RE: 3D PRINTED FACE SHIELDS FOR MEDICS AND PROFESSIONALS - JOIN US!
@omari
Me too. If you have exprience, Please let me know about measurement!
RE: 3D PRINTED FACE SHIELDS FOR MEDICS AND PROFESSIONALS - JOIN US!
Hi have three issues ... we are trying buy visors (clear part) for the RC3 version.
1) The drawing says 0.5mm material for visor ... it hard to get in the UK currently ... can we use 1mm thick ? compatible with the other parts ?
2) The slots for mounting... could rectangle be used instead of the curves (ie square the corners) i know its not ideal but have a possible manufacture that cant do the curves in the slots
3) Other than PET for the visor is there any other materials recommended ?
thx
RE: 3D PRINTED FACE SHIELDS FOR MEDICS AND PROFESSIONALS - JOIN US!
10mil transparency film works well.
and miscellaneous other tech projects
He is intelligent, but not experienced. His pattern indicates two dimensional thinking. -- Spock in Star Trek: The Wrath of Khan
RE: 3D PRINTED FACE SHIELDS FOR MEDICS AND PROFESSIONALS - JOIN US!
RE: 3D PRINTED FACE SHIELDS FOR MEDICS AND PROFESSIONALS - JOIN US!
Hello everyone
In reaction to the acute shortage of protective wear for medical personnel in the current pandemic situation, we have quickly developed and started to mass-produce protective face shields.As we have got the designs ready open source from prusaprinters they have kept the designs for social good for the help people and we are ready to do production if we get ample of funding for our donation of face shields to the community.
RE: 3D PRINTED FACE SHIELDS FOR MEDICS AND PROFESSIONALS - JOIN US!
Can you advise if there is a medical/health reason you are aware of as to why the acetate on the PRUSA face shield design is 400 microns?
Many thanks
RE: 3D PRINTED FACE SHIELDS FOR MEDICS AND PROFESSIONALS - JOIN US!
I'm very new to the 3D printing world and have been printing the Prusa shields with varied success. I realize that a lot of the parameters associated with 3D printing will vary from printer to printer. It would be most helpful if a list of critical parameters could be compiled and posted, just to provide a starting point. I've been learning a lot in a short amount of time, but "time" is what we don't have an abundance of fighting COVID-19. Any guidance would be greatly appreciated.
Thanks!!!
RE: 3D PRINTED FACE SHIELDS FOR MEDICS AND PROFESSIONALS - JOIN US!
[...] It would be most helpful if a list of critical parameters could be compiled and posted, just to provide a starting point. I've been learning a lot in a short amount of time, but "time" is what we don't have an abundance of fighting COVID-19. Any guidance would be greatly appreciated.
I've dumped my notes here. If you'd like specific help, you can DM me here or (ideally) contact me via the Masks for Docs slack channel. I've worked with several individuals and groups ramping up production for this situation.
and miscellaneous other tech projects
He is intelligent, but not experienced. His pattern indicates two dimensional thinking. -- Spock in Star Trek: The Wrath of Khan
RE: 3D PRINTED FACE SHIELDS FOR MEDICS AND PROFESSIONALS - JOIN US!
@bobstro
Thanks! I'm constantly learning new things but feel that there's much more to learn. It's great that they shared the Prusa face shield design, bu ta lot of people like myself want to help, but having to start from scratch put me way behind the productivity curve. The values you listed are only a fraction of what's really needed to begin producing sturdy face shield frames. If you're new to 3D printing, even the values posted are confusing. The "Alternate 0.60mm nozzle settings" lists using the "AmazonBasics/Overture PETG", which has a print temp range on the label of 230C-250C, but a value of "260C" is listed. An explanation of why to use the 260C temp would be useful. I learned that the higher temperature is desired, but also learned that leaving the fan off increases the strength and helps prevent delamination. I'm using the Cura slicer, and the settings seem to go on forever. They recommended 0% infill for the frame, which leaves it without voids, but I then learned to increase the wall thickness. Little things like this take time to figure out, and with the high demand for PPE, now is not the time for experimentation. Having profiles for the different slicers available for download would give people a good starting point, with the understanding that some fine tuning will be needed for each printer model. I have one Creality Ender 3 Pro, and two Creality CR-10S printers. Both are popular entry level printers and if I had profiles for each I would have been producing PPE much sooner. It's been great to watch people across the country working for a common cause, but sharing the wealth of knowledge would elevate everyone's productivity when we need it most.
Again, thanks for your help. Stay safe & healthy!
RE: 3D PRINTED FACE SHIELDS FOR MEDICS AND PROFESSIONALS - JOIN US!
[...] It's great that they shared the Prusa face shield design, bu ta lot of people like myself want to help, but having to start from scratch put me way behind the productivity curve.
One of the purposes of the Masks for Docs effort is to coordinate exactly this sort of information exchange. Lots of people there sharing information.
The values you listed are only a fraction of what's really needed to begin producing sturdy face shield frames. If you're new to 3D printing, even the values posted are confusing. The "Alternate 0.60mm nozzle settings" lists using the "AmazonBasics/Overture PETG", which has a print temp range on the label of 230C-250C, but a value of "260C" is listed.
After testing, I've found that particular filament works well at those temps. The manufacturer-specified range is for optimal finish, but these are extraordinary times and finish is less of an issue. Part strength and uniformity are key. I've found I can get more flow out of the nozzle at slightly higher temps. If you're more comfortable using lower temps or are using a different filament, use what works best for you.
An explanation of why to use the 260C temp would be useful.
Heat improves part strength & flow.
I learned that the higher temperature is desired, but also learned that leaving the fan off increases the strength and helps prevent delamination.
It's a trade off. I've found that some prints like the NIH face shield with the thin upper visor will tend to sag without a bit of cooling. I've set the fan to kick in on layers less than 45 second up to a max of 50%. Using these settings with PETG, I can bend the resulting frame arms together, and back out nearly horizontal and they will return to shape. The shield does not snap with vigorous flexing.
I'm using the Cura slicer, and the settings seem to go on forever. They recommended 0% infill for the frame, which leaves it without voids, but I then learned to increase the wall thickness.
This is a one-off situation where a lot of people are printing a limited range of prints with specific characteristics. I've found that most prints work well at 4 perimeters and there's little time saved with either fewer perimeters or varying infill. Most of the prints are almost exclusively printed with perimeters once you get above a 0.4mm nozzle.
Little things like this take time to figure out, and with the high demand for PPE, now is not the time for experimentation. Having profiles for the different slicers available for download would give people a good starting point, with the understanding that some fine tuning will be needed for each printer model.
I'm tweaking my profiles constantly. The settings on that page are current, but I'm doing some additional tweaking this evening. I don't have time to play around with other slicers, so I can't really help there.
I have one Creality Ender 3 Pro, and two Creality CR-10S printers. Both are popular entry level printers and if I had profiles for each I would have been producing PPE much sooner. It's been great to watch people across the country working for a common cause, but sharing the wealth of knowledge would elevate everyone's productivity when we need it most.
I'm (slowly) bringing an Artillery Sidewinder X1 into production. It's a lot tougher to print PETG with, but I'm finding most of my Prusa Mk3 and PrusaSlicer experience is translating directly. PrusaSlicer is my preferred slicer mainly for its ability to handle Max volumetric speeds properly.
Again, thanks for your help. Stay safe & healthy!
You too! DM or contact me via the MFD slack group if you'd like to get into more detail.
and miscellaneous other tech projects
He is intelligent, but not experienced. His pattern indicates two dimensional thinking. -- Spock in Star Trek: The Wrath of Khan
RE: 3D PRINTED FACE SHIELDS FOR MEDICS AND PROFESSIONALS - JOIN US!
Hi there,
I’m trying to make some face shields for our local hospital, but I can only source 1/16” (1.58mm) thick PETG sheet at the moment. From what I’ve tested, I think it has an acceptable bend radius, so I’m almost done modifying the original STL files. Does anyone have a file for this thickness of material already? Thanks!
RE: 3D PRINTED FACE SHIELDS FOR MEDICS AND PROFESSIONALS - JOIN US!
Sorry, no. We're using 7-10mil transparency sheets almost exclusively at this point.
and miscellaneous other tech projects
He is intelligent, but not experienced. His pattern indicates two dimensional thinking. -- Spock in Star Trek: The Wrath of Khan
RE: 3D PRINTED FACE SHIELDS FOR MEDICS AND PROFESSIONALS - JOIN US!
@christopher-c4
Maybe you will find the right material here: https://www.acplasticsinc.com/categories/vivak-petg
good luck!
Statt zu klagen, dass wir nicht alles haben, was wir wollen, sollten wir lieber dankbar sein, dass wir nicht alles bekommen, was wir verdienen.
RE: 3D PRINTED FACE SHIELDS FOR MEDICS AND PROFESSIONALS - JOIN US!
ABOUT CLEAR PLASTIC and ELASTIC BANDS
The University of California Medical School at San Francisco (UCSF) has adapted the Prusa facemask design for cheap, U.S. production. They have gone through four, real-world tested iterations of the design.
They use rubber bands for elastic and 8.5"x11", 3-hole punched transparencies (at Staples, Office Depot, etc.) for shields. They have lightened and flattened the original Prusa design for faster, cheaper printing.
Here's a link from the University Library website that includes a downloadable link to the library.
https://www.library.ucsf.edu/news/ucsf-3d-printed-face-shield-project/
The article has notes about who to contact to drop prints off at the University hospital in San Francisco. If you don't know what to do at your local hospital, they may be able to offer advice. I'm guessing.
Clearly the headband design must be adapted to match whatever you are going to be using for shield material. The UCSF design is specifically adapted for use with 8.5"x11", 3-hole punched transparencies from U.S. office supply stores.
I think that's brilliant. Otherwise, getting plastic punched to match the headband is prohibitive and you're limited to pre-made face shields, which are becoming in short supply as the headbands become less of a limiting factor, thanks to folks like this group.
Disclaimer: I am not affiliated with the University, nor am I as Prusa user (yet). I'm a 3D enthusiast and when saw their article and it had a link to Prusa, from there I found this forum and decided to pass along the info of their updated design.
Good luck and thanks for all your hard work.
August
RE: 3D PRINTED FACE SHIELDS FOR MEDICS AND PROFESSIONALS - JOIN US!
Hi guys,
First, thanks a lot to the prusa team for this initiative. It is definitely most welcome (notably the dentist version in my case).
I would need to modify the model to add a hook for a chirurgical lamp though. Sadly, I cannot find the sources for the model.
Is there a link to modifiable model (openSCAD maybe) for this face shield ?
RE: 3D PRINTED FACE SHIELDS FOR MEDICS AND PROFESSIONALS - JOIN US!
@jeromeprusa
https://www.prusaprinters.org/prints/25857-prusa-face-shield/files
Step data can be imported and edited in almost every 3D-CAD system.
Statt zu klagen, dass wir nicht alles haben, was wir wollen, sollten wir lieber dankbar sein, dass wir nicht alles bekommen, was wir verdienen.
RE: 3D PRINTED FACE SHIELDS FOR MEDICS AND PROFESSIONALS - JOIN US!
@karl-herbert
Thanks, I thought step files were another "final" format ! I'll try to work on them using freeCAD then.
RE: 3D PRINTED FACE SHIELDS FOR MEDICS AND PROFESSIONALS - JOIN US!
@jeromeprusa
Freecad is open source and a good choice. With it you can definitely process Step data and export STL data.
Good luck!
Statt zu klagen, dass wir nicht alles haben, was wir wollen, sollten wir lieber dankbar sein, dass wir nicht alles bekommen, was wir verdienen.
RE: 3D PRINTED FACE SHIELDS FOR MEDICS AND PROFESSIONALS - JOIN US!
in the Netherlands, this is very different.
there is interest as long as it is free.
the government doesn't take the safety of doctors and doctors seriously either.
I live in an area that has been hit the hardest and most goods already go to the wrong places.
where the numbers are still rising and numbers are falling in other areas
especially the people who can print or have made donations go to the wrong places
if Prusa or someone else has donated something to print this product.
sorry but they take advantage of it.
the bad idea of the government is that scouting and schools reopen,
without protection means.
the distance between the people must be 1.5 meters, but everyone knows how children can be.
but the distance to be infected is 7 meters.
this is not to hurt or offend anyone in this form,
but I think everyone should know all about this.
RE: 3D PRINTED FACE SHIELDS FOR MEDICS AND PROFESSIONALS - JOIN US!
@phenbec
One mm should work fine. Rectangular mounting pegs will be more prone to tear; round the corners well and they should be OK, especially with the thicker visor material.