James Finch
FYI... I'm learning 3D Printing concurrently with this project, so don't be surprised if the print quality isn't so great. More likely the STL files quality, due to concurrently learning new software applications, aren't so great and you might find a 3D printer pen a way to seal up the gaps I've identified and am working on resolving in the next round of .stl and .gcode uploads.
Thinking like a Rust Oleum filler paint will seal up the prints well enough and maybe a small bead or even smear layer of silicone as a gasket will further seal mating surface leaks.
The 3M connections will require the 3M rubber gasket.
This is still a brain storming data dump in progress... so keep in mind anything used is at your own risk and am I no way liable for your decisions.
Inspired by the Joshua De Lisle video and not the same design:
You'll need the following for the welding design:
x1 - Wathai 5V USB 75mm x 30mm Turbine Centrifugal Blower Cooling Fan or equivalent
x1 - PWM motor controller or equivalent ~20V to 5V voltage regulator or step down circuit
x1 - Dewalt 20V Battery Holder and Trigger Assembly or 20V to 18V adapter
x2 - 3M 6000/7000 series filters
x1 - CPAP BIBAP Tube or equivalent
x2 - Kevlar Arm Sleeves or equivalent (fabric for covering CPAP hose & hood)
x1 - Full Face Snorkel or equivalent
x1 - Full Face Snorkel Adapter 3D printed (see STL or gcode files)
x1 - Blower Fan adapter (see STL or gcode files)
I'm also working on another design using the Uvex Bionic Face Shield.
zapwizard
ProgressTH
Audrey Robinel
Andy
Invested in a great buy 3M TR-630 TR-640 502Ah Lithium-Ion PAPR Rechargeable Battery With Charger and without a power supply for the charger. Reviewing specs, I found a few 19V 2.37A power supplies may work as candidates. The TOSHIBA 19V 2.37A AC ADAPTER seemed to have the closest looking barrel plug, so purchased a PA5044U-1ACA model. Worked and at a way better price option than the 3M model. Figured I'd make a note here regarding thoughts for making adapters I can't find on the market so to use different headgear, hoses and blowers found on the market I can acquire at price points I can afford. I also plan to adapt bad battery packs for the blowers to use power tool batteries I have readily available and for those I have 12V-36V Battery Low Voltage cut off On Switch Controller Protection Module and 5A DC Step Down Adjustable Voltage Power Converter Buck & Voltmeter XL4015 so to better adapt. For the blowers with three phase motors, I also purchased some DC 5V-36V 15A PWM DC Brushless Motor Speed Control CW CCW Reversible Switch for direct connection and control of the blower motor. Thinking if the power tool battery can fit can carve away the base of the genuine blower batteries once all the cells are removed, so to make the slot for the power tool battery to fit and latch. For the Adflo blower motor filter, there is a 3M Adflo Adapter for 3M Bayonet Filters by hackawayjr and thinking would be interesting to remix to have options for three filter installation so for better spec airflow and also using two or three of the 40MM NATO standard thread which is used with other PAPR blowers like the Breathe Easy Turbo, Airboss FlexAir, MIRA, et.al. Might be useful to have a similar 3D printed or the like filter adapter for the Versaflo series blowers. Conversely, to the 3M Adflo Hose to Versaflo Helmet Adapter Thanks kindly for all those support, Merry Christmas and Happy Holidays!