Saturday, April 11, 2020

3D Printer Face Shields for Medics and Professionals

Me and my friend (owner of Prusa i3 MK3S) also joined the initiative of helping with basic personal protective equipment that is out of stocks these days due to COVID-19.


I've joined to local project Masks4Docs and got STL-file.
My latest settings (version 6) and project is below for Prusa i3 MK3S.
Highlights:
  • This is not a stack version. It has beep at the as finished notification.
  • No need to wipe the bed - never did for 50 items.
  • Slow first layer - very important.
  • No fills on first layer, only 2 walls and filler.
  • Infill 5% with fastest pattern.
  • 2 bottom and 2 top solid layers for durability.
  • This is PLA version and make sure to set extruder temp to 220-230 to overcome filament skipping. You may detect 2-3 skips at start of second layer (speed increased, temp dropped to 205-210) but it will be on inner perimeter, so no worries, then temp will rise to 220 and no skips will be from then.
  • First layer extruder temp is high due to second layer speed increase and temp drop.
IMPORTANT!
This prints were testes on quality plastic from Prusa. Recently I got free roll from 3dfactory.co.il - it has extra smell and you may need to add extra perimeter to have same model strength.



Print Settings
1 print settings - 1 layers and perimeters 
1 print settings - 2 infill
1 print settings - 3 skirt and brim
1 print settings - 4 support material
1 print settings - 5 speed
1 print settings - 7 advanced

Filament Settings
2 filament settings - 1 filament
2 filament settings - 2 cooling
2 filament settings - 3 advanced
Download v6 (outdated) https://www.dropbox.com/s/k3udict2qztr25z/v6-masks4docs-face-shield-alexey.bass-infill.3mf?dl=1

Other useful links
https://www.prusa3d.com/covid19/
https://3dverkstan.se/protective-visor/protective-visor-versions/

UPDATE 2020-04-11 - v7
  1. Better fan speed and only from 3rd layer, fixes thermal runaway (filament skipping).
  2. Dont move dead far away at the end end code, be ready to start again.
  3. Faster start, faster calibration and shorter wipe tower
  4. Download 3MF - https://www.dropbox.com/s/57ha160by0w07kk/v7-masks4docs-face-shield-alexey.bass.3mf?dl=1

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