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tsp42

UMO replacement for electronics cooling fan

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I was wondering if anyone has tried replacing the electronics cooling fan on the original ultimaker with a standard 12V 120mm fan blowing directly on the pcb (no wodden cover)? I going to replace both the stepper drivers with the silent stepper driver and the 12V voltage regulator so less cooling should be needed.

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well actually the SilentStepSticks are rather expensive

However, you should just go ahead... I also got really tired of the sucky std. fan and replaced the cover with a printed one that holds 2 x 50 mm. fans from fractal design... It works a treat, and along with the sss drivers makes the printer super silent... that is, until my new cross flow fan kicks in an sends the printer flying

Edited by Guest

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Thanks for the feedback. Will give it a try when I get the time to do it. The TMC2100 chip on the SilentStepSticks fortunately has a overtemperature detection so they should turn off before being cooked. Not sure if there are other hotspots on the PCB (besides the voltage regulator)?

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It only took 1½ year but I finally replaced the fan, power supply and added a heated bed (JasonK mk 2) to my UMO. The frame is a slightly modified version of the template from formfabrik. The fan is an old 12V Papst 4412 FGL 120 mm fan (55 CFM so plenty of air). The power supply is a 24 V 15 A Chinese no-name PSU adjusted down to 21.1 V. I intent to replace it with a Mean Well SP-480-24 PSU (20A). I used a 5A step down buck module to replace the 12 V regulator and feed the fan. I used the ARD PWR jumper to bypass the 7812 regulator. 5a3325af46a8e_2016-12-3012_38_02.thumb.jpg.507c3f17898778a36070e84836bfec97.jpg5a3325af8a9fd_2016-12-3012_38_23.thumb.jpg.784fc134532bf246655475ef0ad75124.jpg.

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