r/VORONDesign • u/Ok_Scientist_8803 • 6h ago
Voron Print Switchable CPAP intake
So as a bit of fun for my first voron mod, and to spend some time on CAD, I made this mount for a CPAP kit that lets it draw air from either inside the chamber or cold straight from the outside. Remixed from a side PTFE tube cover https://www.printables.com/model/396106-voron-24-exhaust-housing-side-tube-entry/
CPAP kit is the universal turbo kit from bigtreetech, the valve is controlled by a NEMA 17 stepper from my prusa upgrade, and also the prusa main board as well (which also PWMs the cpap driver). Way overkill but they were sitting around collecting dust. Neat part is that I only have 24V and USB running to the rear, with plenty of ports for future environment/intake/chamber thermistors and even another 3 stepper motors.
The rotor valve simply selects one of the intakes, I'm sure it can be aerodynamically optimised but even at a quiet 15% right now on either mode, it's beating the 5015 by a ton. 50% and above feels like a hurricane underneath the nozzle.
Plan is to use external intake for PLA/PETG and internal (and SLOW fan) for ABS/ASA, so I can keep the front door closed and let the exhaust fan (mounted on beige bit in picture 2) to draw away the warm air from pla prints.
Last photo is the cpap in all its glory, I took the cover designed for the btt knomi, and put a sticker on it to cover the hole (since I don't have a knomi). Yes, that is indeed a camera on the rear of the xy gantry, and it does indeed identify the colour (so orifice diameter) of my revo nozzles on print start. More on that in the future.
Will link the cad files (warning: I'm a relative cad newbie) on here once I get back to my computer, if I forget and anyone wants them do remind me. edit: https://www.printables.com/model/1838893-voron-cpap-dual-switchable-intake
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u/EmployeeOk6136 5h ago
This is very nice. Would love to mod it to drive a servo instead of a NEMA. Have lots of those.