Snapmaker U1 Purifier Fan, 150 x 150 mm Filter, and PWM Controller for PoPCap Lid
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A fan addition for Biqu PopCap lid, adds air filtering and temperature controlled cooling.
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- Printables
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- Other Printer Parts & Upgrades
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- Creative Commons — Attribution
Models use a 90 x 38mm 4-wire box fan, to provide controlled cooling of Snapmaker U1 top. Several parts are involved, the largest adapts the fan to a common 150 x 150 x 10 mm filter. Fan gaskets made from TPU seal fan, however printing one in PLA serves as a template for cutting fan opening, and mounting holes. Other parts include filter retainer, and enclosure parts for YR-1001 4-wire PWM fan controller. Controller is nice, it includes NTC sensor, and has many settings for temperature and PWM. A 12V power adapter is used to power controller and fan.
The 6-pin connector is a Molex mini-fit 3.0. I found a kit of 2 male and female with terminals on Amazon. Only ground and +24V wires are connected. Klipper Printer.cfg is modified by commenting out [purifier] macro and adding macro for output_pin, that controls PE15, the pin that enables 24V. I have included a picture for that. It is then possible to turn on 24V via Fluidd, or gcode. Buck-Boost is 4A XL6009 from Amazon. Set output voltage to 12V using a voltmeter. Only then connect fan controller and fan. I used a 24V adapter and bench tested controller fan and got familiar with button presses for settings, and controller. There are YT videos, some instructions. I found controller on ebay.
Instead of using original PopCap lid plexiglass 14" x 11" x 1/8 (3mm)" was purchased along with 5 x 2 mm magnets to fabricate lid for mod. Keep protective film on for marking and scratch protection. A drill and jigsaw were used to make mounting holes for magnets and fan. Use a few drops of dish soap, as blade and bit lubricant. Magnets were set in PopCap, then cut plexiglass placed over to mark magnet positions with sharpie. 4.8 mm holes drilled only 2 mm depths, with 1mm hole in undrilled top side, for super glue application. Magnets held on other side with masking tape, to hold flush and not leak glue. When installing magnets, pay special attention to polarity. I placed magnets in PopCap then did one at a time with lid and tape. Do with PopCap off U1, to avoid risk of magnet getting lost in U1.
Magnets, controller, and plexiglass found in Amazon.