Versaflo PAPR USB-C powerbank blower and 3M bayonet filter adapter belt unit

I wanted a Versaflo powered air respirator, but I didn't want to pay $1600 for the full kit, so I bought an M-206 helmet ($225), added $50 worth of stuff from AliExpress, and printed the rest. For the full background and bill of materials, see the writeup on my website: https://kevinlynagh.com/papr/

Disclaimer: I threw this together for my comfort as a hobbyist woodworker. If you are working with really dangerous stuff, just pay 3M for the proper setup (or have your employer do so, as OSHA requires). Use your judgment here, and definitely don't sue me because you got hurt following an Internet rando's blog post about assembling junk from AliExpress with plastic noodles from a 3D printer, because then my lawyer will point to this paragraph and you will look like a dumb dumb.

I printed all of the parts from PCTG filament using a 0.6mm nozzle on a Bambu Labs P1S printer with the following settings:

• 0.3mm layer height
• 2 walls with 150% line width, which maximizes the "squish" and thus layer adhesion
• 15% adaptive cubic infill
• 250°C filament temperature
• 80°C build plate temperature (textured PEI plate)
• 16 mm^3/s max volumetric speed

This was my first time printing PCTG and I found it worked great --- no failures and much less stringing compared to PETG. Nothing here is really under serious stress, so I'm sure printing with PLA (especially a more flexible "tough PLA") would also be fine.

The parts took about 2.5 hours to print and consumed 140g of filament, for a total material cost of $4.