure to have 'enable thin wall detection' in your slicer. The 3mf files already have that enabled.

If your printer can't fit a headband, you can still help and print the bottom parts, stabilizing the shield plastic: Print as many [https://github.com/makernexus/prusa-covid19-shield-remix/raw/master/baseline/bottom_reinforcement.stl bottom_reinforcement.stl] that you fit on your print-bed: we need them as many people with larger print-beds focus on the headbands itself right now.

[[File:covid-headband-build-plate.png]]

More files, 3mf and STL you get directly on Github: https://github.com/makernexus/prusa-covid19-shield-remix#cut-to-the-chase-gcode-ready-to-use

== Laser Cut Parts ==

* [[:media:Wrapover-faceshield-laser.svg|The SVG file for laser cutting the shield part]] SVG File

The shields are cut from 0.020 inch thick PETG sheets. Our base design fits into sheets of 24"x32". If we get donations of larger sheets, then we cut it down before using it. We have successfully used 0.030, it is more expensive. 0.040 is too thick and will not snap onto the headband.

We tested laser cutting .015 PETG. Key takeaways: Works, but requires more cleaning. .020 is a clearly superior product, but .015 will work. The primary issue is that that lack of clear film on both surfaces results in smoke residue which can be wiped clean with typical cleaners. Mitigation - Alternative cutting process would alleviate the problem - CNC Drag knife of Vinyl Cutter may work. The thinner film results in a flexible shield more in line with disposable shield - this will likely result in fewer uses before being thrown away.

== Elastic Band ==

Each shield uses approximately 8 inches of button hole elastic, 3/4 inch wide.

Sources
* [https://www.homesew.com/ Home Sew]

== Assembly and Disassembly ==

'''Assembly'''

Assembly requires about 8" of 3/4 wide button hole elastic.

* A short video on [https://youtu.be/qKqDUExM4Q8 how to assemble the Maker Nexus face shield version RC2]

* The original design [https://www.prusaprinters.org/prints/25857-prusa-protective-face-shield-rc2 Prusa RC2 STL- On this page]

Each box of face shields contains a QR Code that links to [[Covid-19 Shield User Instructions]]

'''Disassembly for cleaning'''

These face shields can be taken apart for cleaning.

The sheets are made of PETG and can handle alcohol and UV. The head band and spreader could be made of PETG, ABS, or PLA. These all resist alcohol but are heat sensitive. We are not experts in how to sanitize equipment. You, as user, take responsibility for appropriate sanitization. See [https://help.prusa3d.com/en/article/prusa-face-shield-disinfection_125457#_ga=2.91675610.133084680.1585293016-139199844.1585293016 this page from Prusa Research] for information on sanitization methods currently being tested.

A short video on [https://www.youtube.com/watch?v=F7FFPzGeRME how to take the Maker Nexus face shield apart]

== Help at MN ==
At this time we do not need volunteers in the makerspace itself. The space is on lockdown so that we do not introduce the virus into our work area.

'''Donations Needed'''

* PETG filament is useful - if you aren't able to print yourself. Any color in both 1.75mm and 3mm diameter filament. It should be in a factory sealed box or in a bag with desiccant.
* 3/4"-1" button hole elastic
* 0.020" thick PETG film for disposable masks, sheets or rolls

You can drop-off the donations at Maker Nexus, just leave it in the box by the front door of Maker Nexus. Please use appropriate procedures when packaging - including wearing a new pair of gloves and a face mask if available.

You can also donate via PayPal towards COVID-19 efforts that Maker Nexus is working on. [http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Who to contact'''

MN members join the #covid-faceshield channel on [https://www.makernexus.com/member-dashboard Slack]

If you don't have access to Slack, please email [mailto:faceshields@makernexus.org faceshields@makernexus.org]

== External Links ==

=== Information & Discussions ===
- [https://join.slack.com/t/prusafaceshields/shared_invite/zt-cz809azp-f41jGEYZivRKWH6IcYEmKw External slack for Prusa Shield discussions]

== Status ==
As of 3/29/2020

* We have 15 3D printers at Maker Nexus and 205 printers at homes through out the community.

* We have enough 0.020/0.030 PETg sheets to make about 4000 more shields. This is hard to buy now and we are testing alternatives.

* We have enough filament to keep our printers running and are buying more. Our preferred filament is now on back order and we are sourcing directly from China.

* We are exploring injection molding for the head bands. This may take some time.

* We have shipped over 650 face shields. Yea! That is what it's all about.

3D printed face shields

2020-04-05T20:11:41Z

Hzeller: Remove other versions section to minimize confusion.

[[File:Face shield front.jpg|200px]] [[File:Face shield side.jpg|350px]] [[File:Face shield top.jpg|350px]]

== Overview ==
Face shields are used by health care professionals to protect them when working with patients. Hospital supplies are running low. While they prefer to use commercially manufactured ones, in this emergency they are looking for alternative sources.

The headband portion of these shields is made on a 3D printer. If you have a 3D printer, you can make these. We have several at Maker Nexus that will be running as long as we have supplies. We deliver them to local hospitals.

* [https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform Sign up to use your own 3D printer] to help
* [https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform Sign up to receive face shields] for your health care facility

'''In the News'''

* A TV segment [https://sanfrancisco.cbslocal.com/video/4495791-maker-community-uses-3-d-printer-to-supply-ppe-to-health-professionals/ from KPIX]
* Watch a short [https://www.ktvu.com/news/covid-19-sunnyvale-company-designing-3d-protective-masks-to-meet-demand KTVU news report about our efforts.]

'''How much do they cost?'''

We give these away, paying for them from donations. We do not sell them. Promises of donations or actual donations do not affect who is prioritized to receive the PPE. The allocation team is not told who has donated. However, they cost us about $5 each to make. Donations are critical for us to be able to keep producing. We will make them until the money runs out.

[http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Is there really a need?'''

* We've heard from friends that "nurses are cutting up plastic soda bottles to make face shields, using saran wrap on top of N95 masks to allow for multi-use."
* One local nurse said they are making face shields from cut up shower curtains and hot glue guns.
* In reviewing the current design: "The nurses were over the moon about how easily the shields can be disassembled and sterilized."
* A nurse from Marin called us and I got her hooked into the allocation process and told her they were free. She started crying on the phone. - JimS

See [[Face Shield User Stories|stories from those who have received face shields from us]].

We are ramping up to make 1,000 a week, maybe more.

'''How do I get some?'''

If your health care facility needs face shields, fill in this form:

[https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform?usp=sf_link My Facility Needs Face Shields] (click the link)

A link to [[MN COVID Response|Other COVID Projects]]

== 3D Print Parts At Home ==

=== Use Your 3D Printer for good ===

'''Sign up'''

We are establishing a network of 3D printer owners who can make the headbands for us. You make them and deliver them to our facility where we do the assembly and get them to the hospitals. If you want to be part of our network, fill in this form and we will contact you:

[https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform I want to help make them]

=== What to do with the finished product ===
When you have parts ready to deliver, please follow the following steps:
# Fill out [https://docs.google.com/forms/d/e/1FAIpQLSdJfZz5M-xxQifJmFBdNQcn7c3i5eFabV7StA5ep9zsJuco9Q/viewform?usp=sf_link this form] with information about your donation (so we can track inventory)
# Seal in plastic bag.
# Label bag with your email, the version of face shield you printed (e.g. "MN 1.3" see releases in parts below; or "RC2" if you used that), the material printed with and the date you closed the bag.
# Mail to
Maker Nexus
234 E. Caribbean Drive
Sunnyvale, CA 94089
OR
Deliver to us if you are local and it does not violate the Shelter In Place Order - please do not make a special trip for this - but if you are passing by on your way to get essential groceries and want to drop it off, that is acceptable - there is a box outside our front door where donated parts can be placed.

Please be sure you are following proper sanitation procedures when you bag parts - if possible, wear gloves and a breathing mask, wipe or spray with disinfectant if available. We want to minimize the chance of cross-contamination. After it reaches MN, we will be further disinfecting them before delivering to its end destination.

We have some limited amount of 1.75mm PETg, ABS, and PLA that we can give you when you have dropped off 20 or more face shields parts. Supplies are very limited so please only take some if you need it. Just ring the door bell and ask if we have any filament in stock.

== 3D Print Directions ==

=== Materials ===

'''PETG filament Sources'''

These face shields are best done with PETG filament. A 1kg spool can make about 20 units.

* [http://matterhackers.com Matter Hackers]
** 3mm product id # MF3CF7NH 1kg about $25
** 1.75mm product id # M3MY2VQG 1kg about $24 (only $20 each if you buy 5)
** 1.75mm product id # MTVEPT25 10 pounds (4.5kg) about $185 It is a higher quality PETG filament, but is it really worth the extra cost?

'''PETG Sheet Sources'''

One 48x96 inch sheet can make about 24 shields.

* [http://www.piedmontplastics.com Piedmont Plastics] in San Leandro, CA. .020x48x96 CLR VIVAK PETG JFM about $16/sheet.

=== Instructions ===

'''Printer Settings'''

Print with '''PETG''' for ease of sanitation - IPA, Hydrogen Peroxide, Bleach, and Acetic Acid up to 10% can all be safely used with PETG.
If you don't have PETG, using '''ABS''' and '''PLA''' is also an approved option.

Print settings:
* Temperature based on filament selection.
* 3 perimeters
* 100% infill
* 0.3mm Draft settings in PrusaSlicer work fine
* we are running our Prusa's at 130% speed

=== Parts ===
We are focusing production on the Prusa RC2 headband with some modification to reduce weight and center the mounting pins, based on feedback from medical professionals.
If your printer is large enough to print this design, PLEASE switch production to that. If your printer cannot accommodate that, RC1 pieces are still helpful. See below for details on each.

==== RC2 + MakerNexus extensions (PREFERRED) ====

Most important change is that the pins are centered in the headband, so that there is something covering the shield punch, making a better seal. Also, the radii in the crevices are larger than the original to facilitate easier sanitation.

Latest release is v1.7 (2020-04-05)

The print-output will have a version number based on the github revision on it imprinted so that it is easy to see just looking at a print. Current temple imprint looks like this

https://raw.githubusercontent.com/makernexus/prusa-covid19-shield-remix/v1.7/img/version-img.png

This archive contains (next to the source files) the following files used used to print, which you also can download here:

* '''Ready-to-go GCode''': [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.7/fab/T7-PETG-Prusa.gcode T7-PETG-Prusa.gcode] (right click, download or ''save link as...'') for '''PETG''', [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.7/fab/T7-PLA-Prusa.gcode T7-PLA-Prusa.gcode] for '''PLA'''. This prints two headbands and two bottom stabilizers. Using print-speed of 130% on the Prusa seems to work fine. If you use '''ABS''', please use the files below to slice for your printer.
* '''3MF slicer project file''' [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.7/thin_shield.3mf thin_shield.3mf] This allows you to choose placement, temperatures, select which parts to print on the bed etc.
* '''slice yourself''' [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.7/fab/thin_shield_with_support.stl thin_shield_with_support.stl] (right click, download or ''save link as...''). There is also a no-support stl version in case you want to add support for the front-pins yourself in your slicer.

Also please print one [https://github.com/makernexus/prusa-covid19-shield-remix/raw/master/fab/bottom_reinforcement.stl bottom_reinforcement.stl] per headband (sometimes it is more efficient to do that separately) If you slice the version with built-in support, make sure to have 'enable thin wall detection' in your slicer. The 3mf files already have that enabled.

If your printer can't fit a headband, you can still help and print the bottom parts, stabilizing the shield plastic: Print as many [https://github.com/makernexus/prusa-covid19-shield-remix/raw/master/baseline/bottom_reinforcement.stl bottom_reinforcement.stl] that you fit on your print-bed: we need them as many people with larger print-beds focus on the headbands itself right now.

[[File:covid-headband-build-plate.png]]

More files, 3mf and STL you get directly on Github: https://github.com/makernexus/prusa-covid19-shield-remix#cut-to-the-chase-gcode-ready-to-use

== Laser Cut Parts ==

* [[:media:Wrapover-faceshield-laser.svg|The SVG file for laser cutting the shield part]] SVG File

The shields are cut from 0.020 inch thick PETG sheets. Our base design fits into sheets of 24"x32". If we get donations of larger sheets, then we cut it down before using it. We have successfully used 0.030, it is more expensive. 0.040 is too thick and will not snap onto the headband.

We tested laser cutting .015 PETG. Key takeaways: Works, but requires more cleaning. .020 is a clearly superior product, but .015 will work. The primary issue is that that lack of clear film on both surfaces results in smoke residue which can be wiped clean with typical cleaners. Mitigation - Alternative cutting process would alleviate the problem - CNC Drag knife of Vinyl Cutter may work. The thinner film results in a flexible shield more in line with disposable shield - this will likely result in fewer uses before being thrown away.

== Elastic Band ==

Each shield uses approximately 8 inches of button hole elastic, 3/4 inch wide.

Sources
* [https://www.homesew.com/ Home Sew]

== Assembly and Disassembly ==

'''Assembly'''

Assembly requires about 8" of 3/4 wide button hole elastic.

* A short video on [https://youtu.be/qKqDUExM4Q8 how to assemble the Maker Nexus face shield version RC2]

* The original design [https://www.prusaprinters.org/prints/25857-prusa-protective-face-shield-rc2 Prusa RC2 STL- On this page]

Each box of face shields contains a QR Code that links to [[Covid-19 Shield User Instructions]]

'''Disassembly for cleaning'''

These face shields can be taken apart for cleaning.

The sheets are made of PETG and can handle alcohol and UV. The head band and spreader could be made of PETG, ABS, or PLA. These all resist alcohol but are heat sensitive. We are not experts in how to sanitize equipment. You, as user, take responsibility for appropriate sanitization. See [https://help.prusa3d.com/en/article/prusa-face-shield-disinfection_125457#_ga=2.91675610.133084680.1585293016-139199844.1585293016 this page from Prusa Research] for information on sanitization methods currently being tested.

A short video on [https://www.youtube.com/watch?v=F7FFPzGeRME how to take the Maker Nexus face shield apart]

== Help at MN ==
At this time we do not need volunteers in the makerspace itself. The space is on lockdown so that we do not introduce the virus into our work area.

'''Donations Needed'''

* PETG filament is useful - if you aren't able to print yourself. Any color in both 1.75mm and 3mm diameter filament. It should be in a factory sealed box or in a bag with desiccant.
* 3/4"-1" button hole elastic
* 0.020" thick PETG film for disposable masks, sheets or rolls

You can drop-off the donations at Maker Nexus, just leave it in the box by the front door of Maker Nexus. Please use appropriate procedures when packaging - including wearing a new pair of gloves and a face mask if available.

You can also donate via PayPal towards COVID-19 efforts that Maker Nexus is working on. [http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Who to contact'''

MN members join the #covid-faceshield channel on [https://www.makernexus.com/member-dashboard Slack]

If you don't have access to Slack, please email [mailto:faceshields@makernexus.org faceshields@makernexus.org]

== External Links ==

=== Information & Discussions ===
- [https://join.slack.com/t/prusafaceshields/shared_invite/zt-cz809azp-f41jGEYZivRKWH6IcYEmKw External slack for Prusa Shield discussions]

== Status ==
As of 3/29/2020

* We have 15 3D printers at Maker Nexus and 205 printers at homes through out the community.

* We have enough 0.020/0.030 PETg sheets to make about 4000 more shields. This is hard to buy now and we are testing alternatives.

* We have enough filament to keep our printers running and are buying more. Our preferred filament is now on back order and we are sourcing directly from China.

* We are exploring injection molding for the head bands. This may take some time.

* We have shipped over 650 face shields. Yea! That is what it's all about.

3D printed face shields

2020-04-05T20:04:27Z

Hzeller: Release 1.7

[[File:Face shield front.jpg|200px]] [[File:Face shield side.jpg|350px]] [[File:Face shield top.jpg|350px]]

== Overview ==
Face shields are used by health care professionals to protect them when working with patients. Hospital supplies are running low. While they prefer to use commercially manufactured ones, in this emergency they are looking for alternative sources.

The headband portion of these shields is made on a 3D printer. If you have a 3D printer, you can make these. We have several at Maker Nexus that will be running as long as we have supplies. We deliver them to local hospitals.

* [https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform Sign up to use your own 3D printer] to help
* [https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform Sign up to receive face shields] for your health care facility

'''In the News'''

* A TV segment [https://sanfrancisco.cbslocal.com/video/4495791-maker-community-uses-3-d-printer-to-supply-ppe-to-health-professionals/ from KPIX]
* Watch a short [https://www.ktvu.com/news/covid-19-sunnyvale-company-designing-3d-protective-masks-to-meet-demand KTVU news report about our efforts.]

'''How much do they cost?'''

We give these away, paying for them from donations. We do not sell them. Promises of donations or actual donations do not affect who is prioritized to receive the PPE. The allocation team is not told who has donated. However, they cost us about $5 each to make. Donations are critical for us to be able to keep producing. We will make them until the money runs out.

[http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Is there really a need?'''

* We've heard from friends that "nurses are cutting up plastic soda bottles to make face shields, using saran wrap on top of N95 masks to allow for multi-use."
* One local nurse said they are making face shields from cut up shower curtains and hot glue guns.
* In reviewing the current design: "The nurses were over the moon about how easily the shields can be disassembled and sterilized."
* A nurse from Marin called us and I got her hooked into the allocation process and told her they were free. She started crying on the phone. - JimS

See [[Face Shield User Stories|stories from those who have received face shields from us]].

We are ramping up to make 1,000 a week, maybe more.

'''How do I get some?'''

If your health care facility needs face shields, fill in this form:

[https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform?usp=sf_link My Facility Needs Face Shields] (click the link)

A link to [[MN COVID Response|Other COVID Projects]]

== 3D Print Parts At Home ==

=== Use Your 3D Printer for good ===

'''Sign up'''

We are establishing a network of 3D printer owners who can make the headbands for us. You make them and deliver them to our facility where we do the assembly and get them to the hospitals. If you want to be part of our network, fill in this form and we will contact you:

[https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform I want to help make them]

=== What to do with the finished product ===
When you have parts ready to deliver, please follow the following steps:
# Fill out [https://docs.google.com/forms/d/e/1FAIpQLSdJfZz5M-xxQifJmFBdNQcn7c3i5eFabV7StA5ep9zsJuco9Q/viewform?usp=sf_link this form] with information about your donation (so we can track inventory)
# Seal in plastic bag.
# Label bag with your email, the version of face shield you printed (e.g. "MN 1.3" see releases in parts below; or "RC2" if you used that), the material printed with and the date you closed the bag.
# Mail to
Maker Nexus
234 E. Caribbean Drive
Sunnyvale, CA 94089
OR
Deliver to us if you are local and it does not violate the Shelter In Place Order - please do not make a special trip for this - but if you are passing by on your way to get essential groceries and want to drop it off, that is acceptable - there is a box outside our front door where donated parts can be placed.

Please be sure you are following proper sanitation procedures when you bag parts - if possible, wear gloves and a breathing mask, wipe or spray with disinfectant if available. We want to minimize the chance of cross-contamination. After it reaches MN, we will be further disinfecting them before delivering to its end destination.

We have some limited amount of 1.75mm PETg, ABS, and PLA that we can give you when you have dropped off 20 or more face shields parts. Supplies are very limited so please only take some if you need it. Just ring the door bell and ask if we have any filament in stock.

== 3D Print Directions ==

=== Materials ===

'''PETG filament Sources'''

These face shields are best done with PETG filament. A 1kg spool can make about 20 units.

* [http://matterhackers.com Matter Hackers]
** 3mm product id # MF3CF7NH 1kg about $25
** 1.75mm product id # M3MY2VQG 1kg about $24 (only $20 each if you buy 5)
** 1.75mm product id # MTVEPT25 10 pounds (4.5kg) about $185 It is a higher quality PETG filament, but is it really worth the extra cost?

'''PETG Sheet Sources'''

One 48x96 inch sheet can make about 24 shields.

* [http://www.piedmontplastics.com Piedmont Plastics] in San Leandro, CA. .020x48x96 CLR VIVAK PETG JFM about $16/sheet.

=== Instructions ===

'''Printer Settings'''

Print with '''PETG''' for ease of sanitation - IPA, Hydrogen Peroxide, Bleach, and Acetic Acid up to 10% can all be safely used with PETG.
If you don't have PETG, using '''ABS''' and '''PLA''' is also an approved option.

Print settings:
* Temperature based on filament selection.
* 3 perimeters
* 100% infill
* 0.3mm Draft settings in PrusaSlicer work fine
* we are running our Prusa's at 130% speed

=== Parts ===
We are focusing production on the Prusa RC2 headband with some modification to reduce weight and center the mounting pins, based on feedback from medical professionals.
If your printer is large enough to print this design, PLEASE switch production to that. If your printer cannot accommodate that, RC1 pieces are still helpful. See below for details on each.

==== RC2 + MakerNexus extensions (PREFERRED) ====

Most important change is that the pins are centered in the headband, so that there is something covering the shield punch, making a better seal. Also, the radii in the crevices are larger than the original to facilitate easier sanitation.

Latest release is v1.7 (2020-04-05)

The print-output will have a version number based on the github revision on it imprinted so that it is easy to see just looking at a print. Current temple imprint looks like this

https://raw.githubusercontent.com/makernexus/prusa-covid19-shield-remix/v1.7/img/version-img.png

This archive contains (next to the source files) the following files used used to print, which you also can download here:

* '''Ready-to-go GCode''': [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.7/fab/T7-PETG-Prusa.gcode T7-PETG-Prusa.gcode] (right click, download or ''save link as...'') for '''PETG''', [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.7/fab/T7-PLA-Prusa.gcode T7-PLA-Prusa.gcode] for '''PLA'''. This prints two headbands and two bottom stabilizers. Using print-speed of 130% on the Prusa seems to work fine. If you use '''ABS''', please use the files below to slice for your printer.
* '''3MF slicer project file''' [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.7/thin_shield.3mf thin_shield.3mf] This allows you to choose placement, temperatures, select which parts to print on the bed etc.
* '''slice yourself''' [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.7/fab/thin_shield_with_support.stl thin_shield_with_support.stl] (right click, download or ''save link as...''). There is also a no-support stl version in case you want to add support for the front-pins yourself in your slicer.

Also please print one [https://github.com/makernexus/prusa-covid19-shield-remix/raw/master/fab/bottom_reinforcement.stl bottom_reinforcement.stl] per headband (sometimes it is more efficient to do that separately) If you slice the version with built-in support, make sure to have 'enable thin wall detection' in your slicer. The 3mf files already have that enabled.

If your printer can't fit a headband, you can still help and print the bottom parts, stabilizing the shield plastic: Print as many [https://github.com/makernexus/prusa-covid19-shield-remix/raw/master/baseline/bottom_reinforcement.stl bottom_reinforcement.stl] that you fit on your print-bed: we need them as many people with larger print-beds focus on the headbands itself right now.

[[File:covid-headband-build-plate.png]]

More files, 3mf and STL you get directly on Github: https://github.com/makernexus/prusa-covid19-shield-remix#cut-to-the-chase-gcode-ready-to-use

==== Other Versions ====

Instead of Prusa RC2 or RC3, please use the version above, as it contains changes we got as feedback from
our local healthcare community.

We're working on a stacked version that prints reliably, but if you want/need to print stacked, as an
exception to the above, you can use the Prusa pre-arranged to print 3 at one time.
* [[:media:COVID19 SHIELD R1 3x.stl|Prusa RC1 (x3)]] STL File
For other arrangements, here's the [https://www.prusaprinters.org/prints/25857-protective-face-shield-rc1 original Prusa design page].

== Laser Cut Parts ==

* [[:media:Wrapover-faceshield-laser.svg|The SVG file for laser cutting the shield part]] SVG File

The shields are cut from 0.020 inch thick PETG sheets. Our base design fits into sheets of 24"x32". If we get donations of larger sheets, then we cut it down before using it. We have successfully used 0.030, it is more expensive. 0.040 is too thick and will not snap onto the headband.

We tested laser cutting .015 PETG. Key takeaways: Works, but requires more cleaning. .020 is a clearly superior product, but .015 will work. The primary issue is that that lack of clear film on both surfaces results in smoke residue which can be wiped clean with typical cleaners. Mitigation - Alternative cutting process would alleviate the problem - CNC Drag knife of Vinyl Cutter may work. The thinner film results in a flexible shield more in line with disposable shield - this will likely result in fewer uses before being thrown away.

== Elastic Band ==

Each shield uses approximately 8 inches of button hole elastic, 3/4 inch wide.

Sources
* [https://www.homesew.com/ Home Sew]

== Assembly and Disassembly ==

'''Assembly'''

Assembly requires about 8" of 3/4 wide button hole elastic.

* A short video on [https://youtu.be/qKqDUExM4Q8 how to assemble the Maker Nexus face shield version RC2]

* The original design [https://www.prusaprinters.org/prints/25857-prusa-protective-face-shield-rc2 Prusa RC2 STL- On this page]

Each box of face shields contains a QR Code that links to [[Covid-19 Shield User Instructions]]

'''Disassembly for cleaning'''

These face shields can be taken apart for cleaning.

The sheets are made of PETG and can handle alcohol and UV. The head band and spreader could be made of PETG, ABS, or PLA. These all resist alcohol but are heat sensitive. We are not experts in how to sanitize equipment. You, as user, take responsibility for appropriate sanitization. See [https://help.prusa3d.com/en/article/prusa-face-shield-disinfection_125457#_ga=2.91675610.133084680.1585293016-139199844.1585293016 this page from Prusa Research] for information on sanitization methods currently being tested.

A short video on [https://www.youtube.com/watch?v=F7FFPzGeRME how to take the Maker Nexus face shield apart]

== Help at MN ==
At this time we do not need volunteers in the makerspace itself. The space is on lockdown so that we do not introduce the virus into our work area.

'''Donations Needed'''

* PETG filament is useful - if you aren't able to print yourself. Any color in both 1.75mm and 3mm diameter filament. It should be in a factory sealed box or in a bag with desiccant.
* 3/4"-1" button hole elastic
* 0.020" thick PETG film for disposable masks, sheets or rolls

You can drop-off the donations at Maker Nexus, just leave it in the box by the front door of Maker Nexus. Please use appropriate procedures when packaging - including wearing a new pair of gloves and a face mask if available.

You can also donate via PayPal towards COVID-19 efforts that Maker Nexus is working on. [http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Who to contact'''

MN members join the #covid-faceshield channel on [https://www.makernexus.com/member-dashboard Slack]

If you don't have access to Slack, please email [mailto:faceshields@makernexus.org faceshields@makernexus.org]

== External Links ==

=== Information & Discussions ===
- [https://join.slack.com/t/prusafaceshields/shared_invite/zt-cz809azp-f41jGEYZivRKWH6IcYEmKw External slack for Prusa Shield discussions]

== Status ==
As of 3/29/2020

* We have 15 3D printers at Maker Nexus and 205 printers at homes through out the community.

* We have enough 0.020/0.030 PETg sheets to make about 4000 more shields. This is hard to buy now and we are testing alternatives.

* We have enough filament to keep our printers running and are buying more. Our preferred filament is now on back order and we are sourcing directly from China.

* We are exploring injection molding for the head bands. This may take some time.

* We have shipped over 650 face shields. Yea! That is what it's all about.

3D printed face shields

2020-04-04T22:33:04Z

Hzeller: Point to makernexus github

[[File:Face shield front.jpg|200px]] [[File:Face shield side.jpg|350px]] [[File:Face shield top.jpg|350px]]

== Overview ==
Face shields are used by health care professionals to protect them when working with patients. Hospital supplies are running low. While they prefer to use commercially manufactured ones, in this emergency they are looking for alternative sources.

The headband portion of these shields is made on a 3D printer. If you have a 3D printer, you can make these. We have several at Maker Nexus that will be running as long as we have supplies. We deliver them to local hospitals.

* [https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform Sign up to use your own 3D printer] to help
* [https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform Sign up to receive face shields] for your health care facility

'''In the News'''

* A TV segment [https://sanfrancisco.cbslocal.com/video/4495791-maker-community-uses-3-d-printer-to-supply-ppe-to-health-professionals/ from KPIX]
* Watch a short [https://www.ktvu.com/news/covid-19-sunnyvale-company-designing-3d-protective-masks-to-meet-demand KTVU news report about our efforts.]

'''How much do they cost?'''

We give these away, paying for them from donations. We do not sell them. Promises of donations or actual donations do not affect who is prioritized to receive the PPE. The allocation team is not told who has donated. However, they cost us about $5 each to make. Donations are critical for us to be able to keep producing. We will make them until the money runs out.

[http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Is there really a need?'''

* We've heard from friends that "nurses are cutting up plastic soda bottles to make face shields, using saran wrap on top of N95 masks to allow for multi-use."
* One local nurse said they are making face shields from cut up shower curtains and hot glue guns.
* In reviewing the current design: "The nurses were over the moon about how easily the shields can be disassembled and sterilized."
* A nurse from Marin called us and I got her hooked into the allocation process and told her they were free. She started crying on the phone. - JimS

See [[Face Shield User Stories|stories from those who have received face shields from us]].

We are ramping up to make 1,000 a week, maybe more.

'''How do I get some?'''

If your health care facility needs face shields, fill in this form:

[https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform?usp=sf_link My Facility Needs Face Shields] (click the link)

A link to [[MN COVID Response|Other COVID Projects]]

== 3D Print Parts At Home ==

=== Use Your 3D Printer for good ===

'''Sign up'''

We are establishing a network of 3D printer owners who can make the headbands for us. You make them and deliver them to our facility where we do the assembly and get them to the hospitals. If you want to be part of our network, fill in this form and we will contact you:

[https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform I want to help make them]

=== What to do with the finished product ===
When you have parts ready to deliver, please follow the following steps:
# Fill out [https://docs.google.com/forms/d/e/1FAIpQLSdJfZz5M-xxQifJmFBdNQcn7c3i5eFabV7StA5ep9zsJuco9Q/viewform?usp=sf_link this form] with information about your donation (so we can track inventory)
# Seal in plastic bag.
# Label bag with your email, the version of face shield you printed (e.g. "MN 1.3" see releases in parts below; or "RC2" if you used that), the material printed with and the date you closed the bag.
# Mail to
Maker Nexus
234 E. Caribbean Drive
Sunnyvale, CA 94089
OR
Deliver to us if you are local and it does not violate the Shelter In Place Order - please do not make a special trip for this - but if you are passing by on your way to get essential groceries and want to drop it off, that is acceptable - there is a box outside our front door where donated parts can be placed.

Please be sure you are following proper sanitation procedures when you bag parts - if possible, wear gloves and a breathing mask, wipe or spray with disinfectant if available. We want to minimize the chance of cross-contamination. After it reaches MN, we will be further disinfecting them before delivering to its end destination.

We have some limited amount of 1.75mm PETg, ABS, and PLA that we can give you when you have dropped off 20 or more face shields parts. Supplies are very limited so please only take some if you need it. Just ring the door bell and ask if we have any filament in stock.

== 3D Print Directions ==

=== Materials ===

'''PETG filament Sources'''

These face shields are best done with PETG filament. A 1kg spool can make about 20 units.

* [http://matterhackers.com Matter Hackers]
** 3mm product id # MF3CF7NH 1kg about $25
** 1.75mm product id # M3MY2VQG 1kg about $24 (only $20 each if you buy 5)
** 1.75mm product id # MTVEPT25 10 pounds (4.5kg) about $185 It is a higher quality PETG filament, but is it really worth the extra cost?

'''PETG Sheet Sources'''

One 48x96 inch sheet can make about 24 shields.

* [http://www.piedmontplastics.com Piedmont Plastics] in San Leandro, CA. .020x48x96 CLR VIVAK PETG JFM about $16/sheet.

=== Instructions ===

'''Printer Settings'''

Print with '''PETG''' for ease of sanitation - IPA, Hydrogen Peroxide, Bleach, and Acetic Acid up to 10% can all be safely used with PETG.
If you don't have PETG, using '''ABS''' and '''PLA''' is also an approved option.

Print settings:
* Temperature based on filament selection.
* 3 perimeters
* 100% infill
* 0.3mm Draft settings in PrusaSlicer work fine
* we are running our Prusa's at 130% speed

=== Parts ===
We are focusing production on the Prusa RC2 headband with some modification to reduce weight and center the mounting pins, based on feedback from medical professionals.
If your printer is large enough to print this design, PLEASE switch production to that. If your printer cannot accommodate that, RC1 pieces are still helpful. See below for details on each.

==== RC2 + MakerNexus extensions (PREFERRED) ====

The MakerNexus modifications [https://github.com/makernexus/prusa-covid19-shield-remix are on github].

Most important change is that the pins are centered in the headband, so that there is something covering the shield punch, making a better seal. Also, the radii in the crevices are larger than the original to facilitate easier sanitation.

Easiest is to download the release at https://github.com/makernexus/prusa-covid19-shield-remix/releases (latest is v1.6 from 2020-04-04)

The print-output will have a version number based on the github revision on it imprinted so that it is easy to see just looking at a print. Current temple imprint looks like this

https://raw.githubusercontent.com/makernexus/prusa-covid19-shield-remix/v1.6/img/version-img.png

This archive contains (next to the source files) the following files used used to print, which you also can download here:

* '''Ready-to-go GCode''': [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.6/fab/thin_shield_0.3mm_PETG_MK3S.gcode thin_shield_0.3mm_PETG_MK3S.gcode] (right click, download or ''save link as...'') for '''PETG''' (preferred), [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.6/fab/normal_shield_0.3mm_PLA_MK3S.gcode normal_shield_0.3mm_PLA_MK3S.gcode] for '''PLA''' (if that's all you have). This prints two headbands and two bottom stabilizers. Using print-speed of 130% on the Prusa seems to work fine. If you use '''ABS''', please use the files below to slice for your printer.
* '''3MF slicer project file''' [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.6/thin_shield.3mf thin_shield.3mf] and [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.6//normal_shield.3mf normal_shield.3mf]. This allows you to choose placement, temperatures etc.
* '''slice yourself''' [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.6/fab/thin_shield_with_support.stl thin_shield_with_support.stl] (right click, download or ''save link as...'') Recommended for '''PETG''' and [https://github.com/makernexus/prusa-covid19-shield-remix/raw/v1.6/fab/normal_shield_with_support.stl normal_shield_with_support.stl] recommended for '''PLA'''. Also please also print one [https://github.com/makernexus/prusa-covid19-shield-remix/raw/master/baseline/bottom_reinforcement.stl bottom_reinforcement.stl] per headband (sometimes it is more efficient to do that separately) If you slice the version with built-in support, make sure to have 'enable thin wall detection' in your slicer. The 3mf files already have that enabled.

[[File:covid-headband-build-plate.png]]

More files, 3mf and STL you get directly on Github: https://github.com/makernexus/prusa-covid19-shield-remix#cut-to-the-chase-gcode-ready-to-use

If your printer can't fit faceshield, you can still help and print the bottom parts, stabilizing the shield plastic: Print as many [https://github.com/makernexus/prusa-covid19-shield-remix/raw/master/baseline/bottom_reinforcement.stl bottom_reinforcement.stl] that you fit on your print-bed: we need them as many people with larger print-beds focus on the headbands itself right now.

==== Other Versions ====

Instead of Prusa RC2 or RC3, please use the version above, as it contains changes we got as feedback from
our local healthcare community.

We're working on a stacked version that prints reliably, but if you want/need to print stacked, as an
exception to the above, you can use the Prusa pre-arranged to print 3 at one time.
* [[:media:COVID19 SHIELD R1 3x.stl|Prusa RC1 (x3)]] STL File
For other arrangements, here's the [https://www.prusaprinters.org/prints/25857-protective-face-shield-rc1 original Prusa design page].

== Laser Cut Parts ==

* [[:media:Wrapover-faceshield-laser.svg|The SVG file for laser cutting the shield part]] SVG File

The shields are cut from 0.020 inch thick PETG sheets. Our base design fits into sheets of 24"x32". If we get donations of larger sheets, then we cut it down before using it.

== Elastic Band ==

Each shield uses approximately 8 inches of button hole elastic, 3/4 inch wide.

Sources
* [https://www.homesew.com/ Home Sew]

== Assembly and Disassembly ==

'''Assembly'''

Assembly requires about 8" of 3/4 wide button hole elastic.

* A short video on [https://youtu.be/qKqDUExM4Q8 how to assemble the Maker Nexus face shield version RC2]

* The original design [https://www.prusaprinters.org/prints/25857-prusa-protective-face-shield-rc2 Prusa RC2 STL- On this page]

Each box of face shields contains a QR Code that links to [[Covid-19 Shield User Instructions]]

'''Disassembly for cleaning'''

These face shields can be taken apart for cleaning.

The sheets are made of PETG and can handle alcohol and UV. The head band and spreader could be made of PETG, ABS, or PLA. These all resist alcohol but are heat sensitive. We are not experts in how to sanitize equipment. You, as user, take responsibility for appropriate sanitization. See [https://help.prusa3d.com/en/article/prusa-face-shield-disinfection_125457#_ga=2.91675610.133084680.1585293016-139199844.1585293016 this page from Prusa Research] for information on sanitization methods currently being tested.

A short video on [https://www.youtube.com/watch?v=F7FFPzGeRME how to take the Maker Nexus face shield apart]

== Help at MN ==
At this time we do not need volunteers in the makerspace itself. The space is on lockdown so that we do not introduce the virus into our work area.

'''Donations Needed'''

* PETG filament is useful - if you aren't able to print yourself. Any color in both 1.75mm and 3mm diameter filament. It should be in a factory sealed box or in a bag with desiccant.
* 3/4"-1" button hole elastic
* 0.020" thick PETG film for disposable masks, sheets or rolls

You can drop-off the donations at Maker Nexus, just leave it in the box by the front door of Maker Nexus. Please use appropriate procedures when packaging - including wearing a new pair of gloves and a face mask if available.

You can also donate via PayPal towards COVID-19 efforts that Maker Nexus is working on. [http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Who to contact'''

MN members join the #covid-faceshield channel on [https://www.makernexus.com/member-dashboard Slack]

If you don't have access to Slack, please email [mailto:faceshields@makernexus.org faceshields@makernexus.org]

== External Links ==

=== Information & Discussions ===
- [https://join.slack.com/t/prusafaceshields/shared_invite/zt-cz809azp-f41jGEYZivRKWH6IcYEmKw External slack for Prusa Shield discussions]

== Status ==
As of 3/29/2020

* We have 15 3D printers at Maker Nexus and 205 printers at homes through out the community.

* We have enough 0.020/0.030 PETg sheets to make about 4000 more shields. This is hard to buy now and we are testing alternatives.

* We have enough filament to keep our printers running and are buying more. Our preferred filament is now on back order and we are sourcing directly from China.

* We are exploring injection molding for the head bands. This may take some time.

* We have shipped over 650 face shields. Yea! That is what it's all about.

3D printed face shields

2020-04-04T18:11:08Z

Hzeller: -> Version 1.6

[[File:Face shield front.jpg|200px]] [[File:Face shield side.jpg|350px]] [[File:Face shield top.jpg|350px]]

== Overview ==
Face shields are used by health care professionals to protect them when working with patients. Hospital supplies are running low. While they prefer to use commercially manufactured ones, in this emergency they are looking for alternative sources.

The headband portion of these shields is made on a 3D printer. If you have a 3D printer, you can make these. We have several at Maker Nexus that will be running as long as we have supplies. We deliver them to local hospitals.

* [https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform Sign up to use your own 3D printer] to help
* [https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform Sign up to receive face shields] for your health care facility

'''In the News'''

* A TV segment [https://sanfrancisco.cbslocal.com/video/4495791-maker-community-uses-3-d-printer-to-supply-ppe-to-health-professionals/ from KPIX]
* Watch a short [https://www.ktvu.com/news/covid-19-sunnyvale-company-designing-3d-protective-masks-to-meet-demand KTVU news report about our efforts.]

'''How much do they cost?'''

We give these away, paying for them from donations. We do not sell them. Promises of donations or actual donations do not affect who is prioritized to receive the PPE. The allocation team is not told who has donated. However, they cost us about $5 each to make. Donations are critical for us to be able to keep producing. We will make them until the money runs out.

[http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Is there really a need?'''

* We've heard from friends that "nurses are cutting up plastic soda bottles to make face shields, using saran wrap on top of N95 masks to allow for multi-use."
* One local nurse said they are making face shields from cut up shower curtains and hot glue guns.
* In reviewing the current design: "The nurses were over the moon about how easily the shields can be disassembled and sterilized."
* A nurse from Marin called us and I got her hooked into the allocation process and told her they were free. She started crying on the phone. - JimS

See [[Face Shield User Stories|stories from those who have received face shields from us]].

We are ramping up to make 1,000 a week, maybe more.

'''How do I get some?'''

If your health care facility needs face shields, fill in this form:

[https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform?usp=sf_link My Facility Needs Face Shields] (click the link)

A link to [[MN COVID Response|Other COVID Projects]]

== 3D Print Parts At Home ==

=== Use Your 3D Printer for good ===

'''Sign up'''

We are establishing a network of 3D printer owners who can make the headbands for us. You make them and deliver them to our facility where we do the assembly and get them to the hospitals. If you want to be part of our network, fill in this form and we will contact you:

[https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform I want to help make them]

=== What to do with the finished product ===
When you have parts ready to deliver, please follow the following steps:
# Fill out [https://docs.google.com/forms/d/e/1FAIpQLSdJfZz5M-xxQifJmFBdNQcn7c3i5eFabV7StA5ep9zsJuco9Q/viewform?usp=sf_link this form] with information about your donation (so we can track inventory)
# Seal in plastic bag.
# Label bag with your email, the version of face shield you printed (e.g. "MN 1.3" see releases in parts below; or "RC2" if you used that), the material printed with and the date you closed the bag.
# Mail to
Maker Nexus
234 E. Caribbean Drive
Sunnyvale, CA 94089
OR
Deliver to us if you are local and it does not violate the Shelter In Place Order - please do not make a special trip for this - but if you are passing by on your way to get essential groceries and want to drop it off, that is acceptable - there is a box outside our front door where donated parts can be placed.

Please be sure you are following proper sanitation procedures when you bag parts - if possible, wear gloves and a breathing mask, wipe or spray with disinfectant if available. We want to minimize the chance of cross-contamination. After it reaches MN, we will be further disinfecting them before delivering to its end destination.

We have some limited amount of 1.75mm PETg, ABS, and PLA that we can give you when you have dropped off 20 or more face shields parts. Supplies are very limited so please only take some if you need it. Just ring the door bell and ask if we have any filament in stock.

== 3D Print Directions ==

=== Materials ===

'''PETG filament Sources'''

These face shields are best done with PETG filament. A 1kg spool can make about 20 units.

* [http://matterhackers.com Matter Hackers]
** 3mm product id # MF3CF7NH 1kg about $25
** 1.75mm product id # M3MY2VQG 1kg about $24 (only $20 each if you buy 5)
** 1.75mm product id # MTVEPT25 10 pounds (4.5kg) about $185 It is a higher quality PETG filament, but is it really worth the extra cost?

'''PETG Sheet Sources'''

One 48x96 inch sheet can make about 24 shields.

* [http://www.piedmontplastics.com Piedmont Plastics] in San Leandro, CA. .020x48x96 CLR VIVAK PETG JFM about $16/sheet.

=== Instructions ===

'''Printer Settings'''

Print with '''PETG''' for ease of sanitation - IPA, Hydrogen Peroxide, Bleach, and Acetic Acid up to 10% can all be safely used with PETG.
If you don't have PETG, using '''ABS''' and '''PLA''' is also an approved option.

Print settings:
* Temperature based on filament selection.
* 3 perimeters
* 100% infill
* 0.3mm Draft settings in PrusaSlicer work fine
* we are running our Prusa's at 130% speed

=== Parts ===
We are focusing production on the Prusa RC2 headband with some modification to reduce weight and center the mounting pins, based on feedback from medical professionals.
If your printer is large enough to print this design, PLEASE switch production to that. If your printer cannot accommodate that, RC1 pieces are still helpful. See below for details on each.

==== RC2 + MakerNexus extensions (PREFERRED) ====

The MakerNexus modifications [https://github.com/hzeller/prusa-covid19-shield-remix are on github].

Most important change is that the pins are centered in the headband, so that there is something covering the shield punch, making a better seal. Also, the radii in the crevices are larger than the original to facilitate easier sanitation.

Easiest is to download the release at https://github.com/hzeller/prusa-covid19-shield-remix/releases (latest is v1.6 from 2020-04-04)

The print-output will have a version number based on the github revision on it imprinted so that it is easy to see just looking at a print. Current temple imprint looks like this

https://raw.githubusercontent.com/hzeller/prusa-covid19-shield-remix/v1.6/img/version-img.png

This archive contains (next to the source files) the following files used used to print, which you also can download here:

* '''Ready-to-go GCode''': [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.6/fab/thin_shield_0.3mm_PETG_MK3S.gcode thin_shield_0.3mm_PETG_MK3S.gcode] (right click, download or ''save link as...'') for '''PETG''' (preferred), [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.6/fab/normal_shield_0.3mm_PLA_MK3S.gcode normal_shield_0.3mm_PLA_MK3S.gcode] for '''PLA''' (if that's all you have). This prints two headbands and two bottom stabilizers. Using print-speed of 130% on the Prusa seems to work fine. If you use '''ABS''', please use the files below to slice for your printer.
* '''3MF slicer project file''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.6/thin_shield.3mf thin_shield.3mf] and [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.6//normal_shield.3mf normal_shield.3mf]. This allows you to choose placement, temperatures etc.
* '''slice yourself''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.6/fab/thin_shield_with_support.stl thin_shield_with_support.stl] (right click, download or ''save link as...'') Recommended for '''PETG''' and [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.6/fab/normal_shield_with_support.stl normal_shield_with_support.stl] recommended for '''PLA'''. Also please also print one [https://github.com/hzeller/prusa-covid19-shield-remix/raw/master/baseline/bottom_reinforcement.stl bottom_reinforcement.stl] per headband (sometimes it is more efficient to do that separately) If you slice the version with built-in support, make sure to have 'enable thin wall detection' in your slicer. The 3mf files already have that enabled.

[[File:covid-headband-build-plate.png]]

More files, 3mf and STL you get directly on Github: https://github.com/hzeller/prusa-covid19-shield-remix#cut-to-the-chase-gcode-ready-to-use

If your printer can't fit faceshield, you can still help and print the bottom parts, stabilizing the shield plastic: Print as many [https://github.com/hzeller/prusa-covid19-shield-remix/raw/master/baseline/bottom_reinforcement.stl bottom_reinforcement.stl] that you fit on your print-bed: we need them as many people with larger print-beds focus on the headbands itself right now.

==== Other Versions ====

Instead of Prusa RC2 or RC3, please use the version above, as it contains changes we got as feedback from
our local healthcare community.

We're working on a stacked version that prints reliably, but if you want/need to print stacked, as an
exception to the above, you can use the Prusa pre-arranged to print 3 at one time.
* [[:media:COVID19 SHIELD R1 3x.stl|Prusa RC1 (x3)]] STL File
For other arrangements, here's the [https://www.prusaprinters.org/prints/25857-protective-face-shield-rc1 original Prusa design page].

== Laser Cut Parts ==

* [[:media:Wrapover-faceshield-laser.svg|The SVG file for laser cutting the shield part]] SVG File

The shields are cut from 0.020 inch thick PETG sheets. Our base design fits into sheets of 24"x32". If we get donations of larger sheets, then we cut it down before using it.

== Elastic Band ==

Each shield uses approximately 8 inches of button hole elastic, 3/4 inch wide.

Sources
* [https://www.homesew.com/ Home Sew]

== Assembly and Disassembly ==

'''Assembly'''

Assembly requires about 8" of 3/4 wide button hole elastic.

* A short video on [https://youtu.be/qKqDUExM4Q8 how to assemble the Maker Nexus face shield version RC2]

* The original design [https://www.prusaprinters.org/prints/25857-prusa-protective-face-shield-rc2 Prusa RC2 STL- On this page]

Each box of face shields contains a QR Code that links to [[Covid-19 Shield User Instructions]]

'''Disassembly for cleaning'''

These face shields can be taken apart for cleaning.

The sheets are made of PETG and can handle alcohol and UV. The head band and spreader could be made of PETG, ABS, or PLA. These all resist alcohol but are heat sensitive. We are not experts in how to sanitize equipment. You, as user, take responsibility for appropriate sanitization. See [https://help.prusa3d.com/en/article/prusa-face-shield-disinfection_125457#_ga=2.91675610.133084680.1585293016-139199844.1585293016 this page from Prusa Research] for information on sanitization methods currently being tested.

A short video on [https://www.youtube.com/watch?v=F7FFPzGeRME how to take the Maker Nexus face shield apart]

== Help at MN ==
At this time we do not need volunteers in the makerspace itself. The space is on lockdown so that we do not introduce the virus into our work area.

'''Donations Needed'''

* PETG filament is useful - if you aren't able to print yourself. Any color in both 1.75mm and 3mm diameter filament. It should be in a factory sealed box or in a bag with desiccant.
* 3/4"-1" button hole elastic
* 0.020" thick PETG film for disposable masks, sheets or rolls

You can drop-off the donations at Maker Nexus, just leave it in the box by the front door of Maker Nexus. Please use appropriate procedures when packaging - including wearing a new pair of gloves and a face mask if available.

You can also donate via PayPal towards COVID-19 efforts that Maker Nexus is working on. [http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Who to contact'''

MN members join the #covid-faceshield channel on [https://www.makernexus.com/member-dashboard Slack]

If you don't have access to Slack, please email [mailto:faceshields@makernexus.org faceshields@makernexus.org]

== External Links ==

=== Information & Discussions ===
- [https://join.slack.com/t/prusafaceshields/shared_invite/zt-cz809azp-f41jGEYZivRKWH6IcYEmKw External slack for Prusa Shield discussions]

== Status ==
As of 3/29/2020

* We have 15 3D printers at Maker Nexus and 205 printers at homes through out the community.

* We have enough 0.020/0.030 PETg sheets to make about 4000 more shields. This is hard to buy now and we are testing alternatives.

* We have enough filament to keep our printers running and are buying more. Our preferred filament is now on back order and we are sourcing directly from China.

* We are exploring injection molding for the head bands. This may take some time.

* We have shipped over 650 face shields. Yea! That is what it's all about.

Test junk

2020-04-01T15:57:05Z

Hzeller:

20200401

Test to see if we can display an image directly from Henner's github account.

This should show:

https://raw.githubusercontent.com/hzeller/prusa-covid19-shield-remix/master/img/version-img.png

This picture from another domain should not

https://static.wixstatic.com/media/85a375_7559972cf01f406da12b19f545f36efa~mv2.png/v1/fill/w_122,h_118,al_c,q_85,usm_0.66_1.00_0.01/85a375_7559972cf01f406da12b19f545f36efa~mv2.webp

3D printed face shields

2020-04-01T14:21:55Z

Hzeller: Link to temple imprint.

[[File:Face shield front.jpg|200px]] [[File:Face shield side.jpg|350px]] [[File:Face shield top.jpg|350px]]

== Overview ==
Face shields are used by health care professionals to protect them when working with patients. Hospital supplies are running low. While they prefer to use commercially manufactured ones, in this emergency they are looking for alternative sources.

The headband portion of these shields is made on a 3D printer. If you have a 3D printer, you can make these. We have several at Maker Nexus that will be running as long as we have supplies. We deliver them to local hospitals.

* [https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform Sign up to use your own 3D printer] to help
* [https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform Sign up to receive face shields] for your health care facility

'''In the News'''

* A TV segment [https://sanfrancisco.cbslocal.com/video/4495791-maker-community-uses-3-d-printer-to-supply-ppe-to-health-professionals/ from KPIX]
* Watch a short [https://www.ktvu.com/news/covid-19-sunnyvale-company-designing-3d-protective-masks-to-meet-demand KTVU news report about our efforts.]

'''How much do they cost?'''

We give these away, paying for them from donations. We do not sell them. Promises of donations or actual donations do not affect who is prioritized to receive the PPE. The allocation team is not told who has donated. However, they cost us about $5 each to make. Donations are critical for us to be able to keep producing. We will make them until the money runs out.

[http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Is there really a need?'''

* We've heard from friends that "nurses are cutting up plastic soda bottles to make face shields, using saran wrap on top of N95 masks to allow for multi-use."
* One local nurse said they are making face shields from cut up shower curtains and hot glue guns.
* In reviewing the current design: "The nurses were over the moon about how easily the shields can be disassembled and sterilized."
* A nurse from Marin called us and I got her hooked into the allocation process and told her they were free. She started crying on the phone. - JimS

We are ramping up to make 1,000 a week, maybe more.

'''How do I get some?'''

If your health care facility needs face shields, fill in this form:

[https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform?usp=sf_link My Facility Needs Face Shields] (click the link)

A link to [[MN COVID Response|Other COVID Projects]]

== 3D Print Parts At Home ==

=== Use Your 3D Printer for good ===

'''Sign up'''

We are establishing a network of 3D printer owners who can make the headbands for us. You make them and deliver them to our facility where we do the assembly and get them to the hospitals. If you want to be part of our network, fill in this form and we will contact you:

[https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform I want to help make them]

=== What to do with the finished product ===
When you have parts ready to deliver, please follow the following steps:
# Fill out [https://docs.google.com/forms/d/e/1FAIpQLSdJfZz5M-xxQifJmFBdNQcn7c3i5eFabV7StA5ep9zsJuco9Q/viewform?usp=sf_link this form] with information about your donation (so we can track inventory)
# Seal in plastic bag.
# Label bag with your email, the version of face shield you printed (e.g. "MN 1.3" see releases in parts below; or "RC2" if you used that), the material printed with and the date you closed the bag.
# Mail to
Maker Nexus
234 E. Caribbean Drive
Sunnyvale, CA 94089
OR
Deliver to us if you are local and it does not violate the Shelter In Place Order - please do not make a special trip for this - but if you are passing by on your way to get essential groceries and want to drop it off, that is acceptable - there is a box outside our front door where donated parts can be placed.

Please be sure you are following proper sanitation procedures when you bag parts - if possible, wear gloves and a breathing mask, wipe or spray with disinfectant if available. We want to minimize the chance of cross-contamination. After it reaches MN, we will be further disinfecting them before delivering to its end destination.

We have some limited amount of 1.75mm PETg, ABS, and PLA that we can give you when you have dropped off 20 or more face shields parts. Supplies are very limited so please only take some if you need it. Just ring the door bell and ask if we have any filament in stock.

== 3D Print Directions ==

=== Materials ===

'''PETG filament Sources'''

These face shields are best done with PETG filament. A 1kg spool can make about 20 units.

* [http://matterhackers.com Matter Hackers]
** 3mm product id # MF3CF7NH 1kg about $25
** 1.75mm product id # M3MY2VQG 1kg about $24 (only $20 each if you buy 5)
** 1.75mm product id # MTVEPT25 10 pounds (4.5kg) about $185 It is a higher quality PETG filament, but is it really worth the extra cost?

'''PETG Sheet Sources'''

One 48x96 inch sheet can make about 24 shields.

* [http://www.piedmontplastics.com Piedmont Plastics] in San Leandro, CA. .020x48x96 CLR VIVAK PETG JFM about $16/sheet.

=== Instructions ===

'''Printer Settings'''

Print with '''PETG''' for ease of sanitation - IPA, Hydrogen Peroxide, Bleach, and Acetic Acid up to 10% can all be safely used with PETG.
If you don't have PETG, using '''ABS''' and '''PLA''' is also an approved option.

Print settings:
* Temperature based on filament selection.
* 3 perimeters
* 100% infill
* 0.3mm Draft settings in PrusaSlicer work fine
* we are running our Prusa's at 130% speed

=== Parts ===
We are focusing production on the Prusa RC2 headband with some modification to reduce weight and center the mounting pins, based on feedback from medical professionals.
If your printer is large enough to print this design, PLEASE switch production to that. If your printer cannot accommodate that, RC1 pieces are still helpful. See below for details on each.

==== RC2 + MakerNexus extensions (PREFERRED) ====

The MakerNexus modifications [https://github.com/hzeller/prusa-covid19-shield-remix are on github].

Most important change is that the pins are centered in the headband, so that there is something covering the shield punch, making a better seal. Also, the radii in the crevices are larger than the original to facilitate easier sanitation.

Easiest is to download the release at https://github.com/hzeller/prusa-covid19-shield-remix/releases (latest is v1.5 from 2020-03-31)

The print-output will have a version number based on the github revision on it imprinted so that it is easy to see just looking at a print. Current temple imprint looks like this

https://raw.githubusercontent.com/hzeller/prusa-covid19-shield-remix/master/img/version-img.png

This archive contains (next to the source files) the following files used used to print, which you also can download here:

* '''Ready-to-go GCode''': [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.5/fab/thin_shield_0.3mm_PETG_MK3S.gcode thin_shield_0.3mm_PETG_MK3S.gcode] (right click, download or ''save link as...'') for '''PETG''' (preferred), [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.5/fab/normal_shield_0.3mm_PLA_MK3S.gcode normal_shield_0.3mm_PLA_MK3S.gcode] for '''PLA''' (if that's all you have). This prints two headbands and two bottom stabilizers. Using print-speed of 130% on the Prusa seems to work fine. If you use '''ABS''', please use the files below to slice for your printer.
* '''3MF slicer project file''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.5/thin_shield.3mf thin_shield.3mf] and [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.5//normal_shield.3mf normal_shield.3mf]. This allows you to choose placement, temperatures etc.
* '''slice yourself''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.5/fab/thin_shield_with_support.stl thin_shield_with_support.stl] (right click, download or ''save link as...'') Recommended for '''PETG''' and [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.5/fab/normal_shield_with_support.stl normal_shield_with_support.stl] recommended for '''PLA'''. Also please also print one [https://github.com/hzeller/prusa-covid19-shield-remix/raw/master/baseline/bottom_reinforcement.stl bottom_reinforcement.stl] per headband (sometimes it is more efficient to do that separately) If you slice the version with built-in support, make sure to have 'enable thin wall detection' in your slicer. The 3mf files already have that enabled.

[[File:covid-headband-build-plate.png]]

More files, 3mf and STL you get directly on Github: https://github.com/hzeller/prusa-covid19-shield-remix#cut-to-the-chase-gcode-ready-to-use

If your printer can't fit faceshield, you can still help and print the bottom parts, stabilizing the shield plastic: Print as many [https://github.com/hzeller/prusa-covid19-shield-remix/raw/master/baseline/bottom_reinforcement.stl bottom_reinforcement.stl] that you fit on your print-bed: we need them as many people with larger print-beds focus on the headbands itself right now.

==== Other Versions ====

Instead of Prusa RC2 or RC3, please use the version above, as it contains changes we got as feedback from
our local healthcare community.

We're working on a stacked version that prints reliably, but if you want/need to print stacked, as an
exception to the above, you can use the Prusa pre-arranged to print 3 at one time.
* [[:media:COVID19 SHIELD R1 3x.stl|Prusa RC1 (x3)]] STL File
For other arrangements, here's the [https://www.prusaprinters.org/prints/25857-protective-face-shield-rc1 original Prusa design page].

== Laser Cut Parts ==

* [[:media:Wrapover-faceshield-laser.svg|The SVG file for laser cutting the shield part]] SVG File

The shields are cut from 0.020 inch thick PETG sheets. Our base design fits into sheets of 24"x32". If we get donations of larger sheets, then we cut it down before using it.

== Elastic Band ==

Each shield uses approximately 8 inches of button hole elastic, 3/4 inch wide.

Sources
* [https://www.homesew.com/ Home Sew]

== Assembly and Disassembly ==

'''Assembly'''

Assembly requires about 8" of 3/4 wide button hole elastic.

* A short video on [https://youtu.be/qKqDUExM4Q8 how to assemble the Maker Nexus face shield version RC2]

* The original design [https://www.prusaprinters.org/prints/25857-prusa-protective-face-shield-rc2 Prusa RC2 STL- On this page]

Each box of face shields contains a QR Code that links to [[Covid-19 Shield User Instructions]]

'''Disassembly for cleaning'''

These face shields can be taken apart for cleaning.

The sheets are made of PETG and can handle alcohol and UV. The head band and spreader could be made of PETG, ABS, or PLA. These all resist alcohol but are heat sensitive. We are not experts in how to sanitize equipment. You, as user, take responsibility for appropriate sanitization. See [https://help.prusa3d.com/en/article/prusa-face-shield-disinfection_125457#_ga=2.91675610.133084680.1585293016-139199844.1585293016 this page from Prusa Research] for information on sanitization methods currently being tested.

A short video on [https://www.youtube.com/watch?v=F7FFPzGeRME how to take the Maker Nexus face shield apart]

== Help at MN ==
At this time we do not need volunteers in the makerspace itself. The space is on lockdown so that we do not introduce the virus into our work area.

'''Donations Needed'''

* PETG filament is useful - if you aren't able to print yourself. Any color in both 1.75mm and 3mm diameter filament. It should be in a factory sealed box or in a bag with desiccant.
* 3/4"-1" button hole elastic
* 0.020" thick PETG film for disposable masks, sheets or rolls

You can drop-off the donations at Maker Nexus, just leave it in the box by the front door of Maker Nexus. Please use appropriate procedures when packaging - including wearing a new pair of gloves and a face mask if available.

You can also donate via PayPal towards COVID-19 efforts that Maker Nexus is working on. [http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Who to contact'''

MN members join the #covid-faceshield channel on [https://www.makernexus.com/member-dashboard Slack]

If you don't have access to Slack, please email [mailto:faceshields@makernexus.org faceshields@makernexus.org]

== External Links ==

=== Information & Discussions ===
- [https://join.slack.com/t/prusafaceshields/shared_invite/zt-cz809azp-f41jGEYZivRKWH6IcYEmKw External slack for Prusa Shield discussions]

== Status ==
As of 3/29/2020

* We have 15 3D printers at Maker Nexus and 205 printers at homes through out the community.

* We have enough 0.020/0.030 PETg sheets to make about 4000 more shields. This is hard to buy now and we are testing alternatives.

* We have enough filament to keep our printers running and are buying more. Our preferred filament is now on back order and we are sourcing directly from China.

* We are exploring injection molding for the head bands. This may take some time.

* We have shipped over 650 face shields. Yea! That is what it's all about.

3D printed face shields

2020-04-01T05:32:31Z

Hzeller: Describe more changes since RC2

[[File:Face shield front.jpg|200px]] [[File:Face shield side.jpg|350px]] [[File:Face shield top.jpg|350px]]

== Overview ==
Face shields are used by health care professionals to protect them when working with patients. Hospital supplies are running low. While they prefer to use commercially manufactured ones, in this emergency they are looking for alternative sources.

The headband portion of these shields is made on a 3D printer. If you have a 3D printer, you can make these. We have several at Maker Nexus that will be running as long as we have supplies. We deliver them to local hospitals.

* [https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform Sign up to use your own 3D printer] to help
* [https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform Sign up to receive face shields] for your health care facility

'''In the News'''

* A TV segment [https://sanfrancisco.cbslocal.com/video/4495791-maker-community-uses-3-d-printer-to-supply-ppe-to-health-professionals/ from KPIX]
* Watch a short [https://www.ktvu.com/news/covid-19-sunnyvale-company-designing-3d-protective-masks-to-meet-demand KTVU news report about our efforts.]

'''How much do they cost?'''

We give these away, paying for them from donations. We do not sell them. Promises of donations or actual donations do not affect who is prioritized to receive the PPE. The allocation team is not told who has donated. However, they cost us about $5 each to make. Donations are critical for us to be able to keep producing. We will make them until the money runs out.

[http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Is there really a need?'''

* We've heard from friends that "nurses are cutting up plastic soda bottles to make face shields, using saran wrap on top of N95 masks to allow for multi-use."
* One local nurse said they are making face shields from cut up shower curtains and hot glue guns.
* In reviewing the current design: "The nurses were over the moon about how easily the shields can be disassembled and sterilized."
* A nurse from Marin called us and I got her hooked into the allocation process and told her they were free. She started crying on the phone. - JimS

We are ramping up to make 1,000 a week, maybe more.

'''How do I get some?'''

If your health care facility needs face shields, fill in this form:

[https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform?usp=sf_link My Facility Needs Face Shields] (click the link)

A link to [[MN COVID Response|Other COVID Projects]]

== 3D Print Parts At Home ==

=== Use Your 3D Printer for good ===

'''Sign up'''

We are establishing a network of 3D printer owners who can make the headbands for us. You make them and deliver them to our facility where we do the assembly and get them to the hospitals. If you want to be part of our network, fill in this form and we will contact you:

[https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform I want to help make them]

=== What to do with the finished product ===
When you have parts ready to deliver, please follow the following steps:
# Fill out [https://docs.google.com/forms/d/e/1FAIpQLSdJfZz5M-xxQifJmFBdNQcn7c3i5eFabV7StA5ep9zsJuco9Q/viewform?usp=sf_link this form] with information about your donation (so we can track inventory)
# Seal in plastic bag.
# Label bag with your email, the version of face shield you printed (e.g. "MN 1.3" see releases in parts below; or "RC2" if you used that), the material printed with and the date you closed the bag.
# Mail to
Maker Nexus
234 E. Caribbean Drive
Sunnyvale, CA 94089
OR
Deliver to us if you are local and it does not violate the Shelter In Place Order - please do not make a special trip for this - but if you are passing by on your way to get essential groceries and want to drop it off, that is acceptable - there is a box outside our front door where donated parts can be placed.

Please be sure you are following proper sanitation procedures when you bag parts - if possible, wear gloves and a breathing mask, wipe or spray with disinfectant if available. We want to minimize the chance of cross-contamination. After it reaches MN, we will be further disinfecting them before delivering to its end destination.

We have some limited amount of 1.75mm PETg, ABS, and PLA that we can give you when you have dropped off 20 or more face shields parts. Supplies are very limited so please only take some if you need it. Just ring the door bell and ask if we have any filament in stock.

== 3D Print Directions ==

=== Materials ===

'''PETG filament Sources'''

These face shields are best done with PETG filament. A 1kg spool can make about 20 units.

* [http://matterhackers.com Matter Hackers]
** 3mm product id # MF3CF7NH 1kg about $25
** 1.75mm product id # M3MY2VQG 1kg about $24 (only $20 each if you buy 5)
** 1.75mm product id # MTVEPT25 10 pounds (4.5kg) about $185 It is a higher quality PETG filament, but is it really worth the extra cost?

'''PETG Sheet Sources'''

One 48x96 inch sheet can make about 24 shields.

* [http://www.piedmontplastics.com Piedmont Plastics] in San Leandro, CA. .020x48x96 CLR VIVAK PETG JFM about $16/sheet.

=== Instructions ===

'''Printer Settings'''

Print with '''PETG''' for ease of sanitation - IPA, Hydrogen Peroxide, Bleach, and Acetic Acid up to 10% can all be safely used with PETG.
If you don't have PETG, using '''ABS''' and '''PLA''' is also an approved option.

Print settings:
* Temperature based on filament selection.
* 3 perimeters
* 100% infill
* 0.3mm Draft settings in PrusaSlicer work fine
* we are running our Prusa's at 130% speed

=== Parts ===
We are focusing production on the Prusa RC2 headband with some modification to reduce weight and center the mounting pins, based on feedback from medical professionals.
If your printer is large enough to print this design, PLEASE switch production to that. If your printer cannot accommodate that, RC1 pieces are still helpful. See below for details on each.

==== RC2 + MakerNexus extensions (PREFERRED) ====

The MakerNexus modifications [https://github.com/hzeller/prusa-covid19-shield-remix are on github].

Most important change is that the pins are centered in the headband, so that there is something covering the shield punch, making a better seal. Also, the radii in the crevices are larger than the original to facilitate easier sanitation.

Easiest is to download the release at https://github.com/hzeller/prusa-covid19-shield-remix/releases (latest is v1.5 from 2020-03-31)

This archive contains (next to the source files) the following files used used to print, which you also can download here:

* '''Ready-to-go GCode''': [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.5/fab/thin_shield_0.3mm_PETG_MK3S.gcode thin_shield_0.3mm_PETG_MK3S.gcode] (right click, download or ''save link as...'') for '''PETG''' (preferred), [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.5/fab/normal_shield_0.3mm_PLA_MK3S.gcode normal_shield_0.3mm_PLA_MK3S.gcode] for '''PLA''' (if that's all you have). This prints two headbands and two bottom stabilizers. Using print-speed of 130% on the Prusa seems to work fine. If you use '''ABS''', please use the files below to slice for your printer.
* '''3MF slicer project file''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.5/thin_shield.3mf thin_shield.3mf] and [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.5//normal_shield.3mf normal_shield.3mf]. This allows you to choose placement, temperatures etc.
* '''slice yourself''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.5/fab/thin_shield_with_support.stl thin_shield_with_support.stl] (right click, download or ''save link as...'') Recommended for '''PETG''' and [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.5/fab/normal_shield_with_support.stl normal_shield_with_support.stl] recommended for '''PLA'''. Also please also print one [https://github.com/hzeller/prusa-covid19-shield-remix/raw/master/baseline/bottom_reinforcement.stl bottom_reinforcement.stl] per headband (sometimes it is more efficient to do that separately) If you slice the version with built-in support, make sure to have 'enable thin wall detection' in your slicer. The 3mf files already have that enabled.

[[File:covid-headband-build-plate.png]]

More files, 3mf and STL you get directly on Github: https://github.com/hzeller/prusa-covid19-shield-remix#cut-to-the-chase-gcode-ready-to-use

If your printer can't fit faceshield, you can still help and print the bottom parts, stabilizing the shield plastic: Print as many [https://github.com/hzeller/prusa-covid19-shield-remix/raw/master/baseline/bottom_reinforcement.stl bottom_reinforcement.stl] that you fit on your print-bed: we need them as many people with larger print-beds focus on the headbands itself right now.

==== Other Versions ====

Instead of Prusa RC2 or RC3, please use the version above, as it contains changes we got as feedback from
our local healthcare community.

We're working on a stacked version that prints reliably, but if you want/need to print stacked, as an
exception to the above, you can use the Prusa pre-arranged to print 3 at one time.
* [[:media:COVID19 SHIELD R1 3x.stl|Prusa RC1 (x3)]] STL File
For other arrangements, here's the [https://www.prusaprinters.org/prints/25857-protective-face-shield-rc1 original Prusa design page].

== Laser Cut Parts ==

* [[:media:Wrapover-faceshield-laser.svg|The SVG file for laser cutting the shield part]] SVG File

The shields are cut from 0.020 inch thick PETG sheets. Our base design fits into sheets of 24"x32". If we get donations of larger sheets, then we cut it down before using it.

== Elastic Band ==

Each shield uses approximately 8 inches of button hole elastic, 3/4 inch wide.

Sources
* [https://www.homesew.com/ Home Sew]

== Assembly and Disassembly ==

'''Assembly'''

Assembly requires about 8" of 3/4 wide button hole elastic.

* A short video on [https://youtu.be/qKqDUExM4Q8 how to assemble the Maker Nexus face shield version RC2]

* The original design [https://www.prusaprinters.org/prints/25857-prusa-protective-face-shield-rc2 Prusa RC2 STL- On this page]

Each box of face shields contains a QR Code that links to [[Covid-19 Shield User Instructions]]

'''Disassembly for cleaning'''

These face shields can be taken apart for cleaning.

The sheets are made of PETG and can handle alcohol and UV. The head band and spreader could be made of PETG, ABS, or PLA. These all resist alcohol but are heat sensitive. We are not experts in how to sanitize equipment. You, as user, take responsibility for appropriate sanitization. See [https://help.prusa3d.com/en/article/prusa-face-shield-disinfection_125457#_ga=2.91675610.133084680.1585293016-139199844.1585293016 this page from Prusa Research] for information on sanitization methods currently being tested.

A short video on [https://www.youtube.com/watch?v=F7FFPzGeRME how to take the Maker Nexus face shield apart]

== Help at MN ==
At this time we do not need volunteers in the makerspace itself. The space is on lockdown so that we do not introduce the virus into our work area.

'''Donations Needed'''

* PETG filament is useful - if you aren't able to print yourself. Any color in both 1.75mm and 3mm diameter filament. It should be in a factory sealed box or in a bag with desiccant.
* 3/4"-1" button hole elastic
* 0.020" thick PETG film for disposable masks, sheets or rolls

You can drop-off the donations at Maker Nexus, just leave it in the box by the front door of Maker Nexus. Please use appropriate procedures when packaging - including wearing a new pair of gloves and a face mask if available.

You can also donate via PayPal towards COVID-19 efforts that Maker Nexus is working on. [http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Who to contact'''

MN members join the #covid-faceshield channel on [https://www.makernexus.com/member-dashboard Slack]

If you don't have access to Slack, please email [mailto:faceshields@makernexus.org faceshields@makernexus.org]

== External Links ==

=== Information & Discussions ===
- [https://join.slack.com/t/prusafaceshields/shared_invite/zt-cz809azp-f41jGEYZivRKWH6IcYEmKw External slack for Prusa Shield discussions]

== Status ==
As of 3/29/2020

* We have 15 3D printers at Maker Nexus and 205 printers at homes through out the community.

* We have enough 0.020/0.030 PETg sheets to make about 4000 more shields. This is hard to buy now and we are testing alternatives.

* We have enough filament to keep our printers running and are buying more. Our preferred filament is now on back order and we are sourcing directly from China.

* We are exploring injection molding for the head bands. This may take some time.

* We have shipped over 650 face shields. Yea! That is what it's all about.

3D printed face shields

2020-04-01T03:11:49Z

Hzeller: Switch to Version 1.5, larger radius.

[[File:Face shield front.jpg|200px]] [[File:Face shield side.jpg|350px]] [[File:Face shield top.jpg|350px]]

== Overview ==
Face shields are used by health care professionals to protect them when working with patients. Hospital supplies are running low. While they prefer to use commercially manufactured ones, in this emergency they are looking for alternative sources.

The headband portion of these shields is made on a 3D printer. If you have a 3D printer, you can make these. We have several at Maker Nexus that will be running as long as we have supplies. We deliver them to local hospitals.

* [https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform Sign up to use your own 3D printer] to help
* [https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform Sign up to receive face shields] for your health care facility

'''In the News'''

* A TV segment [https://sanfrancisco.cbslocal.com/video/4495791-maker-community-uses-3-d-printer-to-supply-ppe-to-health-professionals/ from KPIX]
* Watch a short [https://www.ktvu.com/news/covid-19-sunnyvale-company-designing-3d-protective-masks-to-meet-demand KTVU news report about our efforts.]

'''How much do they cost?'''

We give these away, paying for them from donations. We do not sell them. Promises of donations or actual donations do not affect who is prioritized to receive the PPE. The allocation team is not told who has donated. However, they cost us about $5 each to make. Donations are critical for us to be able to keep producing. We will make them until the money runs out.

[http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Is there really a need?'''

* We've heard from friends that "nurses are cutting up plastic soda bottles to make face shields, using saran wrap on top of N95 masks to allow for multi-use."
* One local nurse said they are making face shields from cut up shower curtains and hot glue guns.
* In reviewing the current design: "The nurses were over the moon about how easily the shields can be disassembled and sterilized."
* A nurse from Marin called us and I got her hooked into the allocation process and told her they were free. She started crying on the phone. - JimS

We are ramping up to make 1,000 a week, maybe more.

'''How do I get some?'''

If your health care facility needs face shields, fill in this form:

[https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform?usp=sf_link My Facility Needs Face Shields] (click the link)

A link to [[MN COVID Response|Other COVID Projects]]

== 3D Print Parts At Home ==

=== Use Your 3D Printer for good ===

'''Sign up'''

We are establishing a network of 3D printer owners who can make the headbands for us. You make them and deliver them to our facility where we do the assembly and get them to the hospitals. If you want to be part of our network, fill in this form and we will contact you:

[https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform I want to help make them]

=== What to do with the finished product ===
When you have parts ready to deliver, please follow the following steps:
# Fill out [https://docs.google.com/forms/d/e/1FAIpQLSdJfZz5M-xxQifJmFBdNQcn7c3i5eFabV7StA5ep9zsJuco9Q/viewform?usp=sf_link this form] with information about your donation (so we can track inventory)
# Seal in plastic bag.
# Label bag with your email, the version of face shield you printed (e.g. "MN 1.3" see releases in parts below; or "RC2" if you used that), the material printed with and the date you closed the bag.
# Mail to
Maker Nexus
234 E. Caribbean Drive
Sunnyvale, CA 94089
OR
Deliver to us if you are local and it does not violate the Shelter In Place Order - please do not make a special trip for this - but if you are passing by on your way to get essential groceries and want to drop it off, that is acceptable - there is a box outside our front door where donated parts can be placed.

Please be sure you are following proper sanitation procedures when you bag parts - if possible, wear gloves and a breathing mask, wipe or spray with disinfectant if available. We want to minimize the chance of cross-contamination. After it reaches MN, we will be further disinfecting them before delivering to its end destination.

We have some limited amount of 1.75mm PETg, ABS, and PLA that we can give you when you have dropped off 20 or more face shields parts. Supplies are very limited so please only take some if you need it. Just ring the door bell and ask if we have any filament in stock.

== 3D Print Directions ==

=== Materials ===

'''PETG filament Sources'''

These face shields are best done with PETG filament. A 1kg spool can make about 20 units.

* [http://matterhackers.com Matter Hackers]
** 3mm product id # MF3CF7NH 1kg about $25
** 1.75mm product id # M3MY2VQG 1kg about $24 (only $20 each if you buy 5)
** 1.75mm product id # MTVEPT25 10 pounds (4.5kg) about $185 It is a higher quality PETG filament, but is it really worth the extra cost?

'''PETG Sheet Sources'''

One 48x96 inch sheet can make about 24 shields.

* [http://www.piedmontplastics.com Piedmont Plastics] in San Leandro, CA. .020x48x96 CLR VIVAK PETG JFM about $16/sheet.

=== Instructions ===

'''Printer Settings'''

Print with '''PETG''' for ease of sanitation - IPA, Hydrogen Peroxide, Bleach, and Acetic Acid up to 10% can all be safely used with PETG.
If you don't have PETG, using '''ABS''' and '''PLA''' is also an approved option.

Print settings:
* Temperature based on filament selection.
* 3 perimeters
* 100% infill
* 0.3mm Draft settings in PrusaSlicer work fine
* we are running our Prusa's at 130% speed

=== Parts ===
We are focusing production on the Prusa RC2 headband with some modification to reduce weight and center the mounting pins, based on feedback from medical professionals.
If your printer is large enough to print this design, PLEASE switch production to that. If your printer cannot accommodate that, RC1 pieces are still helpful. See below for details on each.

==== RC2 + MakerNexus extensions (PREFERRED) ====

The MakerNexus modifications [https://github.com/hzeller/prusa-covid19-shield-remix are on github].

Most important change is that the pins are centered in the headband, so that there is something covering the shield punch, making a better seal.

Easiest is to download the release at https://github.com/hzeller/prusa-covid19-shield-remix/releases (latest is v1.5 from 2020-03-31)

[[File:covid-headband-build-plate.png]]

This archive contains (next to the source files) the following files used used to print, which you also can download here:

* '''Ready-to-go GCode''': [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.5/fab/thin_shield_0.3mm_PETG_MK3S.gcode thin_shield_0.3mm_PETG_MK3S.gcode] (right click, download or ''save link as...'') for '''PETG''' (preferred), [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.5/fab/normal_shield_0.3mm_PLA_MK3S.gcode normal_shield_0.3mm_PLA_MK3S.gcode] for '''PLA''' (if that's all you have). This prints two headbands and two bottom stabilizers. Using print-speed of 130% on the Prusa seems to work fine. If you use '''ABS''', please use the files below to slice for your printer.
* '''3MF slicer project file''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.5/thin_shield.3mf thin_shield.3mf] and [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.5//normal_shield.3mf normal_shield.3mf]. This allows you to choose placement, temperatures etc.
* '''slice yourself''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.5/fab/thin_shield_with_support.stl thin_shield_with_support.stl] (right click, download or ''save link as...'') Recommended for '''PETG''' and [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.5/fab/normal_shield_with_support.stl normal_shield_with_support.stl] recommended for '''PLA'''. Also please also print one [https://github.com/hzeller/prusa-covid19-shield-remix/raw/master/baseline/bottom_reinforcement.stl bottom_reinforcement.stl] per headband (sometimes it is more efficient to do that separately) If you slice the version with built-in support, make sure to have 'enable thin wall detection' in your slicer. The 3mf files already have that enabled.

More files, 3mf and STL you get directly on Github: https://github.com/hzeller/prusa-covid19-shield-remix#cut-to-the-chase-gcode-ready-to-use

If your printer can't fit faceshield, you can still help and print the bottom parts, stabilizing the shield plastic: Print as many [https://github.com/hzeller/prusa-covid19-shield-remix/raw/master/baseline/bottom_reinforcement.stl bottom_reinforcement.stl] that you fit on your print-bed: we need them as many people with larger print-beds focus on the headbands itself right now.

==== Other Versions ====

Instead of Prusa RC2 or RC3, please use the version above, as it contains changes we got as feedback from
our local healthcare community.

We're working on a stacked version that prints reliably, but if you want/need to print stacked, as an
exception to the above, you can use the Prusa pre-arranged to print 3 at one time.
* [[:media:COVID19 SHIELD R1 3x.stl|Prusa RC1 (x3)]] STL File
For other arrangements, here's the [https://www.prusaprinters.org/prints/25857-protective-face-shield-rc1 original Prusa design page].

== Laser Cut Parts ==

* [[:media:Wrapover-faceshield-laser.svg|The SVG file for laser cutting the shield part]] SVG File

The shields are cut from 0.020 inch thick PETG sheets. Our base design fits into sheets of 24"x32". If we get donations of larger sheets, then we cut it down before using it.

== Elastic Band ==

Each shield uses approximately 8 inches of button hole elastic, 3/4 inch wide.

Sources
* [https://www.homesew.com/ Home Sew]

== Assembly and Disassembly ==

'''Assembly'''

Assembly requires about 8" of 3/4 wide button hole elastic.

* A short video on [https://youtu.be/qKqDUExM4Q8 how to assemble the Maker Nexus face shield version RC2]

* The original design [https://www.prusaprinters.org/prints/25857-prusa-protective-face-shield-rc2 Prusa RC2 STL- On this page]

Each box of face shields contains a QR Code that links to [[Covid-19 Shield User Instructions]]

'''Disassembly for cleaning'''

These face shields can be taken apart for cleaning.

The sheets are made of PETG and can handle alcohol and UV. The head band and spreader could be made of PETG, ABS, or PLA. These all resist alcohol but are heat sensitive. We are not experts in how to sanitize equipment. You, as user, take responsibility for appropriate sanitization. See [https://help.prusa3d.com/en/article/prusa-face-shield-disinfection_125457#_ga=2.91675610.133084680.1585293016-139199844.1585293016 this page from Prusa Research] for information on sanitization methods currently being tested.

A short video on [https://www.youtube.com/watch?v=F7FFPzGeRME how to take the Maker Nexus face shield apart]

== Help at MN ==
At this time we do not need volunteers in the makerspace itself. The space is on lockdown so that we do not introduce the virus into our work area.

'''Donations Needed'''

* PETG filament is useful - if you aren't able to print yourself. Any color in both 1.75mm and 3mm diameter filament. It should be in a factory sealed box or in a bag with desiccant.
* 3/4"-1" button hole elastic
* 0.020" thick PETG film for disposable masks, sheets or rolls

You can drop-off the donations at Maker Nexus, just leave it in the box by the front door of Maker Nexus. Please use appropriate procedures when packaging - including wearing a new pair of gloves and a face mask if available.

You can also donate via PayPal towards COVID-19 efforts that Maker Nexus is working on. [http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Who to contact'''

MN members join the #covid-faceshield channel on [https://www.makernexus.com/member-dashboard Slack]

If you don't have access to Slack, please email [mailto:faceshields@makernexus.org faceshields@makernexus.org]

== External Links ==

=== Information & Discussions ===
- [https://join.slack.com/t/prusafaceshields/shared_invite/zt-cz809azp-f41jGEYZivRKWH6IcYEmKw External slack for Prusa Shield discussions]

== Status ==
As of 3/29/2020

* We have 15 3D printers at Maker Nexus and 205 printers at homes through out the community.

* We have enough 0.020/0.030 PETg sheets to make about 4000 more shields. This is hard to buy now and we are testing alternatives.

* We have enough filament to keep our printers running and are buying more. Our preferred filament is now on back order and we are sourcing directly from China.

* We are exploring injection molding for the head bands. This may take some time.

* We have shipped over 650 face shields. Yea! That is what it's all about.

3D printed face shields

2020-03-31T17:54:56Z

Hzeller: /* RC2 + MakerNexus extensions (PREFERRED) */

[[File:Face shield front.jpg|200px]] [[File:Face shield side.jpg|350px]] [[File:Face shield top.jpg|350px]]

== Overview ==
Face shields are used by health care professionals to protect them when working with patients. Hospital supplies are running low. While they prefer to use commercially manufactured ones, in this emergency they are looking for alternative sources.

The headband portion of these shields is made on a 3D printer. If you have a 3D printer, you can make these. We have several at Maker Nexus that will be running as long as we have supplies. We deliver them to local hospitals.

* [https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform Sign up to use your own 3D printer] to help
* [https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform Sign up to receive face shields] for your health care facility

'''In the News'''

* A TV segment [https://sanfrancisco.cbslocal.com/video/4495791-maker-community-uses-3-d-printer-to-supply-ppe-to-health-professionals/ from KPIX]
* Watch a short [https://www.ktvu.com/news/covid-19-sunnyvale-company-designing-3d-protective-masks-to-meet-demand KTVU news report about our efforts.]

'''How much do they cost?'''

We give these away, paying for them from donations. We do not sell them. Promises of donations or actual donations do not affect who is prioritized to receive the PPE. The allocation team is not told who has donated. However, they cost us about $5 each to make. Donations are critical for us to be able to keep producing. We will make them until the money runs out.

[http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Is there really a need?'''

* We've heard from friends that "nurses are cutting up plastic soda bottles to make face shields, using saran wrap on top of N95 masks to allow for multi-use."
* One local nurse said they are making face shields from cut up shower curtains and hot glue guns.
* In reviewing the current design: "The nurses were over the moon about how easily the shields can be disassembled and sterilized."
* A nurse from Marin called us and I got her hooked into the allocation process and told her they were free. She started crying on the phone. - JimS

We are ramping up to make 1,000 a week, maybe more.

'''How do I get some?'''

If your health care facility needs face shields, fill in this form:

[https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform?usp=sf_link My Facility Needs Face Shields] (click the link)

A link to [[MN COVID Response|Other COVID Projects]]

== 3D Print Parts At Home ==

=== Use Your 3D Printer for good ===

'''Sign up'''

We are establishing a network of 3D printer owners who can make the headbands for us. You make them and deliver them to our facility where we do the assembly and get them to the hospitals. If you want to be part of our network, fill in this form and we will contact you:

[https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform I want to help make them]

=== What to do with the finished product ===
When you have parts ready to deliver, please follow the following steps:
# Fill out [https://docs.google.com/forms/d/e/1FAIpQLSdJfZz5M-xxQifJmFBdNQcn7c3i5eFabV7StA5ep9zsJuco9Q/viewform?usp=sf_link this form] with information about your donation (so we can track inventory)
# Seal in plastic bag.
# Label bag with your email, the version of face shield you printed (e.g. "MN 1.3" see releases in parts below; or "RC2" if you used that), the material printed with and the date you closed the bag.
# Mail to
Maker Nexus
234 E. Caribbean Drive
Sunnyvale, CA 94089
OR
Deliver to us if you are local and it does not violate the Shelter In Place Order - please do not make a special trip for this - but if you are passing by on your way to get essential groceries and want to drop it off, that is acceptable - there is a box outside our front door where donated parts can be placed.

Please be sure you are following proper sanitation procedures when you bag parts - if possible, wear gloves and a breathing mask, wipe or spray with disinfectant if available. We want to minimize the chance of cross-contamination. After it reaches MN, we will be further disinfecting them before delivering to its end destination.

We have some limited amount of 1.75mm PETg, ABS, and PLA that we can give you when you have dropped off 20 or more face shields parts. Supplies are very limited so please only take some if you need it. Just ring the door bell and ask if we have any filament in stock.

== 3D Print Directions ==

=== Materials ===

'''PETG filament Sources'''

These face shields are best done with PETG filament. A 1kg spool can make about 20 units.

* [http://matterhackers.com Matter Hackers]
** 3mm product id # MF3CF7NH 1kg about $25
** 1.75mm product id # M3MY2VQG 1kg about $24 (only $20 each if you buy 5)
** 1.75mm product id # MTVEPT25 10 pounds (4.5kg) about $185 It is a higher quality PETG filament, but is it really worth the extra cost?

'''PETG Sheet Sources'''

One 48x96 inch sheet can make about 24 shields.

* [http://www.piedmontplastics.com Piedmont Plastics] in San Leandro, CA. .020x48x96 CLR VIVAK PETG JFM about $16/sheet.

=== Instructions ===

'''Printer Settings'''

Print with '''PETG''' for ease of sanitation - IPA, Hydrogen Peroxide, Bleach, and Acetic Acid up to 10% can all be safely used with PETG.
If you don't have PETG, using '''ABS''' and '''PLA''' is also an approved option.

Print settings:
* Temperature based on filament selection.
* 3 perimeters
* 100% infill
* 0.3mm Draft settings in PrusaSlicer work fine
* we are running our Prusa's at 130% speed

=== Parts ===
We are focusing production on the Prusa RC2 headband with some modification to reduce weight and center the mounting pins, based on feedback from medical professionals.
If your printer is large enough to print this design, PLEASE switch production to that. If your printer cannot accommodate that, RC1 pieces are still helpful. See below for details on each.

==== RC2 + MakerNexus extensions (PREFERRED) ====

The MakerNexus modifications [https://github.com/hzeller/prusa-covid19-shield-remix are on github].

Most important change is that the pins are centered in the headband, so that there is something covering the shield punch, making a better seal.

Easiest is to download the release at https://github.com/hzeller/prusa-covid19-shield-remix/releases (latest is v1.4 from 2020-03-29)

[[File:covid-headband-build-plate.png]]

This archive contains (next to the source files) the following files used used to print, which you also can download here:

* '''Ready-to-go GCode''': [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/fab/thin_shield_0.3mm_PETG_MK3S.gcode thin_shield_0.3mm_PETG_MK3S.gcode] (right click, download or ''save link as...'') for '''PETG''' (preferred), [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/fab/normal_shield_0.3mm_PLA_MK3S.gcode normal_shield_0.3mm_PLA_MK3S.gcode] for '''PLA''' (if that's all you have). This prints two headbands and two bottom stabilizers. Using print-speed of 130% on the Prusa seems to work fine. If you use '''ABS''', please use the files below to slice for your printer.
* '''3MF slicer project file''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/thin_shield.3mf thin_shield.3mf] and [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4//normal_shield.3mf normal_shield.3mf]. This allows you to choose placement, temperatures etc.
* '''slice yourself''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/fab/thin_shield_with_support.stl thin_shield_with_support.stl] (right click, download or ''save link as...'') Recommended for '''PETG''' and [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/fab/normal_shield_with_support.stl normal_shield_with_support.stl] recommended for '''PLA'''. Also please also print one [https://github.com/hzeller/prusa-covid19-shield-remix/raw/master/baseline/bottom_reinforcement.stl bottom_reinforcement.stl] per headband (sometimes it is more efficient to do that separately) If you slice the version with built-in support, make sure to have 'enable thin wall detection' in your slicer. The 3mf files already have that enabled.

More files, 3mf and STL you get directly on Github: https://github.com/hzeller/prusa-covid19-shield-remix#cut-to-the-chase-gcode-ready-to-use

If your printer can't fit faceshield, you can still help and print the bottom parts, stabilizing the shield plastic: Print as many [https://github.com/hzeller/prusa-covid19-shield-remix/raw/master/baseline/bottom_reinforcement.stl bottom_reinforcement.stl] that you fit on your print-bed: we need them as many people with larger print-beds focus on the headbands itself right now.

==== Other Versions ====

Instead of Prusa RC2 or RC3, please use the version above, as it contains changes we got as feedback from
our local healthcare community.

We're working on a stacked version that prints reliably, but if you want/need to print stacked, as an
exception to the above, you can use the Prusa pre-arranged to print 3 at one time.
* [[:media:COVID19 SHIELD R1 3x.stl|Prusa RC1 (x3)]] STL File
For other arrangements, here's the [https://www.prusaprinters.org/prints/25857-protective-face-shield-rc1 original Prusa design page].

== Laser Cut Parts ==

* [[:media:Wrapover-faceshield-laser.svg|The SVG file for laser cutting the shield part]] SVG File

The shields are cut from 0.020 inch thick PETG sheets. Our base design fits into sheets of 24"x32". If we get donations of larger sheets, then we cut it down before using it.

== Elastic Band ==

Each shield uses approximately 8 inches of button hole elastic, 3/4 inch wide.

Sources
* [https://www.homesew.com/ Home Sew]

== Assembly and Disassembly ==

'''Assembly'''

Assembly requires about 8" of 3/4 wide button hole elastic.

* A short video on [https://youtu.be/qKqDUExM4Q8 how to assemble the Maker Nexus face shield version RC2]

* The original design [https://www.prusaprinters.org/prints/25857-prusa-protective-face-shield-rc2 Prusa RC2 STL- On this page]

Each box of face shields contains a QR Code that links to [[Covid-19 Shield User Instructions]]

'''Disassembly for cleaning'''

These face shields can be taken apart for cleaning.

The sheets are made of PETG and can handle alcohol and UV. The head band and spreader could be made of PETG, ABS, or PLA. These all resist alcohol but are heat sensitive. We are not experts in how to sanitize equipment. You, as user, take responsibility for appropriate sanitization. See [https://help.prusa3d.com/en/article/prusa-face-shield-disinfection_125457#_ga=2.91675610.133084680.1585293016-139199844.1585293016 this page from Prusa Research] for information on sanitization methods currently being tested.

A short video on [https://www.youtube.com/watch?v=F7FFPzGeRME how to take the Maker Nexus face shield apart]

== Help at MN ==
At this time we do not need volunteers in the makerspace itself. The space is on lockdown so that we do not introduce the virus into our work area.

'''Donations Needed'''

* PETG filament is useful - if you aren't able to print yourself. Any color in both 1.75mm and 3mm diameter filament. It should be in a factory sealed box or in a bag with desiccant.
* 3/4"-1" button hole elastic
* 0.020" thick PETG film for disposable masks, sheets or rolls

You can drop-off the donations at Maker Nexus, just leave it in the box by the front door of Maker Nexus. Please use appropriate procedures when packaging - including wearing a new pair of gloves and a face mask if available.

You can also donate via PayPal towards COVID-19 efforts that Maker Nexus is working on. [http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Who to contact'''

MN members join the #covid-faceshield channel on [https://www.makernexus.com/member-dashboard Slack]

If you don't have access to Slack, please email [mailto:faceshields@makernexus.org faceshields@makernexus.org]

== External Links ==

=== Information & Discussions ===
- [https://join.slack.com/t/prusafaceshields/shared_invite/zt-cz809azp-f41jGEYZivRKWH6IcYEmKw External slack for Prusa Shield discussions]

== Status ==
As of 3/29/2020

* We have 15 3D printers at Maker Nexus and 205 printers at homes through out the community.

* We have enough 0.020/0.030 PETg sheets to make about 4000 more shields. This is hard to buy now and we are testing alternatives.

* We have enough filament to keep our printers running and are buying more. Our preferred filament is now on back order and we are sourcing directly from China.

* We are exploring injection molding for the head bands. This may take some time.

* We have shipped over 650 face shields. Yea! That is what it's all about.

3D printed face shields

2020-03-31T06:52:57Z

Hzeller: /* RC2 + MakerNexus extensions (PREFERRED) */

[[File:Face shield front.jpg|200px]] [[File:Face shield side.jpg|350px]] [[File:Face shield top.jpg|350px]]

== Overview ==
Face shields are used by health care professionals to protect them when working with patients. Hospital supplies are running low. While they prefer to use commercially manufactured ones, in this emergency they are looking for alternative sources.

The headband portion of these shields is made on a 3D printer. If you have a 3D printer, you can make these. We have several at Maker Nexus that will be running as long as we have supplies. We deliver them to local hospitals.

* [https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform Sign up to use your own 3D printer] to help
* [https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform Sign up to receive face shields] for your health care facility

'''In the News'''

* A TV segment [https://sanfrancisco.cbslocal.com/video/4495791-maker-community-uses-3-d-printer-to-supply-ppe-to-health-professionals/ from KPIX]
* Watch a short [https://www.ktvu.com/news/covid-19-sunnyvale-company-designing-3d-protective-masks-to-meet-demand KTVU news report about our efforts.]

'''How much do they cost?'''

We give these away, paying for them from donations. We do not sell them. Promises of donations or actual donations do not affect who is prioritized to receive the PPE. The allocation team is not told who has donated. However, they cost us about $5 each to make. Donations are critical for us to be able to keep producing. We will make them until the money runs out.

[http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Is there really a need?'''

* We've heard from friends that "nurses are cutting up plastic soda bottles to make face shields, using saran wrap on top of N95 masks to allow for multi-use."
* One local nurse said they are making face shields from cut up shower curtains and hot glue guns.
* In reviewing the current design: "The nurses were over the moon about how easily the shields can be disassembled and sterilized."
* A nurse from Marin called us and I got her hooked into the allocation process and told her they were free. She started crying on the phone. - JimS

We are ramping up to make 1,000 a week, maybe more.

'''How do I get some?'''

If your health care facility needs face shields, fill in this form:

[https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform?usp=sf_link My Facility Needs Face Shields] (click the link)

A link to [[MN COVID Response|Other COVID Projects]]

== 3D Print Parts At Home ==

=== Use Your 3D Printer for good ===

'''Sign up'''

We are establishing a network of 3D printer owners who can make the headbands for us. You make them and deliver them to our facility where we do the assembly and get them to the hospitals. If you want to be part of our network, fill in this form and we will contact you:

[https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform I want to help make them]

=== What to do with the finished product ===
When you have parts ready to deliver, please follow the following steps:
# Fill out [https://docs.google.com/forms/d/e/1FAIpQLSdJfZz5M-xxQifJmFBdNQcn7c3i5eFabV7StA5ep9zsJuco9Q/viewform?usp=sf_link this form] with information about your donation (so we can track inventory)
# Seal in plastic bag.
# Label bag with your email, the version of face shield you printed (e.g. "MN 1.3" see releases in parts below; or "RC2" if you used that), the material printed with and the date you closed the bag.
# Mail to
Maker Nexus
234 E. Carribean Drive
Sunnyvale, CA 94089
OR
Deliver to us if you are local and it does not violate the Shelter In Place Order - please do not make a special trip for this - but if you are passing by on your way to get essential groceries and want to drop it off, that is acceptable - there is a box outside our front door where donated parts can be placed.

Please be sure you are following proper sanitation procedures when you bag parts - if possible, wear gloves and a breathing mask, wipe or spray with disinfectant if available. We want to minimize the chance of cross-contamination. After it reaches MN, we will be further disinfecting them before delivering to its end destination.

We are not in a position to supply you with filament. If we are successful at raising more money for this program, then we might be able to give you a new reel when you drop off 20 face shield sets.

== 3D Print Directions ==

=== Materials ===

'''PETG filament Sources'''

These face shields are best done with PETG filament. A 1kg spool can make about 20 units.

* [http://matterhackers.com Matter Hackers]
** 3mm product id # MF3CF7NH 1kg about $25
** 1.75mm product id # M3MY2VQG 1kg about $24 (only $20 each if you buy 5)
** 1.75mm product id # MTVEPT25 10 pounds (4.5kg) about $185 It is a higher quality PETG filament, but is it really worth the extra cost?

'''PETG Sheet Sources'''

One 48x96 inch sheet can make about 24 shields.

* [http://www.piedmontplastics.com Piedmont Plastics] in San Leandro, CA. .020x48x96 CLR VIVAK PETG JFM about $16/sheet.

=== Instructions ===

'''Printer Settings'''

Print with '''PETG''' for ease of sanitation - IPA, Hydrogen Peroxide, Bleach, and Acetic Acid up to 10% can all be safely used with PETG.
If you don't have PETG, using '''ABS''' and '''PLA''' is also an approved option.

Print settings:
* Temperature based on filament selection.
* 3 perimeters
* 100% infill
* 0.3mm Draft settings in PrusaSlicer work fine
* we are running our Prusa's at 130% speed

=== Parts ===
We are focusing production on the Prusa RC2 headband with some modification to reduce weight and center the mounting pins, based on feedback from medical professionals.
If your printer is large enough to print this design, PLEASE switch production to that. If your printer cannot accommodate that, RC1 pieces are still helpful. See below for details on each.

==== RC2 + MakerNexus extensions (PREFERRED) ====

The MakerNexus modifications [https://github.com/hzeller/prusa-covid19-shield-remix are on github].

Most important change is that the pins are centered in the headband, so that there is something covering the shield punch, making a better seal.

Easiest is to download the release at https://github.com/hzeller/prusa-covid19-shield-remix/releases (latest is v1.4 from 2020-03-29)

[[File:covid-headband-build-plate.png]]

This archive contains (next to the source files) the following files used used to print, which you also can download here:

* '''Ready-to-go GCode''': [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/fab/thin_shield_0.3mm_PETG_MK3S.gcode thin_shield_0.3mm_PETG_MK3S.gcode] (right click, download or ''save link as...'') for '''PETG''' (preferred), [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/fab/normal_shield_0.3mm_PLA_MK3S.gcode normal_shield_0.3mm_PLA_MK3S.gcode] for '''PLA''' (if that's all you have). This prints two headbands and two bottom stabilizers. Using print-speed of 130% on the Prusa seems to work fine. If you use '''ABS''', please use the files below to slice for your printer.
* '''3MF slicer project file''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/thin_shield.3mf thin_shield.3mf] and [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4//normal_shield.3mf normal_shield.3mf]. This allows you to choose placement, temperatures etc.
* '''slice yourself''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/fab/thin_shield_with_support.stl thin_shield_with_support.stl] (right click, download or ''save link as...'') Recommended for '''PETG''' and [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/fab/normal_shield_with_support.stl normal_shield_with_support.stl] recommended for '''PLA'''. If you slice the version with support, make sure to have 'enable thin wall detection' in your slicer. The 3mf files already have that enabled.

More files, 3mf and STL you get directly on Github: https://github.com/hzeller/prusa-covid19-shield-remix#cut-to-the-chase-gcode-ready-to-use

If your printer can't fit faceshield, you can still help and print the bottom parts, stabilizing the shield plastic: The [https://www.prusaprinters.org/prints/25857-prusa-protective-face-shield-rc3 Prusa Face Shield] page has the [https://media.prusaprinters.org/media/prints/25857/stls/260466_f1e0f39c-88fe-4b35-a909-0348aa53e412/bottom_reinforcement.stl bottom_reinforcement.stl] that you can print as many as fit on your print-bed: we need them as many people with larger print-beds focus on the headbands itself right now.

==== Other Versions ====

Instead of Prusa RC2 or RC3, please use the version above, as it contains changes we got as feedback from
our local healthcare community.

We're working on a stacked version that prints reliably, but if you want/need to print stacked, as an
exception to the above, you can use the Prusa pre-arranged to print 3 at one time.
* [[:media:COVID19 SHIELD R1 3x.stl|Prusa RC1 (x3)]] STL File
For other arrangements, here's the [https://www.prusaprinters.org/prints/25857-protective-face-shield-rc1 original Prusa design page].

== Laser Cut Parts ==

* [[:media:Wrapover-faceshield-laser.svg|The SVG file for laser cutting the shield part]] SVG File

The shields are cut from 0.020 inch thick PETG sheets. Our base design fits into sheets of 24"x32". If we get donations of larger sheets, then we cut it down before using it.

== Elastic Band ==

Each shield uses approximately 8 inches of button hole elastic, 3/4 inch wide.

Sources
* [https://www.homesew.com/ Home Sew]

== Assembly and Disassembly ==

'''Assembly'''

Assembly requires about 8" of 3/4 wide button hole elastic.

* A short video on [https://youtu.be/qKqDUExM4Q8 how to assemble the Maker Nexus face shield version RC2]

* The original design [https://www.prusaprinters.org/prints/25857-prusa-protective-face-shield-rc2 Prusa RC2 STL- On this page]

Each box of face shields contains a QR Code that links to [[Covid-19 Shield User Instructions]]

'''Disassembly for cleaning'''

These face shields can be taken apart for cleaning.

The sheets are made of PETG and can handle alcohol and UV. The head band and spreader could be made of PETG, ABS, or PLA. These all resist alcohol but are heat sensitive. We are not experts in how to sanitize equipment. You, as user, take responsibility for appropriate sanitization. See [https://help.prusa3d.com/en/article/prusa-face-shield-disinfection_125457#_ga=2.91675610.133084680.1585293016-139199844.1585293016 this page from Prusa Research] for information on sanitization methods currently being tested.

A short video on [https://www.youtube.com/watch?v=F7FFPzGeRME how to take the Maker Nexus face shield apart]

== Help at MN ==
At this time we do not need volunteers in the makerspace itself. The space is on lockdown so that we do not introduce the virus into our work area.

'''Donations Needed'''

* PETG filament is useful - if you aren't able to print yourself. Any color in both 1.75mm and 3mm diameter filament. It should be in a factory sealed box or in a bag with desiccant.
* 3/4"-1" button hole elastic
* 0.020" thick PETG film for disposable masks, sheets or rolls

You can drop-off the donations at Maker Nexus, just leave it in the box by the front door of Maker Nexus. Please use appropriate procedures when packaging - including wearing a new pair of gloves and a face mask if available.

You can also donate via PayPal towards COVID-19 efforts that Maker Nexus is working on. [http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Who to contact'''

MN members join the #covid-faceshield channel on [https://www.makernexus.com/member-dashboard Slack]

If you don't have access to Slack, please email [mailto:faceshields@makernexus.org faceshields@makernexus.org]

== External Links ==

=== Information & Discussions ===
- [https://join.slack.com/t/prusafaceshields/shared_invite/zt-cz809azp-f41jGEYZivRKWH6IcYEmKw External slack for Prusa Shield discussions]

== Status ==
As of 3/29/2020

* We have 15 3D printers at Maker Nexus and 205 printers at homes through out the community.

* We have enough 0.020/0.030 PETg sheets to make about 4000 more shields. This is hard to buy now and we are testing alternatives.

* We have enough filament to keep our printers running and are buying more. Our preferred filament is now on back order and we are sourcing directly from China.

* We are exploring injection molding for the head bands. This may take some time.

* We have shipped over 650 face shields. Yea! That is what it's all about.

3D printed face shields

2020-03-30T02:05:31Z

Hzeller: /* Instructions */

[[File:Face shield front.jpg|200px]] [[File:Face shield side.jpg|350px]] [[File:Face shield top.jpg|350px]]

== Overview ==
Face shields are used by health care professionals to protect them when working with patients. Hospital supplies are running low. While they prefer to use commercially manufactured ones, in this emergency they are looking for alternative sources.

The headband portion of these shields is made on a 3D printer. If you have a 3D printer, you can make these. We have several at Maker Nexus that will be running as long as we have supplies. We deliver them to local hospitals.

* [https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform Sign up to use your own 3D printer] to help
* [https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform Sign up to receive face shields] for your health care facility

'''In the News'''

* A TV segment [https://sanfrancisco.cbslocal.com/video/4495791-maker-community-uses-3-d-printer-to-supply-ppe-to-health-professionals/ from KPIX]
* Watch a short [https://www.ktvu.com/news/covid-19-sunnyvale-company-designing-3d-protective-masks-to-meet-demand KTVU news report about our efforts.]

'''How much do they cost?'''

We give these away, paying for them from donations. We do not sell them. Promises of donations or actual donations do not affect who is prioritized to receive the PPE. The allocation team is not told who has donated. However, they cost us about $5 each to make. Donations are critical for us to be able to keep producing. We will make them until the money runs out.

[http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Is there really a need?'''

* We've heard from friends that "nurses are cutting up plastic soda bottles to make face shields, using saran wrap on top of N95 masks to allow for multi-use."
* One local nurse said they are making face shields from cut up shower curtains and hot glue guns.
* In reviewing the current design: "The nurses were over the moon about how easily the shields can be disassembled and sterilized."
* A nurse from Marin called us and I got her hooked into the allocation process and told her they were free. She started crying on the phone. - JimS

We are ramping up to make 1,000 a week, maybe more.

'''How do I get some?'''

If your health care facility needs face shields, fill in this form:

[https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform?usp=sf_link My Facility Needs Face Shields] (click the link)

A link to [[MN COVID Response|Other COVID Projects]]

== 3D Print Parts At Home ==

=== Use Your 3D Printer for good ===

'''Sign up'''

We are establishing a network of 3D printer owners who can make the headbands for us. You make them and deliver them to our facility where we do the assembly and get them to the hospitals. If you want to be part of our network, fill in this form and we will contact you:

[https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform I want to help make them]

'''Report your progress'''

If you've signed-up and started printing already:
[https://docs.google.com/spreadsheets/d/1Aoq7a0YbkPbGiMZGSxBgo0ySlgDWZHoaCvXc8sx9FU8/edit Keep us updated with your print progress].
Please request permission to access the file if you're prompted to, and we'll respond as quickly as we can.

=== What to do with the finished product ===
When you have parts ready to deliver, please follow the following steps:
# Fill out [https://docs.google.com/forms/d/e/1FAIpQLSdJfZz5M-xxQifJmFBdNQcn7c3i5eFabV7StA5ep9zsJuco9Q/viewform?usp=sf_link this form] with information about your donation (so we can track inventory)
# Seal in plastic bag.
# Label bag with your email, the version of face shield you printed (e.g. "MN 1.3" see releases in parts below; or "RC2" if you used that), the material printed with and the date you closed the bag.
# Mail to
Maker Nexus
234 E. Carribean Drive
Sunnyvale, CA 94089
OR
Deliver to us if you are local and it does not violate the Shelter In Place Order - please do not make a special trip for this - but if you are passing by on your way to get essential groceries and want to drop it off, that is acceptable - there is a box outside our front door where donated parts can be placed.

Please be sure you are following proper sanitation procedures when you bag parts - if possible, wear gloves and a breathing mask, wipe or spray with disinfectant if available. We want to minimize the chance of cross-contamination. After it reaches MN, we will be further disinfecting them before delivering to its end destination.

We are not in a position to supply you with filament. If we are successful at raising more money for this program, then we might be able to give you a new reel when you drop off 20 face shield sets.

== 3D Print Directions ==

=== Materials ===

'''PETG filament Sources'''

These face shields are best done with PETG filament. A 1kg spool can make about 20 units.

* [http://matterhackers.com Matter Hackers]
** 3mm product id # MF3CF7NH 1kg about $25
** 1.75mm product id # M3MY2VQG 1kg about $24 (only $20 each if you buy 5)
** 1.75mm product id # MTVEPT25 10 pounds (4.5kg) about $185 It is a higher quality PETG filament, but is it really worth the extra cost?

'''PETG Sheet Sources'''

One 48x96 inch sheet can make about 24 shields.

* [http://www.piedmontplastics.com Piedmont Plastics] in San Leandro, CA. .020x48x96 CLR VIVAK PETG JFM about $16/sheet.

=== Instructions ===

'''Printer Settings'''

Print with '''PETG''' for ease of sanitation - IPA, Hydrogen Peroxide, Bleach, and Acetic Acid up to 10% can all be safely used with PETG.
If you don't have PETG, using '''ABS''' and '''PLA''' is also an approved option.

Print settings:
* Temperature based on filament selection.
* 3 perimeters
* 100% infill
* 0.3mm Draft settings in PrusaSlicer work fine
* we are running our Prusa's at 130% speed

=== Parts ===
We are focusing production on the Prusa RC2 headband with some modification to reduce weight and center the mounting pins, based on feedback from medical professionals.
If your printer is large enough to print this design, PLEASE switch production to that. If your printer cannot accommodate that, RC1 pieces are still helpful. See below for details on each.

==== RC2 + MakerNexus extensions (PREFERRED) ====

The MakerNexus modifications [https://github.com/hzeller/prusa-covid19-shield-remix are on github].

Most important change is that the pins are centered in the headband, so that there is something covering the shield punch, making a better seal.

Easiest is to download the release at https://github.com/hzeller/prusa-covid19-shield-remix/releases (latest is v1.4 from 2020-03-29)

[[File:covid-headband-build-plate.png]]

This archive contains (next to the source files) the following files used used to print, which you also can download here:

* '''Ready-to-go GCode''': [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/fab/thin_shield_0.3mm_PETG_MK3S.gcode thin_shield_0.3mm_PETG_MK3S.gcode] (right click, download or ''save link as...'') for '''PETG''' (preferred), [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/fab/normal_shield_0.3mm_PLA_MK3S.gcode normal_shield_0.3mm_PLA_MK3S.gcode] for '''PLA''' (if that's all you have). This prints two headbands and two bottom stabilizers. Using print-speed of 130% on the Prusa seems to work fine. If you use '''ABS''', please use the files below to slice for your printer.
* '''3MF slicer project file''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/thin_shield.3mf thin_shield.3mf] and [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4//normal_shield.3mf normal_shield.3mf]. This allows you to choose placement, temperatures etc.
* '''slice yourself''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/fab/thin_shield_with_support.stl thin_shield_with_support.stl] (right click, download or ''save link as...'') Recommended for '''PETG''' and [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/fab/normal_shield_with_support.stl normal_shield_with_support.stl] recommended for '''PLA'''. If you slice the version with support, make sure to have 'enable thin wall detection' in your slicer. The 3mf files already have that enabled.

More files, 3mf and STL you get directly on Github: https://github.com/hzeller/prusa-covid19-shield-remix#cut-to-the-chase-gcode-ready-to-use

==== Other Versions ====

Instead of Prusa RC2 or RC3, please use the version above, as it contains changes we got as feedback from
our local healthcare community.

We're working on a stacked version that prints reliably, but if you want/need to print stacked, as an
exception to the above, you can use the Prusa pre-arranged to print 3 at one time.
* [[:media:COVID19 SHIELD R1 3x.stl|Prusa RC1 (x3)]] STL File
For other arrangements, here's the [https://www.prusaprinters.org/prints/25857-protective-face-shield-rc1 original Prusa design page].

== Laser Cut Parts ==

* [[:media:Wrapover-faceshield-laser.svg|The SVG file for laser cutting the shield part]] SVG File

The shields are cut from 0.020 inch thick PETG sheets. Our base design fits into sheets of 24"x32". If we get donations of larger sheets, then we cut it down before using it.

== Elastic Band ==

Each shield uses approximately 8 inches of button hole elastic, 3/4 inch wide.

Sources
* [https://www.homesew.com/ Home Sew]

== Assembly and Disassembly ==

'''Assembly'''

Assembly requires about 8" of 3/4 wide button hole elastic.

* A short video on [https://youtu.be/qKqDUExM4Q8 how to assemble the Maker Nexus face shield version RC2]

* The original design [https://www.prusaprinters.org/prints/25857-prusa-protective-face-shield-rc2 Prusa RC2 STL- On this page]

Each box of face shields contains a QR Code that links to [[Covid-19 Shield User Instructions]]

'''Disassembly for cleaning'''

These face shields can be taken apart for cleaning.

The sheets are made of PETG and can handle alcohol and UV. The head band and spreader could be made of PETG, ABS, or PLA. These all resist alcohol but are heat sensitive. We are not experts in how to sanitize equipment. You, as user, take responsibility for appropriate sanitization. See [https://help.prusa3d.com/en/article/prusa-face-shield-disinfection_125457#_ga=2.91675610.133084680.1585293016-139199844.1585293016 this page from Prusa Research] for information on sanitization methods currently being tested.

A short video on [https://www.youtube.com/watch?v=F7FFPzGeRME how to take the Maker Nexus face shield apart]

== Help at MN ==
At this time we do not need volunteers in the makerspace itself. The space is on lockdown so that we do not introduce the virus into our work area.

'''Donations Needed'''

* PETG filament is useful - if you aren't able to print yourself. Any color in both 1.75mm and 3mm diameter filament. It should be in a factory sealed box or in a bag with desiccant.
* 3/4"-1" button hole elastic
* 0.020" thick PETG film for disposable masks, sheets or rolls

You can drop-off the donations at Maker Nexus, just leave it in the box by the front door of Maker Nexus. Please use appropriate procedures when packaging - including wearing a new pair of gloves and a face mask if available.

You can also donate via PayPal towards COVID-19 efforts that Maker Nexus is working on. [http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Who to contact'''

MN members join the #covid-faceshield channel on [https://www.makernexus.com/member-dashboard Slack]

If you don't have access to Slack, please email [mailto:faceshields@makernexus.org faceshields@makernexus.org]

== External Links ==

=== Information & Discussions ===
- [https://join.slack.com/t/prusafaceshields/shared_invite/zt-cz809azp-f41jGEYZivRKWH6IcYEmKw External slack for Prusa Shield discussions]

== Status ==
As of 3/29/2020

* We have 15 3D printers at Maker Nexus and 205 printers at homes through out the community.

* We have enough 0.020/0.030 PETg sheets to make about 4000 more shields. This is hard to buy now and we are testing alternatives.

* We have enough filament to keep our printers running and are buying more. Our preferred filament is now on back order and we are sourcing directly from China.

* We are exploring injection molding for the head bands. This may take some time.

* We have shipped over 650 face shields. Yea! That is what it's all about.

3D printed face shields

2020-03-30T02:03:48Z

Hzeller: /* RC2 + MakerNexus extensions (PREFERRED) */

[[File:Face shield front.jpg|200px]] [[File:Face shield side.jpg|350px]] [[File:Face shield top.jpg|350px]]

== Overview ==
Face shields are used by health care professionals to protect them when working with patients. Hospital supplies are running low. While they prefer to use commercially manufactured ones, in this emergency they are looking for alternative sources.

The headband portion of these shields is made on a 3D printer. If you have a 3D printer, you can make these. We have several at Maker Nexus that will be running as long as we have supplies. We deliver them to local hospitals.

* [https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform Sign up to use your own 3D printer] to help
* [https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform Sign up to receive face shields] for your health care facility

'''In the News'''

* A TV segment [https://sanfrancisco.cbslocal.com/video/4495791-maker-community-uses-3-d-printer-to-supply-ppe-to-health-professionals/ from KPIX]
* Watch a short [https://www.ktvu.com/news/covid-19-sunnyvale-company-designing-3d-protective-masks-to-meet-demand KTVU news report about our efforts.]

'''How much do they cost?'''

We give these away, paying for them from donations. We do not sell them. Promises of donations or actual donations do not affect who is prioritized to receive the PPE. The allocation team is not told who has donated. However, they cost us about $5 each to make. Donations are critical for us to be able to keep producing. We will make them until the money runs out.

[http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Is there really a need?'''

* We've heard from friends that "nurses are cutting up plastic soda bottles to make face shields, using saran wrap on top of N95 masks to allow for multi-use."
* One local nurse said they are making face shields from cut up shower curtains and hot glue guns.
* In reviewing the current design: "The nurses were over the moon about how easily the shields can be disassembled and sterilized."
* A nurse from Marin called us and I got her hooked into the allocation process and told her they were free. She started crying on the phone. - JimS

We are ramping up to make 1,000 a week, maybe more.

'''How do I get some?'''

If your health care facility needs face shields, fill in this form:

[https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform?usp=sf_link My Facility Needs Face Shields] (click the link)

A link to [[MN COVID Response|Other COVID Projects]]

== 3D Print Parts At Home ==

=== Use Your 3D Printer for good ===

'''Sign up'''

We are establishing a network of 3D printer owners who can make the headbands for us. You make them and deliver them to our facility where we do the assembly and get them to the hospitals. If you want to be part of our network, fill in this form and we will contact you:

[https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform I want to help make them]

'''Report your progress'''

If you've signed-up and started printing already:
[https://docs.google.com/spreadsheets/d/1Aoq7a0YbkPbGiMZGSxBgo0ySlgDWZHoaCvXc8sx9FU8/edit Keep us updated with your print progress].
Please request permission to access the file if you're prompted to, and we'll respond as quickly as we can.

=== What to do with the finished product ===
When you have parts ready to deliver, please follow the following steps:
# Fill out [https://docs.google.com/forms/d/e/1FAIpQLSdJfZz5M-xxQifJmFBdNQcn7c3i5eFabV7StA5ep9zsJuco9Q/viewform?usp=sf_link this form] with information about your donation (so we can track inventory)
# Seal in plastic bag.
# Label bag with your email, the version of face shield you printed (e.g. "MN 1.3" see releases in parts below; or "RC2" if you used that), the material printed with and the date you closed the bag.
# Mail to
Maker Nexus
234 E. Carribean Drive
Sunnyvale, CA 94089
OR
Deliver to us if you are local and it does not violate the Shelter In Place Order - please do not make a special trip for this - but if you are passing by on your way to get essential groceries and want to drop it off, that is acceptable - there is a box outside our front door where donated parts can be placed.

Please be sure you are following proper sanitation procedures when you bag parts - if possible, wear gloves and a breathing mask, wipe or spray with disinfectant if available. We want to minimize the chance of cross-contamination. After it reaches MN, we will be further disinfecting them before delivering to its end destination.

We are not in a position to supply you with filament. If we are successful at raising more money for this program, then we might be able to give you a new reel when you drop off 20 face shield sets.

== 3D Print Directions ==

=== Materials ===

'''PETG filament Sources'''

These face shields are best done with PETG filament. A 1kg spool can make about 20 units.

* [http://matterhackers.com Matter Hackers]
** 3mm product id # MF3CF7NH 1kg about $25
** 1.75mm product id # M3MY2VQG 1kg about $24 (only $20 each if you buy 5)
** 1.75mm product id # MTVEPT25 10 pounds (4.5kg) about $185 It is a higher quality PETG filament, but is it really worth the extra cost?

'''PETG Sheet Sources'''

One 48x96 inch sheet can make about 24 shields.

* [http://www.piedmontplastics.com Piedmont Plastics] in San Leandro, CA. .020x48x96 CLR VIVAK PETG JFM about $16/sheet.

=== Instructions ===

'''Printer Settings'''

Print with PETG for ease of sanitation - IPA, Hydrogen Peroxide, Bleach, and Acetic Acid up to 10% can all be safely used with PETG.

Print settings:
* Temperature based on filament selection.
* 3 perimeters
* 100% infill
* 0.3mm Draft settings in PrusaSlicer work fine
* we are running our Prusa's at 130% speed

=== Parts ===
We are focusing production on the Prusa RC2 headband with some modification to reduce weight and center the mounting pins, based on feedback from medical professionals.
If your printer is large enough to print this design, PLEASE switch production to that. If your printer cannot accommodate that, RC1 pieces are still helpful. See below for details on each.

==== RC2 + MakerNexus extensions (PREFERRED) ====

The MakerNexus modifications [https://github.com/hzeller/prusa-covid19-shield-remix are on github].

Most important change is that the pins are centered in the headband, so that there is something covering the shield punch, making a better seal.

Easiest is to download the release at https://github.com/hzeller/prusa-covid19-shield-remix/releases (latest is v1.4 from 2020-03-29)

[[File:covid-headband-build-plate.png]]

This archive contains (next to the source files) the following files used used to print, which you also can download here:

* '''Ready-to-go GCode''': [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/fab/thin_shield_0.3mm_PETG_MK3S.gcode thin_shield_0.3mm_PETG_MK3S.gcode] (right click, download or ''save link as...'') for '''PETG''' (preferred), [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/fab/normal_shield_0.3mm_PLA_MK3S.gcode normal_shield_0.3mm_PLA_MK3S.gcode] for '''PLA''' (if that's all you have). This prints two headbands and two bottom stabilizers. Using print-speed of 130% on the Prusa seems to work fine. If you use '''ABS''', please use the files below to slice for your printer.
* '''3MF slicer project file''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/thin_shield.3mf thin_shield.3mf] and [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4//normal_shield.3mf normal_shield.3mf]. This allows you to choose placement, temperatures etc.
* '''slice yourself''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/fab/thin_shield_with_support.stl thin_shield_with_support.stl] (right click, download or ''save link as...'') Recommended for '''PETG''' and [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/fab/normal_shield_with_support.stl normal_shield_with_support.stl] recommended for '''PLA'''. If you slice the version with support, make sure to have 'enable thin wall detection' in your slicer. The 3mf files already have that enabled.

More files, 3mf and STL you get directly on Github: https://github.com/hzeller/prusa-covid19-shield-remix#cut-to-the-chase-gcode-ready-to-use

==== Other Versions ====

Instead of Prusa RC2 or RC3, please use the version above, as it contains changes we got as feedback from
our local healthcare community.

We're working on a stacked version that prints reliably, but if you want/need to print stacked, as an
exception to the above, you can use the Prusa pre-arranged to print 3 at one time.
* [[:media:COVID19 SHIELD R1 3x.stl|Prusa RC1 (x3)]] STL File
For other arrangements, here's the [https://www.prusaprinters.org/prints/25857-protective-face-shield-rc1 original Prusa design page].

== Laser Cut Parts ==

* [[:media:Wrapover-faceshield-laser.svg|The SVG file for laser cutting the shield part]] SVG File

The shields are cut from 0.020 inch thick PETG sheets. Our base design fits into sheets of 24"x32". If we get donations of larger sheets, then we cut it down before using it.

== Elastic Band ==

Each shield uses approximately 8 inches of button hole elastic, 3/4 inch wide.

Sources
* [https://www.homesew.com/ Home Sew]

== Assembly and Disassembly ==

'''Assembly'''

Assembly requires about 8" of 3/4 wide button hole elastic.

* A short video on [https://youtu.be/qKqDUExM4Q8 how to assemble the Maker Nexus face shield version RC2]

* The original design [https://www.prusaprinters.org/prints/25857-prusa-protective-face-shield-rc2 Prusa RC2 STL- On this page]

Each box of face shields contains a QR Code that links to [[Covid-19 Shield User Instructions]]

'''Disassembly for cleaning'''

These face shields can be taken apart for cleaning.

The sheets are made of PETG and can handle alcohol and UV. The head band and spreader could be made of PETG, ABS, or PLA. These all resist alcohol but are heat sensitive. We are not experts in how to sanitize equipment. You, as user, take responsibility for appropriate sanitization. See [https://help.prusa3d.com/en/article/prusa-face-shield-disinfection_125457#_ga=2.91675610.133084680.1585293016-139199844.1585293016 this page from Prusa Research] for information on sanitization methods currently being tested.

A short video on [https://www.youtube.com/watch?v=F7FFPzGeRME how to take the Maker Nexus face shield apart]

== Help at MN ==
At this time we do not need volunteers in the makerspace itself. The space is on lockdown so that we do not introduce the virus into our work area.

'''Donations Needed'''

* PETG filament is useful - if you aren't able to print yourself. Any color in both 1.75mm and 3mm diameter filament. It should be in a factory sealed box or in a bag with desiccant.
* 3/4"-1" button hole elastic
* 0.020" thick PETG film for disposable masks, sheets or rolls

You can drop-off the donations at Maker Nexus, just leave it in the box by the front door of Maker Nexus. Please use appropriate procedures when packaging - including wearing a new pair of gloves and a face mask if available.

You can also donate via PayPal towards COVID-19 efforts that Maker Nexus is working on. [http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Who to contact'''

MN members join the #covid-faceshield channel on [https://www.makernexus.com/member-dashboard Slack]

If you don't have access to Slack, please email [mailto:faceshields@makernexus.org faceshields@makernexus.org]

== External Links ==

=== Information & Discussions ===
- [https://join.slack.com/t/prusafaceshields/shared_invite/zt-cz809azp-f41jGEYZivRKWH6IcYEmKw External slack for Prusa Shield discussions]

== Status ==
As of 3/29/2020

* We have 15 3D printers at Maker Nexus and 205 printers at homes through out the community.

* We have enough 0.020/0.030 PETg sheets to make about 4000 more shields. This is hard to buy now and we are testing alternatives.

* We have enough filament to keep our printers running and are buying more. Our preferred filament is now on back order and we are sourcing directly from China.

* We are exploring injection molding for the head bands. This may take some time.

* We have shipped over 650 face shields. Yea! That is what it's all about.

3D printed face shields

2020-03-30T02:03:27Z

Hzeller: /* RC2 + MakerNexus extensions (PREFERRED) */

[[File:Face shield front.jpg|200px]] [[File:Face shield side.jpg|350px]] [[File:Face shield top.jpg|350px]]

== Overview ==
Face shields are used by health care professionals to protect them when working with patients. Hospital supplies are running low. While they prefer to use commercially manufactured ones, in this emergency they are looking for alternative sources.

The headband portion of these shields is made on a 3D printer. If you have a 3D printer, you can make these. We have several at Maker Nexus that will be running as long as we have supplies. We deliver them to local hospitals.

* [https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform Sign up to use your own 3D printer] to help
* [https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform Sign up to receive face shields] for your health care facility

'''In the News'''

* A TV segment [https://sanfrancisco.cbslocal.com/video/4495791-maker-community-uses-3-d-printer-to-supply-ppe-to-health-professionals/ from KPIX]
* Watch a short [https://www.ktvu.com/news/covid-19-sunnyvale-company-designing-3d-protective-masks-to-meet-demand KTVU news report about our efforts.]

'''How much do they cost?'''

We give these away, paying for them from donations. We do not sell them. Promises of donations or actual donations do not affect who is prioritized to receive the PPE. The allocation team is not told who has donated. However, they cost us about $5 each to make. Donations are critical for us to be able to keep producing. We will make them until the money runs out.

[http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Is there really a need?'''

* We've heard from friends that "nurses are cutting up plastic soda bottles to make face shields, using saran wrap on top of N95 masks to allow for multi-use."
* One local nurse said they are making face shields from cut up shower curtains and hot glue guns.
* In reviewing the current design: "The nurses were over the moon about how easily the shields can be disassembled and sterilized."
* A nurse from Marin called us and I got her hooked into the allocation process and told her they were free. She started crying on the phone. - JimS

We are ramping up to make 1,000 a week, maybe more.

'''How do I get some?'''

If your health care facility needs face shields, fill in this form:

[https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform?usp=sf_link My Facility Needs Face Shields] (click the link)

A link to [[MN COVID Response|Other COVID Projects]]

== 3D Print Parts At Home ==

=== Use Your 3D Printer for good ===

'''Sign up'''

We are establishing a network of 3D printer owners who can make the headbands for us. You make them and deliver them to our facility where we do the assembly and get them to the hospitals. If you want to be part of our network, fill in this form and we will contact you:

[https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform I want to help make them]

'''Report your progress'''

If you've signed-up and started printing already:
[https://docs.google.com/spreadsheets/d/1Aoq7a0YbkPbGiMZGSxBgo0ySlgDWZHoaCvXc8sx9FU8/edit Keep us updated with your print progress].
Please request permission to access the file if you're prompted to, and we'll respond as quickly as we can.

=== What to do with the finished product ===
When you have parts ready to deliver, please follow the following steps:
# Fill out [https://docs.google.com/forms/d/e/1FAIpQLSdJfZz5M-xxQifJmFBdNQcn7c3i5eFabV7StA5ep9zsJuco9Q/viewform?usp=sf_link this form] with information about your donation (so we can track inventory)
# Seal in plastic bag.
# Label bag with your email, the version of face shield you printed (e.g. "MN 1.3" see releases in parts below; or "RC2" if you used that), the material printed with and the date you closed the bag.
# Mail to
Maker Nexus
234 E. Carribean Drive
Sunnyvale, CA 94089
OR
Deliver to us if you are local and it does not violate the Shelter In Place Order - please do not make a special trip for this - but if you are passing by on your way to get essential groceries and want to drop it off, that is acceptable - there is a box outside our front door where donated parts can be placed.

Please be sure you are following proper sanitation procedures when you bag parts - if possible, wear gloves and a breathing mask, wipe or spray with disinfectant if available. We want to minimize the chance of cross-contamination. After it reaches MN, we will be further disinfecting them before delivering to its end destination.

We are not in a position to supply you with filament. If we are successful at raising more money for this program, then we might be able to give you a new reel when you drop off 20 face shield sets.

== 3D Print Directions ==

=== Materials ===

'''PETG filament Sources'''

These face shields are best done with PETG filament. A 1kg spool can make about 20 units.

* [http://matterhackers.com Matter Hackers]
** 3mm product id # MF3CF7NH 1kg about $25
** 1.75mm product id # M3MY2VQG 1kg about $24 (only $20 each if you buy 5)
** 1.75mm product id # MTVEPT25 10 pounds (4.5kg) about $185 It is a higher quality PETG filament, but is it really worth the extra cost?

'''PETG Sheet Sources'''

One 48x96 inch sheet can make about 24 shields.

* [http://www.piedmontplastics.com Piedmont Plastics] in San Leandro, CA. .020x48x96 CLR VIVAK PETG JFM about $16/sheet.

=== Instructions ===

'''Printer Settings'''

Print with PETG for ease of sanitation - IPA, Hydrogen Peroxide, Bleach, and Acetic Acid up to 10% can all be safely used with PETG.

Print settings:
* Temperature based on filament selection.
* 3 perimeters
* 100% infill
* 0.3mm Draft settings in PrusaSlicer work fine
* we are running our Prusa's at 130% speed

=== Parts ===
We are focusing production on the Prusa RC2 headband with some modification to reduce weight and center the mounting pins, based on feedback from medical professionals.
If your printer is large enough to print this design, PLEASE switch production to that. If your printer cannot accommodate that, RC1 pieces are still helpful. See below for details on each.

==== RC2 + MakerNexus extensions (PREFERRED) ====

The MakerNexus modifications [https://github.com/hzeller/prusa-covid19-shield-remix are on github].

Most important change is that the pins are centered in the headband, so that there is something covering the shield punch, making a better seal.

Easiest is to download the release at https://github.com/hzeller/prusa-covid19-shield-remix/releases (latest is v1.4 from 2020-03-29)

[[File:covid-headband-build-plate.png]]

This archive contains (next to the source files) the following files used used to print, which you also can download here:

* '''Ready-to-go GCode''': [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/fab/thin_shield_0.3mm_PETG_MK3S.gcode thin_shield_0.3mm_PETG_MK3S.gcode] (right click, download or ''save link as...'') for '''PETG''' (preferred), [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/fab/normal_shield_0.3mm_PLA_MK3S.gcode normal_shield_0.3mm_PLA_MK3S.gcode] for '''PLA''' (if that's all you have). This prints two headbands and two bottom stabilizers. Using print-speed of 130% on the Prusa seems to work fine. If you use ABS, please use the files below to slice for your printer.
* '''3MF slicer project file''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/thin_shield.3mf thin_shield.3mf] and [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4//normal_shield.3mf normal_shield.3mf]. This allows you to choose placement, temperatures etc.
* '''slice yourself''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/fab/thin_shield_with_support.stl thin_shield_with_support.stl] (right click, download or ''save link as...'') Recommended for '''PETG''' and [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/fab/normal_shield_with_support.stl normal_shield_with_support.stl] recommended for '''PLA'''. If you slice the version with support, make sure to have 'enable thin wall detection' in your slicer. The 3mf files already have that enabled.

More files, 3mf and STL you get directly on Github: https://github.com/hzeller/prusa-covid19-shield-remix#cut-to-the-chase-gcode-ready-to-use

==== Other Versions ====

Instead of Prusa RC2 or RC3, please use the version above, as it contains changes we got as feedback from
our local healthcare community.

We're working on a stacked version that prints reliably, but if you want/need to print stacked, as an
exception to the above, you can use the Prusa pre-arranged to print 3 at one time.
* [[:media:COVID19 SHIELD R1 3x.stl|Prusa RC1 (x3)]] STL File
For other arrangements, here's the [https://www.prusaprinters.org/prints/25857-protective-face-shield-rc1 original Prusa design page].

== Laser Cut Parts ==

* [[:media:Wrapover-faceshield-laser.svg|The SVG file for laser cutting the shield part]] SVG File

The shields are cut from 0.020 inch thick PETG sheets. Our base design fits into sheets of 24"x32". If we get donations of larger sheets, then we cut it down before using it.

== Elastic Band ==

Each shield uses approximately 8 inches of button hole elastic, 3/4 inch wide.

Sources
* [https://www.homesew.com/ Home Sew]

== Assembly and Disassembly ==

'''Assembly'''

Assembly requires about 8" of 3/4 wide button hole elastic.

* A short video on [https://youtu.be/qKqDUExM4Q8 how to assemble the Maker Nexus face shield version RC2]

* The original design [https://www.prusaprinters.org/prints/25857-prusa-protective-face-shield-rc2 Prusa RC2 STL- On this page]

Each box of face shields contains a QR Code that links to [[Covid-19 Shield User Instructions]]

'''Disassembly for cleaning'''

These face shields can be taken apart for cleaning.

The sheets are made of PETG and can handle alcohol and UV. The head band and spreader could be made of PETG, ABS, or PLA. These all resist alcohol but are heat sensitive. We are not experts in how to sanitize equipment. You, as user, take responsibility for appropriate sanitization. See [https://help.prusa3d.com/en/article/prusa-face-shield-disinfection_125457#_ga=2.91675610.133084680.1585293016-139199844.1585293016 this page from Prusa Research] for information on sanitization methods currently being tested.

A short video on [https://www.youtube.com/watch?v=F7FFPzGeRME how to take the Maker Nexus face shield apart]

== Help at MN ==
At this time we do not need volunteers in the makerspace itself. The space is on lockdown so that we do not introduce the virus into our work area.

'''Donations Needed'''

* PETG filament is useful - if you aren't able to print yourself. Any color in both 1.75mm and 3mm diameter filament. It should be in a factory sealed box or in a bag with desiccant.
* 3/4"-1" button hole elastic
* 0.020" thick PETG film for disposable masks, sheets or rolls

You can drop-off the donations at Maker Nexus, just leave it in the box by the front door of Maker Nexus. Please use appropriate procedures when packaging - including wearing a new pair of gloves and a face mask if available.

You can also donate via PayPal towards COVID-19 efforts that Maker Nexus is working on. [http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Who to contact'''

MN members join the #covid-faceshield channel on [https://www.makernexus.com/member-dashboard Slack]

If you don't have access to Slack, please email [mailto:faceshields@makernexus.org faceshields@makernexus.org]

== External Links ==

=== Information & Discussions ===
- [https://join.slack.com/t/prusafaceshields/shared_invite/zt-cz809azp-f41jGEYZivRKWH6IcYEmKw External slack for Prusa Shield discussions]

== Status ==
As of 3/29/2020

* We have 15 3D printers at Maker Nexus and 205 printers at homes through out the community.

* We have enough 0.020/0.030 PETg sheets to make about 4000 more shields. This is hard to buy now and we are testing alternatives.

* We have enough filament to keep our printers running and are buying more. Our preferred filament is now on back order and we are sourcing directly from China.

* We are exploring injection molding for the head bands. This may take some time.

* We have shipped over 650 face shields. Yea! That is what it's all about.

3D printed face shields

2020-03-30T01:57:12Z

Hzeller: /* RC2 + MakerNexus extensions (PREFERRED) */

[[File:Face shield front.jpg|200px]] [[File:Face shield side.jpg|350px]] [[File:Face shield top.jpg|350px]]

== Overview ==
Face shields are used by health care professionals to protect them when working with patients. Hospital supplies are running low. While they prefer to use commercially manufactured ones, in this emergency they are looking for alternative sources.

The headband portion of these shields is made on a 3D printer. If you have a 3D printer, you can make these. We have several at Maker Nexus that will be running as long as we have supplies. We deliver them to local hospitals.

* [https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform Sign up to use your own 3D printer] to help
* [https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform Sign up to receive face shields] for your health care facility

'''In the News'''

* A TV segment [https://sanfrancisco.cbslocal.com/video/4495791-maker-community-uses-3-d-printer-to-supply-ppe-to-health-professionals/ from KPIX]
* Watch a short [https://www.ktvu.com/news/covid-19-sunnyvale-company-designing-3d-protective-masks-to-meet-demand KTVU news report about our efforts.]

'''How much do they cost?'''

We give these away, paying for them from donations. We do not sell them. Promises of donations or actual donations do not affect who is prioritized to receive the PPE. The allocation team is not told who has donated. However, they cost us about $5 each to make. Donations are critical for us to be able to keep producing. We will make them until the money runs out.

[http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Is there really a need?'''

* We've heard from friends that "nurses are cutting up plastic soda bottles to make face shields, using saran wrap on top of N95 masks to allow for multi-use."
* One local nurse said they are making face shields from cut up shower curtains and hot glue guns.
* In reviewing the current design: "The nurses were over the moon about how easily the shields can be disassembled and sterilized."
* A nurse from Marin called us and I got her hooked into the allocation process and told her they were free. She started crying on the phone. - JimS

We are ramping up to make 1,000 a week, maybe more.

'''How do I get some?'''

If your health care facility needs face shields, fill in this form:

[https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform?usp=sf_link My Facility Needs Face Shields] (click the link)

A link to [[MN COVID Response|Other COVID Projects]]

== 3D Print Parts At Home ==

=== Use Your 3D Printer for good ===

'''Sign up'''

We are establishing a network of 3D printer owners who can make the headbands for us. You make them and deliver them to our facility where we do the assembly and get them to the hospitals. If you want to be part of our network, fill in this form and we will contact you:

[https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform I want to help make them]

'''Report your progress'''

If you've signed-up and started printing already:
[https://docs.google.com/spreadsheets/d/1Aoq7a0YbkPbGiMZGSxBgo0ySlgDWZHoaCvXc8sx9FU8/edit Keep us updated with your print progress].
Please request permission to access the file if you're prompted to, and we'll respond as quickly as we can.

=== What to do with the finished product ===
When you have parts ready to deliver, please follow the following steps:
# Fill out [https://docs.google.com/forms/d/e/1FAIpQLSdJfZz5M-xxQifJmFBdNQcn7c3i5eFabV7StA5ep9zsJuco9Q/viewform?usp=sf_link this form] with information about your donation (so we can track inventory)
# Seal in plastic bag.
# Label bag with your email, the version of face shield you printed (e.g. "MN 1.3" see releases in parts below; or "RC2" if you used that), the material printed with and the date you closed the bag.
# Mail to
Maker Nexus
234 E. Carribean Drive
Sunnyvale, CA 94089
OR
Deliver to us if you are local and it does not violate the Shelter In Place Order - please do not make a special trip for this - but if you are passing by on your way to get essential groceries and want to drop it off, that is acceptable - there is a box outside our front door where donated parts can be placed.

Please be sure you are following proper sanitation procedures when you bag parts - if possible, wear gloves and a breathing mask, wipe or spray with disinfectant if available. We want to minimize the chance of cross-contamination. After it reaches MN, we will be further disinfecting them before delivering to its end destination.

We are not in a position to supply you with filament. If we are successful at raising more money for this program, then we might be able to give you a new reel when you drop off 20 face shield sets.

== 3D Print Directions ==

=== Materials ===

'''PETG filament Sources'''

These face shields are best done with PETG filament. A 1kg spool can make about 20 units.

* [http://matterhackers.com Matter Hackers]
** 3mm product id # MF3CF7NH 1kg about $25
** 1.75mm product id # M3MY2VQG 1kg about $24 (only $20 each if you buy 5)
** 1.75mm product id # MTVEPT25 10 pounds (4.5kg) about $185 It is a higher quality PETG filament, but is it really worth the extra cost?

'''PETG Sheet Sources'''

One 48x96 inch sheet can make about 24 shields.

* [http://www.piedmontplastics.com Piedmont Plastics] in San Leandro, CA. .020x48x96 CLR VIVAK PETG JFM about $16/sheet.

=== Instructions ===

'''Printer Settings'''

Print with PETG for ease of sanitation - IPA, Hydrogen Peroxide, Bleach, and Acetic Acid up to 10% can all be safely used with PETG.

Print settings:
* Temperature based on filament selection.
* 3 perimeters
* 100% infill
* 0.3mm Draft settings in PrusaSlicer work fine
* we are running our Prusa's at 130% speed

=== Parts ===
We are focusing production on the Prusa RC2 headband with some modification to reduce weight and center the mounting pins, based on feedback from medical professionals.
If your printer is large enough to print this design, PLEASE switch production to that. If your printer cannot accommodate that, RC1 pieces are still helpful. See below for details on each.

==== RC2 + MakerNexus extensions (PREFERRED) ====

The MakerNexus modifications [https://github.com/hzeller/prusa-covid19-shield-remix are on github].

Most important change is that the pins are centered in the headband, so that there is something covering the shield punch, making a better seal.

Easiest is to download the release at https://github.com/hzeller/prusa-covid19-shield-remix/releases (latest is v1.4 from 2020-03-29)

[[File:covid-headband-build-plate.png]]

This archive contains (next to the source files) the following files used used to print, which you also can download here:

* '''Ready-to-go GCode''': [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/fab/thin_shield_0.3mm_PETG_MK3S.gcode thin_shield_0.3mm_PETG_MK3S.gcode] (right click, download or ''save link as...'') for '''PETG''' (preferred), [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/fab/normal_shield_0.3mm_PLA_MK3S.gcode normal_shield_0.3mm_PLA_MK3S.gcode] for '''PLA''' (if that's all you have). This prints two headbands and two bottom stabilizers. Using print-speed of 130% on the Prusa seems to work fine.
* '''3MF slicer project file''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/thin_shield.3mf thin_shield.3mf] and [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4//normal_shield.3mf normal_shield.3mf]. This allows you to choose placement, temperatures etc.
* '''slice yourself''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/fab/thin_shield_with_support.stl thin_shield_with_support.stl] (right click, download or ''save link as...'') Recommended for '''PETG''' and [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/fab/normal_shield_with_support.stl normal_shield_with_support.stl] recommended for '''PLA'''. If you slice the version with support, make sure to have 'enable thin wall detection' in your slicer. The 3mf files already have that enabled.

More files, 3mf and STL you get directly on Github: https://github.com/hzeller/prusa-covid19-shield-remix#cut-to-the-chase-gcode-ready-to-use

==== Other Versions ====

Instead of Prusa RC2 or RC3, please use the version above, as it contains changes we got as feedback from
our local healthcare community.

We're working on a stacked version that prints reliably, but if you want/need to print stacked, as an
exception to the above, you can use the Prusa pre-arranged to print 3 at one time.
* [[:media:COVID19 SHIELD R1 3x.stl|Prusa RC1 (x3)]] STL File
For other arrangements, here's the [https://www.prusaprinters.org/prints/25857-protective-face-shield-rc1 original Prusa design page].

== Laser Cut Parts ==

* [[:media:Wrapover-faceshield-laser.svg|The SVG file for laser cutting the shield part]] SVG File

The shields are cut from 0.020 inch thick PETG sheets. Our base design fits into sheets of 24"x32". If we get donations of larger sheets, then we cut it down before using it.

== Elastic Band ==

Each shield uses approximately 8 inches of button hole elastic, 3/4 inch wide.

Sources
* [https://www.homesew.com/ Home Sew]

== Assembly and Disassembly ==

'''Assembly'''

Assembly requires about 8" of 3/4 wide button hole elastic.

* A short video on [https://youtu.be/qKqDUExM4Q8 how to assemble the Maker Nexus face shield version RC2]

* The original design [https://www.prusaprinters.org/prints/25857-prusa-protective-face-shield-rc2 Prusa RC2 STL- On this page]

Each box of face shields contains a QR Code that links to [[Covid-19 Shield User Instructions]]

'''Disassembly for cleaning'''

These face shields can be taken apart for cleaning.

The sheets are made of PETG and can handle alcohol and UV. The head band and spreader could be made of PETG, ABS, or PLA. These all resist alcohol but are heat sensitive. We are not experts in how to sanitize equipment. You, as user, take responsibility for appropriate sanitization. See [https://help.prusa3d.com/en/article/prusa-face-shield-disinfection_125457#_ga=2.91675610.133084680.1585293016-139199844.1585293016 this page from Prusa Research] for information on sanitization methods currently being tested.

A short video on [https://www.youtube.com/watch?v=F7FFPzGeRME how to take the Maker Nexus face shield apart]

== Help at MN ==
At this time we do not need volunteers in the makerspace itself. The space is on lockdown so that we do not introduce the virus into our work area.

'''Donations Needed'''

* PETG filament is useful - if you aren't able to print yourself. Any color in both 1.75mm and 3mm diameter filament. It should be in a factory sealed box or in a bag with desiccant.
* 3/4"-1" button hole elastic
* 0.020" thick PETG film for disposable masks, sheets or rolls

You can drop-off the donations at Maker Nexus, just leave it in the box by the front door of Maker Nexus. Please use appropriate procedures when packaging - including wearing a new pair of gloves and a face mask if available.

You can also donate via PayPal towards COVID-19 efforts that Maker Nexus is working on. [http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Who to contact'''

MN members join the #covid-faceshield channel on [https://www.makernexus.com/member-dashboard Slack]

If you don't have access to Slack, please email [mailto:faceshields@makernexus.org faceshields@makernexus.org]

== External Links ==

=== Information & Discussions ===
- [https://join.slack.com/t/prusafaceshields/shared_invite/zt-cz809azp-f41jGEYZivRKWH6IcYEmKw External slack for Prusa Shield discussions]

== Status ==
As of 3/29/2020

* We have 15 3D printers at Maker Nexus and 205 printers at homes through out the community.

* We have enough 0.020/0.030 PETg sheets to make about 4000 more shields. This is hard to buy now and we are testing alternatives.

* We have enough filament to keep our printers running and are buying more. Our preferred filament is now on back order and we are sourcing directly from China.

* We are exploring injection molding for the head bands. This may take some time.

* We have shipped over 650 face shields. Yea! That is what it's all about.

3D printed face shields

2020-03-30T01:32:56Z

Hzeller: /* RC2 + MakerNexus extensions (PREFERRED) */

[[File:Face shield front.jpg|200px]] [[File:Face shield side.jpg|350px]] [[File:Face shield top.jpg|350px]]

== Overview ==
Face shields are used by health care professionals to protect them when working with patients. Hospital supplies are running low. While they prefer to use commercially manufactured ones, in this emergency they are looking for alternative sources.

The headband portion of these shields is made on a 3D printer. If you have a 3D printer, you can make these. We have several at Maker Nexus that will be running as long as we have supplies. We deliver them to local hospitals.

* [https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform Sign up to use your own 3D printer] to help
* [https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform Sign up to receive face shields] for your health care facility

'''In the News'''

* A TV segment [https://sanfrancisco.cbslocal.com/video/4495791-maker-community-uses-3-d-printer-to-supply-ppe-to-health-professionals/ from KPIX]
* Watch a short [https://www.ktvu.com/news/covid-19-sunnyvale-company-designing-3d-protective-masks-to-meet-demand KTVU news report about our efforts.]

'''How much do they cost?'''

We give these away, paying for them from donations. We do not sell them. Promises of donations or actual donations do not affect who is prioritized to receive the PPE. The allocation team is not told who has donated. However, they cost us about $5 each to make. Donations are critical for us to be able to keep producing. We will make them until the money runs out.

[http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Is there really a need?'''

* We've heard from friends that "nurses are cutting up plastic soda bottles to make face shields, using saran wrap on top of N95 masks to allow for multi-use."
* One local nurse said they are making face shields from cut up shower curtains and hot glue guns.
* In reviewing the current design: "The nurses were over the moon about how easily the shields can be disassembled and sterilized."
* A nurse from Marin called us and I got her hooked into the allocation process and told her they were free. She started crying on the phone. - JimS

We are ramping up to make 1,000 a week, maybe more.

'''How do I get some?'''

If your health care facility needs face shields, fill in this form:

[https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform?usp=sf_link My Facility Needs Face Shields] (click the link)

A link to [[MN COVID Response|Other COVID Projects]]

== 3D Print Parts At Home ==

=== Use Your 3D Printer for good ===

'''Sign up'''

We are establishing a network of 3D printer owners who can make the headbands for us. You make them and deliver them to our facility where we do the assembly and get them to the hospitals. If you want to be part of our network, fill in this form and we will contact you:

[https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform I want to help make them]

'''Report your progress'''

If you've signed-up and started printing already:
[https://docs.google.com/spreadsheets/d/1Aoq7a0YbkPbGiMZGSxBgo0ySlgDWZHoaCvXc8sx9FU8/edit Keep us updated with your print progress].
Please request permission to access the file if you're prompted to, and we'll respond as quickly as we can.

=== What to do with the finished product ===
When you have parts ready to deliver, please follow the following steps:
# Fill out [https://docs.google.com/forms/d/e/1FAIpQLSdJfZz5M-xxQifJmFBdNQcn7c3i5eFabV7StA5ep9zsJuco9Q/viewform?usp=sf_link this form] with information about your donation (so we can track inventory)
# Seal in plastic bag.
# Label bag with your email, the version of face shield you printed (e.g. "MN 1.3" see releases in parts below; or "RC2" if you used that), the material printed with and the date you closed the bag.
# Mail to
Maker Nexus
234 E. Carribean Drive
Sunnyvale, CA 94089
OR
Deliver to us if you are local and it does not violate the Shelter In Place Order - please do not make a special trip for this - but if you are passing by on your way to get essential groceries and want to drop it off, that is acceptable - there is a box outside our front door where donated parts can be placed.

Please be sure you are following proper sanitation procedures when you bag parts - if possible, wear gloves and a breathing mask, wipe or spray with disinfectant if available. We want to minimize the chance of cross-contamination. After it reaches MN, we will be further disinfecting them before delivering to its end destination.

We are not in a position to supply you with filament. If we are successful at raising more money for this program, then we might be able to give you a new reel when you drop off 20 face shield sets.

== 3D Print Directions ==

=== Materials ===

'''PETG filament Sources'''

These face shields are best done with PETG filament. A 1kg spool can make about 20 units.

* [http://matterhackers.com Matter Hackers]
** 3mm product id # MF3CF7NH 1kg about $25
** 1.75mm product id # M3MY2VQG 1kg about $24 (only $20 each if you buy 5)
** 1.75mm product id # MTVEPT25 10 pounds (4.5kg) about $185 It is a higher quality PETG filament, but is it really worth the extra cost?

'''PETG Sheet Sources'''

One 48x96 inch sheet can make about 24 shields.

* [http://www.piedmontplastics.com Piedmont Plastics] in San Leandro, CA. .020x48x96 CLR VIVAK PETG JFM about $16/sheet.

=== Instructions ===

'''Printer Settings'''

Print with PETG for ease of sanitation - IPA, Hydrogen Peroxide, Bleach, and Acetic Acid up to 10% can all be safely used with PETG.

Print settings:
* Temperature based on filament selection.
* 3 perimeters
* 100% infill
* 0.3mm Draft settings in PrusaSlicer work fine
* we are running our Prusa's at 130% speed

=== Parts ===
We are focusing production on the Prusa RC2 headband with some modification to reduce weight and center the mounting pins, based on feedback from medical professionals.
If your printer is large enough to print this design, PLEASE switch production to that. If your printer cannot accommodate that, RC1 pieces are still helpful. See below for details on each.

==== RC2 + MakerNexus extensions (PREFERRED) ====

The MakerNexus modifications [https://github.com/hzeller/prusa-covid19-shield-remix are on github].

Most important change is that the pins are centered in the headband, so that there is something covering the shield punch, making a better seal.

Easiest is to download the release at https://github.com/hzeller/prusa-covid19-shield-remix/releases (latest is v1.4 from 2020-03-29)

[[File:covid-headband-build-plate.png]]

This archive contains (next to the source files) the following files used used to print, which you also can download here:

* '''Ready-to-go GCode''': [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/fab/thin_shield_0.3mm_PETG_MK3S.gcode thin_shield_0.3mm_PETG_MK3S.gcode] (right click, download or ''save link as...'') for '''PETG''' (preferred), [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/fab/normal_shield_0.3mm_PLA_MK3S.gcode normal_shield_0.3mm_PLA_MK3S.gcode] for '''PLA''' (if that's all you have). This prints two headbands and two bottom stabilizers. Using print-speed of 130% on the Prusa seems to work fine.

* '''slice yourself''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/fab/thin_shield_with_support.stl thin_shield_with_support.stl] (right click, download or ''save link as...'') Recommended for '''PETG''' and [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/fab/normal_shield_with_support.stl normal_shield_with_support.stl] recommended for '''PLA'''

More files, 3mf and STL you get directly on Github: https://github.com/hzeller/prusa-covid19-shield-remix#cut-to-the-chase-gcode-ready-to-use

==== Other Versions ====

Instead of Prusa RC2 or RC3, please use the version above, as it contains changes we got as feedback from
our local healthcare community.

We're working on a stacked version that prints reliably, but if you want/need to print stacked, as an
exception to the above, you can use the Prusa pre-arranged to print 3 at one time.
* [[:media:COVID19 SHIELD R1 3x.stl|Prusa RC1 (x3)]] STL File
For other arrangements, here's the [https://www.prusaprinters.org/prints/25857-protective-face-shield-rc1 original Prusa design page].

== Laser Cut Parts ==

* [[:media:Wrapover-faceshield-laser.svg|The SVG file for laser cutting the shield part]] SVG File

The shields are cut from 0.020 inch thick PETG sheets. Our base design fits into sheets of 24"x32". If we get donations of larger sheets, then we cut it down before using it.

== Elastic Band ==

Each shield uses approximately 8 inches of button hole elastic, 3/4 inch wide.

Sources
* [https://www.homesew.com/ Home Sew]

== Assembly and Disassembly ==

'''Assembly'''

Assembly requires about 8" of 3/4 wide button hole elastic.

* A short video on [https://youtu.be/qKqDUExM4Q8 how to assemble the Maker Nexus face shield version RC2]

* The original design [https://www.prusaprinters.org/prints/25857-prusa-protective-face-shield-rc2 Prusa RC2 STL- On this page]

Each box of face shields contains a QR Code that links to [[Covid-19 Shield User Instructions]]

'''Disassembly for cleaning'''

These face shields can be taken apart for cleaning.

The sheets are made of PETG and can handle alcohol and UV. The head band and spreader could be made of PETG, ABS, or PLA. These all resist alcohol but are heat sensitive. We are not experts in how to sanitize equipment. You, as user, take responsibility for appropriate sanitization. See [https://help.prusa3d.com/en/article/prusa-face-shield-disinfection_125457#_ga=2.91675610.133084680.1585293016-139199844.1585293016 this page from Prusa Research] for information on sanitization methods currently being tested.

A short video on [https://www.youtube.com/watch?v=F7FFPzGeRME how to take the Maker Nexus face shield apart]

== Help at MN ==
At this time we do not need volunteers in the makerspace itself. The space is on lockdown so that we do not introduce the virus into our work area.

'''Donations Needed'''

* PETG filament is useful - if you aren't able to print yourself. Any color in both 1.75mm and 3mm diameter filament. It should be in a factory sealed box or in a bag with desiccant.
* 3/4"-1" button hole elastic
* 0.020" thick PETG film for disposable masks, sheets or rolls

You can drop-off the donations at Maker Nexus, just leave it in the box by the front door of Maker Nexus. Please use appropriate procedures when packaging - including wearing a new pair of gloves and a face mask if available.

You can also donate via PayPal towards COVID-19 efforts that Maker Nexus is working on. [http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Who to contact'''

MN members join the #covid-faceshield channel on [https://www.makernexus.com/member-dashboard Slack]

If you don't have access to Slack, please email [mailto:faceshields@makernexus.org faceshields@makernexus.org]

== External Links ==

=== Information & Discussions ===
- [https://join.slack.com/t/prusafaceshields/shared_invite/zt-cz809azp-f41jGEYZivRKWH6IcYEmKw External slack for Prusa Shield discussions]

== Status ==
As of 3/29/2020

* We have 15 3D printers at Maker Nexus and 205 printers at homes through out the community.

* We have enough 0.020/0.030 PETg sheets to make about 4000 more shields. This is hard to buy now and we are testing alternatives.

* We have enough filament to keep our printers running and are buying more. Our preferred filament is now on back order and we are sourcing directly from China.

* We are exploring injection molding for the head bands. This may take some time.

* We have shipped over 650 face shields. Yea! That is what it's all about.

3D printed face shields

2020-03-30T01:20:51Z

Hzeller: /* RC2 + MakerNexus extensions (PREFERRED) */

[[File:Face shield front.jpg|200px]] [[File:Face shield side.jpg|350px]] [[File:Face shield top.jpg|350px]]

== Overview ==
Face shields are used by health care professionals to protect them when working with patients. Hospital supplies are running low. While they prefer to use commercially manufactured ones, in this emergency they are looking for alternative sources.

The headband portion of these shields is made on a 3D printer. If you have a 3D printer, you can make these. We have several at Maker Nexus that will be running as long as we have supplies. We deliver them to local hospitals.

* [https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform Sign up to use your own 3D printer] to help
* [https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform Sign up to receive face shields] for your health care facility

'''In the News'''

* A TV segment [https://sanfrancisco.cbslocal.com/video/4495791-maker-community-uses-3-d-printer-to-supply-ppe-to-health-professionals/ from KPIX]
* Watch a short [https://www.ktvu.com/news/covid-19-sunnyvale-company-designing-3d-protective-masks-to-meet-demand KTVU news report about our efforts.]

'''How much do they cost?'''

We give these away, paying for them from donations. We do not sell them. Promises of donations or actual donations do not affect who is prioritized to receive the PPE. The allocation team is not told who has donated. However, they cost us about $5 each to make. Donations are critical for us to be able to keep producing. We will make them until the money runs out.

[http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Is there really a need?'''

* We've heard from friends that "nurses are cutting up plastic soda bottles to make face shields, using saran wrap on top of N95 masks to allow for multi-use."
* One local nurse said they are making face shields from cut up shower curtains and hot glue guns.
* In reviewing the current design: "The nurses were over the moon about how easily the shields can be disassembled and sterilized."
* A nurse from Marin called us and I got her hooked into the allocation process and told her they were free. She started crying on the phone. - JimS

We are ramping up to make 1,000 a week, maybe more.

'''How do I get some?'''

If your health care facility needs face shields, fill in this form:

[https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform?usp=sf_link My Facility Needs Face Shields] (click the link)

A link to [[MN COVID Response|Other COVID Projects]]

== 3D Print Parts At Home ==

=== Use Your 3D Printer for good ===

'''Sign up'''

We are establishing a network of 3D printer owners who can make the headbands for us. You make them and deliver them to our facility where we do the assembly and get them to the hospitals. If you want to be part of our network, fill in this form and we will contact you:

[https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform I want to help make them]

'''Report your progress'''

If you've signed-up and started printing already:
[https://docs.google.com/spreadsheets/d/1Aoq7a0YbkPbGiMZGSxBgo0ySlgDWZHoaCvXc8sx9FU8/edit Keep us updated with your print progress].
Please request permission to access the file if you're prompted to, and we'll respond as quickly as we can.

=== What to do with the finished product ===
When you have parts ready to deliver, please follow the following steps:
# Fill out [https://docs.google.com/forms/d/e/1FAIpQLSdJfZz5M-xxQifJmFBdNQcn7c3i5eFabV7StA5ep9zsJuco9Q/viewform?usp=sf_link this form] with information about your donation (so we can track inventory)
# Seal in plastic bag.
# Label bag with your email, the version of face shield you printed (e.g. "MN 1.3" see releases in parts below; or "RC2" if you used that), the material printed with and the date you closed the bag.
# Mail to
Maker Nexus
234 E. Carribean Drive
Sunnyvale, CA 94089
OR
Deliver to us if you are local and it does not violate the Shelter In Place Order - please do not make a special trip for this - but if you are passing by on your way to get essential groceries and want to drop it off, that is acceptable - there is a box outside our front door where donated parts can be placed.

Please be sure you are following proper sanitation procedures when you bag parts - if possible, wear gloves and a breathing mask, wipe or spray with disinfectant if available. We want to minimize the chance of cross-contamination. After it reaches MN, we will be further disinfecting them before delivering to its end destination.

We are not in a position to supply you with filament. If we are successful at raising more money for this program, then we might be able to give you a new reel when you drop off 20 face shield sets.

== 3D Print Directions ==

=== Materials ===

'''PETG filament Sources'''

These face shields are best done with PETG filament. A 1kg spool can make about 20 units.

* [http://matterhackers.com Matter Hackers]
** 3mm product id # MF3CF7NH 1kg about $25
** 1.75mm product id # M3MY2VQG 1kg about $24 (only $20 each if you buy 5)
** 1.75mm product id # MTVEPT25 10 pounds (4.5kg) about $185 It is a higher quality PETG filament, but is it really worth the extra cost?

'''PETG Sheet Sources'''

One 48x96 inch sheet can make about 24 shields.

* [http://www.piedmontplastics.com Piedmont Plastics] in San Leandro, CA. .020x48x96 CLR VIVAK PETG JFM about $16/sheet.

=== Instructions ===

'''Printer Settings'''

Print with PETG for ease of sanitation - IPA, Hydrogen Peroxide, Bleach, and Acetic Acid up to 10% can all be safely used with PETG.

Print settings:
* Temperature based on filament selection.
* 3 perimeters
* 100% infill
* 0.3mm Draft settings in PrusaSlicer work fine
* we are running our Prusa's at 130% speed

=== Parts ===
We are focusing production on the Prusa RC2 headband with some modification to reduce weight and center the mounting pins, based on feedback from medical professionals.
If your printer is large enough to print this design, PLEASE switch production to that. If your printer cannot accommodate that, RC1 pieces are still helpful. See below for details on each.

==== RC2 + MakerNexus extensions (PREFERRED) ====

The MakerNexus modifications [https://github.com/hzeller/prusa-covid19-shield-remix are on github].
Easiest is to download the release at https://github.com/hzeller/prusa-covid19-shield-remix/releases (latest is v1.4 from 2020-03-29)

[[File:covid-headband-build-plate.png]]

This archive contains (next to the source files) the following files used used to print, which you also can download here:

* '''Ready-to-go GCode''': [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/fab/thin_shield_0.3mm_PETG_MK3S.gcode thin_shield_0.3mm_PETG_MK3S.gcode] (right click, download or ''save link as...'') for '''PETG''' (preferred), [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/fab/normal_shield_0.3mm_PLA_MK3S.gcode normal_shield_0.3mm_PLA_MK3S.gcode] for '''PLA''' (if that's all you have). This prints two headbands and two bottom stabilizers. Using print-speed of 130% on the Prusa seems to work fine.

* '''slice yourself''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/fab/thin_shield_with_support.stl thin_shield_with_support.stl] (right click, download or ''save link as...'') Recommended for '''PETG''' and [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/fab/normal_shield_with_support.stl normal_shield_with_support.stl] recommended for '''PLA'''

More files, 3mf and STL you get directly on Github: https://github.com/hzeller/prusa-covid19-shield-remix#cut-to-the-chase-gcode-ready-to-use

==== Other Versions ====

Instead of Prusa RC2 or RC3, please use the version above, as it contains changes we got as feedback from
our local healthcare community.

We're working on a stacked version that prints reliably, but if you want/need to print stacked, as an
exception to the above, you can use the Prusa pre-arranged to print 3 at one time.
* [[:media:COVID19 SHIELD R1 3x.stl|Prusa RC1 (x3)]] STL File
For other arrangements, here's the [https://www.prusaprinters.org/prints/25857-protective-face-shield-rc1 original Prusa design page].

== Laser Cut Parts ==

* [[:media:Wrapover-faceshield-laser.svg|The SVG file for laser cutting the shield part]] SVG File

The shields are cut from 0.020 inch thick PETG sheets. Our base design fits into sheets of 24"x32". If we get donations of larger sheets, then we cut it down before using it.

== Elastic Band ==

Each shield uses approximately 8 inches of button hole elastic, 3/4 inch wide.

Sources
* [https://www.homesew.com/ Home Sew]

== Assembly and Disassembly ==

'''Assembly'''

Assembly requires about 8" of 3/4 wide button hole elastic.

* A short video on [https://youtu.be/qKqDUExM4Q8 how to assemble the Maker Nexus face shield version RC2]

* The original design [https://www.prusaprinters.org/prints/25857-prusa-protective-face-shield-rc2 Prusa RC2 STL- On this page]

Each box of face shields contains a QR Code that links to [[Covid-19 Shield User Instructions]]

'''Disassembly for cleaning'''

These face shields can be taken apart for cleaning.

The sheets are made of PETG and can handle alcohol and UV. The head band and spreader could be made of PETG, ABS, or PLA. These all resist alcohol but are heat sensitive. We are not experts in how to sanitize equipment. You, as user, take responsibility for appropriate sanitization. See [https://help.prusa3d.com/en/article/prusa-face-shield-disinfection_125457#_ga=2.91675610.133084680.1585293016-139199844.1585293016 this page from Prusa Research] for information on sanitization methods currently being tested.

A short video on [https://www.youtube.com/watch?v=F7FFPzGeRME how to take the Maker Nexus face shield apart]

== Help at MN ==
At this time we do not need volunteers in the makerspace itself. The space is on lockdown so that we do not introduce the virus into our work area.

'''Donations Needed'''

* PETG filament is useful - if you aren't able to print yourself. Any color in both 1.75mm and 3mm diameter filament. It should be in a factory sealed box or in a bag with desiccant.
* 3/4"-1" button hole elastic
* 0.020" thick PETG film for disposable masks, sheets or rolls

You can drop-off the donations at Maker Nexus, just leave it in the box by the front door of Maker Nexus. Please use appropriate procedures when packaging - including wearing a new pair of gloves and a face mask if available.

You can also donate via PayPal towards COVID-19 efforts that Maker Nexus is working on. [http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Who to contact'''

MN members join the #covid-faceshield channel on [https://www.makernexus.com/member-dashboard Slack]

If you don't have access to Slack, please email [mailto:faceshields@makernexus.org faceshields@makernexus.org]

== External Links ==

=== Information & Discussions ===
- [https://join.slack.com/t/prusafaceshields/shared_invite/zt-cz809azp-f41jGEYZivRKWH6IcYEmKw External slack for Prusa Shield discussions]

== Status ==
As of 3/29/2020

* We have 15 3D printers at Maker Nexus and 205 printers at homes through out the community.

* We have enough 0.020/0.030 PETg sheets to make about 4000 more shields. This is hard to buy now and we are testing alternatives.

* We have enough filament to keep our printers running and are buying more. Our preferred filament is now on back order and we are sourcing directly from China.

* We are exploring injection molding for the head bands. This may take some time.

* We have shipped over 650 face shields. Yea! That is what it's all about.

3D printed face shields

2020-03-30T01:19:36Z

Hzeller: /* RC2 + MakerNexus extensions (PREFERRED) */

[[File:Face shield front.jpg|200px]] [[File:Face shield side.jpg|350px]] [[File:Face shield top.jpg|350px]]

== Overview ==
Face shields are used by health care professionals to protect them when working with patients. Hospital supplies are running low. While they prefer to use commercially manufactured ones, in this emergency they are looking for alternative sources.

The headband portion of these shields is made on a 3D printer. If you have a 3D printer, you can make these. We have several at Maker Nexus that will be running as long as we have supplies. We deliver them to local hospitals.

* [https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform Sign up to use your own 3D printer] to help
* [https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform Sign up to receive face shields] for your health care facility

'''In the News'''

* A TV segment [https://sanfrancisco.cbslocal.com/video/4495791-maker-community-uses-3-d-printer-to-supply-ppe-to-health-professionals/ from KPIX]
* Watch a short [https://www.ktvu.com/news/covid-19-sunnyvale-company-designing-3d-protective-masks-to-meet-demand KTVU news report about our efforts.]

'''How much do they cost?'''

We give these away, paying for them from donations. We do not sell them. Promises of donations or actual donations do not affect who is prioritized to receive the PPE. The allocation team is not told who has donated. However, they cost us about $5 each to make. Donations are critical for us to be able to keep producing. We will make them until the money runs out.

[http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Is there really a need?'''

* We've heard from friends that "nurses are cutting up plastic soda bottles to make face shields, using saran wrap on top of N95 masks to allow for multi-use."
* One local nurse said they are making face shields from cut up shower curtains and hot glue guns.
* In reviewing the current design: "The nurses were over the moon about how easily the shields can be disassembled and sterilized."
* A nurse from Marin called us and I got her hooked into the allocation process and told her they were free. She started crying on the phone. - JimS

We are ramping up to make 1,000 a week, maybe more.

'''How do I get some?'''

If your health care facility needs face shields, fill in this form:

[https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform?usp=sf_link My Facility Needs Face Shields] (click the link)

A link to [[MN COVID Response|Other COVID Projects]]

== 3D Print Parts At Home ==

=== Use Your 3D Printer for good ===

'''Sign up'''

We are establishing a network of 3D printer owners who can make the headbands for us. You make them and deliver them to our facility where we do the assembly and get them to the hospitals. If you want to be part of our network, fill in this form and we will contact you:

[https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform I want to help make them]

'''Report your progress'''

If you've signed-up and started printing already:
[https://docs.google.com/spreadsheets/d/1Aoq7a0YbkPbGiMZGSxBgo0ySlgDWZHoaCvXc8sx9FU8/edit Keep us updated with your print progress].
Please request permission to access the file if you're prompted to, and we'll respond as quickly as we can.

=== What to do with the finished product ===
When you have parts ready to deliver, please follow the following steps:
# Fill out [https://docs.google.com/forms/d/e/1FAIpQLSdJfZz5M-xxQifJmFBdNQcn7c3i5eFabV7StA5ep9zsJuco9Q/viewform?usp=sf_link this form] with information about your donation (so we can track inventory)
# Seal in plastic bag.
# Label bag with your email, the version of face shield you printed (e.g. "MN 1.3" see releases in parts below; or "RC2" if you used that), the material printed with and the date you closed the bag.
# Mail to
Maker Nexus
234 E. Carribean Drive
Sunnyvale, CA 94089
OR
Deliver to us if you are local and it does not violate the Shelter In Place Order - please do not make a special trip for this - but if you are passing by on your way to get essential groceries and want to drop it off, that is acceptable - there is a box outside our front door where donated parts can be placed.

Please be sure you are following proper sanitation procedures when you bag parts - if possible, wear gloves and a breathing mask, wipe or spray with disinfectant if available. We want to minimize the chance of cross-contamination. After it reaches MN, we will be further disinfecting them before delivering to its end destination.

We are not in a position to supply you with filament. If we are successful at raising more money for this program, then we might be able to give you a new reel when you drop off 20 face shield sets.

== 3D Print Directions ==

=== Materials ===

'''PETG filament Sources'''

These face shields are best done with PETG filament. A 1kg spool can make about 20 units.

* [http://matterhackers.com Matter Hackers]
** 3mm product id # MF3CF7NH 1kg about $25
** 1.75mm product id # M3MY2VQG 1kg about $24 (only $20 each if you buy 5)
** 1.75mm product id # MTVEPT25 10 pounds (4.5kg) about $185 It is a higher quality PETG filament, but is it really worth the extra cost?

'''PETG Sheet Sources'''

One 48x96 inch sheet can make about 24 shields.

* [http://www.piedmontplastics.com Piedmont Plastics] in San Leandro, CA. .020x48x96 CLR VIVAK PETG JFM about $16/sheet.

=== Instructions ===

'''Printer Settings'''

Print with PETG for ease of sanitation - IPA, Hydrogen Peroxide, Bleach, and Acetic Acid up to 10% can all be safely used with PETG.

Print settings:
* Temperature based on filament selection.
* 3 perimeters
* 100% infill
* 0.3mm Draft settings in PrusaSlicer work fine
* we are running our Prusa's at 130% speed

=== Parts ===
We are focusing production on the Prusa RC2 headband with some modification to reduce weight and center the mounting pins, based on feedback from medical professionals.
If your printer is large enough to print this design, PLEASE switch production to that. If your printer cannot accommodate that, RC1 pieces are still helpful. See below for details on each.

==== RC2 + MakerNexus extensions (PREFERRED) ====

The MakerNexus modifications [https://github.com/hzeller/prusa-covid19-shield-remix are on github].
Easiest is to download the release at https://github.com/hzeller/prusa-covid19-shield-remix/releases (latest is v1.4 from 2020-03-29)

[[File:covid-headband-build-plate.png]]

This archive contains (next to the source files) the following files used used to print, which you also can download here:

* '''Ready-to-go GCode''': [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/fab/thin_shield_0.3mm_PETG_MK3S.gcode thin_shield_0.3mm_PETG_MK3S.gcode] (right click, download or ''save link as...'') for '''PETG''' (preferred), [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/fab/normal_shield_0.3mm_PLA_MK3S.gcode normal_shield_0.3mm_PLA_MK3S.gcode] for '''PLA''' (if that's all you have). This prints two headbands and two bottom stabilizers. Using print-speed of 130% on the Prusa seems to work fine.

* '''slice yourself''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/thin_shield_with_support.stl thin_shield_with_support.stl] (right click, download or ''save link as...'') Recommended for '''PETG''' and [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/normal_shield_with_support.stl normal_shield_with_support.stl] recommended for '''PLA'''

More files, 3mf and STL you get directly on Github: https://github.com/hzeller/prusa-covid19-shield-remix#cut-to-the-chase-gcode-ready-to-use

==== Other Versions ====

Instead of Prusa RC2 or RC3, please use the version above, as it contains changes we got as feedback from
our local healthcare community.

We're working on a stacked version that prints reliably, but if you want/need to print stacked, as an
exception to the above, you can use the Prusa pre-arranged to print 3 at one time.
* [[:media:COVID19 SHIELD R1 3x.stl|Prusa RC1 (x3)]] STL File
For other arrangements, here's the [https://www.prusaprinters.org/prints/25857-protective-face-shield-rc1 original Prusa design page].

== Laser Cut Parts ==

* [[:media:Wrapover-faceshield-laser.svg|The SVG file for laser cutting the shield part]] SVG File

The shields are cut from 0.020 inch thick PETG sheets. Our base design fits into sheets of 24"x32". If we get donations of larger sheets, then we cut it down before using it.

== Elastic Band ==

Each shield uses approximately 8 inches of button hole elastic, 3/4 inch wide.

Sources
* [https://www.homesew.com/ Home Sew]

== Assembly and Disassembly ==

'''Assembly'''

Assembly requires about 8" of 3/4 wide button hole elastic.

* A short video on [https://youtu.be/qKqDUExM4Q8 how to assemble the Maker Nexus face shield version RC2]

* The original design [https://www.prusaprinters.org/prints/25857-prusa-protective-face-shield-rc2 Prusa RC2 STL- On this page]

Each box of face shields contains a QR Code that links to [[Covid-19 Shield User Instructions]]

'''Disassembly for cleaning'''

These face shields can be taken apart for cleaning.

The sheets are made of PETG and can handle alcohol and UV. The head band and spreader could be made of PETG, ABS, or PLA. These all resist alcohol but are heat sensitive. We are not experts in how to sanitize equipment. You, as user, take responsibility for appropriate sanitization. See [https://help.prusa3d.com/en/article/prusa-face-shield-disinfection_125457#_ga=2.91675610.133084680.1585293016-139199844.1585293016 this page from Prusa Research] for information on sanitization methods currently being tested.

A short video on [https://www.youtube.com/watch?v=F7FFPzGeRME how to take the Maker Nexus face shield apart]

== Help at MN ==
At this time we do not need volunteers in the makerspace itself. The space is on lockdown so that we do not introduce the virus into our work area.

'''Donations Needed'''

* PETG filament is useful - if you aren't able to print yourself. Any color in both 1.75mm and 3mm diameter filament. It should be in a factory sealed box or in a bag with desiccant.
* 3/4"-1" button hole elastic
* 0.020" thick PETG film for disposable masks, sheets or rolls

You can drop-off the donations at Maker Nexus, just leave it in the box by the front door of Maker Nexus. Please use appropriate procedures when packaging - including wearing a new pair of gloves and a face mask if available.

You can also donate via PayPal towards COVID-19 efforts that Maker Nexus is working on. [http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Who to contact'''

MN members join the #covid-faceshield channel on [https://www.makernexus.com/member-dashboard Slack]

If you don't have access to Slack, please email [mailto:faceshields@makernexus.org faceshields@makernexus.org]

== External Links ==

=== Information & Discussions ===
- [https://join.slack.com/t/prusafaceshields/shared_invite/zt-cz809azp-f41jGEYZivRKWH6IcYEmKw External slack for Prusa Shield discussions]

== Status ==
As of 3/29/2020

* We have 15 3D printers at Maker Nexus and 205 printers at homes through out the community.

* We have enough 0.020/0.030 PETg sheets to make about 4000 more shields. This is hard to buy now and we are testing alternatives.

* We have enough filament to keep our printers running and are buying more. Our preferred filament is now on back order and we are sourcing directly from China.

* We are exploring injection molding for the head bands. This may take some time.

* We have shipped over 650 face shields. Yea! That is what it's all about.

3D printed face shields

2020-03-30T01:18:45Z

Hzeller: /* RC2 + MakerNexus extensions (PREFERRED) */

[[File:Face shield front.jpg|200px]] [[File:Face shield side.jpg|350px]] [[File:Face shield top.jpg|350px]]

== Overview ==
Face shields are used by health care professionals to protect them when working with patients. Hospital supplies are running low. While they prefer to use commercially manufactured ones, in this emergency they are looking for alternative sources.

The headband portion of these shields is made on a 3D printer. If you have a 3D printer, you can make these. We have several at Maker Nexus that will be running as long as we have supplies. We deliver them to local hospitals.

* [https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform Sign up to use your own 3D printer] to help
* [https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform Sign up to receive face shields] for your health care facility

'''In the News'''

* A TV segment [https://sanfrancisco.cbslocal.com/video/4495791-maker-community-uses-3-d-printer-to-supply-ppe-to-health-professionals/ from KPIX]
* Watch a short [https://www.ktvu.com/news/covid-19-sunnyvale-company-designing-3d-protective-masks-to-meet-demand KTVU news report about our efforts.]

'''How much do they cost?'''

We give these away, paying for them from donations. We do not sell them. Promises of donations or actual donations do not affect who is prioritized to receive the PPE. The allocation team is not told who has donated. However, they cost us about $5 each to make. Donations are critical for us to be able to keep producing. We will make them until the money runs out.

[http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Is there really a need?'''

* We've heard from friends that "nurses are cutting up plastic soda bottles to make face shields, using saran wrap on top of N95 masks to allow for multi-use."
* One local nurse said they are making face shields from cut up shower curtains and hot glue guns.
* In reviewing the current design: "The nurses were over the moon about how easily the shields can be disassembled and sterilized."
* A nurse from Marin called us and I got her hooked into the allocation process and told her they were free. She started crying on the phone. - JimS

We are ramping up to make 1,000 a week, maybe more.

'''How do I get some?'''

If your health care facility needs face shields, fill in this form:

[https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform?usp=sf_link My Facility Needs Face Shields] (click the link)

A link to [[MN COVID Response|Other COVID Projects]]

== 3D Print Parts At Home ==

=== Use Your 3D Printer for good ===

'''Sign up'''

We are establishing a network of 3D printer owners who can make the headbands for us. You make them and deliver them to our facility where we do the assembly and get them to the hospitals. If you want to be part of our network, fill in this form and we will contact you:

[https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform I want to help make them]

'''Report your progress'''

If you've signed-up and started printing already:
[https://docs.google.com/spreadsheets/d/1Aoq7a0YbkPbGiMZGSxBgo0ySlgDWZHoaCvXc8sx9FU8/edit Keep us updated with your print progress].
Please request permission to access the file if you're prompted to, and we'll respond as quickly as we can.

=== What to do with the finished product ===
When you have parts ready to deliver, please follow the following steps:
# Fill out [https://docs.google.com/forms/d/e/1FAIpQLSdJfZz5M-xxQifJmFBdNQcn7c3i5eFabV7StA5ep9zsJuco9Q/viewform?usp=sf_link this form] with information about your donation (so we can track inventory)
# Seal in plastic bag.
# Label bag with your email, the version of face shield you printed (e.g. "MN 1.3" see releases in parts below; or "RC2" if you used that), the material printed with and the date you closed the bag.
# Mail to
Maker Nexus
234 E. Carribean Drive
Sunnyvale, CA 94089
OR
Deliver to us if you are local and it does not violate the Shelter In Place Order - please do not make a special trip for this - but if you are passing by on your way to get essential groceries and want to drop it off, that is acceptable - there is a box outside our front door where donated parts can be placed.

Please be sure you are following proper sanitation procedures when you bag parts - if possible, wear gloves and a breathing mask, wipe or spray with disinfectant if available. We want to minimize the chance of cross-contamination. After it reaches MN, we will be further disinfecting them before delivering to its end destination.

We are not in a position to supply you with filament. If we are successful at raising more money for this program, then we might be able to give you a new reel when you drop off 20 face shield sets.

== 3D Print Directions ==

=== Materials ===

'''PETG filament Sources'''

These face shields are best done with PETG filament. A 1kg spool can make about 20 units.

* [http://matterhackers.com Matter Hackers]
** 3mm product id # MF3CF7NH 1kg about $25
** 1.75mm product id # M3MY2VQG 1kg about $24 (only $20 each if you buy 5)
** 1.75mm product id # MTVEPT25 10 pounds (4.5kg) about $185 It is a higher quality PETG filament, but is it really worth the extra cost?

'''PETG Sheet Sources'''

One 48x96 inch sheet can make about 24 shields.

* [http://www.piedmontplastics.com Piedmont Plastics] in San Leandro, CA. .020x48x96 CLR VIVAK PETG JFM about $16/sheet.

=== Instructions ===

'''Printer Settings'''

Print with PETG for ease of sanitation - IPA, Hydrogen Peroxide, Bleach, and Acetic Acid up to 10% can all be safely used with PETG.

Print settings:
* Temperature based on filament selection.
* 3 perimeters
* 100% infill
* 0.3mm Draft settings in PrusaSlicer work fine
* we are running our Prusa's at 130% speed

=== Parts ===
We are focusing production on the Prusa RC2 headband with some modification to reduce weight and center the mounting pins, based on feedback from medical professionals.
If your printer is large enough to print this design, PLEASE switch production to that. If your printer cannot accommodate that, RC1 pieces are still helpful. See below for details on each.

==== RC2 + MakerNexus extensions (PREFERRED) ====

The MakerNexus modifications [https://github.com/hzeller/prusa-covid19-shield-remix are on github].
Easiest is to download the release at https://github.com/hzeller/prusa-covid19-shield-remix/releases (latest is v1.4 from 2020-03-29)

[[File:covid-headband-build-plate.png]]

This archive contains (next to the source files) the following files used used to print, which you also can download here:

* '''Ready-to-go GCode''': [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/fab/thin_shield_0.3mm_PETG_MK3S.gcode thin_shield_0.3mm_PETG_MK3S.gcode] (right click, download or ''save link as...'') for '''PETG''' (preferred), [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/fab/normal_shield_0.3mm_PLA_MK3S.gcode normal_shield_0.3mm_PLA_MK3S.gcode] for '''PLA''' (if that's all you have). This prints two headbands and two the bottom stabilizers. Using print-speed of 130% on the Prusa seems to work fine.

* '''slice yourself''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/thin_shield_with_support.stl thin_shield_with_support.stl] (right click, download or ''save link as...'') Recommended for '''PETG''' and [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/normal_shield_with_support.stl normal_shield_with_support.stl] recommended for '''PLA'''

More files, 3mf and STL you get directly on Github: https://github.com/hzeller/prusa-covid19-shield-remix#cut-to-the-chase-gcode-ready-to-use

==== Other Versions ====

Instead of Prusa RC2 or RC3, please use the version above, as it contains changes we got as feedback from
our local healthcare community.

We're working on a stacked version that prints reliably, but if you want/need to print stacked, as an
exception to the above, you can use the Prusa pre-arranged to print 3 at one time.
* [[:media:COVID19 SHIELD R1 3x.stl|Prusa RC1 (x3)]] STL File
For other arrangements, here's the [https://www.prusaprinters.org/prints/25857-protective-face-shield-rc1 original Prusa design page].

== Laser Cut Parts ==

* [[:media:Wrapover-faceshield-laser.svg|The SVG file for laser cutting the shield part]] SVG File

The shields are cut from 0.020 inch thick PETG sheets. Our base design fits into sheets of 24"x32". If we get donations of larger sheets, then we cut it down before using it.

== Elastic Band ==

Each shield uses approximately 8 inches of button hole elastic, 3/4 inch wide.

Sources
* [https://www.homesew.com/ Home Sew]

== Assembly and Disassembly ==

'''Assembly'''

Assembly requires about 8" of 3/4 wide button hole elastic.

* A short video on [https://youtu.be/qKqDUExM4Q8 how to assemble the Maker Nexus face shield version RC2]

* The original design [https://www.prusaprinters.org/prints/25857-prusa-protective-face-shield-rc2 Prusa RC2 STL- On this page]

Each box of face shields contains a QR Code that links to [[Covid-19 Shield User Instructions]]

'''Disassembly for cleaning'''

These face shields can be taken apart for cleaning.

The sheets are made of PETG and can handle alcohol and UV. The head band and spreader could be made of PETG, ABS, or PLA. These all resist alcohol but are heat sensitive. We are not experts in how to sanitize equipment. You, as user, take responsibility for appropriate sanitization. See [https://help.prusa3d.com/en/article/prusa-face-shield-disinfection_125457#_ga=2.91675610.133084680.1585293016-139199844.1585293016 this page from Prusa Research] for information on sanitization methods currently being tested.

A short video on [https://www.youtube.com/watch?v=F7FFPzGeRME how to take the Maker Nexus face shield apart]

== Help at MN ==
At this time we do not need volunteers in the makerspace itself. The space is on lockdown so that we do not introduce the virus into our work area.

'''Donations Needed'''

* PETG filament is useful - if you aren't able to print yourself. Any color in both 1.75mm and 3mm diameter filament. It should be in a factory sealed box or in a bag with desiccant.
* 3/4"-1" button hole elastic
* 0.020" thick PETG film for disposable masks, sheets or rolls

You can drop-off the donations at Maker Nexus, just leave it in the box by the front door of Maker Nexus. Please use appropriate procedures when packaging - including wearing a new pair of gloves and a face mask if available.

You can also donate via PayPal towards COVID-19 efforts that Maker Nexus is working on. [http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Who to contact'''

MN members join the #covid-faceshield channel on [https://www.makernexus.com/member-dashboard Slack]

If you don't have access to Slack, please email [mailto:faceshields@makernexus.org faceshields@makernexus.org]

== External Links ==

=== Information & Discussions ===
- [https://join.slack.com/t/prusafaceshields/shared_invite/zt-cz809azp-f41jGEYZivRKWH6IcYEmKw External slack for Prusa Shield discussions]

== Status ==
As of 3/29/2020

* We have 15 3D printers at Maker Nexus and 205 printers at homes through out the community.

* We have enough 0.020/0.030 PETg sheets to make about 4000 more shields. This is hard to buy now and we are testing alternatives.

* We have enough filament to keep our printers running and are buying more. Our preferred filament is now on back order and we are sourcing directly from China.

* We are exploring injection molding for the head bands. This may take some time.

* We have shipped over 650 face shields. Yea! That is what it's all about.

File:Covid-headband-build-plate.png

2020-03-30T01:08:48Z

Hzeller: Hzeller uploaded a new version of File:Covid-headband-build-plate.png

Overview rendering of the build-plate for the face shield headband.

3D printed face shields

2020-03-30T00:59:25Z

Hzeller: /* RC2 + MakerNexus extensions (PREFERRED) */

[[File:Face shield front.jpg|200px]] [[File:Face shield side.jpg|350px]] [[File:Face shield top.jpg|350px]]

== Overview ==
Face shields are used by health care professionals to protect them when working with patients. Hospital supplies are running low. While they prefer to use commercially manufactured ones, in this emergency they are looking for alternative sources.

The headband portion of these shields is made on a 3D printer. If you have a 3D printer, you can make these. We have several at Maker Nexus that will be running as long as we have supplies. We deliver them to local hospitals.

* [https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform Sign up to use your own 3D printer] to help
* [https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform Sign up to receive face shields] for your health care facility

'''In the News'''

* A TV segment [https://sanfrancisco.cbslocal.com/video/4495791-maker-community-uses-3-d-printer-to-supply-ppe-to-health-professionals/ from KPIX]
* Watch a short [https://www.ktvu.com/news/covid-19-sunnyvale-company-designing-3d-protective-masks-to-meet-demand KTVU news report about our efforts.]

'''How much do they cost?'''

We give these away, paying for them from donations. We do not sell them. Promises of donations or actual donations do not affect who is prioritized to receive the PPE. The allocation team is not told who has donated. However, they cost us about $5 each to make. Donations are critical for us to be able to keep producing. We will make them until the money runs out.

[http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Is there really a need?'''

* We've heard from friends that "nurses are cutting up plastic soda bottles to make face shields, using saran wrap on top of N95 masks to allow for multi-use."
* One local nurse said they are making face shields from cut up shower curtains and hot glue guns.
* In reviewing the current design: "The nurses were over the moon about how easily the shields can be disassembled and sterilized."
* A nurse from Marin called us and I got her hooked into the allocation process and told her they were free. She started crying on the phone. - JimS

We are ramping up to make 1,000 a week, maybe more.

'''How do I get some?'''

If your health care facility needs face shields, fill in this form:

[https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform?usp=sf_link My Facility Needs Face Shields] (click the link)

A link to [[MN COVID Response|Other COVID Projects]]

== 3D Print Parts At Home ==

=== Use Your 3D Printer for good ===

'''Sign up'''

We are establishing a network of 3D printer owners who can make the headbands for us. You make them and deliver them to our facility where we do the assembly and get them to the hospitals. If you want to be part of our network, fill in this form and we will contact you:

[https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform I want to help make them]

'''Report your progress'''

If you've signed-up and started printing already:
[https://docs.google.com/spreadsheets/d/1Aoq7a0YbkPbGiMZGSxBgo0ySlgDWZHoaCvXc8sx9FU8/edit Keep us updated with your print progress].
Please request permission to access the file if you're prompted to, and we'll respond as quickly as we can.

=== What to do with the finished product ===
When you have parts ready to deliver, please follow the following steps:
# Fill out [https://docs.google.com/forms/d/e/1FAIpQLSdJfZz5M-xxQifJmFBdNQcn7c3i5eFabV7StA5ep9zsJuco9Q/viewform?usp=sf_link this form] with information about your donation (so we can track inventory)
# Seal in plastic bag.
# Label bag with your email, the version of face shield you printed (e.g. "MN 1.3" see releases in parts below; or "RC2" if you used that), the material printed with and the date you closed the bag.
# Mail to
Maker Nexus
234 E. Carribean Drive
Sunnyvale, CA 94089
OR
Deliver to us if you are local and it does not violate the Shelter In Place Order - please do not make a special trip for this - but if you are passing by on your way to get essential groceries and want to drop it off, that is acceptable - there is a box outside our front door where donated parts can be placed.

Please be sure you are following proper sanitation procedures when you bag parts - if possible, wear gloves and a breathing mask, wipe or spray with disinfectant if available. We want to minimize the chance of cross-contamination. After it reaches MN, we will be further disinfecting them before delivering to its end destination.

We are not in a position to supply you with filament. If we are successful at raising more money for this program, then we might be able to give you a new reel when you drop off 20 face shield sets.

== 3D Print Directions ==

=== Materials ===

'''PETG filament Sources'''

These face shields are best done with PETG filament. A 1kg spool can make about 20 units.

* [http://matterhackers.com Matter Hackers]
** 3mm product id # MF3CF7NH 1kg about $25
** 1.75mm product id # M3MY2VQG 1kg about $24 (only $20 each if you buy 5)
** 1.75mm product id # MTVEPT25 10 pounds (4.5kg) about $185 It is a higher quality PETG filament, but is it really worth the extra cost?

'''PETG Sheet Sources'''

One 48x96 inch sheet can make about 24 shields.

* [http://www.piedmontplastics.com Piedmont Plastics] in San Leandro, CA. .020x48x96 CLR VIVAK PETG JFM about $16/sheet.

=== Instructions ===

'''Printer Settings'''

Print with PETG for ease of sanitation - IPA, Hydrogen Peroxide, Bleach, and Acetic Acid up to 10% can all be safely used with PETG.

Print settings:
* Temperature based on filament selection.
* 3 perimeters
* 100% infill
* 0.3mm Draft settings in PrusaSlicer work fine
* we are running our Prusa's at 130% speed

=== Parts ===
We are focusing production on the Prusa RC2 headband with some modification to reduce weight and center the mounting pins, based on feedback from medical professionals.
If your printer is large enough to print this design, PLEASE switch production to that. If your printer cannot accommodate that, RC1 pieces are still helpful. See below for details on each.

==== RC2 + MakerNexus extensions (PREFERRED) ====

The MakerNexus modifications [https://github.com/hzeller/prusa-covid19-shield-remix are on github].
Easiest is to download the release at https://github.com/hzeller/prusa-covid19-shield-remix/releases (latest is v1.4 from 2020-03-29)

[[File:covid-headband-build-plate.png]]

This archive contains (next to the source files) the following files used used to print, which you also can download here:

* '''Ready-to-go GCode''': [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/fab/thin_shield_0.3mm_PETG_MK3S.gcode thin_shield_0.3mm_PETG_MK3S.gcode] (right click, download or ''save link as...'') for '''PETG''', [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/fab/normal_shield_0.3mm_PLA_MK3S.gcode normal_shield_0.3mm_PLA_MK3S.gcode] for '''PLA'''. This prints two headbands and two the bottom stabilizers. Using print-speed of 130% on the Prusa seems to work fine.

* '''slice yourself''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/thin_shield_with_support.stl thin_shield_with_support.stl] (right click, download or ''save link as...'') Recommended for '''PETG''' and [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/normal_shield_with_support.stl normal_shield_with_support.stl] recommended for '''PLA'''

More files, 3mf and STL you get directly on Github: https://github.com/hzeller/prusa-covid19-shield-remix#cut-to-the-chase-gcode-ready-to-use

==== Other Versions ====

Instead of Prusa RC2 or RC3, please use the version above, as it contains changes we got as feedback from
our local healthcare community.

We're working on a stacked version that prints reliably, but if you want/need to print stacked, as an
exception to the above, you can use the Prusa pre-arranged to print 3 at one time.
* [[:media:COVID19 SHIELD R1 3x.stl|Prusa RC1 (x3)]] STL File
For other arrangements, here's the [https://www.prusaprinters.org/prints/25857-protective-face-shield-rc1 original Prusa design page].

== Laser Cut Parts ==

* [[:media:Wrapover-faceshield-laser.svg|The SVG file for laser cutting the shield part]] SVG File

The shields are cut from 0.020 inch thick PETG sheets. Our base design fits into sheets of 24"x32". If we get donations of larger sheets, then we cut it down before using it.

== Elastic Band ==

Each shield uses approximately 8 inches of button hole elastic, 3/4 inch wide.

Sources
* [https://www.homesew.com/ Home Sew]

== Assembly and Disassembly ==

'''Assembly'''

Assembly requires about 8" of 3/4 wide button hole elastic.

* A short video on [https://youtu.be/qKqDUExM4Q8 how to assemble the Maker Nexus face shield version RC2]

* The original design [https://www.prusaprinters.org/prints/25857-prusa-protective-face-shield-rc2 Prusa RC2 STL- On this page]

Each box of face shields contains a QR Code that links to [[Covid-19 Shield User Instructions]]

'''Disassembly for cleaning'''

These face shields can be taken apart for cleaning.

The sheets are made of PETG and can handle alcohol and UV. The head band and spreader could be made of PETG, ABS, or PLA. These all resist alcohol but are heat sensitive. We are not experts in how to sanitize equipment. You, as user, take responsibility for appropriate sanitization. See [https://help.prusa3d.com/en/article/prusa-face-shield-disinfection_125457#_ga=2.91675610.133084680.1585293016-139199844.1585293016 this page from Prusa Research] for information on sanitization methods currently being tested.

A short video on [https://www.youtube.com/watch?v=F7FFPzGeRME how to take the Maker Nexus face shield apart]

== Help at MN ==
At this time we do not need volunteers in the makerspace itself. The space is on lockdown so that we do not introduce the virus into our work area.

'''Donations Needed'''

* PETG filament is useful - if you aren't able to print yourself. Any color in both 1.75mm and 3mm diameter filament. It should be in a factory sealed box or in a bag with desiccant.
* 3/4"-1" button hole elastic
* 0.020" thick PETG film for disposable masks, sheets or rolls

You can drop-off the donations at Maker Nexus, just leave it in the box by the front door of Maker Nexus. Please use appropriate procedures when packaging - including wearing a new pair of gloves and a face mask if available.

You can also donate via PayPal towards COVID-19 efforts that Maker Nexus is working on. [http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Who to contact'''

MN members join the #covid-faceshield channel on [https://www.makernexus.com/member-dashboard Slack]

If you don't have access to Slack, please email [mailto:faceshields@makernexus.org faceshields@makernexus.org]

== External Links ==

=== Information & Discussions ===
- [https://join.slack.com/t/prusafaceshields/shared_invite/zt-cz809azp-f41jGEYZivRKWH6IcYEmKw External slack for Prusa Shield discussions]

== Status ==
As of 3/29/2020

* We have 15 3D printers at Maker Nexus and 205 printers at homes through out the community.

* We have enough 0.020/0.030 PETg sheets to make about 4000 more shields. This is hard to buy now and we are testing alternatives.

* We have enough filament to keep our printers running and are buying more. Our preferred filament is now on back order and we are sourcing directly from China.

* We are exploring injection molding for the head bands. This may take some time.

* We have shipped over 650 face shields. Yea! That is what it's all about.

3D printed face shields

2020-03-30T00:57:59Z

Hzeller: Update to 1.4

[[File:Face shield front.jpg|200px]] [[File:Face shield side.jpg|350px]] [[File:Face shield top.jpg|350px]]

== Overview ==
Face shields are used by health care professionals to protect them when working with patients. Hospital supplies are running low. While they prefer to use commercially manufactured ones, in this emergency they are looking for alternative sources.

The headband portion of these shields is made on a 3D printer. If you have a 3D printer, you can make these. We have several at Maker Nexus that will be running as long as we have supplies. We deliver them to local hospitals.

* [https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform Sign up to use your own 3D printer] to help
* [https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform Sign up to receive face shields] for your health care facility

'''In the News'''

* A TV segment [https://sanfrancisco.cbslocal.com/video/4495791-maker-community-uses-3-d-printer-to-supply-ppe-to-health-professionals/ from KPIX]
* Watch a short [https://www.ktvu.com/news/covid-19-sunnyvale-company-designing-3d-protective-masks-to-meet-demand KTVU news report about our efforts.]

'''How much do they cost?'''

We give these away, paying for them from donations. We do not sell them. Promises of donations or actual donations do not affect who is prioritized to receive the PPE. The allocation team is not told who has donated. However, they cost us about $5 each to make. Donations are critical for us to be able to keep producing. We will make them until the money runs out.

[http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Is there really a need?'''

* We've heard from friends that "nurses are cutting up plastic soda bottles to make face shields, using saran wrap on top of N95 masks to allow for multi-use."
* One local nurse said they are making face shields from cut up shower curtains and hot glue guns.
* In reviewing the current design: "The nurses were over the moon about how easily the shields can be disassembled and sterilized."
* A nurse from Marin called us and I got her hooked into the allocation process and told her they were free. She started crying on the phone. - JimS

We are ramping up to make 1,000 a week, maybe more.

'''How do I get some?'''

If your health care facility needs face shields, fill in this form:

[https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform?usp=sf_link My Facility Needs Face Shields] (click the link)

A link to [[MN COVID Response|Other COVID Projects]]

== 3D Print Parts At Home ==

=== Use Your 3D Printer for good ===

'''Sign up'''

We are establishing a network of 3D printer owners who can make the headbands for us. You make them and deliver them to our facility where we do the assembly and get them to the hospitals. If you want to be part of our network, fill in this form and we will contact you:

[https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform I want to help make them]

'''Report your progress'''

If you've signed-up and started printing already:
[https://docs.google.com/spreadsheets/d/1Aoq7a0YbkPbGiMZGSxBgo0ySlgDWZHoaCvXc8sx9FU8/edit Keep us updated with your print progress].
Please request permission to access the file if you're prompted to, and we'll respond as quickly as we can.

=== What to do with the finished product ===
When you have parts ready to deliver, please follow the following steps:
# Fill out [https://docs.google.com/forms/d/e/1FAIpQLSdJfZz5M-xxQifJmFBdNQcn7c3i5eFabV7StA5ep9zsJuco9Q/viewform?usp=sf_link this form] with information about your donation (so we can track inventory)
# Seal in plastic bag.
# Label bag with your email, the version of face shield you printed (e.g. "MN 1.3" see releases in parts below; or "RC2" if you used that), the material printed with and the date you closed the bag.
# Mail to
Maker Nexus
234 E. Carribean Drive
Sunnyvale, CA 94089
OR
Deliver to us if you are local and it does not violate the Shelter In Place Order - please do not make a special trip for this - but if you are passing by on your way to get essential groceries and want to drop it off, that is acceptable - there is a box outside our front door where donated parts can be placed.

Please be sure you are following proper sanitation procedures when you bag parts - if possible, wear gloves and a breathing mask, wipe or spray with disinfectant if available. We want to minimize the chance of cross-contamination. After it reaches MN, we will be further disinfecting them before delivering to its end destination.

We are not in a position to supply you with filament. If we are successful at raising more money for this program, then we might be able to give you a new reel when you drop off 20 face shield sets.

== 3D Print Directions ==

=== Materials ===

'''PETG filament Sources'''

These face shields are best done with PETG filament. A 1kg spool can make about 20 units.

* [http://matterhackers.com Matter Hackers]
** 3mm product id # MF3CF7NH 1kg about $25
** 1.75mm product id # M3MY2VQG 1kg about $24 (only $20 each if you buy 5)
** 1.75mm product id # MTVEPT25 10 pounds (4.5kg) about $185 It is a higher quality PETG filament, but is it really worth the extra cost?

'''PETG Sheet Sources'''

One 48x96 inch sheet can make about 24 shields.

* [http://www.piedmontplastics.com Piedmont Plastics] in San Leandro, CA. .020x48x96 CLR VIVAK PETG JFM about $16/sheet.

=== Instructions ===

'''Printer Settings'''

Print with PETG for ease of sanitation - IPA, Hydrogen Peroxide, Bleach, and Acetic Acid up to 10% can all be safely used with PETG.

Print settings:
* Temperature based on filament selection.
* 3 perimeters
* 100% infill
* 0.3mm Draft settings in PrusaSlicer work fine
* we are running our Prusa's at 130% speed

=== Parts ===
We are focusing production on the Prusa RC2 headband with some modification to reduce weight and center the mounting pins, based on feedback from medical professionals.
If your printer is large enough to print this design, PLEASE switch production to that. If your printer cannot accommodate that, RC1 pieces are still helpful. See below for details on each.

==== RC2 + MakerNexus extensions (PREFERRED) ====

The MakerNexus modifications [https://github.com/hzeller/prusa-covid19-shield-remix are on github].
Easiest is to download the release at https://github.com/hzeller/prusa-covid19-shield-remix/releases (latest is v1.4 from 2020-03-29)

[[File:covid-headband-build-plate.png]]

This archive contains (next to the source files) the following files used used to print, which you also can download here:

* '''Ready-to-go GCode''': [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/fab/thin_shield_0.3mm_PETG_MK3S.gcode thin_shield_0.3mm_PETG_MK3S.gcode] (right click, download or ''save link as...'') for MK3S printer for PETG; printing two headbands. [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/fab/normal_shield_0.3mm_PLA_MK3S.gcode normal_shield_0.3mm_PLA_MK3S.gcode] Using print-speed of 130% on the Prusa seems to work fine.

* '''slice yourself''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/thin_shield_with_support.stl thin_shield_with_support.stl] (right click, download or ''save link as...'') Recommended for '''PETG''' and [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.4/normal_shield_with_support.stl normal_shield_with_support.stl] recommended for '''PLA'''

More files, 3mf and STL you get directly on Github: https://github.com/hzeller/prusa-covid19-shield-remix#cut-to-the-chase-gcode-ready-to-use

==== Other Versions ====

Instead of Prusa RC2 or RC3, please use the version above, as it contains changes we got as feedback from
our local healthcare community.

We're working on a stacked version that prints reliably, but if you want/need to print stacked, as an
exception to the above, you can use the Prusa pre-arranged to print 3 at one time.
* [[:media:COVID19 SHIELD R1 3x.stl|Prusa RC1 (x3)]] STL File
For other arrangements, here's the [https://www.prusaprinters.org/prints/25857-protective-face-shield-rc1 original Prusa design page].

== Laser Cut Parts ==

* [[:media:Wrapover-faceshield-laser.svg|The SVG file for laser cutting the shield part]] SVG File

The shields are cut from 0.020 inch thick PETG sheets. Our base design fits into sheets of 24"x32". If we get donations of larger sheets, then we cut it down before using it.

== Elastic Band ==

Each shield uses approximately 8 inches of button hole elastic, 3/4 inch wide.

Sources
* [https://www.homesew.com/ Home Sew]

== Assembly and Disassembly ==

'''Assembly'''

Assembly requires about 8" of 3/4 wide button hole elastic.

* A short video on [https://youtu.be/qKqDUExM4Q8 how to assemble the Maker Nexus face shield version RC2]

* The original design [https://www.prusaprinters.org/prints/25857-prusa-protective-face-shield-rc2 Prusa RC2 STL- On this page]

Each box of face shields contains a QR Code that links to [[Covid-19 Shield User Instructions]]

'''Disassembly for cleaning'''

These face shields can be taken apart for cleaning.

The sheets are made of PETG and can handle alcohol and UV. The head band and spreader could be made of PETG, ABS, or PLA. These all resist alcohol but are heat sensitive. We are not experts in how to sanitize equipment. You, as user, take responsibility for appropriate sanitization. See [https://help.prusa3d.com/en/article/prusa-face-shield-disinfection_125457#_ga=2.91675610.133084680.1585293016-139199844.1585293016 this page from Prusa Research] for information on sanitization methods currently being tested.

A short video on [https://www.youtube.com/watch?v=F7FFPzGeRME how to take the Maker Nexus face shield apart]

== Help at MN ==
At this time we do not need volunteers in the makerspace itself. The space is on lockdown so that we do not introduce the virus into our work area.

'''Donations Needed'''

* PETG filament is useful - if you aren't able to print yourself. Any color in both 1.75mm and 3mm diameter filament. It should be in a factory sealed box or in a bag with desiccant.
* 3/4"-1" button hole elastic
* 0.020" thick PETG film for disposable masks, sheets or rolls

You can drop-off the donations at Maker Nexus, just leave it in the box by the front door of Maker Nexus. Please use appropriate procedures when packaging - including wearing a new pair of gloves and a face mask if available.

You can also donate via PayPal towards COVID-19 efforts that Maker Nexus is working on. [http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Who to contact'''

MN members join the #covid-faceshield channel on [https://www.makernexus.com/member-dashboard Slack]

If you don't have access to Slack, please email [mailto:faceshields@makernexus.org faceshields@makernexus.org]

== External Links ==

=== Information & Discussions ===
- [https://join.slack.com/t/prusafaceshields/shared_invite/zt-cz809azp-f41jGEYZivRKWH6IcYEmKw External slack for Prusa Shield discussions]

== Status ==
As of 3/29/2020

* We have 15 3D printers at Maker Nexus and 205 printers at homes through out the community.

* We have enough 0.020/0.030 PETg sheets to make about 4000 more shields. This is hard to buy now and we are testing alternatives.

* We have enough filament to keep our printers running and are buying more. Our preferred filament is now on back order and we are sourcing directly from China.

* We are exploring injection molding for the head bands. This may take some time.

* We have shipped over 650 face shields. Yea! That is what it's all about.

3D printed face shields

2020-03-29T22:38:01Z

Hzeller: /* RC2 + MakerNexus extensions (PREFERRED) */

[[File:Face shield front.jpg|200px]] [[File:Face shield side.jpg|350px]] [[File:Face shield top.jpg|350px]]

== Overview ==
Face shields are used by health care professionals to protect them when working with patients. Hospital supplies are running low. While they prefer to use commercially manufactured ones, in this emergency they are looking for alternative sources.

The headband portion of these shields is made on a 3D printer. If you have a 3D printer, you can make these. We have several at Maker Nexus that will be running as long as we have supplies. We deliver them to local hospitals.

* [https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform Sign up to use your own 3D printer] to help
* [https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform Sign up to receive face shields] for your health care facility

'''In the News'''

* A TV segment [https://sanfrancisco.cbslocal.com/video/4495791-maker-community-uses-3-d-printer-to-supply-ppe-to-health-professionals/ from KPIX]
* Watch a short [https://www.ktvu.com/news/covid-19-sunnyvale-company-designing-3d-protective-masks-to-meet-demand KTVU news report about our efforts.]

'''How much do they cost?'''

We give these away, paying for them from donations. We do not sell them. Promises of donations or actual donations do not affect who is prioritized to receive the PPE. The allocation team is not told who has donated. However, they cost us about $5 each to make. Donations are critical for us to be able to keep producing. We will make them until the money runs out.

[http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Is there really a need?'''

* We've heard from friends that "nurses are cutting up plastic soda bottles to make face shields, using saran wrap on top of N95 masks to allow for multi-use."
* One local nurse said they are making face shields from cut up shower curtains and hot glue guns.
* In reviewing the current design: "The nurses were over the moon about how easily the shields can be disassembled and sterilized."
* A nurse from Marin called us and I got her hooked into the allocation process and told her they were free. She started crying on the phone. - JimS

We are ramping up to make 1,000 a week, maybe more.

'''How do I get some?'''

If your health care facility needs face shields, fill in this form:

[https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform?usp=sf_link My Facility Needs Face Shields] (click the link)

A link to [[MN COVID Response|Other COVID Projects]]

== 3D Print Parts At Home ==

=== Use Your 3D Printer for good ===

'''Sign up'''

We are establishing a network of 3D printer owners who can make the headbands for us. You make them and deliver them to our facility where we do the assembly and get them to the hospitals. If you want to be part of our network, fill in this form and we will contact you:

[https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform I want to help make them]

'''Report your progress'''

If you've signed-up and started printing already:
[https://docs.google.com/spreadsheets/d/1Aoq7a0YbkPbGiMZGSxBgo0ySlgDWZHoaCvXc8sx9FU8/edit Keep us updated with your print progress].
Please request permission to access the file if you're prompted to, and we'll respond as quickly as we can.

=== What to do with the finished product ===
When you have parts ready to deliver, please follow the following steps:
# Fill out [https://docs.google.com/forms/d/e/1FAIpQLSdJfZz5M-xxQifJmFBdNQcn7c3i5eFabV7StA5ep9zsJuco9Q/viewform?usp=sf_link this form] with information about your donation (so we can track inventory)
# Seal in plastic bag.
# Label bag with your email, the version of face shield you printed (e.g. "MN 1.3" see releases in parts below; or "RC2" if you used that), the material printed with and the date you closed the bag.
# Mail to
Maker Nexus
234 E. Carribean Drive
Sunnyvale, CA 94089
OR
Deliver to us if you are local and it does not violate the Shelter In Place Order - please do not make a special trip for this - but if you are passing by on your way to get essential groceries and want to drop it off, that is acceptable - there is a box outside our front door where donated parts can be placed.

Please be sure you are following proper sanitation procedures when you bag parts - if possible, wear gloves and a breathing mask, wipe or spray with disinfectant if available. We want to minimize the chance of cross-contamination. After it reaches MN, we will be further disinfecting them before delivering to its end destination.

We are not in a position to supply you with filament. If we are successful at raising more money for this program, then we might be able to give you a new reel when you drop off 20 face shield sets.

== 3D Print Directions ==

=== Materials ===

'''PETG filament Sources'''

These face shields are best done with PETG filament. A 1kg spool can make about 20 units.

* [http://matterhackers.com Matter Hackers]
** 3mm product id # MF3CF7NH 1kg about $25
** 1.75mm product id # M3MY2VQG 1kg about $24 (only $20 each if you buy 5)
** 1.75mm product id # MTVEPT25 10 pounds (4.5kg) about $185 It is a higher quality PETG filament, but is it really worth the extra cost?

'''PETG Sheet Sources'''

One 48x96 inch sheet can make about 24 shields.

* [http://www.piedmontplastics.com Piedmont Plastics] in San Leandro, CA. .020x48x96 CLR VIVAK PETG JFM about $16/sheet.

=== Instructions ===

'''Printer Settings'''

Print with PETG for ease of sanitation - IPA, Hydrogen Peroxide, Bleach, and Acetic Acid up to 10% can all be safely used with PETG.

Print settings:
* Temperature based on filament selection.
* 3 perimeters
* 100% infill
* 0.3mm Draft settings in PrusaSlicer work fine
* we are running our Prusa's at 130% speed

=== Parts ===
We are focusing production on the Prusa RC2 headband with some modification to reduce weight and center the mounting pins, based on feedback from medical professionals.
If your printer is large enough to print this design, PLEASE switch production to that. If your printer cannot accommodate that, RC1 pieces are still helpful. See below for details on each.

==== RC2 + MakerNexus extensions (PREFERRED) ====

The MakerNexus modifications [https://github.com/hzeller/prusa-covid19-shield-remix are on github].
Easiest is to download the release at https://github.com/hzeller/prusa-covid19-shield-remix/releases (latest is v1.3 from 2020-03-28 noon)

[[File:covid-headband-build-plate.png]]

This archive contains (next to the source files) the following files used used to print, which you also can download here:

* '''Ready-to-go''': [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.3/normal_shield_0.3mm_PETG_MK3S.gcode normal_shield_0.3mm_PETG_MK3S.gcode] (right click, download or ''save link as...'') '''GCode''' for MK3S printer for PETG 0.3mm, 3 shells, 100% infill; printing two headbands. This places two headbands and two bottom supports on the bed. You can use this directly in your Prusa MK3/MK3S printer. Using print-speed of 130% on the Prusa seems to work fine.
* '''modify print parameters''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.3/normal_shield.3mf normal_shield.3mf] '''3MF''' file to load in slicer. Places two headbands with bottom braces on the bed, lets arrange yourself and change printing parameters. Contains support-material setup.
* '''slice yourself''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.3/normal_shield_with_support.stl normal_shield_with_support.stl] (right click, download or ''save link as...'') The '''STL''' file. It already contains integrated supports for the pins, no support needs to be enabled in your slicer. If the built-in supports look like they are 'hovering', enable 'thin wall detection' in your slicer. The file named normal_shield_no_support.stl does not have supports if you want to use your slicer to do support.

==== Other Versions ====

Instead of Prusa RC2 or RC3, please use the version above, as it contains changes we got as feedback from
our local healthcare community.

We're working on a stacked version that prints reliably, but if you want/need to print stacked, as an
exception to the above, you can use the Prusa pre-arranged to print 3 at one time.
* [[:media:COVID19 SHIELD R1 3x.stl|Prusa RC1 (x3)]] STL File
For other arrangements, here's the [https://www.prusaprinters.org/prints/25857-protective-face-shield-rc1 original Prusa design page].

== Laser Cut Parts ==

* [[:media:Wrapover-faceshield-laser.svg|The SVG file for laser cutting the shield part]] SVG File

The shields are cut from 0.020 inch thick PETG sheets. Our base design fits into sheets of 24"x32". If we get donations of larger sheets, then we cut it down before using it.

== Elastic Band ==

Each shield uses approximately 8 inches of button hole elastic, 3/4 inch wide.

Sources
* [https://www.homesew.com/ Home Sew]

== Assembly and Disassembly ==

'''Assembly'''

Assembly requires about 8" of 3/4 wide button hole elastic.

* A short video on [https://youtu.be/qKqDUExM4Q8 how to assemble the Maker Nexus face shield version RC2]

* The original design [https://www.prusaprinters.org/prints/25857-prusa-protective-face-shield-rc2 Prusa RC2 STL- On this page]

Each box of face shields contains a QR Code that links to [[Covid-19 Shield User Instructions]]

'''Disassembly for cleaning'''

These face shields can be taken apart for cleaning.

The sheets are made of PETG and can handle alcohol and UV. The head band and spreader could be made of PETG, ABS, or PLA. These all resist alcohol but are heat sensitive. We are not experts in how to sanitize equipment. You, as user, take responsibility for appropriate sanitization. See [https://help.prusa3d.com/en/article/prusa-face-shield-disinfection_125457#_ga=2.91675610.133084680.1585293016-139199844.1585293016 this page from Prusa Research] for information on sanitization methods currently being tested.

A short video on [https://www.youtube.com/watch?v=F7FFPzGeRME how to take the Maker Nexus face shield apart]

== Help at MN ==
At this time we do not need volunteers in the makerspace itself. The space is on lockdown so that we do not introduce the virus into our work area.

'''Donations Needed'''

* PETG filament is useful - if you aren't able to print yourself. Any color in both 1.75mm and 3mm diameter filament. It should be in a factory sealed box or in a bag with desiccant.
* 3/4"-1" button hole elastic
* 0.020" thick PETG film for disposable masks, sheets or rolls

You can drop-off the donations at Maker Nexus, just leave it in the box by the front door of Maker Nexus. Please use appropriate procedures when packaging - including wearing a new pair of gloves and a face mask if available.

You can also donate via PayPal towards COVID-19 efforts that Maker Nexus is working on. [http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Who to contact'''

MN members join the #covid-faceshield channel on [https://www.makernexus.com/member-dashboard Slack]

If you don't have access to Slack, please email [mailto:faceshields@makernexus.org faceshields@makernexus.org]

== External Links ==

=== Information & Discussions ===
- [https://join.slack.com/t/prusafaceshields/shared_invite/zt-cz809azp-f41jGEYZivRKWH6IcYEmKw External slack for Prusa Shield discussions]

== Status ==
As of 3/29/2020

* We have 15 3D printers at Maker Nexus and 205 printers at homes through out the community.

* We have enough 0.020/0.030 PETg sheets to make about 4000 more shields. This is hard to buy now and we are testing alternatives.

* We have enough filament to keep our printers running and are buying more. Our preferred filament is now on back order and we are sourcing directly from China.

* We are exploring injection molding for the head bands. This may take some time.

* We have shipped over 650 face shields. Yea! That is what it's all about.

File:Covid-headband-build-plate.png

2020-03-29T22:36:55Z

Hzeller: Overview rendering of the build-plate for the face shield headband.

Overview rendering of the build-plate for the face shield headband.

3D printed face shields

2020-03-29T22:31:27Z

Hzeller: /* RC2 + MakerNexus extensions (PREFERRED) */

[[File:Face shield front.jpg|200px]] [[File:Face shield side.jpg|350px]] [[File:Face shield top.jpg|350px]]

== Overview ==
Face shields are used by health care professionals to protect them when working with patients. Hospital supplies are running low. While they prefer to use commercially manufactured ones, in this emergency they are looking for alternative sources.

The headband portion of these shields is made on a 3D printer. If you have a 3D printer, you can make these. We have several at Maker Nexus that will be running as long as we have supplies. We deliver them to local hospitals.

* [https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform Sign up to use your own 3D printer] to help
* [https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform Sign up to receive face shields] for your health care facility

'''In the News'''

* A TV segment [https://sanfrancisco.cbslocal.com/video/4495791-maker-community-uses-3-d-printer-to-supply-ppe-to-health-professionals/ from KPIX]
* Watch a short [https://www.ktvu.com/news/covid-19-sunnyvale-company-designing-3d-protective-masks-to-meet-demand KTVU news report about our efforts.]

'''How much do they cost?'''

We give these away, paying for them from donations. We do not sell them. Promises of donations or actual donations do not affect who is prioritized to receive the PPE. The allocation team is not told who has donated. However, they cost us about $5 each to make. Donations are critical for us to be able to keep producing. We will make them until the money runs out.

[http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Is there really a need?'''

* We've heard from friends that "nurses are cutting up plastic soda bottles to make face shields, using saran wrap on top of N95 masks to allow for multi-use."
* One local nurse said they are making face shields from cut up shower curtains and hot glue guns.
* In reviewing the current design: "The nurses were over the moon about how easily the shields can be disassembled and sterilized."
* A nurse from Marin called us and I got her hooked into the allocation process and told her they were free. She started crying on the phone. - JimS

We are ramping up to make 1,000 a week, maybe more.

'''How do I get some?'''

If your health care facility needs face shields, fill in this form:

[https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform?usp=sf_link My Facility Needs Face Shields] (click the link)

A link to [[MN COVID Response|Other COVID Projects]]

== 3D Print Parts At Home ==

=== Use Your 3D Printer for good ===

'''Sign up'''

We are establishing a network of 3D printer owners who can make the headbands for us. You make them and deliver them to our facility where we do the assembly and get them to the hospitals. If you want to be part of our network, fill in this form and we will contact you:

[https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform I want to help make them]

'''Report your progress'''

If you've signed-up and started printing already:
[https://docs.google.com/spreadsheets/d/1Aoq7a0YbkPbGiMZGSxBgo0ySlgDWZHoaCvXc8sx9FU8/edit Keep us updated with your print progress].
Please request permission to access the file if you're prompted to, and we'll respond as quickly as we can.

=== What to do with the finished product ===
When you have parts ready to deliver, please follow the following steps:
# Fill out [https://docs.google.com/forms/d/e/1FAIpQLSdJfZz5M-xxQifJmFBdNQcn7c3i5eFabV7StA5ep9zsJuco9Q/viewform?usp=sf_link this form] with information about your donation (so we can track inventory)
# Seal in plastic bag.
# Label bag with your email, the version of face shield you printed (e.g. "MN 1.3" see releases in parts below; or "RC2" if you used that), the material printed with and the date you closed the bag.
# Mail to
Maker Nexus
234 E. Carribean Drive
Sunnyvale, CA 94089
OR
Deliver to us if you are local and it does not violate the Shelter In Place Order - please do not make a special trip for this - but if you are passing by on your way to get essential groceries and want to drop it off, that is acceptable - there is a box outside our front door where donated parts can be placed.

Please be sure you are following proper sanitation procedures when you bag parts - if possible, wear gloves and a breathing mask, wipe or spray with disinfectant if available. We want to minimize the chance of cross-contamination. After it reaches MN, we will be further disinfecting them before delivering to its end destination.

We are not in a position to supply you with filament. If we are successful at raising more money for this program, then we might be able to give you a new reel when you drop off 20 face shield sets.

== 3D Print Directions ==

=== Materials ===

'''PETG filament Sources'''

These face shields are best done with PETG filament. A 1kg spool can make about 20 units.

* [http://matterhackers.com Matter Hackers]
** 3mm product id # MF3CF7NH 1kg about $25
** 1.75mm product id # M3MY2VQG 1kg about $24 (only $20 each if you buy 5)
** 1.75mm product id # MTVEPT25 10 pounds (4.5kg) about $185 It is a higher quality PETG filament, but is it really worth the extra cost?

'''PETG Sheet Sources'''

One 48x96 inch sheet can make about 24 shields.

* [http://www.piedmontplastics.com Piedmont Plastics] in San Leandro, CA. .020x48x96 CLR VIVAK PETG JFM about $16/sheet.

=== Instructions ===

'''Printer Settings'''

Print with PETG for ease of sanitation - IPA, Hydrogen Peroxide, Bleach, and Acetic Acid up to 10% can all be safely used with PETG.

Print settings:
* Temperature based on filament selection.
* 3 perimeters
* 100% infill
* 0.3mm Draft settings in PrusaSlicer work fine
* we are running our Prusa's at 130% speed

=== Parts ===
We are focusing production on the Prusa RC2 headband with some modification to reduce weight and center the mounting pins, based on feedback from medical professionals.
If your printer is large enough to print this design, PLEASE switch production to that. If your printer cannot accommodate that, RC1 pieces are still helpful. See below for details on each.

==== RC2 + MakerNexus extensions (PREFERRED) ====

The MakerNexus modifications [https://github.com/hzeller/prusa-covid19-shield-remix are on github].
Easiest is to download the release at https://github.com/hzeller/prusa-covid19-shield-remix/releases (latest is v1.3 from 2020-03-28 noon)

This archive contains (next to the source files) the following files used used to print, which you also can download here:

* '''Ready-to-go''': [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.3/normal_shield_0.3mm_PETG_MK3S.gcode normal_shield_0.3mm_PETG_MK3S.gcode] (right click, download or ''save link as...'') '''GCode''' for MK3S printer for PETG 0.3mm, 3 shells, 100% infill; printing two headbands. This places two headbands and two bottom supports on the bed. You can use this directly in your Prusa MK3/MK3S printer. Using print-speed of 130% on the Prusa seems to work fine.
* '''modify print parameters''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.3/normal_shield.3mf normal_shield.3mf] '''3MF''' file to load in slicer. Places two headbands with bottom braces on the bed, lets arrange yourself and change printing parameters. Contains support-material setup.
* '''slice yourself''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.3/normal_shield_with_support.stl normal_shield_with_support.stl] (right click, download or ''save link as...'') The '''STL''' file. It already contains integrated supports for the pins, no support needs to be enabled in your slicer. If the built-in supports look like they are 'hovering', enable 'thin wall detection' in your slicer. The file named normal_shield_no_support.stl does not have supports if you want to use your slicer to do support.

==== Other Versions ====

Instead of Prusa RC2 or RC3, please use the version above, as it contains changes we got as feedback from
our local healthcare community.

We're working on a stacked version that prints reliably, but if you want/need to print stacked, as an
exception to the above, you can use the Prusa pre-arranged to print 3 at one time.
* [[:media:COVID19 SHIELD R1 3x.stl|Prusa RC1 (x3)]] STL File
For other arrangements, here's the [https://www.prusaprinters.org/prints/25857-protective-face-shield-rc1 original Prusa design page].

== Laser Cut Parts ==

* [[:media:Wrapover-faceshield-laser.svg|The SVG file for laser cutting the shield part]] SVG File

The shields are cut from 0.020 inch thick PETG sheets. Our base design fits into sheets of 24"x32". If we get donations of larger sheets, then we cut it down before using it.

== Elastic Band ==

Each shield uses approximately 8 inches of button hole elastic, 3/4 inch wide.

Sources
* [https://www.homesew.com/ Home Sew]

== Assembly and Disassembly ==

'''Assembly'''

Assembly requires about 8" of 3/4 wide button hole elastic.

* A short video on [https://youtu.be/qKqDUExM4Q8 how to assemble the Maker Nexus face shield version RC2]

* The original design [https://www.prusaprinters.org/prints/25857-prusa-protective-face-shield-rc2 Prusa RC2 STL- On this page]

Each box of face shields contains a QR Code that links to [[Covid-19 Shield User Instructions]]

'''Disassembly for cleaning'''

These face shields can be taken apart for cleaning.

The sheets are made of PETG and can handle alcohol and UV. The head band and spreader could be made of PETG, ABS, or PLA. These all resist alcohol but are heat sensitive. We are not experts in how to sanitize equipment. You, as user, take responsibility for appropriate sanitization. See [https://help.prusa3d.com/en/article/prusa-face-shield-disinfection_125457#_ga=2.91675610.133084680.1585293016-139199844.1585293016 this page from Prusa Research] for information on sanitization methods currently being tested.

A short video on [https://www.youtube.com/watch?v=F7FFPzGeRME how to take the Maker Nexus face shield apart]

== Help at MN ==
At this time we do not need volunteers in the makerspace itself. The space is on lockdown so that we do not introduce the virus into our work area.

'''Donations Needed'''

* PETG filament is useful - if you aren't able to print yourself. Any color in both 1.75mm and 3mm diameter filament. It should be in a factory sealed box or in a bag with desiccant.
* 3/4"-1" button hole elastic
* 0.020" thick PETG film for disposable masks, sheets or rolls

You can drop-off the donations at Maker Nexus, just leave it in the box by the front door of Maker Nexus. Please use appropriate procedures when packaging - including wearing a new pair of gloves and a face mask if available.

You can also donate via PayPal towards COVID-19 efforts that Maker Nexus is working on. [http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Who to contact'''

MN members join the #covid-faceshield channel on [https://www.makernexus.com/member-dashboard Slack]

If you don't have access to Slack, please email [mailto:faceshields@makernexus.org faceshields@makernexus.org]

== External Links ==

=== Information & Discussions ===
- [https://join.slack.com/t/prusafaceshields/shared_invite/zt-cz809azp-f41jGEYZivRKWH6IcYEmKw External slack for Prusa Shield discussions]

== Status ==
As of 3/29/2020

* We have 15 3D printers at Maker Nexus and 205 printers at homes through out the community.

* We have enough 0.020/0.030 PETg sheets to make about 4000 more shields. This is hard to buy now and we are testing alternatives.

* We have enough filament to keep our printers running and are buying more. Our preferred filament is now on back order and we are sourcing directly from China.

* We are exploring injection molding for the head bands. This may take some time.

* We have shipped over 650 face shields. Yea! That is what it's all about.

3D printed face shields

2020-03-29T22:30:43Z

Hzeller: /* RC2 + MakerNexus extensions (PREFERRED) */

[[File:Face shield front.jpg|200px]] [[File:Face shield side.jpg|350px]] [[File:Face shield top.jpg|350px]]

== Overview ==
Face shields are used by health care professionals to protect them when working with patients. Hospital supplies are running low. While they prefer to use commercially manufactured ones, in this emergency they are looking for alternative sources.

The headband portion of these shields is made on a 3D printer. If you have a 3D printer, you can make these. We have several at Maker Nexus that will be running as long as we have supplies. We deliver them to local hospitals.

* [https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform Sign up to use your own 3D printer] to help
* [https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform Sign up to receive face shields] for your health care facility

'''In the News'''

* A TV segment [https://sanfrancisco.cbslocal.com/video/4495791-maker-community-uses-3-d-printer-to-supply-ppe-to-health-professionals/ from KPIX]
* Watch a short [https://www.ktvu.com/news/covid-19-sunnyvale-company-designing-3d-protective-masks-to-meet-demand KTVU news report about our efforts.]

'''How much do they cost?'''

We give these away, paying for them from donations. We do not sell them. Promises of donations or actual donations do not affect who is prioritized to receive the PPE. The allocation team is not told who has donated. However, they cost us about $5 each to make. Donations are critical for us to be able to keep producing. We will make them until the money runs out.

[http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Is there really a need?'''

* We've heard from friends that "nurses are cutting up plastic soda bottles to make face shields, using saran wrap on top of N95 masks to allow for multi-use."
* One local nurse said they are making face shields from cut up shower curtains and hot glue guns.
* In reviewing the current design: "The nurses were over the moon about how easily the shields can be disassembled and sterilized."
* A nurse from Marin called us and I got her hooked into the allocation process and told her they were free. She started crying on the phone. - JimS

We are ramping up to make 1,000 a week, maybe more.

'''How do I get some?'''

If your health care facility needs face shields, fill in this form:

[https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform?usp=sf_link My Facility Needs Face Shields] (click the link)

A link to [[MN COVID Response|Other COVID Projects]]

== 3D Print Parts At Home ==

=== Use Your 3D Printer for good ===

'''Sign up'''

We are establishing a network of 3D printer owners who can make the headbands for us. You make them and deliver them to our facility where we do the assembly and get them to the hospitals. If you want to be part of our network, fill in this form and we will contact you:

[https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform I want to help make them]

'''Report your progress'''

If you've signed-up and started printing already:
[https://docs.google.com/spreadsheets/d/1Aoq7a0YbkPbGiMZGSxBgo0ySlgDWZHoaCvXc8sx9FU8/edit Keep us updated with your print progress].
Please request permission to access the file if you're prompted to, and we'll respond as quickly as we can.

=== What to do with the finished product ===
When you have parts ready to deliver, please follow the following steps:
# Fill out [https://docs.google.com/forms/d/e/1FAIpQLSdJfZz5M-xxQifJmFBdNQcn7c3i5eFabV7StA5ep9zsJuco9Q/viewform?usp=sf_link this form] with information about your donation (so we can track inventory)
# Seal in plastic bag.
# Label bag with your email, the version of face shield you printed (e.g. "MN 1.3" see releases in parts below; or "RC2" if you used that), the material printed with and the date you closed the bag.
# Mail to
Maker Nexus
234 E. Carribean Drive
Sunnyvale, CA 94089
OR
Deliver to us if you are local and it does not violate the Shelter In Place Order - please do not make a special trip for this - but if you are passing by on your way to get essential groceries and want to drop it off, that is acceptable - there is a box outside our front door where donated parts can be placed.

Please be sure you are following proper sanitation procedures when you bag parts - if possible, wear gloves and a breathing mask, wipe or spray with disinfectant if available. We want to minimize the chance of cross-contamination. After it reaches MN, we will be further disinfecting them before delivering to its end destination.

We are not in a position to supply you with filament. If we are successful at raising more money for this program, then we might be able to give you a new reel when you drop off 20 face shield sets.

== 3D Print Directions ==

=== Materials ===

'''PETG filament Sources'''

These face shields are best done with PETG filament. A 1kg spool can make about 20 units.

* [http://matterhackers.com Matter Hackers]
** 3mm product id # MF3CF7NH 1kg about $25
** 1.75mm product id # M3MY2VQG 1kg about $24 (only $20 each if you buy 5)
** 1.75mm product id # MTVEPT25 10 pounds (4.5kg) about $185 It is a higher quality PETG filament, but is it really worth the extra cost?

'''PETG Sheet Sources'''

One 48x96 inch sheet can make about 24 shields.

* [http://www.piedmontplastics.com Piedmont Plastics] in San Leandro, CA. .020x48x96 CLR VIVAK PETG JFM about $16/sheet.

=== Instructions ===

'''Printer Settings'''

Print with PETG for ease of sanitation - IPA, Hydrogen Peroxide, Bleach, and Acetic Acid up to 10% can all be safely used with PETG.

Print settings:
* Temperature based on filament selection.
* 3 perimeters
* 100% infill
* 0.3mm Draft settings in PrusaSlicer work fine
* we are running our Prusa's at 130% speed

=== Parts ===
We are focusing production on the Prusa RC2 headband with some modification to reduce weight and center the mounting pins, based on feedback from medical professionals.
If your printer is large enough to print this design, PLEASE switch production to that. If your printer cannot accommodate that, RC1 pieces are still helpful. See below for details on each.

==== RC2 + MakerNexus extensions (PREFERRED) ====

The MakerNexus modifications [https://github.com/hzeller/prusa-covid19-shield-remix are on github].
Easiest is to download the release at https://github.com/hzeller/prusa-covid19-shield-remix/releases (latest is v1.3 from 2020-03-28 noon)

This archive contains (next to the source files) the following files used used to print, which you also can download here:

* '''Ready-to-go''': [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.3/normal_shield_0.3mm_PETG_MK3S.gcode normal_shield_0.3mm_PETG_MK3S.gcode] (right click, ''save link as'') '''GCode''' for MK3S printer for PETG 0.3mm, 3 shells, 100% infill; printing two headbands. This places two headbands and two bottom supports on the bed. You can use this directly in your Prusa MK3/MK3S printer. Using print-speed of 130% on the Prusa seems to work fine.
* '''modify print parameters''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.3/normal_shield.3mf normal_shield.3mf] '''3MF''' file to load in slicer. Places two headbands with bottom braces on the bed, lets arrange yourself and change printing parameters. Contains support-material setup.
* '''slice yourself''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.3/normal_shield_with_support.stl normal_shield_with_support.stl] (right click, ''save link as'') The '''STL''' file. It already contains integrated supports for the pins, no support needs to be enabled in your slicer. If the built-in supports look like they are 'hovering', enable 'thin wall detection' in your slicer. The file named normal_shield_no_support.stl does not have supports if you want to use your slicer to do support.

==== Other Versions ====

Instead of Prusa RC2 or RC3, please use the version above, as it contains changes we got as feedback from
our local healthcare community.

We're working on a stacked version that prints reliably, but if you want/need to print stacked, as an
exception to the above, you can use the Prusa pre-arranged to print 3 at one time.
* [[:media:COVID19 SHIELD R1 3x.stl|Prusa RC1 (x3)]] STL File
For other arrangements, here's the [https://www.prusaprinters.org/prints/25857-protective-face-shield-rc1 original Prusa design page].

== Laser Cut Parts ==

* [[:media:Wrapover-faceshield-laser.svg|The SVG file for laser cutting the shield part]] SVG File

The shields are cut from 0.020 inch thick PETG sheets. Our base design fits into sheets of 24"x32". If we get donations of larger sheets, then we cut it down before using it.

== Elastic Band ==

Each shield uses approximately 8 inches of button hole elastic, 3/4 inch wide.

Sources
* [https://www.homesew.com/ Home Sew]

== Assembly and Disassembly ==

'''Assembly'''

Assembly requires about 8" of 3/4 wide button hole elastic.

* A short video on [https://youtu.be/qKqDUExM4Q8 how to assemble the Maker Nexus face shield version RC2]

* The original design [https://www.prusaprinters.org/prints/25857-prusa-protective-face-shield-rc2 Prusa RC2 STL- On this page]

Each box of face shields contains a QR Code that links to [[Covid-19 Shield User Instructions]]

'''Disassembly for cleaning'''

These face shields can be taken apart for cleaning.

The sheets are made of PETG and can handle alcohol and UV. The head band and spreader could be made of PETG, ABS, or PLA. These all resist alcohol but are heat sensitive. We are not experts in how to sanitize equipment. You, as user, take responsibility for appropriate sanitization. See [https://help.prusa3d.com/en/article/prusa-face-shield-disinfection_125457#_ga=2.91675610.133084680.1585293016-139199844.1585293016 this page from Prusa Research] for information on sanitization methods currently being tested.

A short video on [https://www.youtube.com/watch?v=F7FFPzGeRME how to take the Maker Nexus face shield apart]

== Help at MN ==
At this time we do not need volunteers in the makerspace itself. The space is on lockdown so that we do not introduce the virus into our work area.

'''Donations Needed'''

* PETG filament is useful - if you aren't able to print yourself. Any color in both 1.75mm and 3mm diameter filament. It should be in a factory sealed box or in a bag with desiccant.
* 3/4"-1" button hole elastic
* 0.020" thick PETG film for disposable masks, sheets or rolls

You can drop-off the donations at Maker Nexus, just leave it in the box by the front door of Maker Nexus. Please use appropriate procedures when packaging - including wearing a new pair of gloves and a face mask if available.

You can also donate via PayPal towards COVID-19 efforts that Maker Nexus is working on. [http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Who to contact'''

MN members join the #covid-faceshield channel on [https://www.makernexus.com/member-dashboard Slack]

If you don't have access to Slack, please email [mailto:faceshields@makernexus.org faceshields@makernexus.org]

== External Links ==

=== Information & Discussions ===
- [https://join.slack.com/t/prusafaceshields/shared_invite/zt-cz809azp-f41jGEYZivRKWH6IcYEmKw External slack for Prusa Shield discussions]

== Status ==
As of 3/29/2020

* We have 15 3D printers at Maker Nexus and 205 printers at homes through out the community.

* We have enough 0.020/0.030 PETg sheets to make about 4000 more shields. This is hard to buy now and we are testing alternatives.

* We have enough filament to keep our printers running and are buying more. Our preferred filament is now on back order and we are sourcing directly from China.

* We are exploring injection molding for the head bands. This may take some time.

* We have shipped over 650 face shields. Yea! That is what it's all about.

3D printed face shields

2020-03-29T21:02:44Z

Hzeller: /* What to do with the finished product */

[[File:Face shield front.jpg|200px]] [[File:Face shield side.jpg|350px]] [[File:Face shield top.jpg|350px]]

== Overview ==
Face shields are used by health care professionals to protect them when working with patients. Hospital supplies are running low. While they prefer to use commercially manufactured ones, in this emergency they are looking for alternative sources.

The headband portion of these shields is made on a 3D printer. If you have a 3D printer, you can make these. We have several at Maker Nexus that will be running as long as we have supplies. We deliver them to local hospitals.

* [https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform Sign up to use your own 3D printer] to help
* [https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform Sign up to receive face shields] for your health care facility

'''In the News'''

* A TV segment [https://sanfrancisco.cbslocal.com/video/4495791-maker-community-uses-3-d-printer-to-supply-ppe-to-health-professionals/ from KPIX]
* Watch a short [https://www.ktvu.com/news/covid-19-sunnyvale-company-designing-3d-protective-masks-to-meet-demand KTVU news report about our efforts.]

'''How much do they cost?'''

We give these away, paying for them from donations. We do not sell them. Promises of donations or actual donations do not affect who is prioritized to receive the PPE. The allocation team is not told who has donated. However, they cost us about $5 each to make. Donations are critical for us to be able to keep producing. We will make them until the money runs out.

[http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Is there really a need?'''

* We've heard from friends that "nurses are cutting up plastic soda bottles to make face shields, using saran wrap on top of N95 masks to allow for multi-use."
* One local nurse said they are making face shields from cut up shower curtains and hot glue guns.
* In reviewing the current design: "The nurses were over the moon about how easily the shields can be disassembled and sterilized."
* A nurse from Marin called us and I got her hooked into the allocation process and told her they were free. She started crying on the phone. - JimS

We are ramping up to make 1,000 a week, maybe more.

'''How do I get some?'''

If your health care facility needs face shields, fill in this form:

[https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform?usp=sf_link My Facility Needs Face Shields] (click the link)

A link to [[MN COVID Response|Other COVID Projects]]

== 3D Print Parts At Home ==

=== Use Your 3D Printer for good ===

'''Sign up'''

We are establishing a network of 3D printer owners who can make the headbands for us. You make them and deliver them to our facility where we do the assembly and get them to the hospitals. If you want to be part of our network, fill in this form and we will contact you:

[https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform I want to help make them]

'''Report your progress'''

If you've signed-up and started printing already:
[https://docs.google.com/spreadsheets/d/1Aoq7a0YbkPbGiMZGSxBgo0ySlgDWZHoaCvXc8sx9FU8/edit Keep us updated with your print progress].
Please request permission to access the file if you're prompted to, and we'll respond as quickly as we can.

=== What to do with the finished product ===
When you have parts ready to deliver, please follow the following steps:
# Fill out [https://docs.google.com/forms/d/e/1FAIpQLSdJfZz5M-xxQifJmFBdNQcn7c3i5eFabV7StA5ep9zsJuco9Q/viewform?usp=sf_link this form] with information about your donation (so we can track inventory)
# Seal in plastic bag.
# Label bag with your email, the version of face shield you printed (e.g. "MN 1.3" see releases in parts below; or "RC2" if you used that), the material printed with and the date you closed the bag.
# Mail to
Maker Nexus
234 E. Carribean Drive
Sunnyvale, CA 94089
OR
Deliver to us if you are local and it does not violate the Shelter In Place Order - please do not make a special trip for this - but if you are passing by on your way to get essential groceries and want to drop it off, that is acceptable - there is a box outside our front door where donated parts can be placed.

Please be sure you are following proper sanitation procedures when you bag parts - if possible, wear gloves and a breathing mask, wipe or spray with disinfectant if available. We want to minimize the chance of cross-contamination. After it reaches MN, we will be further disinfecting them before delivering to its end destination.

We are not in a position to supply you with filament. If we are successful at raising more money for this program, then we might be able to give you a new reel when you drop off 20 face shield sets.

== 3D Print Directions ==

=== Materials ===

'''PETG filament Sources'''

These face shields are best done with PETG filament. A 1kg spool can make about 20 units.

* [http://matterhackers.com Matter Hackers]
** 3mm product id # MF3CF7NH 1kg about $25
** 1.75mm product id # M3MY2VQG 1kg about $24 (only $20 each if you buy 5)
** 1.75mm product id # MTVEPT25 10 pounds (4.5kg) about $185 It is a higher quality PETG filament, but is it really worth the extra cost?

'''PETG Sheet Sources'''

One 48x96 inch sheet can make about 24 shields.

* [http://www.piedmontplastics.com Piedmont Plastics] in San Leandro, CA. .020x48x96 CLR VIVAK PETG JFM about $16/sheet.

=== Instructions ===

'''Printer Settings'''

Print with PETG for ease of sanitation - IPA, Hydrogen Peroxide, Bleach, and Acetic Acid up to 10% can all be safely used with PETG.

Print settings:
* Temperature based on filament selection.
* 3 perimeters
* 100% infill
* 0.3mm Draft settings in PrusaSlicer work fine
* we are running our Prusa's at 130% speed

=== Parts ===
We are focusing production on the Prusa RC2 headband with some modification to reduce weight and center the mounting pins, based on feedback from medical professionals.
If your printer is large enough to print this design, PLEASE switch production to that. If your printer cannot accommodate that, RC1 pieces are still helpful. See below for details on each.

==== RC2 + MakerNexus extensions (PREFERRED) ====

The MakerNexus modifications [https://github.com/hzeller/prusa-covid19-shield-remix are on github].
Easiest is to download the release at https://github.com/hzeller/prusa-covid19-shield-remix/releases (latest is v1.3 from 2020-03-28 noon)

This archive contains (next to the source files) the following files used used to print, which you also can download here:

* '''Ready-to-go''': [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.3/normal_shield_0.3mm_PETG_MK3S.gcode normal_shield_0.3mm_PETG_MK3S.gcode] '''GCode''' for MK3S printer for PETG 0.3mm, 3 shells, 100% infill; printing two headbands. This places two headbands and two bottom supports on the bed. You can use this directly in your Prusa MK3/MK3S printer. Using print-speed of 130% on the Prusa seems to work fine.
* '''modify print parameters''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.3/normal_shield.3mf normal_shield.3mf] '''3MF''' file to load in slicer. Places two headbands with bottom braces on the bed, lets arrange yourself and change printing parameters. Contains support-material setup.
* '''slice yourself''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.3/normal_shield_with_support.stl normal_shield_with_support.stl] The '''STL''' file. It already contains integrated supports for the pins, no support needs to be enabled in your slicer. If the built-in supports look like they are 'hovering', enable 'thin wall detection' in your slicer. The file named normal_shield_no_support.stl does not have supports if you want to use your slicer to do support.

==== Other Versions ====

Instead of Prusa RC2 or RC3, please use the version above, as it contains changes we got as feedback from
our local healthcare community.

We're working on a stacked version that prints reliably, but if you want/need to print stacked, as an
exception to the above, you can use the Prusa pre-arranged to print 3 at one time.
* [[:media:COVID19 SHIELD R1 3x.stl|Prusa RC1 (x3)]] STL File
For other arrangements, here's the [https://www.prusaprinters.org/prints/25857-protective-face-shield-rc1 original Prusa design page].

== Laser Cut Parts ==

* [[:media:Wrapover-faceshield-laser.svg|The SVG file for laser cutting the shield part]] SVG File

The shields are cut from 0.020 inch thick PETG sheets. Our base design fits into sheets of 24"x32". If we get donations of larger sheets, then we cut it down before using it.

== Elastic Band ==

Each shield uses approximately 8 inches of button hole elastic, 3/4 inch wide.

Sources
* [https://www.homesew.com/ Home Sew]

== Assembly and Disassembly ==

'''Assembly'''

Assembly requires about 8" of 3/4 wide button hole elastic.

* A short video on [https://youtu.be/qKqDUExM4Q8 how to assemble the Maker Nexus face shield version RC2]

* The original design [https://www.prusaprinters.org/prints/25857-prusa-protective-face-shield-rc2 Prusa RC2 STL- On this page]

Each box of face shields contains a QR Code that links to [[Covid-19 Shield User Instructions]]

'''Disassembly for cleaning'''

These face shields can be taken apart for cleaning.

The sheets are made of PETG and can handle alcohol and UV. The head band and spreader could be made of PETG, ABS, or PLA. These all resist alcohol but are heat sensitive. We are not experts in how to sanitize equipment. You, as user, take responsibility for appropriate sanitization. See [https://help.prusa3d.com/en/article/prusa-face-shield-disinfection_125457#_ga=2.91675610.133084680.1585293016-139199844.1585293016 this page from Prusa Research] for information on sanitization methods currently being tested.

A short video on [https://www.youtube.com/watch?v=F7FFPzGeRME how to take the Maker Nexus face shield apart]

== Help at MN ==
At this time we do not need volunteers in the makerspace itself. The space is on lockdown so that we do not introduce the virus into our work area.

'''Donations Needed'''

* PETG filament is useful - if you aren't able to print yourself. Any color in both 1.75mm and 3mm diameter filament. It should be in a factory sealed box or in a bag with desiccant.
* 3/4"-1" button hole elastic
* 0.020" thick PETG film for disposable masks, sheets or rolls

You can drop-off the donations at Maker Nexus, just leave it in the box by the front door of Maker Nexus. Please use appropriate procedures when packaging - including wearing a new pair of gloves and a face mask if available.

You can also donate via PayPal towards COVID-19 efforts that Maker Nexus is working on. [http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Who to contact'''

MN members join the #covid-faceshield channel on [https://www.makernexus.com/member-dashboard Slack]

If you don't have access to Slack, please email [mailto:faceshields@makernexus.org faceshields@makernexus.org]

== External Links ==

=== Information & Discussions ===
- [https://join.slack.com/t/prusafaceshields/shared_invite/zt-cz809azp-f41jGEYZivRKWH6IcYEmKw External slack for Prusa Shield discussions]

== Status ==
As of 3/29/2020

* We have 15 3D printers at Maker Nexus and 205 printers at homes through out the community.

* We have enough 0.020/0.030 PETg sheets to make about 4000 more shields. This is hard to buy now and we are testing alternatives.

* We have enough filament to keep our printers running and are buying more. Our preferred filament is now on back order and we are sourcing directly from China.

* We are exploring injection molding for the head bands. This may take some time.

* We have shipped over 650 face shields. Yea! That is what it's all about.

3D printed face shields

2020-03-29T21:01:54Z

Hzeller: /* What to do with the finished product */

[[File:Face shield front.jpg|200px]] [[File:Face shield side.jpg|350px]] [[File:Face shield top.jpg|350px]]

== Overview ==
Face shields are used by health care professionals to protect them when working with patients. Hospital supplies are running low. While they prefer to use commercially manufactured ones, in this emergency they are looking for alternative sources.

The headband portion of these shields is made on a 3D printer. If you have a 3D printer, you can make these. We have several at Maker Nexus that will be running as long as we have supplies. We deliver them to local hospitals.

* [https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform Sign up to use your own 3D printer] to help
* [https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform Sign up to receive face shields] for your health care facility

'''In the News'''

* A TV segment [https://sanfrancisco.cbslocal.com/video/4495791-maker-community-uses-3-d-printer-to-supply-ppe-to-health-professionals/ from KPIX]
* Watch a short [https://www.ktvu.com/news/covid-19-sunnyvale-company-designing-3d-protective-masks-to-meet-demand KTVU news report about our efforts.]

'''How much do they cost?'''

We give these away, paying for them from donations. We do not sell them. Promises of donations or actual donations do not affect who is prioritized to receive the PPE. The allocation team is not told who has donated. However, they cost us about $5 each to make. Donations are critical for us to be able to keep producing. We will make them until the money runs out.

[http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Is there really a need?'''

* We've heard from friends that "nurses are cutting up plastic soda bottles to make face shields, using saran wrap on top of N95 masks to allow for multi-use."
* One local nurse said they are making face shields from cut up shower curtains and hot glue guns.
* In reviewing the current design: "The nurses were over the moon about how easily the shields can be disassembled and sterilized."
* A nurse from Marin called us and I got her hooked into the allocation process and told her they were free. She started crying on the phone. - JimS

We are ramping up to make 1,000 a week, maybe more.

'''How do I get some?'''

If your health care facility needs face shields, fill in this form:

[https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform?usp=sf_link My Facility Needs Face Shields] (click the link)

A link to [[MN COVID Response|Other COVID Projects]]

== 3D Print Parts At Home ==

=== Use Your 3D Printer for good ===

'''Sign up'''

We are establishing a network of 3D printer owners who can make the headbands for us. You make them and deliver them to our facility where we do the assembly and get them to the hospitals. If you want to be part of our network, fill in this form and we will contact you:

[https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform I want to help make them]

'''Report your progress'''

If you've signed-up and started printing already:
[https://docs.google.com/spreadsheets/d/1Aoq7a0YbkPbGiMZGSxBgo0ySlgDWZHoaCvXc8sx9FU8/edit Keep us updated with your print progress].
Please request permission to access the file if you're prompted to, and we'll respond as quickly as we can.

=== What to do with the finished product ===
When you have parts ready to deliver, please follow the following steps:
# Fill out [https://docs.google.com/forms/d/e/1FAIpQLSdJfZz5M-xxQifJmFBdNQcn7c3i5eFabV7StA5ep9zsJuco9Q/viewform?usp=sf_link this form] with information about your donation (so we can track inventory)
# Seal in plastic bag.
# Label bag with your email, the version of face shield you printed (e.g. "MN 1.3" see releases above; or "RC2" if you used that), the material printed with and the date you closed the bag.
# Mail to
Maker Nexus
234 E. Carribean Drive
Sunnyvale, CA 94089
OR
Deliver to us if you are local and it does not violate the Shelter In Place Order - please do not make a special trip for this - but if you are passing by on your way to get essential groceries and want to drop it off, that is acceptable - there is a box outside our front door where donated parts can be placed.

Please be sure you are following proper sanitation procedures when you bag parts - if possible, wear gloves and a breathing mask, wipe or spray with disinfectant if available. We want to minimize the chance of cross-contamination. After it reaches MN, we will be further disinfecting them before delivering to its end destination.

We are not in a position to supply you with filament. If we are successful at raising more money for this program, then we might be able to give you a new reel when you drop off 20 face shield sets.

== 3D Print Directions ==

=== Materials ===

'''PETG filament Sources'''

These face shields are best done with PETG filament. A 1kg spool can make about 20 units.

* [http://matterhackers.com Matter Hackers]
** 3mm product id # MF3CF7NH 1kg about $25
** 1.75mm product id # M3MY2VQG 1kg about $24 (only $20 each if you buy 5)
** 1.75mm product id # MTVEPT25 10 pounds (4.5kg) about $185 It is a higher quality PETG filament, but is it really worth the extra cost?

'''PETG Sheet Sources'''

One 48x96 inch sheet can make about 24 shields.

* [http://www.piedmontplastics.com Piedmont Plastics] in San Leandro, CA. .020x48x96 CLR VIVAK PETG JFM about $16/sheet.

=== Instructions ===

'''Printer Settings'''

Print with PETG for ease of sanitation - IPA, Hydrogen Peroxide, Bleach, and Acetic Acid up to 10% can all be safely used with PETG.

Print settings:
* Temperature based on filament selection.
* 3 perimeters
* 100% infill
* 0.3mm Draft settings in PrusaSlicer work fine
* we are running our Prusa's at 130% speed

=== Parts ===
We are focusing production on the Prusa RC2 headband with some modification to reduce weight and center the mounting pins, based on feedback from medical professionals.
If your printer is large enough to print this design, PLEASE switch production to that. If your printer cannot accommodate that, RC1 pieces are still helpful. See below for details on each.

==== RC2 + MakerNexus extensions (PREFERRED) ====

The MakerNexus modifications [https://github.com/hzeller/prusa-covid19-shield-remix are on github].
Easiest is to download the release at https://github.com/hzeller/prusa-covid19-shield-remix/releases (latest is v1.3 from 2020-03-28 noon)

This archive contains (next to the source files) the following files used used to print, which you also can download here:

* '''Ready-to-go''': [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.3/normal_shield_0.3mm_PETG_MK3S.gcode normal_shield_0.3mm_PETG_MK3S.gcode] '''GCode''' for MK3S printer for PETG 0.3mm, 3 shells, 100% infill; printing two headbands. This places two headbands and two bottom supports on the bed. You can use this directly in your Prusa MK3/MK3S printer. Using print-speed of 130% on the Prusa seems to work fine.
* '''modify print parameters''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.3/normal_shield.3mf normal_shield.3mf] '''3MF''' file to load in slicer. Places two headbands with bottom braces on the bed, lets arrange yourself and change printing parameters. Contains support-material setup.
* '''slice yourself''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.3/normal_shield_with_support.stl normal_shield_with_support.stl] The '''STL''' file. It already contains integrated supports for the pins, no support needs to be enabled in your slicer. If the built-in supports look like they are 'hovering', enable 'thin wall detection' in your slicer. The file named normal_shield_no_support.stl does not have supports if you want to use your slicer to do support.

==== Other Versions ====

Instead of Prusa RC2 or RC3, please use the version above, as it contains changes we got as feedback from
our local healthcare community.

We're working on a stacked version that prints reliably, but if you want/need to print stacked, as an
exception to the above, you can use the Prusa pre-arranged to print 3 at one time.
* [[:media:COVID19 SHIELD R1 3x.stl|Prusa RC1 (x3)]] STL File
For other arrangements, here's the [https://www.prusaprinters.org/prints/25857-protective-face-shield-rc1 original Prusa design page].

== Laser Cut Parts ==

* [[:media:Wrapover-faceshield-laser.svg|The SVG file for laser cutting the shield part]] SVG File

The shields are cut from 0.020 inch thick PETG sheets. Our base design fits into sheets of 24"x32". If we get donations of larger sheets, then we cut it down before using it.

== Elastic Band ==

Each shield uses approximately 8 inches of button hole elastic, 3/4 inch wide.

Sources
* [https://www.homesew.com/ Home Sew]

== Assembly and Disassembly ==

'''Assembly'''

Assembly requires about 8" of 3/4 wide button hole elastic.

* A short video on [https://youtu.be/qKqDUExM4Q8 how to assemble the Maker Nexus face shield version RC2]

* The original design [https://www.prusaprinters.org/prints/25857-prusa-protective-face-shield-rc2 Prusa RC2 STL- On this page]

Each box of face shields contains a QR Code that links to [[Covid-19 Shield User Instructions]]

'''Disassembly for cleaning'''

These face shields can be taken apart for cleaning.

The sheets are made of PETG and can handle alcohol and UV. The head band and spreader could be made of PETG, ABS, or PLA. These all resist alcohol but are heat sensitive. We are not experts in how to sanitize equipment. You, as user, take responsibility for appropriate sanitization. See [https://help.prusa3d.com/en/article/prusa-face-shield-disinfection_125457#_ga=2.91675610.133084680.1585293016-139199844.1585293016 this page from Prusa Research] for information on sanitization methods currently being tested.

A short video on [https://www.youtube.com/watch?v=F7FFPzGeRME how to take the Maker Nexus face shield apart]

== Help at MN ==
At this time we do not need volunteers in the makerspace itself. The space is on lockdown so that we do not introduce the virus into our work area.

'''Donations Needed'''

* PETG filament is useful - if you aren't able to print yourself. Any color in both 1.75mm and 3mm diameter filament. It should be in a factory sealed box or in a bag with desiccant.
* 3/4"-1" button hole elastic
* 0.020" thick PETG film for disposable masks, sheets or rolls

You can drop-off the donations at Maker Nexus, just leave it in the box by the front door of Maker Nexus. Please use appropriate procedures when packaging - including wearing a new pair of gloves and a face mask if available.

You can also donate via PayPal towards COVID-19 efforts that Maker Nexus is working on. [http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Who to contact'''

MN members join the #covid-faceshield channel on [https://www.makernexus.com/member-dashboard Slack]

If you don't have access to Slack, please email [mailto:faceshields@makernexus.org faceshields@makernexus.org]

== External Links ==

=== Information & Discussions ===
- [https://join.slack.com/t/prusafaceshields/shared_invite/zt-cz809azp-f41jGEYZivRKWH6IcYEmKw External slack for Prusa Shield discussions]

== Status ==
As of 3/29/2020

* We have 15 3D printers at Maker Nexus and 205 printers at homes through out the community.

* We have enough 0.020/0.030 PETg sheets to make about 4000 more shields. This is hard to buy now and we are testing alternatives.

* We have enough filament to keep our printers running and are buying more. Our preferred filament is now on back order and we are sourcing directly from China.

* We are exploring injection molding for the head bands. This may take some time.

* We have shipped over 650 face shields. Yea! That is what it's all about.

3D printed face shields

2020-03-29T21:01:14Z

Hzeller: /* What to do with the finished product */

[[File:Face shield front.jpg|200px]] [[File:Face shield side.jpg|350px]] [[File:Face shield top.jpg|350px]]

== Overview ==
Face shields are used by health care professionals to protect them when working with patients. Hospital supplies are running low. While they prefer to use commercially manufactured ones, in this emergency they are looking for alternative sources.

The headband portion of these shields is made on a 3D printer. If you have a 3D printer, you can make these. We have several at Maker Nexus that will be running as long as we have supplies. We deliver them to local hospitals.

* [https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform Sign up to use your own 3D printer] to help
* [https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform Sign up to receive face shields] for your health care facility

'''In the News'''

* A TV segment [https://sanfrancisco.cbslocal.com/video/4495791-maker-community-uses-3-d-printer-to-supply-ppe-to-health-professionals/ from KPIX]
* Watch a short [https://www.ktvu.com/news/covid-19-sunnyvale-company-designing-3d-protective-masks-to-meet-demand KTVU news report about our efforts.]

'''How much do they cost?'''

We give these away, paying for them from donations. We do not sell them. Promises of donations or actual donations do not affect who is prioritized to receive the PPE. The allocation team is not told who has donated. However, they cost us about $5 each to make. Donations are critical for us to be able to keep producing. We will make them until the money runs out.

[http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Is there really a need?'''

* We've heard from friends that "nurses are cutting up plastic soda bottles to make face shields, using saran wrap on top of N95 masks to allow for multi-use."
* One local nurse said they are making face shields from cut up shower curtains and hot glue guns.
* In reviewing the current design: "The nurses were over the moon about how easily the shields can be disassembled and sterilized."
* A nurse from Marin called us and I got her hooked into the allocation process and told her they were free. She started crying on the phone. - JimS

We are ramping up to make 1,000 a week, maybe more.

'''How do I get some?'''

If your health care facility needs face shields, fill in this form:

[https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform?usp=sf_link My Facility Needs Face Shields] (click the link)

A link to [[MN COVID Response|Other COVID Projects]]

== 3D Print Parts At Home ==

=== Use Your 3D Printer for good ===

'''Sign up'''

We are establishing a network of 3D printer owners who can make the headbands for us. You make them and deliver them to our facility where we do the assembly and get them to the hospitals. If you want to be part of our network, fill in this form and we will contact you:

[https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform I want to help make them]

'''Report your progress'''

If you've signed-up and started printing already:
[https://docs.google.com/spreadsheets/d/1Aoq7a0YbkPbGiMZGSxBgo0ySlgDWZHoaCvXc8sx9FU8/edit Keep us updated with your print progress].
Please request permission to access the file if you're prompted to, and we'll respond as quickly as we can.

=== What to do with the finished product ===
When you have parts ready to deliver, please follow the following steps:
# Fill out [https://docs.google.com/forms/d/e/1FAIpQLSdJfZz5M-xxQifJmFBdNQcn7c3i5eFabV7StA5ep9zsJuco9Q/viewform?usp=sf_link this form] with information about your donation (so we can track inventory)
# Seal in plastic bag.
# Label bag with your email, the version of face shield you printed (e.g. MN 1.3 see releases above), the material printed with and the date you closed the bag.
# Mail to
Maker Nexus
234 E. Carribean Drive
Sunnyvale, CA 94089
OR
Deliver to us if you are local and it does not violate the Shelter In Place Order - please do not make a special trip for this - but if you are passing by on your way to get essential groceries and want to drop it off, that is acceptable - there is a box outside our front door where donated parts can be placed.

Please be sure you are following proper sanitation procedures when you bag parts - if possible, wear gloves and a breathing mask, wipe or spray with disinfectant if available. We want to minimize the chance of cross-contamination. After it reaches MN, we will be further disinfecting them before delivering to its end destination.

We are not in a position to supply you with filament. If we are successful at raising more money for this program, then we might be able to give you a new reel when you drop off 20 face shield sets.

== 3D Print Directions ==

=== Materials ===

'''PETG filament Sources'''

These face shields are best done with PETG filament. A 1kg spool can make about 20 units.

* [http://matterhackers.com Matter Hackers]
** 3mm product id # MF3CF7NH 1kg about $25
** 1.75mm product id # M3MY2VQG 1kg about $24 (only $20 each if you buy 5)
** 1.75mm product id # MTVEPT25 10 pounds (4.5kg) about $185 It is a higher quality PETG filament, but is it really worth the extra cost?

'''PETG Sheet Sources'''

One 48x96 inch sheet can make about 24 shields.

* [http://www.piedmontplastics.com Piedmont Plastics] in San Leandro, CA. .020x48x96 CLR VIVAK PETG JFM about $16/sheet.

=== Instructions ===

'''Printer Settings'''

Print with PETG for ease of sanitation - IPA, Hydrogen Peroxide, Bleach, and Acetic Acid up to 10% can all be safely used with PETG.

Print settings:
* Temperature based on filament selection.
* 3 perimeters
* 100% infill
* 0.3mm Draft settings in PrusaSlicer work fine
* we are running our Prusa's at 130% speed

=== Parts ===
We are focusing production on the Prusa RC2 headband with some modification to reduce weight and center the mounting pins, based on feedback from medical professionals.
If your printer is large enough to print this design, PLEASE switch production to that. If your printer cannot accommodate that, RC1 pieces are still helpful. See below for details on each.

==== RC2 + MakerNexus extensions (PREFERRED) ====

The MakerNexus modifications [https://github.com/hzeller/prusa-covid19-shield-remix are on github].
Easiest is to download the release at https://github.com/hzeller/prusa-covid19-shield-remix/releases (latest is v1.3 from 2020-03-28 noon)

This archive contains (next to the source files) the following files used used to print, which you also can download here:

* '''Ready-to-go''': [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.3/normal_shield_0.3mm_PETG_MK3S.gcode normal_shield_0.3mm_PETG_MK3S.gcode] '''GCode''' for MK3S printer for PETG 0.3mm, 3 shells, 100% infill; printing two headbands. This places two headbands and two bottom supports on the bed. You can use this directly in your Prusa MK3/MK3S printer. Using print-speed of 130% on the Prusa seems to work fine.
* '''modify print parameters''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.3/normal_shield.3mf normal_shield.3mf] '''3MF''' file to load in slicer. Places two headbands with bottom braces on the bed, lets arrange yourself and change printing parameters. Contains support-material setup.
* '''slice yourself''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.3/normal_shield_with_support.stl normal_shield_with_support.stl] The '''STL''' file. It already contains integrated supports for the pins, no support needs to be enabled in your slicer. If the built-in supports look like they are 'hovering', enable 'thin wall detection' in your slicer. The file named normal_shield_no_support.stl does not have supports if you want to use your slicer to do support.

==== Other Versions ====

Instead of Prusa RC2 or RC3, please use the version above, as it contains changes we got as feedback from
our local healthcare community.

We're working on a stacked version that prints reliably, but if you want/need to print stacked, as an
exception to the above, you can use the Prusa pre-arranged to print 3 at one time.
* [[:media:COVID19 SHIELD R1 3x.stl|Prusa RC1 (x3)]] STL File
For other arrangements, here's the [https://www.prusaprinters.org/prints/25857-protective-face-shield-rc1 original Prusa design page].

== Laser Cut Parts ==

* [[:media:Wrapover-faceshield-laser.svg|The SVG file for laser cutting the shield part]] SVG File

The shields are cut from 0.020 inch thick PETG sheets. Our base design fits into sheets of 24"x32". If we get donations of larger sheets, then we cut it down before using it.

== Elastic Band ==

Each shield uses approximately 8 inches of button hole elastic, 3/4 inch wide.

Sources
* [https://www.homesew.com/ Home Sew]

== Assembly and Disassembly ==

'''Assembly'''

Assembly requires about 8" of 3/4 wide button hole elastic.

* A short video on [https://youtu.be/qKqDUExM4Q8 how to assemble the Maker Nexus face shield version RC2]

* The original design [https://www.prusaprinters.org/prints/25857-prusa-protective-face-shield-rc2 Prusa RC2 STL- On this page]

Each box of face shields contains a QR Code that links to [[Covid-19 Shield User Instructions]]

'''Disassembly for cleaning'''

These face shields can be taken apart for cleaning.

The sheets are made of PETG and can handle alcohol and UV. The head band and spreader could be made of PETG, ABS, or PLA. These all resist alcohol but are heat sensitive. We are not experts in how to sanitize equipment. You, as user, take responsibility for appropriate sanitization. See [https://help.prusa3d.com/en/article/prusa-face-shield-disinfection_125457#_ga=2.91675610.133084680.1585293016-139199844.1585293016 this page from Prusa Research] for information on sanitization methods currently being tested.

A short video on [https://www.youtube.com/watch?v=F7FFPzGeRME how to take the Maker Nexus face shield apart]

== Help at MN ==
At this time we do not need volunteers in the makerspace itself. The space is on lockdown so that we do not introduce the virus into our work area.

'''Donations Needed'''

* PETG filament is useful - if you aren't able to print yourself. Any color in both 1.75mm and 3mm diameter filament. It should be in a factory sealed box or in a bag with desiccant.
* 3/4"-1" button hole elastic
* 0.020" thick PETG film for disposable masks, sheets or rolls

You can drop-off the donations at Maker Nexus, just leave it in the box by the front door of Maker Nexus. Please use appropriate procedures when packaging - including wearing a new pair of gloves and a face mask if available.

You can also donate via PayPal towards COVID-19 efforts that Maker Nexus is working on. [http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Who to contact'''

MN members join the #covid-faceshield channel on [https://www.makernexus.com/member-dashboard Slack]

If you don't have access to Slack, please email [mailto:faceshields@makernexus.org faceshields@makernexus.org]

== External Links ==

=== Information & Discussions ===
- [https://join.slack.com/t/prusafaceshields/shared_invite/zt-cz809azp-f41jGEYZivRKWH6IcYEmKw External slack for Prusa Shield discussions]

== Status ==
As of 3/29/2020

* We have 15 3D printers at Maker Nexus and 205 printers at homes through out the community.

* We have enough 0.020/0.030 PETg sheets to make about 4000 more shields. This is hard to buy now and we are testing alternatives.

* We have enough filament to keep our printers running and are buying more. Our preferred filament is now on back order and we are sourcing directly from China.

* We are exploring injection molding for the head bands. This may take some time.

* We have shipped over 650 face shields. Yea! That is what it's all about.

3D printed face shields

2020-03-29T20:38:59Z

Hzeller: /* RC2 + MakerNexus extensions (PREFERRED) */

[[File:Face shield front.jpg|200px]] [[File:Face shield side.jpg|350px]] [[File:Face shield top.jpg|350px]]

== Overview ==
Face shields are used by health care professionals to protect them when working with patients. Hospital supplies are running low. While they prefer to use commercially manufactured ones, in this emergency they are looking for alternative sources.

The headband portion of these shields is made on a 3D printer. If you have a 3D printer, you can make these. We have several at Maker Nexus that will be running as long as we have supplies. We deliver them to local hospitals.

* [https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform Sign up to use your own 3D printer] to help
* [https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform Sign up to receive face shields] for your health care facility

'''In the News'''

* A TV segment [https://sanfrancisco.cbslocal.com/video/4495791-maker-community-uses-3-d-printer-to-supply-ppe-to-health-professionals/ from KPIX]
* Watch a short [https://www.ktvu.com/news/covid-19-sunnyvale-company-designing-3d-protective-masks-to-meet-demand KTVU news report about our efforts.]

'''How much do they cost?'''

We give these away, paying for them from donations. We do not sell them. Promises of donations or actual donations do not affect who is prioritized to receive the PPE. The allocation team is not told who has donated. However, they cost us about $5 each to make. Donations are critical for us to be able to keep producing. We will make them until the money runs out.

[http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Is there really a need?'''

* We've heard from friends that "nurses are cutting up plastic soda bottles to make face shields, using saran wrap on top of N95 masks to allow for multi-use."
* One local nurse said they are making face shields from cut up shower curtains and hot glue guns.
* In reviewing the current design: "The nurses were over the moon about how easily the shields can be disassembled and sterilized."
* A nurse from Marin called us and I got her hooked into the allocation process and told her they were free. She started crying on the phone. - JimS

We are ramping up to make 1,000 a week, maybe more.

'''How do I get some?'''

If your health care facility needs face shields, fill in this form:

[https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform?usp=sf_link My Facility Needs Face Shields] (click the link)

A link to [[MN COVID Response|Other COVID Projects]]

== 3D Print Parts At Home ==

=== Use Your 3D Printer for good ===

'''Sign up'''

We are establishing a network of 3D printer owners who can make the headbands for us. You make them and deliver them to our facility where we do the assembly and get them to the hospitals. If you want to be part of our network, fill in this form and we will contact you:

[https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform I want to help make them]

'''Report your progress'''

If you've signed-up and started printing already:
[https://docs.google.com/spreadsheets/d/1Aoq7a0YbkPbGiMZGSxBgo0ySlgDWZHoaCvXc8sx9FU8/edit Keep us updated with your print progress].
Please request permission to access the file if you're prompted to, and we'll respond as quickly as we can.

=== What to do with the finished product ===
When you have parts ready to deliver, please follow the following steps:
# Fill out [https://docs.google.com/forms/d/e/1FAIpQLSdJfZz5M-xxQifJmFBdNQcn7c3i5eFabV7StA5ep9zsJuco9Q/viewform?usp=sf_link this form] with information about your donation (so we can track inventory)
# Seal in plastic bag.
# Label bag with your email, the version of face shield you printed, the material printed with (Currently RC2v1 is the most up to date part) and the date you closed the bag.
# Mail to
Maker Nexus
234 E. Carribean Drive
Sunnyvale, CA 94089
OR
Deliver to us if you are local and it does not violate the Shelter In Place Order - please do not make a special trip for this - but if you are passing by on your way to get essential groceries and want to drop it off, that is acceptable - there is a box outside our front door where donated parts can be placed.

Please be sure you are following proper sanitation procedures when you bag parts - if possible, wear gloves and a breathing mask, wipe or spray with disinfectant if available. We want to minimize the chance of cross-contamination. After it reaches MN, we will be further disinfecting them before delivering to its end destination.

We are not in a position to supply you with filament. If we are successful at raising more money for this program, then we might be able to give you a new reel when you drop off 20 face shield sets.

== 3D Print Directions ==

=== Materials ===

'''PETG filament Sources'''

These face shields are best done with PETG filament. A 1kg spool can make about 20 units.

* [http://matterhackers.com Matter Hackers]
** 3mm product id # MF3CF7NH 1kg about $25
** 1.75mm product id # M3MY2VQG 1kg about $24 (only $20 each if you buy 5)
** 1.75mm product id # MTVEPT25 10 pounds (4.5kg) about $185 It is a higher quality PETG filament, but is it really worth the extra cost?

'''PETG Sheet Sources'''

One 48x96 inch sheet can make about 24 shields.

* [http://www.piedmontplastics.com Piedmont Plastics] in San Leandro, CA. .020x48x96 CLR VIVAK PETG JFM about $16/sheet.

=== Instructions ===

'''Printer Settings'''

Print with PETG for ease of sanitation - IPA, Hydrogen Peroxide, Bleach, and Acetic Acid up to 10% can all be safely used with PETG.

Print settings:
* Temperature based on filament selection.
* 3 perimeters
* 100% infill
* 0.3mm Draft settings in PrusaSlicer work fine
* we are running our Prusa's at 130% speed

=== Parts ===
We are focusing production on the Prusa RC2 headband with some modification to reduce weight and center the mounting pins, based on feedback from medical professionals.
If your printer is large enough to print this design, PLEASE switch production to that. If your printer cannot accommodate that, RC1 pieces are still helpful. See below for details on each.

==== RC2 + MakerNexus extensions (PREFERRED) ====

The MakerNexus modifications [https://github.com/hzeller/prusa-covid19-shield-remix are on github].
Easiest is to download the release at https://github.com/hzeller/prusa-covid19-shield-remix/releases (latest is v1.3 from 2020-03-28 noon)

This archive contains (next to the source files) the following files used used to print, which you also can download here:

* '''Ready-to-go''': [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.3/normal_shield_0.3mm_PETG_MK3S.gcode normal_shield_0.3mm_PETG_MK3S.gcode] '''GCode''' for MK3S printer for PETG 0.3mm, 3 shells, 100% infill; printing two headbands. This places two headbands and two bottom supports on the bed. You can use this directly in your Prusa MK3/MK3S printer. Using print-speed of 130% on the Prusa seems to work fine.
* '''modify print parameters''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.3/normal_shield.3mf normal_shield.3mf] '''3MF''' file to load in slicer. Places two headbands with bottom braces on the bed, lets arrange yourself and change printing parameters. Contains support-material setup.
* '''slice yourself''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.3/normal_shield_with_support.stl normal_shield_with_support.stl] The '''STL''' file. It already contains integrated supports for the pins, no support needs to be enabled in your slicer. If the built-in supports look like they are 'hovering', enable 'thin wall detection' in your slicer. The file named normal_shield_no_support.stl does not have supports if you want to use your slicer to do support.

==== Other Versions ====

Instead of Prusa RC2 or RC3, please use the version above, as it contains changes we got as feedback from
our local healthcare community.

We're working on a stacked version that prints reliably, but if you want/need to print stacked, as an
exception to the above, you can use the Prusa pre-arranged to print 3 at one time.
* [[:media:COVID19 SHIELD R1 3x.stl|Prusa RC1 (x3)]] STL File
For other arrangements, here's the [https://www.prusaprinters.org/prints/25857-protective-face-shield-rc1 original Prusa design page].

== Laser Cut Parts ==

* [[:media:Wrapover-faceshield-laser.svg|The SVG file for laser cutting the shield part]] SVG File

The shields are cut from 0.020 inch thick PETG sheets. Our base design fits into sheets of 24"x32". If we get donations of larger sheets, then we cut it down before using it.

== Elastic Band ==

Each shield uses approximately 8 inches of button hole elastic, 3/4 inch wide.

Sources
* [https://www.homesew.com/ Home Sew]

== Assembly and Disassembly ==

'''Assembly'''

Assembly requires about 8" of 3/4 wide button hole elastic.

* A short video on [https://youtu.be/qKqDUExM4Q8 how to assemble the Maker Nexus face shield version RC2]

* The original design [https://www.prusaprinters.org/prints/25857-prusa-protective-face-shield-rc2 Prusa RC2 STL- On this page]

Each box of face shields contains a QR Code that links to [[Covid-19 Shield User Instructions]]

'''Disassembly for cleaning'''

These face shields can be taken apart for cleaning.

The sheets are made of PETG and can handle alcohol and UV. The head band and spreader could be made of PETG, ABS, or PLA. These all resist alcohol but are heat sensitive. We are not experts in how to sanitize equipment. You, as user, take responsibility for appropriate sanitization. See [https://help.prusa3d.com/en/article/prusa-face-shield-disinfection_125457#_ga=2.91675610.133084680.1585293016-139199844.1585293016 this page from Prusa Research] for information on sanitization methods currently being tested.

A short video on [https://www.youtube.com/watch?v=F7FFPzGeRME how to take the Maker Nexus face shield apart]

== Help at MN ==
At this time we do not need volunteers in the makerspace itself. The space is on lockdown so that we do not introduce the virus into our work area.

'''Donations Needed'''

* PETG filament is useful - if you aren't able to print yourself. Any color in both 1.75mm and 3mm diameter filament. It should be in a factory sealed box or in a bag with desiccant.
* 3/4"-1" button hole elastic
* 0.020" thick PETG film for disposable masks, sheets or rolls

You can drop-off the donations at Maker Nexus, just leave it in the box by the front door of Maker Nexus. Please use appropriate procedures when packaging - including wearing a new pair of gloves and a face mask if available.

You can also donate via PayPal towards COVID-19 efforts that Maker Nexus is working on. [http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Who to contact'''

MN members join the #covid-faceshield channel on [https://www.makernexus.com/member-dashboard Slack]

If you don't have access to Slack, please email [mailto:faceshields@makernexus.org faceshields@makernexus.org]

== External Links ==

=== Information & Discussions ===
- [https://join.slack.com/t/prusafaceshields/shared_invite/zt-cz809azp-f41jGEYZivRKWH6IcYEmKw External slack for Prusa Shield discussions]

== Status ==
As of 3/29/2020

* We have 15 3D printers at Maker Nexus and 205 printers at homes through out the community.

* We have enough 0.020/0.030 PETg sheets to make about 4000 more shields. This is hard to buy now and we are testing alternatives.

* We have enough filament to keep our printers running and are buying more. Our preferred filament is now on back order and we are sourcing directly from China.

* We are exploring injection molding for the head bands. This may take some time.

* We have shipped over 650 face shields. Yea! That is what it's all about.

3D printed face shields

2020-03-29T20:35:49Z

Hzeller: /* Older Versions */

[[File:Face shield front.jpg|200px]] [[File:Face shield side.jpg|350px]] [[File:Face shield top.jpg|350px]]

== Overview ==
Face shields are used by health care professionals to protect them when working with patients. Hospital supplies are running low. While they prefer to use commercially manufactured ones, in this emergency they are looking for alternative sources.

The headband portion of these shields is made on a 3D printer. If you have a 3D printer, you can make these. We have several at Maker Nexus that will be running as long as we have supplies. We deliver them to local hospitals.

* [https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform Sign up to use your own 3D printer] to help
* [https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform Sign up to receive face shields] for your health care facility

'''In the News'''

* A TV segment [https://sanfrancisco.cbslocal.com/video/4495791-maker-community-uses-3-d-printer-to-supply-ppe-to-health-professionals/ from KPIX]
* Watch a short [https://www.ktvu.com/news/covid-19-sunnyvale-company-designing-3d-protective-masks-to-meet-demand KTVU news report about our efforts.]

'''How much do they cost?'''

We give these away, paying for them from donations. We do not sell them. Promises of donations or actual donations do not affect who is prioritized to receive the PPE. The allocation team is not told who has donated. However, they cost us about $5 each to make. Donations are critical for us to be able to keep producing. We will make them until the money runs out.

[http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Is there really a need?'''

* We've heard from friends that "nurses are cutting up plastic soda bottles to make face shields, using saran wrap on top of N95 masks to allow for multi-use."
* One local nurse said they are making face shields from cut up shower curtains and hot glue guns.
* In reviewing the current design: "The nurses were over the moon about how easily the shields can be disassembled and sterilized."
* A nurse from Marin called us and I got her hooked into the allocation process and told her they were free. She started crying on the phone. - JimS

We are ramping up to make 1,000 a week, maybe more.

'''How do I get some?'''

If your health care facility needs face shields, fill in this form:

[https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform?usp=sf_link My Facility Needs Face Shields] (click the link)

A link to [[MN COVID Response|Other COVID Projects]]

== 3D Print Parts At Home ==

=== Use Your 3D Printer for good ===

'''Sign up'''

We are establishing a network of 3D printer owners who can make the headbands for us. You make them and deliver them to our facility where we do the assembly and get them to the hospitals. If you want to be part of our network, fill in this form and we will contact you:

[https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform I want to help make them]

'''Report your progress'''

If you've signed-up and started printing already:
[https://docs.google.com/spreadsheets/d/1Aoq7a0YbkPbGiMZGSxBgo0ySlgDWZHoaCvXc8sx9FU8/edit Keep us updated with your print progress].
Please request permission to access the file if you're prompted to, and we'll respond as quickly as we can.

=== What to do with the finished product ===
When you have parts ready to deliver, please follow the following steps:
# Fill out [https://docs.google.com/forms/d/e/1FAIpQLSdJfZz5M-xxQifJmFBdNQcn7c3i5eFabV7StA5ep9zsJuco9Q/viewform?usp=sf_link this form] with information about your donation (so we can track inventory)
# Seal in plastic bag.
# Label bag with your email, the version of face shield you printed, the material printed with (Currently RC2v1 is the most up to date part) and the date you closed the bag.
# Mail to
Maker Nexus
234 E. Carribean Drive
Sunnyvale, CA 94089
OR
Deliver to us if you are local and it does not violate the Shelter In Place Order - please do not make a special trip for this - but if you are passing by on your way to get essential groceries and want to drop it off, that is acceptable - there is a box outside our front door where donated parts can be placed.

Please be sure you are following proper sanitation procedures when you bag parts - if possible, wear gloves and a breathing mask, wipe or spray with disinfectant if available. We want to minimize the chance of cross-contamination. After it reaches MN, we will be further disinfecting them before delivering to its end destination.

We are not in a position to supply you with filament. If we are successful at raising more money for this program, then we might be able to give you a new reel when you drop off 20 face shield sets.

== 3D Print Directions ==

=== Materials ===

'''PETG filament Sources'''

These face shields are best done with PETG filament. A 1kg spool can make about 20 units.

* [http://matterhackers.com Matter Hackers]
** 3mm product id # MF3CF7NH 1kg about $25
** 1.75mm product id # M3MY2VQG 1kg about $24 (only $20 each if you buy 5)
** 1.75mm product id # MTVEPT25 10 pounds (4.5kg) about $185 It is a higher quality PETG filament, but is it really worth the extra cost?

'''PETG Sheet Sources'''

One 48x96 inch sheet can make about 24 shields.

* [http://www.piedmontplastics.com Piedmont Plastics] in San Leandro, CA. .020x48x96 CLR VIVAK PETG JFM about $16/sheet.

=== Instructions ===

'''Printer Settings'''

Print with PETG for ease of sanitation - IPA, Hydrogen Peroxide, Bleach, and Acetic Acid up to 10% can all be safely used with PETG.

Print settings:
* Temperature based on filament selection.
* 3 perimeters
* 100% infill
* 0.3mm Draft settings in PrusaSlicer work fine
* we are running our Prusa's at 130% speed

=== Parts ===
We are focusing production on the Prusa RC2 headband with some modification to reduce weight and center the mounting pins, based on feedback from medical professionals.
If your printer is large enough to print this design, PLEASE switch production to that. If your printer cannot accommodate that, RC1 pieces are still helpful. See below for details on each.

==== RC2 + MakerNexus extensions (PREFERRED) ====

The MakerNexus modifications [https://github.com/hzeller/prusa-covid19-shield-remix are on github].
Easiest is to download the release at https://github.com/hzeller/prusa-covid19-shield-remix/releases (latest is v1.3 from 2020-03-28 noon)

This archive contains (next to the source files) the following files used used to print, which you also can download here:

* '''Ready-to-go''': [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.3/normal_shield_0.3mm_PETG_MK3S.gcode normal_shield_0.3mm_PETG_MK3S.gcode] '''GCode''' for MK3S printer for PETG 0.3mm, 3 shells, 100% infill; printing two headbands. You can use this directly in your Prusa MK3/MK3S printer. Using print-speed of 130% on the Prusa seems to work fine.
* '''modify print parameters''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.3/normal_shield.3mf normal_shield.3mf] '''3MF''' file to load in slicer. Contains support-material setup. It works in a [https://www.prusa3d.com/prusaslicer/ prusa-slicer] (I use version 2.2.0), and should also work in other slicers.
* '''slice yourself''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.3/normal_shield_with_support.stl normal_shield_with_support.stl] The '''STL''' file. It already contains integrated supports for the pins, no support needs to be enabled in your slicer. If the built-in supports look like they are 'hovering', enable 'thin wall detection' in your slicer. The file named normal_shield_no_support.stl does not have supports if you want to use your slicer to do support.
* There are also short_shield versions of the above: they don't have hex-holes and are a little less thick for faster print-time (don't use yet, currently in testing).

==== Other Versions ====

Instead of Prusa RC2 or RC3, please use the version above, as it contains changes we got as feedback from
our local healthcare community.

We're working on a stacked version that prints reliably, but if you want/need to print stacked, as an
exception to the above, you can use the Prusa pre-arranged to print 3 at one time.
* [[:media:COVID19 SHIELD R1 3x.stl|Prusa RC1 (x3)]] STL File
For other arrangements, here's the [https://www.prusaprinters.org/prints/25857-protective-face-shield-rc1 original Prusa design page].

== Laser Cut Parts ==

* [[:media:Wrapover-faceshield-laser.svg|The SVG file for laser cutting the shield part]] SVG File

The shields are cut from 0.020 inch thick PETG sheets. Our base design fits into sheets of 24"x32". If we get donations of larger sheets, then we cut it down before using it.

== Elastic Band ==

Each shield uses approximately 8 inches of button hole elastic, 3/4 inch wide.

Sources
* [https://www.homesew.com/ Home Sew]

== Assembly and Disassembly ==

'''Assembly'''

Assembly requires about 8" of 3/4 wide button hole elastic.

* A short video on [https://youtu.be/qKqDUExM4Q8 how to assemble the Maker Nexus face shield version RC2]

* The original design [https://www.prusaprinters.org/prints/25857-prusa-protective-face-shield-rc2 Prusa RC2 STL- On this page]

Each box of face shields contains a QR Code that links to [[Covid-19 Shield User Instructions]]

'''Disassembly for cleaning'''

These face shields can be taken apart for cleaning.

The sheets are made of PETG and can handle alcohol and UV. The head band and spreader could be made of PETG, ABS, or PLA. These all resist alcohol but are heat sensitive. We are not experts in how to sanitize equipment. You, as user, take responsibility for appropriate sanitization. See [https://help.prusa3d.com/en/article/prusa-face-shield-disinfection_125457#_ga=2.91675610.133084680.1585293016-139199844.1585293016 this page from Prusa Research] for information on sanitization methods currently being tested.

A short video on [https://www.youtube.com/watch?v=F7FFPzGeRME how to take the Maker Nexus face shield apart]

== Help at MN ==
At this time we do not need volunteers in the makerspace itself. The space is on lockdown so that we do not introduce the virus into our work area.

'''Donations Needed'''

* PETG filament is useful - if you aren't able to print yourself. Any color in both 1.75mm and 3mm diameter filament. It should be in a factory sealed box or in a bag with desiccant.
* 3/4"-1" button hole elastic
* 0.020" thick PETG film for disposable masks, sheets or rolls

You can drop-off the donations at Maker Nexus, just leave it in the box by the front door of Maker Nexus. Please use appropriate procedures when packaging - including wearing a new pair of gloves and a face mask if available.

You can also donate via PayPal towards COVID-19 efforts that Maker Nexus is working on. [http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Who to contact'''

MN members join the #covid-faceshield channel on [https://www.makernexus.com/member-dashboard Slack]

If you don't have access to Slack, please email [mailto:faceshields@makernexus.org faceshields@makernexus.org]

== External Links ==

=== Information & Discussions ===
- [https://join.slack.com/t/prusafaceshields/shared_invite/zt-cz809azp-f41jGEYZivRKWH6IcYEmKw External slack for Prusa Shield discussions]

== Status ==
As of 3/29/2020

* We have 15 3D printers at Maker Nexus and 205 printers at homes through out the community.

* We have enough 0.020/0.030 PETg sheets to make about 4000 more shields. This is hard to buy now and we are testing alternatives.

* We have enough filament to keep our printers running and are buying more. Our preferred filament is now on back order and we are sourcing directly from China.

* We are exploring injection molding for the head bands. This may take some time.

* We have shipped over 650 face shields. Yea! That is what it's all about.

3D printed face shields

2020-03-29T19:58:56Z

Hzeller: /* RC2 + MakerNexus extensions (PREFERRED) */

[[File:Face shield front.jpg|200px]] [[File:Face shield side.jpg|350px]] [[File:Face shield top.jpg|350px]]

== Overview ==
Face shields are used by health care professionals to protect them when working with patients. Hospital supplies are running low. While they prefer to use commercially manufactured ones, in this emergency they are looking for alternative sources.

The headband portion of these shields is made on a 3D printer. If you have a 3D printer, you can make these. We have several at Maker Nexus that will be running as long as we have supplies. We deliver them to local hospitals.

* [https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform Sign up to use your own 3D printer] to help
* [https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform Sign up to receive face shields] for your health care facility

'''In the News'''

* A TV segment [https://sanfrancisco.cbslocal.com/video/4495791-maker-community-uses-3-d-printer-to-supply-ppe-to-health-professionals/ from KPIX]
* Watch a short [https://www.ktvu.com/news/covid-19-sunnyvale-company-designing-3d-protective-masks-to-meet-demand KTVU news report about our efforts.]

'''How much do they cost?'''

We give these away, paying for them from donations. We do not sell them. Promises of donations or actual donations do not affect who is prioritized to receive the PPE. The allocation team is not told who has donated. However, they cost us about $5 each to make. Donations are critical for us to be able to keep producing. We will make them until the money runs out.

[http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Is there really a need?'''

* We've heard from friends that "nurses are cutting up plastic soda bottles to make face shields, using saran wrap on top of N95 masks to allow for multi-use."
* One local nurse said they are making face shields from cut up shower curtains and hot glue guns.
* In reviewing the current design: "The nurses were over the moon about how easily the shields can be disassembled and sterilized."
* A nurse from Marin called us and I got her hooked into the allocation process and told her they were free. She started crying on the phone. - JimS

We are ramping up to make 1,000 a week, maybe more.

'''How do I get some?'''

If your health care facility needs face shields, fill in this form:

[https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform?usp=sf_link My Facility Needs Face Shields] (click the link)

A link to [[MN COVID Response|Other COVID Projects]]

== 3D Print Parts At Home ==

=== Use Your 3D Printer for good ===

'''Sign up'''

We are establishing a network of 3D printer owners who can make the headbands for us. You make them and deliver them to our facility where we do the assembly and get them to the hospitals. If you want to be part of our network, fill in this form and we will contact you:

[https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform I want to help make them]

'''Report your progress'''

If you've signed-up and started printing already:
[https://docs.google.com/spreadsheets/d/1Aoq7a0YbkPbGiMZGSxBgo0ySlgDWZHoaCvXc8sx9FU8/edit Keep us updated with your print progress].
Please request permission to access the file if you're prompted to, and we'll respond as quickly as we can.

=== What to do with the finished product ===
When you have parts ready to deliver, please follow the following steps:
# Fill out [https://docs.google.com/forms/d/e/1FAIpQLSdJfZz5M-xxQifJmFBdNQcn7c3i5eFabV7StA5ep9zsJuco9Q/viewform?usp=sf_link this form] with information about your donation (so we can track inventory)
# Seal in plastic bag.
# Label bag with your email, the version of face shield you printed, the material printed with (Currently RC2v1 is the most up to date part) and the date you closed the bag.
# Mail to
Maker Nexus
234 E. Carribean Drive
Sunnyvale, CA 94089
OR
Deliver to us if you are local and it does not violate the Shelter In Place Order - please do not make a special trip for this - but if you are passing by on your way to get essential groceries and want to drop it off, that is acceptable - there is a box outside our front door where donated parts can be placed.

Please be sure you are following proper sanitation procedures when you bag parts - if possible, wear gloves and a breathing mask, wipe or spray with disinfectant if available. We want to minimize the chance of cross-contamination. After it reaches MN, we will be further disinfecting them before delivering to its end destination.

We are not in a position to supply you with filament. If we are successful at raising more money for this program, then we might be able to give you a new reel when you drop off 20 face shield sets.

== 3D Print Directions ==

=== Materials ===

'''PETG filament Sources'''

These face shields are best done with PETG filament. A 1kg spool can make about 20 units.

* [http://matterhackers.com Matter Hackers]
** 3mm product id # MF3CF7NH 1kg about $25
** 1.75mm product id # M3MY2VQG 1kg about $24 (only $20 each if you buy 5)
** 1.75mm product id # MTVEPT25 10 pounds (4.5kg) about $185 It is a higher quality PETG filament, but is it really worth the extra cost?

'''PETG Sheet Sources'''

One 48x96 inch sheet can make about 24 shields.

* [http://www.piedmontplastics.com Piedmont Plastics] in San Leandro, CA. .020x48x96 CLR VIVAK PETG JFM about $16/sheet.

=== Instructions ===

'''Printer Settings'''

Print with PETG for ease of sanitation - IPA, Hydrogen Peroxide, Bleach, and Acetic Acid up to 10% can all be safely used with PETG.

Print settings:
* Temperature based on filament selection.
* 3 perimeters
* 100% infill
* 0.3mm Draft settings in PrusaSlicer work fine
* we are running our Prusa's at 130% speed

=== Parts ===
We are focusing production on the Prusa RC2 headband with some modification to reduce weight and center the mounting pins, based on feedback from medical professionals.
If your printer is large enough to print this design, PLEASE switch production to that. If your printer cannot accommodate that, RC1 pieces are still helpful. See below for details on each.

==== RC2 + MakerNexus extensions (PREFERRED) ====

The MakerNexus modifications [https://github.com/hzeller/prusa-covid19-shield-remix are on github].
Easiest is to download the release at https://github.com/hzeller/prusa-covid19-shield-remix/releases (latest is v1.3 from 2020-03-28 noon)

This archive contains (next to the source files) the following files used used to print, which you also can download here:

* '''Ready-to-go''': [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.3/normal_shield_0.3mm_PETG_MK3S.gcode normal_shield_0.3mm_PETG_MK3S.gcode] '''GCode''' for MK3S printer for PETG 0.3mm, 3 shells, 100% infill; printing two headbands. You can use this directly in your Prusa MK3/MK3S printer. Using print-speed of 130% on the Prusa seems to work fine.
* '''modify print parameters''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.3/normal_shield.3mf normal_shield.3mf] '''3MF''' file to load in slicer. Contains support-material setup. It works in a [https://www.prusa3d.com/prusaslicer/ prusa-slicer] (I use version 2.2.0), and should also work in other slicers.
* '''slice yourself''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.3/normal_shield_with_support.stl normal_shield_with_support.stl] The '''STL''' file. It already contains integrated supports for the pins, no support needs to be enabled in your slicer. If the built-in supports look like they are 'hovering', enable 'thin wall detection' in your slicer. The file named normal_shield_no_support.stl does not have supports if you want to use your slicer to do support.
* There are also short_shield versions of the above: they don't have hex-holes and are a little less thick for faster print-time (don't use yet, currently in testing).

==== Older Versions ====
''' RC2 : Prusa STL file'''

Pre-arranged to print 2 at one time.
* [[:media:covid19_headband_rc2_2x.stl|Prusa RC2 (x2)]] STL File
For other arrangements, here's the [https://www.prusaprinters.org/prints/25857-protective-face-shield-rc1 original Prusa design page].

'''G-codes'''

Direct gcode files for common printers (WIP):
* Prusa MK3S (Right click and select "Save link as". Then save as type ".gcode" -- instead of .txt -- before printing!):
** [[:media:CovidShield_RC2_2x_0.25mm_PETG_MK3S_6h17m.gcode.txt| RC2(x2) / PETG]]
** [[:media:CovidShield_RC2_2x_0.25mm_PLA_MK3S_5h56m.gcode.txt| RC2(x2) / PLA]]

''' RC1 : Older Prusa STL file'''

Pre-arranged to print 3 at one time.
* [[:media:COVID19 SHIELD R1 3x.stl|Prusa RC1 (x3)]] STL File
For other arrangements, here's the [https://www.prusaprinters.org/prints/25857-protective-face-shield-rc1 original Prusa design page].

== Laser Cut Parts ==

* [[:media:Wrapover-faceshield-laser.svg|The SVG file for laser cutting the shield part]] SVG File

The shields are cut from 0.020 inch thick PETG sheets. Our base design fits into sheets of 24"x32". If we get donations of larger sheets, then we cut it down before using it.

== Elastic Band ==

Each shield uses approximately 8 inches of button hole elastic, 3/4 inch wide.

Sources
* [https://www.homesew.com/ Home Sew]

== Assembly and Disassembly ==

'''Assembly'''

Assembly requires about 8" of 3/4 wide button hole elastic.

* A short video on [https://youtu.be/qKqDUExM4Q8 how to assemble the Maker Nexus face shield version RC2]

* The original design [https://www.prusaprinters.org/prints/25857-prusa-protective-face-shield-rc2 Prusa RC2 STL- On this page]

Each box of face shields contains a QR Code that links to [[Covid-19 Shield User Instructions]]

'''Disassembly for cleaning'''

These face shields can be taken apart for cleaning.

The sheets are made of PETG and can handle alcohol and UV. The head band and spreader could be made of PETG, ABS, or PLA. These all resist alcohol but are heat sensitive. We are not experts in how to sanitize equipment. You, as user, take responsibility for appropriate sanitization. See [https://help.prusa3d.com/en/article/prusa-face-shield-disinfection_125457#_ga=2.91675610.133084680.1585293016-139199844.1585293016 this page from Prusa Research] for information on sanitization methods currently being tested.

A short video on [https://www.youtube.com/watch?v=F7FFPzGeRME how to take the Maker Nexus face shield apart]

== Help at MN ==
At this time we do not need volunteers in the makerspace itself. The space is on lockdown so that we do not introduce the virus into our work area.

'''Donations Needed'''

* PETG filament is useful - if you aren't able to print yourself. Any color in both 1.75mm and 3mm diameter filament. It should be in a factory sealed box or in a bag with desiccant.
* 3/4"-1" button hole elastic
* 0.020" thick PETG film for disposable masks, sheets or rolls

You can drop-off the donations at Maker Nexus, just leave it in the box by the front door of Maker Nexus. Please use appropriate procedures when packaging - including wearing a new pair of gloves and a face mask if available.

You can also donate via PayPal towards COVID-19 efforts that Maker Nexus is working on. [http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

'''Who to contact'''

MN members join the #covid-faceshield channel on [https://www.makernexus.com/member-dashboard Slack]

If you don't have access to Slack, please email [mailto:faceshields@makernexus.org faceshields@makernexus.org]

== External Links ==

=== Information & Discussions ===
- [https://join.slack.com/t/prusafaceshields/shared_invite/zt-cz809azp-f41jGEYZivRKWH6IcYEmKw External slack for Prusa Shield discussions]

== Status ==
As of 3/29/2020

* We have 15 3D printers at Maker Nexus and 205 printers at homes through out the community.

* We have enough 0.020/0.030 PETg sheets to make about 4000 more shields. This is hard to buy now and we are testing alternatives.

* We have enough filament to keep our printers running and are buying more. Our preferred filament is now on back order and we are sourcing directly from China.

* We are exploring injection molding for the head bands. This may take some time.

* We have shipped over 650 face shields. Yea! That is what it's all about.

3D printed face shields

2020-03-28T19:35:17Z

Hzeller: Update version to 1.3

[[File:Face shield front.jpg|200px]] [[File:Face shield side.jpg|350px]] [[File:Face shield top.jpg|350px]]

== Overview ==
Face shields are used by health care professionals to protect them when working with patients. Hospital supplies are running low. While they prefer to use commercially manufactured ones, in this emergency they are looking for alternative sources.

The headband portion of these shields is made on a 3D printer. If you have a 3D printer, you can make these. We have several at Maker Nexus that will be running as long as we have supplies. We need volunteers come in to service the printing. We also need volunteers to assemble the final shields. We will deliver them to local hospitals.

* [https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform Sign up to use your own 3D printer] to help
* [https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform Sign up to receive face shields] for your health care facility

[[MN COVID Response|Other COVID Projects]]

Watch a short [https://www.ktvu.com/news/covid-19-sunnyvale-company-designing-3d-protective-masks-to-meet-demand KTVU news report about our efforts.]

[http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

== Is there really a need? ==
* We've heard from friends that "nurses are cutting up plastic soda bottles to make face shields, using saran wrap on top of N95 masks to allow for multi-use."
* One local nurse said they are making face shields from cut up shower curtains and hot glue guns.

In reviewing the current design: "The nurses were over the moon about how easily the shields can be disassembled and sterilized."

We are ramping up to make 1,000 a week, maybe more.

If your health care facility needs face shields, fill in this form:

[https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform?usp=sf_link My Facility Needs Face Shields] (click the link)

== 3D Print Parts At Home ==

=== Use Your 3D Printer for good ===

==== Sign up ====
We are establishing a network of 3D printer owners who can make the headbands for us. You make them and deliver them to our facility where we do the assembly and get them to the hospitals. If you want to be part of our network, fill in this form and we will contact you:

[https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform I want to help make them]

==== Report your progress ====
If you've signed-up and started printing already:
[https://docs.google.com/spreadsheets/d/1Aoq7a0YbkPbGiMZGSxBgo0ySlgDWZHoaCvXc8sx9FU8/edit Keep us updated with your print progress].
Please request permission to access the file if you're prompted to, and we'll respond as quickly as we can.

=== What to do with the finished product ===
When you have parts ready to deliver, please follow the following steps:
# Fill out [https://docs.google.com/forms/d/e/1FAIpQLSdJfZz5M-xxQifJmFBdNQcn7c3i5eFabV7StA5ep9zsJuco9Q/viewform?usp=sf_link this form] with information about your donation (so we can track inventory)
# Seal in plastic bag.
# Label bag with your email, the version of face shield you printed, the material printed with (Currently RC2v1 is the most up to date part) and the date you closed the bag.
# Mail to
Maker Nexus
234 E. Carribean Drive
Sunnyvale, CA 94089
OR
Deliver to us if you are local and it does not violate the Shelter In Place Order - please do not make a special trip for this - but if you are passing by on your way to get essential groceries and want to drop it off, that is acceptable - there is a box outside our front door where donated parts can be placed.

Please be sure you are following proper sanitation procedures when you bag parts - if possible, wear gloves and a breathing mask, wipe or spray with disinfectant if available. We want to minimize the chance of cross-contamination. After it reaches MN, we will be further disinfecting them before delivering to its end destination.

We are not in a position to supply you with filament. If we are successful at raising more money for this program, then we might be able to give you a new reel when you drop off 20 face shield sets.

== 3D Print Directions ==

=== Materials ===

==== PETG filament Sources ====

These face shields are best done with PETG filament. A 1kg spool can make about 20 units.

* [http://matterhackers.com Matter Hackers]
** 3mm product id # MF3CF7NH 1kg about $25
** 1.75mm product id # M3MY2VQG 1kg about $24 (only $20 each if you buy 5)
** 1.75mm product id # MTVEPT25 10 pounds (4.5kg) about $185 It is a higher quality PETG filament, but is it really worth the extra cost?

==== PETG Sheet Sources ====

One 48x96 inch sheet can make about 24 shields.

* [http://www.piedmontplastics.com Piedmont Plastics] in San Leandro, CA. .020x48x96 CLR VIVAK PETG JFM about $16/sheet.

=== Instructions ===

==== Printer Settings ====

Print with PETG for ease of sanitation - IPA, Hydrogen Peroxide, Bleach, and Acetic Acid up to 10% can all be safely used with PETG.

Print settings:
* Temperature based on filament selection.
* 3 perimeters
* 100% infill
* 0.3mm Draft settings in PrusaSlicer work fine
* we are running our Prusa's at 130% speed

=== Parts ===
We are focusing production on the Prusa RC2 headband with some modification to reduce weight and center the mounting pins, based on feedback from medical professionals.
If your printer is large enough to print this design, PLEASE switch production to that. If your printer cannot accommodate that, RC1 pieces are still helpful. See below for details on each.

==== RC2 + MakerNexus extensions (PREFERRED) ====

The MakerNexus modifications [https://github.com/hzeller/prusa-covid19-shield-remix are on github].
Easiest is to download the release at https://github.com/hzeller/prusa-covid19-shield-remix/releases (latest is v1.3 from 2020-03-28 noon)

This archive contains (next to the source files) the following files used used to print, which you also can download here:

* '''Ready-to-go''': [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.3/normal_shield_0.3mm_PETG_MK3S.gcode normal_shield_0.3mm_PETG_MK3S.gcode] '''GCode''' for MK3S printer for PETG 0.3mm, 3 shells, 100% infill; printing two headbands. You can use this directly in your Prusa MK3/MK3S printer. Using print-speed of 130% on the Prusa seems to work fine.
* '''modify print parameters''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.3/normal_shield.3mf normal_shield.3mf] '''3MF''' file to load in slicer. Contains support-material setup. It works in a [https://www.prusa3d.com/prusaslicer/ prusa-slicer] (I use version 2.2.0), and should also work in other slicers.
* '''slice yourself''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.3/normal_shield_with_support.stl normal_shield_with_support.stl] The '''STL''' file. It already contains integrated supports for the pins (the file normal_shield_no_support.stl does not have supports if you want to do that in the slicer).
* There are also short_shield versions of the above: they don't have hex-holes and are a little less thick for faster print-time (don't use yet, currently in testing).

==== Older Versions ====
===== RC2 : Prusa STL file =====
Pre-arranged to print 2 at one time.
* [[:media:covid19_headband_rc2_2x.stl|Prusa RC2 (x2)]] STL File
For other arrangements, here's the [https://www.prusaprinters.org/prints/25857-protective-face-shield-rc1 original Prusa design page].

====== G-codes ======
Direct gcode files for common printers (WIP):
* Prusa MK3S (Right click and select "Save link as". Then save as type ".gcode" -- instead of .txt -- before printing!):
** [[:media:CovidShield_RC2_2x_0.25mm_PETG_MK3S_6h17m.gcode.txt| RC2(x2) / PETG]]
** [[:media:CovidShield_RC2_2x_0.25mm_PLA_MK3S_5h56m.gcode.txt| RC2(x2) / PLA]]

===== RC1 : Older Prusa STL file =====
Pre-arranged to print 3 at one time.
* [[:media:COVID19 SHIELD R1 3x.stl|Prusa RC1 (x3)]] STL File
For other arrangements, here's the [https://www.prusaprinters.org/prints/25857-protective-face-shield-rc1 original Prusa design page].

== Laser Cut Parts ==

* [[:media:Faceshield-laser.svg|The SVG file for laser cutting the shield part]] SVG File

The shields are cut from 0.020 inch thick PETG sheets. Our base design fits into sheets of 24"x32". If we get donations of larger sheets, then we cut it down before using it.

== Elastic Band ==

Each shield uses approximately 8 inches of button hole elastic, 3/4 inch wide.

Sources
* [https://www.homesew.com/ Home Sew]

== Assembly ==

Assembly requires about 8" of 3/4 wide button hole elastic.

* A short video on [https://youtu.be/qKqDUExM4Q8 how to assemble the Maker Nexus face shield version RC2]

* The original design [https://www.prusaprinters.org/prints/25857-prusa-protective-face-shield-rc2 Prusa RC2 STL- On this page]

== Disassembly for cleaning ==

These face shields can be taken apart for cleaning.

The sheets are made of PETG and can handle alcohol and UV. The head band and spreader could be made of PETG, ABS, or PLA. These all resist alcohol but are heat sensitive. We are not experts in how to sanitize equipment. You, as user, take responsibility for appropriate sanitization. See [https://help.prusa3d.com/en/article/prusa-face-shield-disinfection_125457#_ga=2.91675610.133084680.1585293016-139199844.1585293016 this page from Prusa Research] for information on sanitization methods currently being tested.

A short video on [https://www.youtube.com/watch?v=F7FFPzGeRME how to take the Maker Nexus face shield apart]

== Help at MN ==
At this time we do not need volunteers in the makerspace itself. The space is on lockdown so that we do not introduce the virus into our work area.

=== Donations Needed ===
* PETG filament is useful - if you aren't able to print yourself. Any color in both 1.75mm and 3mm diameter filament. It should be in a factory sealed box or in a bag with desiccant.
* 3/4"-1" button hole elastic
* 0.020" thick PETG film for disposable masks, sheets or rolls

You can drop-off the donations at Maker Nexus, just leave it in the box by the front door of Maker Nexus. Please use appropriate procedures when packaging - including wearing a new pair of gloves and a face mask if available.

You can also donate via PayPal towards COVID-19 efforts that Maker Nexus is working on. [http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

=== Who to contact ===
MN members join the #covid-faceshield channel on [https://www.makernexus.com/member-dashboard Slack]

If you don't have access to Slack, please email [mailto:faceshields@makernexus.org faceshields@makernexus.org]

== External Links ==

=== Information & Discussions ===
- [https://join.slack.com/t/prusafaceshields/shared_invite/zt-cz809azp-f41jGEYZivRKWH6IcYEmKw External slack for Prusa Shield discussions]

== Status ==
=== Capacity ===
* 5 Prusa 3D printers
** 1.75mm PETG
** each can make 8 shields a day
* 4 other type
** 3mm PETG
** each can make 3 a day
* 4 other type 2
** 3mm PETG
** each can make 3 a day
* Remote print capability
** What is our current capacity in the community? We are working that out now - so many people are volunteering!
* 3 Laser cutters
** The shields cut quickly and we are only limited by material sourcing
* Assembly is very quick, we can easily keep up

=== Supplies ===
As of 3/23/2020 1:15PM
* We have 1.75mm PETG reels to last through this week
* We are out of 3mm PETG and have more on order
* By the end of the day we will have enough PETG sheeting to make about 4,500 face shields
* We have 30 yards of button hole elastic, only enough for 135 face shields.

===Summary===
* If we have enough material we can make at least 65 face shields a day as of 3/23/2020.
* We currently have about 85 ready to be assembled (3/23/2020 1:15pm)
** We are waiting for final approval on the actual shield design from our health care provider partner.

3D printed face shields

2020-03-28T14:16:54Z

Hzeller: Include time of version number.

[[File:Face shield front.jpg|200px]] [[File:Face shield side.jpg|350px]] [[File:Face shield top.jpg|350px]]

== Overview ==
Face shields are used by health care professionals to protect them when working with patients. Hospital supplies are running low. While they prefer to use commercially manufactured ones, in this emergency they are looking for alternative sources.

The headband portion of these shields is made on a 3D printer. If you have a 3D printer, you can make these. We have several at Maker Nexus that will be running as long as we have supplies. We need volunteers come in to service the printing. We also need volunteers to assemble the final shields. We will deliver them to local hospitals.

* [https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform Sign up to use your own 3D printer] to help
* [https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform Sign up to receive face shields] for your health care facility

[[MN COVID Response|Other COVID Projects]]

Watch a short [https://www.ktvu.com/news/covid-19-sunnyvale-company-designing-3d-protective-masks-to-meet-demand KTVU news report about our efforts.]

[http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

== Is there really a need? ==
* We've heard from friends that "nurses are cutting up plastic soda bottles to make face shields, using saran wrap on top of N95 masks to allow for multi-use."
* One local nurse said they are making face shields from cut up shower curtains and hot glue guns.

In reviewing the current design: "The nurses were over the moon about how easily the shields can be disassembled and sterilized."

We are ramping up to make 1,000 a week, maybe more.

If your health care facility needs face shields, fill in this form:

[https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform?usp=sf_link My Facility Needs Face Shields] (click the link)

== 3D Print Parts At Home ==

=== Use Your 3D Printer for good ===

==== Sign up ====
We are establishing a network of 3D printer owners who can make the headbands for us. You make them and deliver them to our facility where we do the assembly and get them to the hospitals. If you want to be part of our network, fill in this form and we will contact you:

[https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform I want to help make them]

==== Report your progress ====
If you've signed-up and started printing already:
[https://docs.google.com/spreadsheets/d/1Aoq7a0YbkPbGiMZGSxBgo0ySlgDWZHoaCvXc8sx9FU8/edit Keep us updated with your print progress].
Please request permission to access the file if you're prompted to, and we'll respond as quickly as we can.

=== What to do with the finished product ===
When you have parts ready to deliver, please follow the following steps:
# Fill out [https://docs.google.com/forms/d/e/1FAIpQLSdJfZz5M-xxQifJmFBdNQcn7c3i5eFabV7StA5ep9zsJuco9Q/viewform?usp=sf_link this form] with information about your donation (so we can track inventory)
# Seal in plastic bag.
# Label bag with your email, the version of face shield you printed, the material printed with (Currently RC2v1 is the most up to date part) and the date you closed the bag.
# Mail to
Maker Nexus
234 E. Carribean Drive
Sunnyvale, CA 94089
OR
Deliver to us if you are local and it does not violate the Shelter In Place Order - please do not make a special trip for this - but if you are passing by on your way to get essential groceries and want to drop it off, that is acceptable - there is a box outside our front door where donated parts can be placed.

Please be sure you are following proper sanitation procedures when you bag parts - if possible, wear gloves and a breathing mask, wipe or spray with disinfectant if available. We want to minimize the chance of cross-contamination. After it reaches MN, we will be further disinfecting them before delivering to its end destination.

We are not in a position to supply you with filament. If we are successful at raising more money for this program, then we might be able to give you a new reel when you drop off 20 face shield sets.

== 3D Print Directions ==

=== Materials ===

==== PETG filament Sources ====

These face shields are best done with PETG filament. A 1kg spool can make about 20 units.

* [http://matterhackers.com Matter Hackers]
** 3mm product id # MF3CF7NH 1kg about $25
** 1.75mm product id # M3MY2VQG 1kg about $24 (only $20 each if you buy 5)
** 1.75mm product id # MTVEPT25 10 pounds (4.5kg) about $185 It is a higher quality PETG filament, but is it really worth the extra cost?

==== PETG Sheet Sources ====

One 48x96 inch sheet can make about 24 shields.

* [http://www.piedmontplastics.com Piedmont Plastics] in San Leandro, CA. .020x48x96 CLR VIVAK PETG JFM about $16/sheet.

=== Instructions ===

==== Printer Settings ====

Print with PETG for ease of sanitation - IPA, Hydrogen Peroxide, Bleach, and Acetic Acid up to 10% can all be safely used with PETG.

Print settings:
* Temperature based on filament selection.
* 3 perimeters
* 100% infill
* 0.3mm Draft settings in PrusaSlicer work fine
* we are running our Prusa's at 130% speed

=== Parts ===
We are focusing production on the Prusa RC2 headband with some modification to reduce weight and center the mounting pins, based on feedback from medical professionals.
If your printer is large enough to print this design, PLEASE switch production to that. If your printer cannot accommodate that, RC1 pieces are still helpful. See below for details on each.

==== RC2 + MakerNexus extensions (PREFERRED) ====

The MakerNexus modifications [https://github.com/hzeller/prusa-covid19-shield-remix are on github].
Easiest is to download the release at https://github.com/hzeller/prusa-covid19-shield-remix/releases (latest is v1.2 from 2020-03-28)

This archive contains (next to the source files) the following files used used to print, which you also can download here:

* '''Ready-to-go''': [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.2/normal_shield_0.3mm_PETG_MK3S.gcode normal_shield_0.3mm_PETG_MK3S.gcode] '''GCode''' for MK3S printer for PETG 0.3mm, 3 shells, 100% infill; printing two headbands. You can use this directly in your Prusa MK3/MK3S printer. Using print-speed of 130% on the Prusa seems to work fine.
* '''modify print parameters''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.2/normal_shield.3mf normal_shield.3mf] '''3MF''' file to load in slicer. Contains support-material setup. It works in a [https://www.prusa3d.com/prusaslicer/ prusa-slicer] (I use version 2.2.0), and should also work in other slicers.
* '''slice yourself''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.2/normal_shield_with_support.stl normal_shield_with_support.stl] The '''STL''' file. It already contains integrated supports for the pins (the file normal_shield_no_support.stl does not have supports if you want to do that in the slicer).
* There are also short_shield versions of the above: they don't have hex-holes and are a little less thick for faster print-time (don't use yet, currently in testing).

==== Older Versions ====
===== RC2 : Prusa STL file =====
Pre-arranged to print 2 at one time.
* [[:media:covid19_headband_rc2_2x.stl|Prusa RC2 (x2)]] STL File
For other arrangements, here's the [https://www.prusaprinters.org/prints/25857-protective-face-shield-rc1 original Prusa design page].

====== G-codes ======
Direct gcode files for common printers (WIP):
* Prusa MK3S (Right click and select "Save link as". Then save as type ".gcode" -- instead of .txt -- before printing!):
** [[:media:CovidShield_RC2_2x_0.25mm_PETG_MK3S_6h17m.gcode.txt| RC2(x2) / PETG]]
** [[:media:CovidShield_RC2_2x_0.25mm_PLA_MK3S_5h56m.gcode.txt| RC2(x2) / PLA]]

===== RC1 : Older Prusa STL file =====
Pre-arranged to print 3 at one time.
* [[:media:COVID19 SHIELD R1 3x.stl|Prusa RC1 (x3)]] STL File
For other arrangements, here's the [https://www.prusaprinters.org/prints/25857-protective-face-shield-rc1 original Prusa design page].

== Laser Cut Parts ==

* [[:media:Faceshield-laser.svg|The SVG file for laser cutting the shield part]] SVG File

The shields are cut from 0.020 inch thick PETG sheets. Our base design fits into sheets of 24"x32". If we get donations of larger sheets, then we cut it down before using it.

== Elastic Band ==

Each shield uses approximately 8 inches of button hole elastic, 3/4 inch wide.

Sources
* [https://www.homesew.com/ Home Sew]

== Assembly ==

Assembly requires about 8" of 3/4 wide button hole elastic.

* A short video on [https://youtu.be/qKqDUExM4Q8 how to assemble the Maker Nexus face shield version RC2]

* The original design [https://www.prusaprinters.org/prints/25857-prusa-protective-face-shield-rc2 Prusa RC2 STL- On this page]

== Disassembly for cleaning ==

These face shields can be taken apart for cleaning.

The sheets are made of PETG and can handle alcohol and UV. The head band and spreader could be made of PETG, ABS, or PLA. These all resist alcohol but are heat sensitive. We are not experts in how to sanitize equipment. You, as user, take responsibility for appropriate sanitization. See [https://help.prusa3d.com/en/article/prusa-face-shield-disinfection_125457#_ga=2.91675610.133084680.1585293016-139199844.1585293016 this page from Prusa Research] for information on sanitization methods currently being tested.

A short video on [https://www.youtube.com/watch?v=F7FFPzGeRME how to take the Maker Nexus face shield apart]

== Help at MN ==
At this time we do not need volunteers in the makerspace itself. The space is on lockdown so that we do not introduce the virus into our work area.

=== Donations Needed ===
* PETG filament is useful - if you aren't able to print yourself. Any color in both 1.75mm and 3mm diameter filament. It should be in a factory sealed box or in a bag with desiccant.
* 3/4"-1" button hole elastic
* 0.020" thick PETG film for disposable masks, sheets or rolls

You can drop-off the donations at Maker Nexus, just leave it in the box by the front door of Maker Nexus. Please use appropriate procedures when packaging - including wearing a new pair of gloves and a face mask if available.

You can also donate via PayPal towards COVID-19 efforts that Maker Nexus is working on. [http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

=== Who to contact ===
MN members join the #covid-faceshield channel on [https://www.makernexus.com/member-dashboard Slack]

If you don't have access to Slack, please email [mailto:faceshields@makernexus.org faceshields@makernexus.org]

== External Links ==

=== Information & Discussions ===
- [https://join.slack.com/t/prusafaceshields/shared_invite/zt-cz809azp-f41jGEYZivRKWH6IcYEmKw External slack for Prusa Shield discussions]

== Status ==
=== Capacity ===
* 5 Prusa 3D printers
** 1.75mm PETG
** each can make 8 shields a day
* 4 other type
** 3mm PETG
** each can make 3 a day
* 4 other type 2
** 3mm PETG
** each can make 3 a day
* Remote print capability
** What is our current capacity in the community? We are working that out now - so many people are volunteering!
* 3 Laser cutters
** The shields cut quickly and we are only limited by material sourcing
* Assembly is very quick, we can easily keep up

=== Supplies ===
As of 3/23/2020 1:15PM
* We have 1.75mm PETG reels to last through this week
* We are out of 3mm PETG and have more on order
* By the end of the day we will have enough PETG sheeting to make about 4,500 face shields
* We have 30 yards of button hole elastic, only enough for 135 face shields.

===Summary===
* If we have enough material we can make at least 65 face shields a day as of 3/23/2020.
* We currently have about 85 ready to be assembled (3/23/2020 1:15pm)
** We are waiting for final approval on the actual shield design from our health care provider partner.

3D printed face shields

2020-03-28T05:57:07Z

Hzeller: Point to 1.2

[[File:Face shield front.jpg|200px]] [[File:Face shield side.jpg|350px]] [[File:Face shield top.jpg|350px]]

== Overview ==
Face shields are used by health care professionals to protect them when working with patients. Hospital supplies are running low. While they prefer to use commercially manufactured ones, in this emergency they are looking for alternative sources.

The headband portion of these shields is made on a 3D printer. If you have a 3D printer, you can make these. We have several at Maker Nexus that will be running as long as we have supplies. We need volunteers come in to service the printing. We also need volunteers to assemble the final shields. We will deliver them to local hospitals.

* [https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform Sign up to use your own 3D printer] to help
* [https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform Sign up to receive face shields] for your health care facility

[[MN COVID Response|Other COVID Projects]]

Watch a short [https://www.ktvu.com/news/covid-19-sunnyvale-company-designing-3d-protective-masks-to-meet-demand KTVU news report about our efforts.]

[http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

== Is there really a need? ==
* We've heard from friends that "nurses are cutting up plastic soda bottles to make face shields, using saran wrap on top of N95 masks to allow for multi-use."
* One local nurse said they are making face shields from cut up shower curtains and hot glue guns.

In reviewing the current design: "The nurses were over the moon about how easily the shields can be disassembled and sterilized."

We are ramping up to make 1,000 a week, maybe more.

If your health care facility needs face shields, fill in this form:

[https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform?usp=sf_link My Facility Needs Face Shields] (click the link)

== 3D Print Parts At Home ==

=== Use Your 3D Printer for good ===

==== Sign up ====
We are establishing a network of 3D printer owners who can make the headbands for us. You make them and deliver them to our facility where we do the assembly and get them to the hospitals. If you want to be part of our network, fill in this form and we will contact you:

[https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform I want to help make them]

==== Report your progress ====
If you've signed-up and started printing already:
[https://docs.google.com/spreadsheets/d/1Aoq7a0YbkPbGiMZGSxBgo0ySlgDWZHoaCvXc8sx9FU8/edit Keep us updated with your print progress].
Please request permission to access the file if you're prompted to, and we'll respond as quickly as we can.

=== What to do with the finished product ===
When you have parts ready to deliver, please follow the following steps:
# Fill out [https://docs.google.com/forms/d/e/1FAIpQLSdJfZz5M-xxQifJmFBdNQcn7c3i5eFabV7StA5ep9zsJuco9Q/viewform?usp=sf_link this form] with information about your donation (so we can track inventory)
# Seal in plastic bag.
# Label bag with your email, the version of face shield you printed, the material printed with (Currently RC2v1 is the most up to date part) and the date you closed the bag.
# Mail to
Maker Nexus
234 E. Carribean Drive
Sunnyvale, CA 94089
OR
Deliver to us if you are local and it does not violate the Shelter In Place Order - please do not make a special trip for this - but if you are passing by on your way to get essential groceries and want to drop it off, that is acceptable - there is a box outside our front door where donated parts can be placed.

Please be sure you are following proper sanitation procedures when you bag parts - if possible, wear gloves and a breathing mask, wipe or spray with disinfectant if available. We want to minimize the chance of cross-contamination. After it reaches MN, we will be further disinfecting them before delivering to its end destination.

We are not in a position to supply you with filament. If we are successful at raising more money for this program, then we might be able to give you a new reel when you drop off 20 face shield sets.

== 3D Print Directions ==

=== Materials ===

==== PETG filament Sources ====

These face shields are best done with PETG filament. A 1kg spool can make about 20 units.

* [http://matterhackers.com Matter Hackers]
** 3mm product id # MF3CF7NH 1kg about $25
** 1.75mm product id # M3MY2VQG 1kg about $24 (only $20 each if you buy 5)
** 1.75mm product id # MTVEPT25 10 pounds (4.5kg) about $185 It is a higher quality PETG filament, but is it really worth the extra cost?

==== PETG Sheet Sources ====

One 48x96 inch sheet can make about 24 shields.

* [http://www.piedmontplastics.com Piedmont Plastics] in San Leandro, CA. .020x48x96 CLR VIVAK PETG JFM about $16/sheet.

=== Instructions ===

==== Printer Settings ====

Print with PETG for ease of sanitation - IPA, Hydrogen Peroxide, Bleach, and Acetic Acid up to 10% can all be safely used with PETG.

Print settings:
* Temperature based on filament selection.
* 3 perimeters
* 100% infill
* 0.3mm Draft settings in PrusaSlicer work fine
* we are running our Prusa's at 130% speed

=== Parts ===
We are focusing production on the Prusa RC2 headband with some modification to reduce weight and center the mounting pins, based on feedback from medical professionals.
If your printer is large enough to print this design, PLEASE switch production to that. If your printer cannot accommodate that, RC1 pieces are still helpful. See below for details on each.

==== RC2 + MakerNexus extensions (PREFERRED) ====

The MakerNexus modifications [https://github.com/hzeller/prusa-covid19-shield-remix are on github].
Easiest is to download the release at https://github.com/hzeller/prusa-covid19-shield-remix/releases (latest is v1.2)

This archive contains (next to the source files) the following files used used to print, which you also can download here:

* '''Ready-to-go''': [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.2/normal_shield_0.3mm_PETG_MK3S.gcode normal_shield_0.3mm_PETG_MK3S.gcode] '''GCode''' for MK3S printer for PETG 0.3mm, 3 shells, 100% infill; printing two headbands. You can use this directly in your Prusa MK3/MK3S printer. Using print-speed of 130% on the Prusa seems to work fine.
* '''modify print parameters''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.2/normal_shield.3mf normal_shield.3mf] '''3MF''' file to load in slicer. Contains support-material setup. It works in a [https://www.prusa3d.com/prusaslicer/ prusa-slicer] (I use version 2.2.0), and should also work in other slicers.
* '''slice yourself''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.2/normal_shield_with_support.stl normal_shield_with_support.stl] The '''STL''' file. It already contains integrated supports for the pins (the file normal_shield_no_support.stl does not have supports if you want to do that in the slicer).
* There are also short_shield versions of the above: they don't have hex-holes and are a little less thick for faster print-time (don't use yet, currently in testing).

==== Older Versions ====
===== RC2 : Prusa STL file =====
Pre-arranged to print 2 at one time.
* [[:media:covid19_headband_rc2_2x.stl|Prusa RC2 (x2)]] STL File
For other arrangements, here's the [https://www.prusaprinters.org/prints/25857-protective-face-shield-rc1 original Prusa design page].

====== G-codes ======
Direct gcode files for common printers (WIP):
* Prusa MK3S (Right click and select "Save link as". Then save as type ".gcode" -- instead of .txt -- before printing!):
** [[:media:CovidShield_RC2_2x_0.25mm_PETG_MK3S_6h17m.gcode.txt| RC2(x2) / PETG]]
** [[:media:CovidShield_RC2_2x_0.25mm_PLA_MK3S_5h56m.gcode.txt| RC2(x2) / PLA]]

===== RC1 : Older Prusa STL file =====
Pre-arranged to print 3 at one time.
* [[:media:COVID19 SHIELD R1 3x.stl|Prusa RC1 (x3)]] STL File
For other arrangements, here's the [https://www.prusaprinters.org/prints/25857-protective-face-shield-rc1 original Prusa design page].

== Laser Cut Parts ==

* [[:media:Faceshield-laser.svg|The SVG file for laser cutting the shield part]] SVG File

The shields are cut from 0.020 inch thick PETG sheets. Our base design fits into sheets of 24"x32". If we get donations of larger sheets, then we cut it down before using it.

== Elastic Band ==

Each shield uses approximately 8 inches of button hole elastic, 3/4 inch wide.

Sources
* [https://www.homesew.com/ Home Sew]

== Assembly ==

Assembly requires about 8" of 3/4 wide button hole elastic.

* A short video on [https://youtu.be/qKqDUExM4Q8 how to assemble the Maker Nexus face shield version RC2]

* The original design [https://www.prusaprinters.org/prints/25857-prusa-protective-face-shield-rc2 Prusa RC2 STL- On this page]

== Disassembly for cleaning ==

These face shields can be taken apart for cleaning.

The sheets are made of PETG and can handle alcohol and UV. The head band and spreader could be made of PETG, ABS, or PLA. These all resist alcohol but are heat sensitive. We are not experts in how to sanitize equipment. You, as user, take responsibility for appropriate sanitization. See [https://help.prusa3d.com/en/article/prusa-face-shield-disinfection_125457#_ga=2.91675610.133084680.1585293016-139199844.1585293016 this page from Prusa Research] for information on sanitization methods currently being tested.

A short video on [https://www.youtube.com/watch?v=F7FFPzGeRME how to take the Maker Nexus face shield apart]

== Help at MN ==
At this time we do not need volunteers in the makerspace itself. The space is on lockdown so that we do not introduce the virus into our work area.

=== Donations Needed ===
* PETG filament is useful - if you aren't able to print yourself. Any color in both 1.75mm and 3mm diameter filament. It should be in a factory sealed box or in a bag with desiccant.
* 3/4"-1" button hole elastic
* 0.020" thick PETG film for disposable masks, sheets or rolls

You can drop-off the donations at Maker Nexus, just leave it in the box by the front door of Maker Nexus. Please use appropriate procedures when packaging - including wearing a new pair of gloves and a face mask if available.

You can also donate via PayPal towards COVID-19 efforts that Maker Nexus is working on. [http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

=== Who to contact ===
MN members join the #covid-faceshield channel on [https://www.makernexus.com/member-dashboard Slack]

If you don't have access to Slack, please email [mailto:faceshields@makernexus.org faceshields@makernexus.org]

== External Links ==

=== Information & Discussions ===
- [https://join.slack.com/t/prusafaceshields/shared_invite/zt-cz809azp-f41jGEYZivRKWH6IcYEmKw External slack for Prusa Shield discussions]

== Status ==
=== Capacity ===
* 5 Prusa 3D printers
** 1.75mm PETG
** each can make 8 shields a day
* 4 other type
** 3mm PETG
** each can make 3 a day
* 4 other type 2
** 3mm PETG
** each can make 3 a day
* Remote print capability
** What is our current capacity in the community? We are working that out now - so many people are volunteering!
* 3 Laser cutters
** The shields cut quickly and we are only limited by material sourcing
* Assembly is very quick, we can easily keep up

=== Supplies ===
As of 3/23/2020 1:15PM
* We have 1.75mm PETG reels to last through this week
* We are out of 3mm PETG and have more on order
* By the end of the day we will have enough PETG sheeting to make about 4,500 face shields
* We have 30 yards of button hole elastic, only enough for 135 face shields.

===Summary===
* If we have enough material we can make at least 65 face shields a day as of 3/23/2020.
* We currently have about 85 ready to be assembled (3/23/2020 1:15pm)
** We are waiting for final approval on the actual shield design from our health care provider partner.

3D printed face shields

2020-03-28T02:55:41Z

Hzeller: /* RC2 + MakerNexus extensions (PREFERRED) */

[[File:Face shield front.jpg|200px]] [[File:Face shield side.jpg|350px]] [[File:Face shield top.jpg|350px]]

== Overview ==
Face shields are used by health care professionals to protect them when working with patients. Hospital supplies are running low. While they prefer to use commercially manufactured ones, in this emergency they are looking for alternative sources.

The headband portion of these shields is made on a 3D printer. If you have a 3D printer, you can make these. We have several at Maker Nexus that will be running as long as we have supplies. We need volunteers come in to service the printing. We also need volunteers to assemble the final shields. We will deliver them to local hospitals.

* [https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform Sign up to use your own 3D printer] to help
* [https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform Sign up to receive face shields] for your health care facility

[[MN COVID Response|Other COVID Projects]]

Watch a short [https://www.ktvu.com/news/covid-19-sunnyvale-company-designing-3d-protective-masks-to-meet-demand KTVU news report about our efforts.]

[http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

== Is there really a need? ==
* We've heard from friends that "nurses are cutting up plastic soda bottles to make face shields, using saran wrap on top of N95 masks to allow for multi-use."
* One local nurse said they are making face shields from cut up shower curtains and hot glue guns.

In reviewing the current design: "The nurses were over the moon about how easily the shields can be disassembled and sterilized."

We are ramping up to make 1,000 a week, maybe more.

If your health care facility needs face shields, fill in this form:

[https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform?usp=sf_link My Facility Needs Face Shields] (click the link)

== 3D Print Parts At Home ==

=== Use Your 3D Printer for good ===

==== Sign up ====
We are establishing a network of 3D printer owners who can make the headbands for us. You make them and deliver them to our facility where we do the assembly and get them to the hospitals. If you want to be part of our network, fill in this form and we will contact you:

[https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform I want to help make them]

==== Report your progress ====
If you've signed-up and started printing already:
[https://docs.google.com/spreadsheets/d/1Aoq7a0YbkPbGiMZGSxBgo0ySlgDWZHoaCvXc8sx9FU8/edit Keep us updated with your print progress].
Please request permission to access the file if you're prompted to, and we'll respond as quickly as we can.

=== What to do with the finished product ===
When you have parts ready to deliver, please follow the following steps:
# Fill out [https://docs.google.com/forms/d/e/1FAIpQLSdJfZz5M-xxQifJmFBdNQcn7c3i5eFabV7StA5ep9zsJuco9Q/viewform?usp=sf_link this form] with information about your donation (so we can track inventory)
# Seal in plastic bag.
# Label bag with your email, the version of face shield you printed, the material printed with (Currently RC2v1 is the most up to date part) and the date you closed the bag.
# Mail to
Maker Nexus
234 E. Carribean Drive
Sunnyvale, CA 94089
OR
Deliver to us if you are local and it does not violate the Shelter In Place Order - please do not make a special trip for this - but if you are passing by on your way to get essential groceries and want to drop it off, that is acceptable - there is a box outside our front door where donated parts can be placed.

Please be sure you are following proper sanitation procedures when you bag parts - if possible, wear gloves and a breathing mask, wipe or spray with disinfectant if available. We want to minimize the chance of cross-contamination. After it reaches MN, we will be further disinfecting them before delivering to its end destination.

We are not in a position to supply you with filament. If we are successful at raising more money for this program, then we might be able to give you a new reel when you drop off 20 face shield sets.

== 3D Print Directions ==

=== Materials ===

==== PETG filament Sources ====

These face shields are best done with PETG filament. A 1kg spool can make about 20 units.

* [http://matterhackers.com Matter Hackers]
** 3mm product id # MF3CF7NH 1kg about $25
** 1.75mm product id # M3MY2VQG 1kg about $24 (only $20 each if you buy 5)
** 1.75mm product id # MTVEPT25 10 pounds (4.5kg) about $185 It is a higher quality PETG filament, but is it really worth the extra cost?

==== PETG Sheet Sources ====

One 48x96 inch sheet can make about 24 shields.

* [http://www.piedmontplastics.com Piedmont Plastics] in San Leandro, CA. .020x48x96 CLR VIVAK PETG JFM about $16/sheet.

=== Instructions ===

==== Printer Settings ====

Print with PETG for ease of sanitation - IPA, Hydrogen Peroxide, Bleach, and Acetic Acid up to 10% can all be safely used with PETG.

Print settings:
* Temperature based on filament selection.
* 3 perimeters
* 100% infill
* 0.3mm Draft settings in PrusaSlicer work fine
* we are running our Prusa's at 130% speed

=== Parts ===
We are focusing production on the Prusa RC2 headband with some modification to reduce weight and center the mounting pins, based on feedback from medical professionals.
If your printer is large enough to print this design, PLEASE switch production to that. If your printer cannot accommodate that, RC1 pieces are still helpful. See below for details on each.

==== RC2 + MakerNexus extensions (PREFERRED) ====

The MakerNexus modifications [https://github.com/hzeller/prusa-covid19-shield-remix are on github].
Easiest is to download the release at https://github.com/hzeller/prusa-covid19-shield-remix/releases (latest is v1.1)

This archive contains (next to the source files) the following files used used to print, which you also can download here:

* '''Ready-to-go''': [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.1/normal_shield_0.3mm_PETG_MK3S.gcode normal_shield_0.3mm_PETG_MK3S.gcode] '''GCode''' for MK3S printer for PETG 0.3mm, 3 shells, 30% infill; printing two headbands. You can use this directly in your Prusa MK3/MK3S printer. Using print-speed of 130% on the Prusa seems to work fine.
* '''modify print parameters''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.1/normal_shield.3mf normal_shield.3mf] '''3MF''' file to load in slicer. Contains support-material setup. It works in a [https://www.prusa3d.com/prusaslicer/ prusa-slicer] (I use version 2.2.0), and should also work in other slicers.
* '''slice yourself''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.1/normal_shield_with_support.stl normal_shield_with_support.stl] The '''STL''' file. It already contains integrated supports for the pins (the file normal_shield_no_support.stl does not have supports if you want to do that in the slicer).
* There are also short_shield versions of the above: they don't have hex-holes and are a little less thick for faster print-time (don't use yet, currently in testing).

==== Older Versions ====
===== RC2 : Prusa STL file =====
Pre-arranged to print 2 at one time.
* [[:media:covid19_headband_rc2_2x.stl|Prusa RC2 (x2)]] STL File
For other arrangements, here's the [https://www.prusaprinters.org/prints/25857-protective-face-shield-rc1 original Prusa design page].

====== G-codes ======
Direct gcode files for common printers (WIP):
* Prusa MK3S (Right click and select "Save link as". Then save as type ".gcode" -- instead of .txt -- before printing!):
** [[:media:CovidShield_RC2_2x_0.25mm_PETG_MK3S_6h17m.gcode.txt| RC2(x2) / PETG]]
** [[:media:CovidShield_RC2_2x_0.25mm_PLA_MK3S_5h56m.gcode.txt| RC2(x2) / PLA]]

===== RC1 : Older Prusa STL file =====
Pre-arranged to print 3 at one time.
* [[:media:COVID19 SHIELD R1 3x.stl|Prusa RC1 (x3)]] STL File
For other arrangements, here's the [https://www.prusaprinters.org/prints/25857-protective-face-shield-rc1 original Prusa design page].

== Laser Cut Parts ==

* [[:media:Faceshield-laser.svg|The SVG file for laser cutting the shield part]] SVG File

The shields are cut from 0.020 inch thick PETG sheets. Our base design fits into sheets of 24"x32". If we get donations of larger sheets, then we cut it down before using it.

== Elastic Band ==

Each shield uses approximately 8 inches of button hole elastic, 3/4 inch wide.

Sources
* [https://www.homesew.com/ Home Sew]

== Assembly ==

Assembly requires about 8" of 3/4 wide button hole elastic.

* A short video on [https://youtu.be/qKqDUExM4Q8 how to assemble the Maker Nexus face shield version RC2]

* The original design [https://www.prusaprinters.org/prints/25857-prusa-protective-face-shield-rc2 Prusa RC2 STL- On this page]

== Disassembly for cleaning ==

These face shields can be taken apart for cleaning.

The sheets are made of PETG and can handle alcohol and UV. The head band and spreader could be made of PETG, ABS, or PLA. These all resist alcohol but are heat sensitive. We are not experts in how to sanitize equipment. You, as user, take responsibility for appropriate sanitization. See [https://help.prusa3d.com/en/article/prusa-face-shield-disinfection_125457#_ga=2.91675610.133084680.1585293016-139199844.1585293016 this page from Prusa Research] for information on sanitization methods currently being tested.

A short video on [https://www.youtube.com/watch?v=F7FFPzGeRME how to take the Maker Nexus face shield apart]

== Help at MN ==
At this time we do not need volunteers in the makerspace itself. The space is on lockdown so that we do not introduce the virus into our work area.

=== Donations Needed ===
* PETG filament is useful - if you aren't able to print yourself. Any color in both 1.75mm and 3mm diameter filament. It should be in a factory sealed box or in a bag with desiccant.
* 3/4"-1" button hole elastic
* 0.020" thick PETG film for disposable masks, sheets or rolls

You can drop-off the donations at Maker Nexus, just leave it in the box by the front door of Maker Nexus. Please use appropriate procedures when packaging - including wearing a new pair of gloves and a face mask if available.

You can also donate via PayPal towards COVID-19 efforts that Maker Nexus is working on. [http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

=== Who to contact ===
MN members join the #covid-faceshield channel on [https://www.makernexus.com/member-dashboard Slack]

If you don't have access to Slack, please email [mailto:faceshields@makernexus.org faceshields@makernexus.org]

== External Links ==

=== Information & Discussions ===
- [https://join.slack.com/t/prusafaceshields/shared_invite/zt-cz809azp-f41jGEYZivRKWH6IcYEmKw External slack for Prusa Shield discussions]

== Status ==
=== Capacity ===
* 5 Prusa 3D printers
** 1.75mm PETG
** each can make 8 shields a day
* 4 other type
** 3mm PETG
** each can make 3 a day
* 4 other type 2
** 3mm PETG
** each can make 3 a day
* Remote print capability
** What is our current capacity in the community? We are working that out now - so many people are volunteering!
* 3 Laser cutters
** The shields cut quickly and we are only limited by material sourcing
* Assembly is very quick, we can easily keep up

=== Supplies ===
As of 3/23/2020 1:15PM
* We have 1.75mm PETG reels to last through this week
* We are out of 3mm PETG and have more on order
* By the end of the day we will have enough PETG sheeting to make about 4,500 face shields
* We have 30 yards of button hole elastic, only enough for 135 face shields.

===Summary===
* If we have enough material we can make at least 65 face shields a day as of 3/23/2020.
* We currently have about 85 ready to be assembled (3/23/2020 1:15pm)
** We are waiting for final approval on the actual shield design from our health care provider partner.

3D printed face shields

2020-03-28T02:53:06Z

Hzeller: speed factor - don't be too specific about expected runtime.

[[File:Face shield front.jpg|200px]] [[File:Face shield side.jpg|350px]] [[File:Face shield top.jpg|350px]]

== Overview ==
Face shields are used by health care professionals to protect them when working with patients. Hospital supplies are running low. While they prefer to use commercially manufactured ones, in this emergency they are looking for alternative sources.

The headband portion of these shields is made on a 3D printer. If you have a 3D printer, you can make these. We have several at Maker Nexus that will be running as long as we have supplies. We need volunteers come in to service the printing. We also need volunteers to assemble the final shields. We will deliver them to local hospitals.

* [https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform Sign up to use your own 3D printer] to help
* [https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform Sign up to receive face shields] for your health care facility

[[MN COVID Response|Other COVID Projects]]

Watch a short [https://www.ktvu.com/news/covid-19-sunnyvale-company-designing-3d-protective-masks-to-meet-demand KTVU news report about our efforts.]

[http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

== Is there really a need? ==
* We've heard from friends that "nurses are cutting up plastic soda bottles to make face shields, using saran wrap on top of N95 masks to allow for multi-use."
* One local nurse said they are making face shields from cut up shower curtains and hot glue guns.

In reviewing the current design: "The nurses were over the moon about how easily the shields can be disassembled and sterilized."

We are ramping up to make 1,000 a week, maybe more.

If your health care facility needs face shields, fill in this form:

[https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform?usp=sf_link My Facility Needs Face Shields] (click the link)

== 3D Print Parts At Home ==

=== Use Your 3D Printer for good ===

==== Sign up ====
We are establishing a network of 3D printer owners who can make the headbands for us. You make them and deliver them to our facility where we do the assembly and get them to the hospitals. If you want to be part of our network, fill in this form and we will contact you:

[https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform I want to help make them]

==== Report your progress ====
If you've signed-up and started printing already:
[https://docs.google.com/spreadsheets/d/1Aoq7a0YbkPbGiMZGSxBgo0ySlgDWZHoaCvXc8sx9FU8/edit Keep us updated with your print progress].
Please request permission to access the file if you're prompted to, and we'll respond as quickly as we can.

=== What to do with the finished product ===
When you have parts ready to deliver, please follow the following steps:
# Fill out [https://docs.google.com/forms/d/e/1FAIpQLSdJfZz5M-xxQifJmFBdNQcn7c3i5eFabV7StA5ep9zsJuco9Q/viewform?usp=sf_link this form] with information about your donation (so we can track inventory)
# Seal in plastic bag.
# Label bag with your email, the version of face shield you printed, the material printed with (Currently RC2v1 is the most up to date part) and the date you closed the bag.
# Mail to
Maker Nexus
234 E. Carribean Drive
Sunnyvale, CA 94089
OR
Deliver to us if you are local and it does not violate the Shelter In Place Order - please do not make a special trip for this - but if you are passing by on your way to get essential groceries and want to drop it off, that is acceptable - there is a box outside our front door where donated parts can be placed.

Please be sure you are following proper sanitation procedures when you bag parts - if possible, wear gloves and a breathing mask, wipe or spray with disinfectant if available. We want to minimize the chance of cross-contamination. After it reaches MN, we will be further disinfecting them before delivering to its end destination.

We are not in a position to supply you with filament. If we are successful at raising more money for this program, then we might be able to give you a new reel when you drop off 20 face shield sets.

== 3D Print Directions ==

=== Materials ===

==== PETG filament Sources ====

These face shields are best done with PETG filament. A 1kg spool can make about 20 units.

* [http://matterhackers.com Matter Hackers]
** 3mm product id # MF3CF7NH 1kg about $25
** 1.75mm product id # M3MY2VQG 1kg about $24 (only $20 each if you buy 5)
** 1.75mm product id # MTVEPT25 10 pounds (4.5kg) about $185 It is a higher quality PETG filament, but is it really worth the extra cost?

==== PETG Sheet Sources ====

One 48x96 inch sheet can make about 24 shields.

* [http://www.piedmontplastics.com Piedmont Plastics] in San Leandro, CA. .020x48x96 CLR VIVAK PETG JFM about $16/sheet.

=== Instructions ===

==== Printer Settings ====

Print with PETG for ease of sanitation - IPA, Hydrogen Peroxide, Bleach, and Acetic Acid up to 10% can all be safely used with PETG.

Print settings:
* Temperature based on filament selection.
* 3 perimeters
* 100% infill
* 0.3mm Draft settings in PrusaSlicer work fine
* we are running our Prusa's at 130% speed

=== Parts ===
We are focusing production on the Prusa RC2 headband with some modification to reduce weight and center the mounting pins, based on feedback from medical professionals.
If your printer is large enough to print this design, PLEASE switch production to that. If your printer cannot accommodate that, RC1 pieces are still helpful. See below for details on each.

==== RC2 + MakerNexus extensions (PREFERRED) ====

The MakerNexus modifications [https://github.com/hzeller/prusa-covid19-shield-remix are on github].
Easiest is to download the release at https://github.com/hzeller/prusa-covid19-shield-remix/releases (latest is v1.1)

This archive contains (next to the source files) the following files used used to print, which you also can download here:

* '''Ready-to-go''': [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.1/normal_shield_0.3mm_PETG_MK3S.gcode normal_shield_0.3mm_PETG_MK3S.gcode] '''GCode''' for MK3S printer for PETG 0.3mm, 3 shells, 30% infill; printing two headbands. You can use this directly in your Prusa MK3/MK3S printer. Using print-speed of 130% on the Prusa seems to work fine.
* '''modify print parameters''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.1/normal_shield.3mf normal_shield.3mf] '''3MF''' file to load in slicer. Contains support-material setup. It works in a [https://www.prusa3d.com/prusaslicer/ prusa-slicer] (I use version 2.2.0), and should also work in other slicers.
* '''slice yourself''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.1/normal_shield_with_support.stl normal_shield_with_support.stl] The '''STL''' file. It already contains integrated supports for the pins (there is also one without support if you want to do that in the slicer).
* There are also short_shield versions of the above: they don't have hex-holes and are a little less thick for faster print-time (don't use yet, currently in testing).

==== Older Versions ====
===== RC2 : Prusa STL file =====
Pre-arranged to print 2 at one time.
* [[:media:covid19_headband_rc2_2x.stl|Prusa RC2 (x2)]] STL File
For other arrangements, here's the [https://www.prusaprinters.org/prints/25857-protective-face-shield-rc1 original Prusa design page].

====== G-codes ======
Direct gcode files for common printers (WIP):
* Prusa MK3S (Right click and select "Save link as". Then save as type ".gcode" -- instead of .txt -- before printing!):
** [[:media:CovidShield_RC2_2x_0.25mm_PETG_MK3S_6h17m.gcode.txt| RC2(x2) / PETG]]
** [[:media:CovidShield_RC2_2x_0.25mm_PLA_MK3S_5h56m.gcode.txt| RC2(x2) / PLA]]

===== RC1 : Older Prusa STL file =====
Pre-arranged to print 3 at one time.
* [[:media:COVID19 SHIELD R1 3x.stl|Prusa RC1 (x3)]] STL File
For other arrangements, here's the [https://www.prusaprinters.org/prints/25857-protective-face-shield-rc1 original Prusa design page].

== Laser Cut Parts ==

* [[:media:Faceshield-laser.svg|The SVG file for laser cutting the shield part]] SVG File

The shields are cut from 0.020 inch thick PETG sheets. Our base design fits into sheets of 24"x32". If we get donations of larger sheets, then we cut it down before using it.

== Elastic Band ==

Each shield uses approximately 8 inches of button hole elastic, 3/4 inch wide.

Sources
* [https://www.homesew.com/ Home Sew]

== Assembly ==

Assembly requires about 8" of 3/4 wide button hole elastic.

* A short video on [https://youtu.be/qKqDUExM4Q8 how to assemble the Maker Nexus face shield version RC2]

* The original design [https://www.prusaprinters.org/prints/25857-prusa-protective-face-shield-rc2 Prusa RC2 STL- On this page]

== Disassembly for cleaning ==

These face shields can be taken apart for cleaning.

The sheets are made of PETG and can handle alcohol and UV. The head band and spreader could be made of PETG, ABS, or PLA. These all resist alcohol but are heat sensitive. We are not experts in how to sanitize equipment. You, as user, take responsibility for appropriate sanitization. See [https://help.prusa3d.com/en/article/prusa-face-shield-disinfection_125457#_ga=2.91675610.133084680.1585293016-139199844.1585293016 this page from Prusa Research] for information on sanitization methods currently being tested.

A short video on [https://www.youtube.com/watch?v=F7FFPzGeRME how to take the Maker Nexus face shield apart]

== Help at MN ==
At this time we do not need volunteers in the makerspace itself. The space is on lockdown so that we do not introduce the virus into our work area.

=== Donations Needed ===
* PETG filament is useful - if you aren't able to print yourself. Any color in both 1.75mm and 3mm diameter filament. It should be in a factory sealed box or in a bag with desiccant.
* 3/4"-1" button hole elastic
* 0.020" thick PETG film for disposable masks, sheets or rolls

You can drop-off the donations at Maker Nexus, just leave it in the box by the front door of Maker Nexus. Please use appropriate procedures when packaging - including wearing a new pair of gloves and a face mask if available.

You can also donate via PayPal towards COVID-19 efforts that Maker Nexus is working on. [http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

=== Who to contact ===
MN members join the #covid-faceshield channel on [https://www.makernexus.com/member-dashboard Slack]

If you don't have access to Slack, please email [mailto:faceshields@makernexus.org faceshields@makernexus.org]

== External Links ==

=== Information & Discussions ===
- [https://join.slack.com/t/prusafaceshields/shared_invite/zt-cz809azp-f41jGEYZivRKWH6IcYEmKw External slack for Prusa Shield discussions]

== Status ==
=== Capacity ===
* 5 Prusa 3D printers
** 1.75mm PETG
** each can make 8 shields a day
* 4 other type
** 3mm PETG
** each can make 3 a day
* 4 other type 2
** 3mm PETG
** each can make 3 a day
* Remote print capability
** What is our current capacity in the community? We are working that out now - so many people are volunteering!
* 3 Laser cutters
** The shields cut quickly and we are only limited by material sourcing
* Assembly is very quick, we can easily keep up

=== Supplies ===
As of 3/23/2020 1:15PM
* We have 1.75mm PETG reels to last through this week
* We are out of 3mm PETG and have more on order
* By the end of the day we will have enough PETG sheeting to make about 4,500 face shields
* We have 30 yards of button hole elastic, only enough for 135 face shields.

===Summary===
* If we have enough material we can make at least 65 face shields a day as of 3/23/2020.
* We currently have about 85 ready to be assembled (3/23/2020 1:15pm)
** We are waiting for final approval on the actual shield design from our health care provider partner.

3D printed face shields

2020-03-28T02:34:06Z

Hzeller: Mention short_shield.

[[File:Face shield front.jpg|200px]] [[File:Face shield side.jpg|350px]] [[File:Face shield top.jpg|350px]]

== Overview ==
Face shields are used by health care professionals to protect them when working with patients. Hospital supplies are running low. While they prefer to use commercially manufactured ones, in this emergency they are looking for alternative sources.

The headband portion of these shields is made on a 3D printer. If you have a 3D printer, you can make these. We have several at Maker Nexus that will be running as long as we have supplies. We need volunteers come in to service the printing. We also need volunteers to assemble the final shields. We will deliver them to local hospitals.

* [https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform Sign up to use your own 3D printer] to help
* [https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform Sign up to receive face shields] for your health care facility

[[MN COVID Response|Other COVID Projects]]

Watch a short [https://www.ktvu.com/news/covid-19-sunnyvale-company-designing-3d-protective-masks-to-meet-demand KTVU news report about our efforts.]

[http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

== Is there really a need? ==
* We've heard from friends that "nurses are cutting up plastic soda bottles to make face shields, using saran wrap on top of N95 masks to allow for multi-use."
* One local nurse said they are making face shields from cut up shower curtains and hot glue guns.

In reviewing the current design: "The nurses were over the moon about how easily the shields can be disassembled and sterilized."

We are ramping up to make 1,000 a week, maybe more.

If your health care facility needs face shields, fill in this form:

[https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform?usp=sf_link My Facility Needs Face Shields] (click the link)

== 3D Print Parts At Home ==

=== Use Your 3D Printer for good ===

==== Sign up ====
We are establishing a network of 3D printer owners who can make the headbands for us. You make them and deliver them to our facility where we do the assembly and get them to the hospitals. If you want to be part of our network, fill in this form and we will contact you:

[https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform I want to help make them]

==== Report your progress ====
If you've signed-up and started printing already:
[https://docs.google.com/spreadsheets/d/1Aoq7a0YbkPbGiMZGSxBgo0ySlgDWZHoaCvXc8sx9FU8/edit Keep us updated with your print progress].
Please request permission to access the file if you're prompted to, and we'll respond as quickly as we can.

=== What to do with the finished product ===
When you have parts ready to deliver, please follow the following steps:
# Fill out [https://docs.google.com/forms/d/e/1FAIpQLSdJfZz5M-xxQifJmFBdNQcn7c3i5eFabV7StA5ep9zsJuco9Q/viewform?usp=sf_link this form] with information about your donation (so we can track inventory)
# Seal in plastic bag.
# Label bag with your email, the version of face shield you printed, the material printed with (Currently RC2v1 is the most up to date part) and the date you closed the bag.
# Mail to
Maker Nexus
234 E. Carribean Drive
Sunnyvale, CA 94089
OR
Deliver to us if you are local and it does not violate the Shelter In Place Order - please do not make a special trip for this - but if you are passing by on your way to get essential groceries and want to drop it off, that is acceptable - there is a box outside our front door where donated parts can be placed.

Please be sure you are following proper sanitation procedures when you bag parts - if possible, wear gloves and a breathing mask, wipe or spray with disinfectant if available. We want to minimize the chance of cross-contamination. After it reaches MN, we will be further disinfecting them before delivering to its end destination.

We are not in a position to supply you with filament. If we are successful at raising more money for this program, then we might be able to give you a new reel when you drop off 20 face shield sets.

== 3D Print Directions ==

=== Materials ===

==== PETG filament Sources ====

These face shields are best done with PETG filament. A 1kg spool can make about 20 units.

* [http://matterhackers.com Matter Hackers]
** 3mm product id # MF3CF7NH 1kg about $25
** 1.75mm product id # M3MY2VQG 1kg about $24 (only $20 each if you buy 5)
** 1.75mm product id # MTVEPT25 10 pounds (4.5kg) about $185 It is a higher quality PETG filament, but is it really worth the extra cost?

==== PETG Sheet Sources ====

One 48x96 inch sheet can make about 24 shields.

* [http://www.piedmontplastics.com Piedmont Plastics] in San Leandro, CA. .020x48x96 CLR VIVAK PETG JFM about $16/sheet.

=== Instructions ===

==== Printer Settings ====

Print with PETG for ease of sanitation - IPA, Hydrogen Peroxide, Bleach, and Acetic Acid up to 10% can all be safely used with PETG.

Print settings:
* Temperature based on filament selection.
* 3 perimeters
* 100% infill
* 0.3mm Draft settings in PrusaSlicer work fine
* we are running our Prusa's at 130% speed

=== Parts ===
We are focusing production on the Prusa RC2 headband with some modification to reduce weight and center the mounting pins, based on feedback from medical professionals.
If your printer is large enough to print this design, PLEASE switch production to that. If your printer cannot accommodate that, RC1 pieces are still helpful. See below for details on each.

==== RC2 + MakerNexus extensions (PREFERRED) ====

The MakerNexus modifications [https://github.com/hzeller/prusa-covid19-shield-remix are on github].
Easiest is to download the release at https://github.com/hzeller/prusa-covid19-shield-remix/releases (latest is v1.1)

This archive contains (next to the source files) the following files used used to print, which you also can download here:

* '''Ready-to-go''': [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.1/normal_shield_0.3mm_PETG_MK3S.gcode normal_shield_0.3mm_PETG_MK3S.gcode] '''GCode''' for MK3S printer for PETG 0.3mm, 3 shells, 30% infill; printing two headbands. You can use this directly in your Prusa MK3/MK3S printer. I change the print speed to 130% on the printer and the output is still excellent. Print time ~4:30h with 130% speed.
* '''modify print parameters''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.1/normal_shield.3mf normal_shield.3mf] '''3MF''' file to load in slicer. Contains support-material setup. It works in a [https://www.prusa3d.com/prusaslicer/ prusa-slicer] (I use version 2.2.0), and should also work in other slicers.
* '''slice yourself''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.1/normal_shield_with_support.stl normal_shield_with_support.stl] The '''STL''' file. It already contains integrated supports for the pins (there is also one without support if you want to do that in the slicer).
* There are also short_shield versions of the above: they don't have hex-holes and are a little less thick for faster print-time (don't use yet, currently in testing).

==== Older Versions ====
===== RC2 : Prusa STL file =====
Pre-arranged to print 2 at one time.
* [[:media:covid19_headband_rc2_2x.stl|Prusa RC2 (x2)]] STL File
For other arrangements, here's the [https://www.prusaprinters.org/prints/25857-protective-face-shield-rc1 original Prusa design page].

====== G-codes ======
Direct gcode files for common printers (WIP):
* Prusa MK3S (Right click and select "Save link as". Then save as type ".gcode" -- instead of .txt -- before printing!):
** [[:media:CovidShield_RC2_2x_0.25mm_PETG_MK3S_6h17m.gcode.txt| RC2(x2) / PETG]]
** [[:media:CovidShield_RC2_2x_0.25mm_PLA_MK3S_5h56m.gcode.txt| RC2(x2) / PLA]]

===== RC1 : Older Prusa STL file =====
Pre-arranged to print 3 at one time.
* [[:media:COVID19 SHIELD R1 3x.stl|Prusa RC1 (x3)]] STL File
For other arrangements, here's the [https://www.prusaprinters.org/prints/25857-protective-face-shield-rc1 original Prusa design page].

== Laser Cut Parts ==

* [[:media:Faceshield-laser.svg|The SVG file for laser cutting the shield part]] SVG File

The shields are cut from 0.020 inch thick PETG sheets. Our base design fits into sheets of 24"x32". If we get donations of larger sheets, then we cut it down before using it.

== Elastic Band ==

Each shield uses approximately 8 inches of button hole elastic, 3/4 inch wide.

Sources
* [https://www.homesew.com/ Home Sew]

== Assembly ==

Assembly requires about 8" of 3/4 wide button hole elastic.

* A short video on [https://youtu.be/qKqDUExM4Q8 how to assemble the Maker Nexus face shield version RC2]

* The original design [https://www.prusaprinters.org/prints/25857-prusa-protective-face-shield-rc2 Prusa RC2 STL- On this page]

== Disassembly for cleaning ==

These face shields can be taken apart for cleaning.

The sheets are made of PETG and can handle alcohol and UV. The head band and spreader could be made of PETG, ABS, or PLA. These all resist alcohol but are heat sensitive. We are not experts in how to sanitize equipment. You, as user, take responsibility for appropriate sanitization. See [https://help.prusa3d.com/en/article/prusa-face-shield-disinfection_125457#_ga=2.91675610.133084680.1585293016-139199844.1585293016 this page from Prusa Research] for information on sanitization methods currently being tested.

A short video on [https://www.youtube.com/watch?v=F7FFPzGeRME how to take the Maker Nexus face shield apart]

== Help at MN ==
At this time we do not need volunteers in the makerspace itself. The space is on lockdown so that we do not introduce the virus into our work area.

=== Donations Needed ===
* PETG filament is useful - if you aren't able to print yourself. Any color in both 1.75mm and 3mm diameter filament. It should be in a factory sealed box or in a bag with desiccant.
* 3/4"-1" button hole elastic
* 0.020" thick PETG film for disposable masks, sheets or rolls

You can drop-off the donations at Maker Nexus, just leave it in the box by the front door of Maker Nexus. Please use appropriate procedures when packaging - including wearing a new pair of gloves and a face mask if available.

You can also donate via PayPal towards COVID-19 efforts that Maker Nexus is working on. [http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

=== Who to contact ===
MN members join the #covid-faceshield channel on [https://www.makernexus.com/member-dashboard Slack]

If you don't have access to Slack, please email [mailto:faceshields@makernexus.org faceshields@makernexus.org]

== External Links ==

=== Information & Discussions ===
- [https://join.slack.com/t/prusafaceshields/shared_invite/zt-cz809azp-f41jGEYZivRKWH6IcYEmKw External slack for Prusa Shield discussions]

== Status ==
=== Capacity ===
* 5 Prusa 3D printers
** 1.75mm PETG
** each can make 8 shields a day
* 4 other type
** 3mm PETG
** each can make 3 a day
* 4 other type 2
** 3mm PETG
** each can make 3 a day
* Remote print capability
** What is our current capacity in the community? We are working that out now - so many people are volunteering!
* 3 Laser cutters
** The shields cut quickly and we are only limited by material sourcing
* Assembly is very quick, we can easily keep up

=== Supplies ===
As of 3/23/2020 1:15PM
* We have 1.75mm PETG reels to last through this week
* We are out of 3mm PETG and have more on order
* By the end of the day we will have enough PETG sheeting to make about 4,500 face shields
* We have 30 yards of button hole elastic, only enough for 135 face shields.

===Summary===
* If we have enough material we can make at least 65 face shields a day as of 3/23/2020.
* We currently have about 85 ready to be assembled (3/23/2020 1:15pm)
** We are waiting for final approval on the actual shield design from our health care provider partner.

3D printed face shields

2020-03-28T02:30:54Z

Hzeller: Point download links to exact tag number.

[[File:Face shield front.jpg|200px]] [[File:Face shield side.jpg|350px]] [[File:Face shield top.jpg|350px]]

== Overview ==
Face shields are used by health care professionals to protect them when working with patients. Hospital supplies are running low. While they prefer to use commercially manufactured ones, in this emergency they are looking for alternative sources.

The headband portion of these shields is made on a 3D printer. If you have a 3D printer, you can make these. We have several at Maker Nexus that will be running as long as we have supplies. We need volunteers come in to service the printing. We also need volunteers to assemble the final shields. We will deliver them to local hospitals.

* [https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform Sign up to use your own 3D printer] to help
* [https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform Sign up to receive face shields] for your health care facility

[[MN COVID Response|Other COVID Projects]]

Watch a short [https://www.ktvu.com/news/covid-19-sunnyvale-company-designing-3d-protective-masks-to-meet-demand KTVU news report about our efforts.]

[http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

== Is there really a need? ==
* We've heard from friends that "nurses are cutting up plastic soda bottles to make face shields, using saran wrap on top of N95 masks to allow for multi-use."
* One local nurse said they are making face shields from cut up shower curtains and hot glue guns.

In reviewing the current design: "The nurses were over the moon about how easily the shields can be disassembled and sterilized."

We are ramping up to make 1,000 a week, maybe more.

If your health care facility needs face shields, fill in this form:

[https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform?usp=sf_link My Facility Needs Face Shields] (click the link)

== 3D Print Parts At Home ==

=== Use Your 3D Printer for good ===

==== Sign up ====
We are establishing a network of 3D printer owners who can make the headbands for us. You make them and deliver them to our facility where we do the assembly and get them to the hospitals. If you want to be part of our network, fill in this form and we will contact you:

[https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform I want to help make them]

==== Report your progress ====
If you've signed-up and started printing already:
[https://docs.google.com/spreadsheets/d/1Aoq7a0YbkPbGiMZGSxBgo0ySlgDWZHoaCvXc8sx9FU8/edit Keep us updated with your print progress].
Please request permission to access the file if you're prompted to, and we'll respond as quickly as we can.

=== What to do with the finished product ===
When you have parts ready to deliver, please follow the following steps:
# Fill out [https://docs.google.com/forms/d/e/1FAIpQLSdJfZz5M-xxQifJmFBdNQcn7c3i5eFabV7StA5ep9zsJuco9Q/viewform?usp=sf_link this form] with information about your donation (so we can track inventory)
# Seal in plastic bag.
# Label bag with your email, the version of face shield you printed, the material printed with (Currently RC2v1 is the most up to date part) and the date you closed the bag.
# Mail to
Maker Nexus
234 E. Carribean Drive
Sunnyvale, CA 94089
OR
Deliver to us if you are local and it does not violate the Shelter In Place Order - please do not make a special trip for this - but if you are passing by on your way to get essential groceries and want to drop it off, that is acceptable - there is a box outside our front door where donated parts can be placed.

Please be sure you are following proper sanitation procedures when you bag parts - if possible, wear gloves and a breathing mask, wipe or spray with disinfectant if available. We want to minimize the chance of cross-contamination. After it reaches MN, we will be further disinfecting them before delivering to its end destination.

We are not in a position to supply you with filament. If we are successful at raising more money for this program, then we might be able to give you a new reel when you drop off 20 face shield sets.

== 3D Print Directions ==

=== Materials ===

==== PETG filament Sources ====

These face shields are best done with PETG filament. A 1kg spool can make about 20 units.

* [http://matterhackers.com Matter Hackers]
** 3mm product id # MF3CF7NH 1kg about $25
** 1.75mm product id # M3MY2VQG 1kg about $24 (only $20 each if you buy 5)
** 1.75mm product id # MTVEPT25 10 pounds (4.5kg) about $185 It is a higher quality PETG filament, but is it really worth the extra cost?

==== PETG Sheet Sources ====

One 48x96 inch sheet can make about 24 shields.

* [http://www.piedmontplastics.com Piedmont Plastics] in San Leandro, CA. .020x48x96 CLR VIVAK PETG JFM about $16/sheet.

=== Instructions ===

==== Printer Settings ====

Print with PETG for ease of sanitation - IPA, Hydrogen Peroxide, Bleach, and Acetic Acid up to 10% can all be safely used with PETG.

Print settings:
* Temperature based on filament selection.
* 3 perimeters
* 100% infill
* 0.3mm Draft settings in PrusaSlicer work fine
* we are running our Prusa's at 130% speed

=== Parts ===
We are focusing production on the Prusa RC2 headband with some modification to reduce weight and center the mounting pins, based on feedback from medical professionals.
If your printer is large enough to print this design, PLEASE switch production to that. If your printer cannot accommodate that, RC1 pieces are still helpful. See below for details on each.

==== RC2 + MakerNexus extensions (PREFERRED) ====

The MakerNexus modifications [https://github.com/hzeller/prusa-covid19-shield-remix are on github].
Easiest is to download the release at https://github.com/hzeller/prusa-covid19-shield-remix/releases (latest is v1.1)

This archive contains (next to the source files) the following files used used to print, which you also can download here:

* '''Ready-to-go''': [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.1/normal_shield_0.3mm_PETG_MK3S.gcode normal_shield_0.3mm_PETG_MK3S.gcode] '''GCode''' for MK3S printer for PETG 0.3mm, 3 shells, 30% infill; printing two headbands. You can use this directly in your Prusa MK3/MK3S printer. I change the print speed to 130% on the printer and the output is still excellent. Print time ~4:30h with 130% speed.
* '''modify print parameters''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.1/normal_shield.3mf normal_shield.3mf] '''3MF''' file to load in slicer. Contains support-material setup. It works in a [https://www.prusa3d.com/prusaslicer/ prusa-slicer] (I use version 2.2.0), and should also work in other slicers.
* '''slice yourself''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/v1.1/normal_shield_with_support.stl normal_shield_with_support.stl] The '''STL''' file. It already contains integrated supports for the pins (there is also one without support if you want to do that in the slicer).

==== Older Versions ====
===== RC2 : Prusa STL file =====
Pre-arranged to print 2 at one time.
* [[:media:covid19_headband_rc2_2x.stl|Prusa RC2 (x2)]] STL File
For other arrangements, here's the [https://www.prusaprinters.org/prints/25857-protective-face-shield-rc1 original Prusa design page].

====== G-codes ======
Direct gcode files for common printers (WIP):
* Prusa MK3S (Right click and select "Save link as". Then save as type ".gcode" -- instead of .txt -- before printing!):
** [[:media:CovidShield_RC2_2x_0.25mm_PETG_MK3S_6h17m.gcode.txt| RC2(x2) / PETG]]
** [[:media:CovidShield_RC2_2x_0.25mm_PLA_MK3S_5h56m.gcode.txt| RC2(x2) / PLA]]

===== RC1 : Older Prusa STL file =====
Pre-arranged to print 3 at one time.
* [[:media:COVID19 SHIELD R1 3x.stl|Prusa RC1 (x3)]] STL File
For other arrangements, here's the [https://www.prusaprinters.org/prints/25857-protective-face-shield-rc1 original Prusa design page].

== Laser Cut Parts ==

* [[:media:Faceshield-laser.svg|The SVG file for laser cutting the shield part]] SVG File

The shields are cut from 0.020 inch thick PETG sheets. Our base design fits into sheets of 24"x32". If we get donations of larger sheets, then we cut it down before using it.

== Elastic Band ==

Each shield uses approximately 8 inches of button hole elastic, 3/4 inch wide.

Sources
* [https://www.homesew.com/ Home Sew]

== Assembly ==

Assembly requires about 8" of 3/4 wide button hole elastic.

* A short video on [https://youtu.be/qKqDUExM4Q8 how to assemble the Maker Nexus face shield version RC2]

* The original design [https://www.prusaprinters.org/prints/25857-prusa-protective-face-shield-rc2 Prusa RC2 STL- On this page]

== Disassembly for cleaning ==

These face shields can be taken apart for cleaning.

The sheets are made of PETG and can handle alcohol and UV. The head band and spreader could be made of PETG, ABS, or PLA. These all resist alcohol but are heat sensitive. We are not experts in how to sanitize equipment. You, as user, take responsibility for appropriate sanitization. See [https://help.prusa3d.com/en/article/prusa-face-shield-disinfection_125457#_ga=2.91675610.133084680.1585293016-139199844.1585293016 this page from Prusa Research] for information on sanitization methods currently being tested.

A short video on [https://www.youtube.com/watch?v=F7FFPzGeRME how to take the Maker Nexus face shield apart]

== Help at MN ==
At this time we do not need volunteers in the makerspace itself. The space is on lockdown so that we do not introduce the virus into our work area.

=== Donations Needed ===
* PETG filament is useful - if you aren't able to print yourself. Any color in both 1.75mm and 3mm diameter filament. It should be in a factory sealed box or in a bag with desiccant.
* 3/4"-1" button hole elastic
* 0.020" thick PETG film for disposable masks, sheets or rolls

You can drop-off the donations at Maker Nexus, just leave it in the box by the front door of Maker Nexus. Please use appropriate procedures when packaging - including wearing a new pair of gloves and a face mask if available.

You can also donate via PayPal towards COVID-19 efforts that Maker Nexus is working on. [http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

=== Who to contact ===
MN members join the #covid-faceshield channel on [https://www.makernexus.com/member-dashboard Slack]

If you don't have access to Slack, please email [mailto:faceshields@makernexus.org faceshields@makernexus.org]

== External Links ==

=== Information & Discussions ===
- [https://join.slack.com/t/prusafaceshields/shared_invite/zt-cz809azp-f41jGEYZivRKWH6IcYEmKw External slack for Prusa Shield discussions]

== Status ==
=== Capacity ===
* 5 Prusa 3D printers
** 1.75mm PETG
** each can make 8 shields a day
* 4 other type
** 3mm PETG
** each can make 3 a day
* 4 other type 2
** 3mm PETG
** each can make 3 a day
* Remote print capability
** What is our current capacity in the community? We are working that out now - so many people are volunteering!
* 3 Laser cutters
** The shields cut quickly and we are only limited by material sourcing
* Assembly is very quick, we can easily keep up

=== Supplies ===
As of 3/23/2020 1:15PM
* We have 1.75mm PETG reels to last through this week
* We are out of 3mm PETG and have more on order
* By the end of the day we will have enough PETG sheeting to make about 4,500 face shields
* We have 30 yards of button hole elastic, only enough for 135 face shields.

===Summary===
* If we have enough material we can make at least 65 face shields a day as of 3/23/2020.
* We currently have about 85 ready to be assembled (3/23/2020 1:15pm)
** We are waiting for final approval on the actual shield design from our health care provider partner.

3D printed face shields

2020-03-28T02:26:18Z

Hzeller: Update to version 1.1 in git

[[File:Face shield front.jpg|200px]] [[File:Face shield side.jpg|350px]] [[File:Face shield top.jpg|350px]]

== Overview ==
Face shields are used by health care professionals to protect them when working with patients. Hospital supplies are running low. While they prefer to use commercially manufactured ones, in this emergency they are looking for alternative sources.

The headband portion of these shields is made on a 3D printer. If you have a 3D printer, you can make these. We have several at Maker Nexus that will be running as long as we have supplies. We need volunteers come in to service the printing. We also need volunteers to assemble the final shields. We will deliver them to local hospitals.

* [https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform Sign up to use your own 3D printer] to help
* [https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform Sign up to receive face shields] for your health care facility

[[MN COVID Response|Other COVID Projects]]

Watch a short [https://www.ktvu.com/news/covid-19-sunnyvale-company-designing-3d-protective-masks-to-meet-demand KTVU news report about our efforts.]

[http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

== Is there really a need? ==
* We've heard from friends that "nurses are cutting up plastic soda bottles to make face shields, using saran wrap on top of N95 masks to allow for multi-use."
* One local nurse said they are making face shields from cut up shower curtains and hot glue guns.

In reviewing the current design: "The nurses were over the moon about how easily the shields can be disassembled and sterilized."

We are ramping up to make 1,000 a week, maybe more.

If your health care facility needs face shields, fill in this form:

[https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform?usp=sf_link My Facility Needs Face Shields] (click the link)

== 3D Print Parts At Home ==

=== Use Your 3D Printer for good ===

==== Sign up ====
We are establishing a network of 3D printer owners who can make the headbands for us. You make them and deliver them to our facility where we do the assembly and get them to the hospitals. If you want to be part of our network, fill in this form and we will contact you:

[https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform I want to help make them]

==== Report your progress ====
If you've signed-up and started printing already:
[https://docs.google.com/spreadsheets/d/1Aoq7a0YbkPbGiMZGSxBgo0ySlgDWZHoaCvXc8sx9FU8/edit Keep us updated with your print progress].
Please request permission to access the file if you're prompted to, and we'll respond as quickly as we can.

=== What to do with the finished product ===
When you have parts ready to deliver, please follow the following steps:
# Fill out [https://docs.google.com/forms/d/e/1FAIpQLSdJfZz5M-xxQifJmFBdNQcn7c3i5eFabV7StA5ep9zsJuco9Q/viewform?usp=sf_link this form] with information about your donation (so we can track inventory)
# Seal in plastic bag.
# Label bag with your email, the version of face shield you printed, the material printed with (Currently RC2v1 is the most up to date part) and the date you closed the bag.
# Mail to
Maker Nexus
234 E. Carribean Drive
Sunnyvale, CA 94089
OR
Deliver to us if you are local and it does not violate the Shelter In Place Order - please do not make a special trip for this - but if you are passing by on your way to get essential groceries and want to drop it off, that is acceptable - there is a box outside our front door where donated parts can be placed.

Please be sure you are following proper sanitation procedures when you bag parts - if possible, wear gloves and a breathing mask, wipe or spray with disinfectant if available. We want to minimize the chance of cross-contamination. After it reaches MN, we will be further disinfecting them before delivering to its end destination.

We are not in a position to supply you with filament. If we are successful at raising more money for this program, then we might be able to give you a new reel when you drop off 20 face shield sets.

== 3D Print Directions ==

=== Materials ===

==== PETG filament Sources ====

These face shields are best done with PETG filament. A 1kg spool can make about 20 units.

* [http://matterhackers.com Matter Hackers]
** 3mm product id # MF3CF7NH 1kg about $25
** 1.75mm product id # M3MY2VQG 1kg about $24 (only $20 each if you buy 5)
** 1.75mm product id # MTVEPT25 10 pounds (4.5kg) about $185 It is a higher quality PETG filament, but is it really worth the extra cost?

==== PETG Sheet Sources ====

One 48x96 inch sheet can make about 24 shields.

* [http://www.piedmontplastics.com Piedmont Plastics] in San Leandro, CA. .020x48x96 CLR VIVAK PETG JFM about $16/sheet.

=== Instructions ===

==== Printer Settings ====

Print with PETG for ease of sanitation - IPA, Hydrogen Peroxide, Bleach, and Acetic Acid up to 10% can all be safely used with PETG.

Print settings:
* Temperature based on filament selection.
* 3 perimeters
* 100% infill
* 0.3mm Draft settings in PrusaSlicer work fine
* we are running our Prusa's at 130% speed

=== Parts ===
We are focusing production on the Prusa RC2 headband with some modification to reduce weight and center the mounting pins, based on feedback from medical professionals.
If your printer is large enough to print this design, PLEASE switch production to that. If your printer cannot accommodate that, RC1 pieces are still helpful. See below for details on each.

==== RC2 + MakerNexus extensions (PREFERRED) ====

The MakerNexus modifications [https://github.com/hzeller/prusa-covid19-shield-remix are on github].
Easiest is to download the release at https://github.com/hzeller/prusa-covid19-shield-remix/releases (latest is v1.1)

This archive contains (next to the source files) the following files used used to print, which you also can download here:

* '''Ready-to-go''': [https://github.com/hzeller/prusa-covid19-shield-remix/raw/master/normal_shield_0.3mm_PETG_MK3S.gcode normal_shield_0.3mm_PETG_MK3S.gcode] '''GCode''' for MK3S printer for PETG 0.3mm, 3 shells, 30% infill; printing two headbands. You can use this directly in your Prusa MK3/MK3S printer. I change the print speed to 130% on the printer and the output is still excellent. Print time ~4:30h with 130% speed.
* '''modify print parameters''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/master/normal_shield.3mf normal_shield.3mf] '''3MF''' file to load in slicer. Contains support-material setup. It works in a [https://www.prusa3d.com/prusaslicer/ prusa-slicer] (I use version 2.2.0), and should also work in other slicers.
* '''slice yourself''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/master/normal_shield_with_support.stl normal_shield_with_support.stl] The '''STL''' file. It already contains integrated supports for the pins (there is also one without support if you want to do that in the slicer).

==== Older Versions ====
===== RC2 : Prusa STL file =====
Pre-arranged to print 2 at one time.
* [[:media:covid19_headband_rc2_2x.stl|Prusa RC2 (x2)]] STL File
For other arrangements, here's the [https://www.prusaprinters.org/prints/25857-protective-face-shield-rc1 original Prusa design page].

====== G-codes ======
Direct gcode files for common printers (WIP):
* Prusa MK3S (Right click and select "Save link as". Then save as type ".gcode" -- instead of .txt -- before printing!):
** [[:media:CovidShield_RC2_2x_0.25mm_PETG_MK3S_6h17m.gcode.txt| RC2(x2) / PETG]]
** [[:media:CovidShield_RC2_2x_0.25mm_PLA_MK3S_5h56m.gcode.txt| RC2(x2) / PLA]]

===== RC1 : Older Prusa STL file =====
Pre-arranged to print 3 at one time.
* [[:media:COVID19 SHIELD R1 3x.stl|Prusa RC1 (x3)]] STL File
For other arrangements, here's the [https://www.prusaprinters.org/prints/25857-protective-face-shield-rc1 original Prusa design page].

== Laser Cut Parts ==

* [[:media:Faceshield-laser.svg|The SVG file for laser cutting the shield part]] SVG File

The shields are cut from 0.020 inch thick PETG sheets. Our base design fits into sheets of 24"x32". If we get donations of larger sheets, then we cut it down before using it.

== Elastic Band ==

Each shield uses approximately 8 inches of button hole elastic, 3/4 inch wide.

Sources
* [https://www.homesew.com/ Home Sew]

== Assembly ==

Assembly requires about 8" of 3/4 wide button hole elastic.

* A short video on [https://youtu.be/qKqDUExM4Q8 how to assemble the Maker Nexus face shield version RC2]

* The original design [https://www.prusaprinters.org/prints/25857-prusa-protective-face-shield-rc2 Prusa RC2 STL- On this page]

== Disassembly for cleaning ==

These face shields can be taken apart for cleaning.

The sheets are made of PETG and can handle alcohol and UV. The head band and spreader could be made of PETG, ABS, or PLA. These all resist alcohol but are heat sensitive. We are not experts in how to sanitize equipment. You, as user, take responsibility for appropriate sanitization. See [https://help.prusa3d.com/en/article/prusa-face-shield-disinfection_125457#_ga=2.91675610.133084680.1585293016-139199844.1585293016 this page from Prusa Research] for information on sanitization methods currently being tested.

A short video on [https://www.youtube.com/watch?v=F7FFPzGeRME how to take the Maker Nexus face shield apart]

== Help at MN ==
At this time we do not need volunteers in the makerspace itself. The space is on lockdown so that we do not introduce the virus into our work area.

=== Donations Needed ===
* PETG filament is useful - if you aren't able to print yourself. Any color in both 1.75mm and 3mm diameter filament. It should be in a factory sealed box or in a bag with desiccant.
* 3/4"-1" button hole elastic
* 0.020" thick PETG film for disposable masks, sheets or rolls

You can drop-off the donations at Maker Nexus, just leave it in the box by the front door of Maker Nexus. Please use appropriate procedures when packaging - including wearing a new pair of gloves and a face mask if available.

You can also donate via PayPal towards COVID-19 efforts that Maker Nexus is working on. [http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

=== Who to contact ===
MN members join the #covid-faceshield channel on [https://www.makernexus.com/member-dashboard Slack]

If you don't have access to Slack, please email [mailto:faceshields@makernexus.org faceshields@makernexus.org]

== External Links ==

=== Information & Discussions ===
- [https://join.slack.com/t/prusafaceshields/shared_invite/zt-cz809azp-f41jGEYZivRKWH6IcYEmKw External slack for Prusa Shield discussions]

== Status ==
=== Capacity ===
* 5 Prusa 3D printers
** 1.75mm PETG
** each can make 8 shields a day
* 4 other type
** 3mm PETG
** each can make 3 a day
* 4 other type 2
** 3mm PETG
** each can make 3 a day
* Remote print capability
** What is our current capacity in the community? We are working that out now - so many people are volunteering!
* 3 Laser cutters
** The shields cut quickly and we are only limited by material sourcing
* Assembly is very quick, we can easily keep up

=== Supplies ===
As of 3/23/2020 1:15PM
* We have 1.75mm PETG reels to last through this week
* We are out of 3mm PETG and have more on order
* By the end of the day we will have enough PETG sheeting to make about 4,500 face shields
* We have 30 yards of button hole elastic, only enough for 135 face shields.

===Summary===
* If we have enough material we can make at least 65 face shields a day as of 3/23/2020.
* We currently have about 85 ready to be assembled (3/23/2020 1:15pm)
** We are waiting for final approval on the actual shield design from our health care provider partner.

3D printed face shields

2020-03-27T02:08:20Z

Hzeller: /* RC2 + MakerNexus extensions (PREFERRED) */

[[File:Face shield front.jpg|200px]] [[File:Face shield side.jpg|350px]] [[File:Face shield top.jpg|350px]]

== Overview ==
Face shields are used by health care professionals to protect them when working with patients. Hospital supplies are running low. While they prefer to use commercially manufactured ones, in this emergency they are looking for alternative sources.

These shields are made on a 3D printer. If you have a 3D printer, you can make these. We have several at Maker Nexus that will be running as long as we have supplies. We need volunteers come in to service the printing. We also need volunteers to assemble the final shields. We will deliver them to local hospitals.

* [https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform Sign up to use your own 3D printer] to help
* [https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform Sign up to receive face shields] for your health care facility

[[MN COVID Response|Other COVID Projects]]

Watch a short [https://www.ktvu.com/news/covid-19-sunnyvale-company-designing-3d-protective-masks-to-meet-demand KTVU news report about our efforts.]

[http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

== Is there really a need? ==
* We've heard from friends that "nurses are cutting up plastic soda bottles to make face shields, using saran wrap on top of N95 masks to allow for multi-use."
* One local nurse said they are making face shields from cut up shower curtains and hot glue guns.

In reviewing the current design: "The nurses were over the moon about how easily the shields can be disassembled and sterilized."

We are ramping up to make 1,000 a week, maybe more.

If your health care facility needs face shields, fill in this form:

[https://docs.google.com/forms/d/e/1FAIpQLSetfP2_-Wh7nZehMFQyFvElZALMGc7BLJZd_7HZfZqNEdoWoA/viewform?usp=sf_link My Facility Needs Face Shields] (click the link)

== 3D Print Parts At Home ==

=== Use Your 3D Printer for good ===

==== Sign up ====
We are establishing a network of 3D printer owners who can make the headbands for us. You make them and deliver them to our facility where we do the assembly and get them to the hospitals. If you want to be part of our network, fill in this form and we will contact you:

[https://docs.google.com/forms/d/e/1FAIpQLSe5uMbl2USWKg6Qi6HovydA6lteBgnRsIBWnQcJaL4x6OdryQ/viewform I want to help make them]

==== Report your progress ====
If you've signed-up and started printing already:
[https://docs.google.com/spreadsheets/d/1Aoq7a0YbkPbGiMZGSxBgo0ySlgDWZHoaCvXc8sx9FU8/edit Keep us updated with your print progress].
Please request permission to access the file if you're prompted to, and we'll respond as quickly as we can.

=== What to do with the finished product ===
When you have parts ready to deliver, please follow the following steps:
# Seal in plastic bag.
# Label bag with version of face shield you printed, the material printed with (Currently RC2v1 is the most up to date part) and the date you closed the bag.
# Mail to
Maker Nexus
234 E. Carribean Drive
Sunnyvale, CA 94089
OR
Deliver to us if you are local and it does not violate the Shelter In Place Order - please do not make a special trip for this - but if you are passing by on your way to get essential groceries and want to drop it off, that is acceptable - there is a box outside our front door where donated parts can be placed.

Please be sure you are following proper sanitation procedures when you bag parts - if possible, wear gloves and a breathing mask, wipe or spray with disinfectant if available. We want to minimize the chance of cross-contamination. After it reaches MN, we will be further disinfecting them before delivering to its end destination.

We are not in a position to supply you with filament. If we are successful at raising more money for this program, then we might be able to give you a new reel when you drop off 20 face shield sets.

== 3D Print Directions ==

=== Materials ===

==== PETG filament Sources ====

These face shields are best done with PETG filament. A 1kg spool can make about 20 units.

* [http://matterhackers.com Matter Hackers]
** 3mm product id # MF3CF7NH 1kg about $25
** 1.75mm product id # M3MY2VQG 1kg about $24 (only $20 each if you buy 5)
** 1.75mm product id # MTVEPT25 10 pounds (4.5kg) about $185 It is a higher quality PETG filament, but is it really worth the extra cost?

==== PETG Sheet Sources ====

One 48x96 inch sheet can make about 24 shields.

* [http://www.piedmontplastics.com Piedmont Plastics] in San Leandro, CA. .020x48x96 CLR VIVAK PETG JFM about $16/sheet.

=== Instructions ===

==== Printer Settings ====

Print with PETG for ease of sanitation - IPA, Hydrogen Peroxide, Bleach, and Acetic Acid up to 10% can all be safely used with PETG.

Print settings:
* Temperature based on filament selection.
* 3 perimeters
* 100% infill
* 0.3mm Draft settings in PrusaSlicer work fine
* we are running our Prusa's at 130% speed

=== Parts ===
We are focusing production on the Prusa RC2 headband with some modification to reduce weight and center the mounting pins, based on feedback from medical professionals.
If your printer is large enough to print this design, PLEASE switch production to that. If your printer cannot accommodate that, RC1 pieces are still helpful. See below for details on each.

==== RC2 + MakerNexus extensions (PREFERRED) ====

The MakerNexus modifications [https://github.com/hzeller/prusa-covid19-shield-remix are on github].
Easiest is to download the release at https://github.com/hzeller/prusa-covid19-shield-remix/releases

This archive contains (next to the source files) the following files used used to print, which you also can download here:

* '''Ready-to-go''': [https://github.com/hzeller/prusa-covid19-shield-remix/raw/master/prusa-covid-shield-remix-print_shield_0.3mm_PETG_MK3S.gcode prusa-covid-shield-remix-print_shield_0.3mm_PETG_MK3S.gcode] '''GCode''' for MK3S printer for PETG 0.3mm, 3 shells, 30% infill; printing two headbands. You can use this directly in your Prusa MK3/MK3S printer. I change the print speed to 130% on the printer and the output is still excellent. Print time ~4:30h with 130% speed.
* '''modify print parameters''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/master/prusa-covid-shield-remix.3mf prusa-covid-shield-remix.3mf] '''3MF''' file to load in slicer. Contains support-material setup. It works in a [https://www.prusa3d.com/prusaslicer/ prusa-slicer] (I use version 2.2.0), but I got report that simplify3d has trouble interpreting the support material instructions.
* '''slice yourself''' [https://github.com/hzeller/prusa-covid19-shield-remix/raw/master/prusa-covid-shield-remix-print_shield.stl prusa-covid-shield-remix-print_shield.stl] The '''STL''' file. If you use this file in your slicer, you have to add support under the face-shield pins manually (there is also the prusa-covid-shield-remix-support_modifier.stl file which provides the exact block places where supports need to be if your slicer can use that).

==== Older Versions ====
===== RC2 : Prusa STL file =====
Pre-arranged to print 2 at one time.
* [[:media:covid19_headband_rc2_2x.stl|Prusa RC2 (x2)]] STL File
For other arrangements, here's the [https://www.prusaprinters.org/prints/25857-protective-face-shield-rc1 original Prusa design page].

====== G-codes ======
Direct gcode files for common printers (WIP):
* Prusa MK3S (Right click and select "Save link as". Then save as type ".gcode" -- instead of .txt -- before printing!):
** [[:media:CovidShield_RC2_2x_0.25mm_PETG_MK3S_6h17m.gcode.txt| RC2(x2) / PETG]]
** [[:media:CovidShield_RC2_2x_0.25mm_PLA_MK3S_5h56m.gcode.txt| RC2(x2) / PLA]]

===== RC1 : Older Prusa STL file =====
Pre-arranged to print 3 at one time.
* [[:media:COVID19 SHIELD R1 3x.stl|Prusa RC1 (x3)]] STL File
For other arrangements, here's the [https://www.prusaprinters.org/prints/25857-protective-face-shield-rc1 original Prusa design page].

== Laser Cut Parts ==

* [[:media:Faceshield-laser.svg|The SVG file for laser cutting the shield part]] SVG File

The shields are cut from 0.020 inch thick PETG sheets. Our base design fits into sheets of 24"x32". If we get donations of larger sheets, then we cut it down before using it.

== Elastic Band ==

Each shield uses approximately 8 inches of button hole elastic, 3/4 inch wide.

Sources
* [https://www.homesew.com/ Home Sew]

== Assembly ==

Assembly requires about 8" of 3/4 wide button hole elastic.

* A short video on [https://youtu.be/qKqDUExM4Q8 how to assemble the Maker Nexus face shield version RC2]

* The original design [https://www.prusaprinters.org/prints/25857-prusa-protective-face-shield-rc2 Prusa RC2 STL- On this page]

== Disassembly for cleaning ==

These face shields can be taken apart for cleaning.

The sheets are made of PETG and can handle alcohol and UV. The head band and spreader could be made of PETG, ABS, or PLA. These all resist alcohol but are heat sensitive. We are not experts in how to sanitize equipment. You, as user, take responsibility for appropriate sanitization.

A short video on [https://www.youtube.com/watch?v=F7FFPzGeRME how to take the Maker Nexus face shield apart]

== Help at MN ==
At this time we do not need volunteers in the makerspace itself. The space is on lockdown so that we do not introduce the virus into our work area.

=== Donations Needed ===
* PETG filament is useful - if you aren't able to print yourself. Any color in both 1.75mm and 3mm diameter filament. It should be in a factory sealed box or in a bag with desiccant.
* 3/4"-1" button hole elastic
* 0.020" thick PETG film for disposable masks, sheets or rolls

You can drop-off the donations at Maker Nexus, just leave it in the box by the front door of Maker Nexus. Please use appropriate procedures when packaging - including wearing a new pair of gloves and a face mask if available.

You can also donate via PayPal towards COVID-19 efforts that Maker Nexus is working on. [http://www.makernexus.org/donate Donate via Paypal] to support COVID-19 response efforts by Maker Nexus.

=== Who to contact ===
MN members join the #covid-faceshield channel on [https://www.makernexus.com/member-dashboard Slack]

If you don't have access to Slack, please email [mailto:faceshields@makernexus.org faceshields@makernexus.org]

== External Links ==

=== Information & Discussions ===
- [https://join.slack.com/t/prusafaceshields/shared_invite/zt-cz809azp-f41jGEYZivRKWH6IcYEmKw External slack for Prusa Shield discussions]

== Status ==
=== Capacity ===
* 5 Prusa 3D printers
** 1.75mm PETG
** each can make 8 shields a day
* 4 other type
** 3mm PETG
** each can make 3 a day
* 4 other type 2
** 3mm PETG
** each can make 3 a day
* Remote print capability
** What is our current capacity in the community? We are working that out now - so many people are volunteering!
* 3 Laser cutters
** The shields cut quickly and we are only limited by material sourcing
* Assembly is very quick, we can easily keep up

=== Supplies ===
As of 3/23/2020 1:15PM
* We have 1.75mm PETG reels to last through this week
* We are out of 3mm PETG and have more on order
* By the end of the day we will have enough PETG sheeting to make about 4,500 face shields
* We have 30 yards of button hole elastic, only enough for 135 face shields.

===Summary===
* If we have enough material we can make at least 65 face shields a day as of 3/23/2020.
* We currently have about 85 ready to be assembled (3/23/2020 1:15pm)
** We are waiting for final approval on the actual shield design from our health care provider partner.