- October 6, 2016 at 6:32 am #19027
I recently installed a 30A 12V LED power supply to my printer so I can add a heated bed.
It has the annoying habit of switching the fan on full every time current draw reaches a certain threshold.
At the moment, with only the steppers and the hot end drawing power it’s coming on and off every few seconds.
Anyone else have this?October 6, 2016 at 7:29 am #19032
I know the power supply that runs my 3d printer will cycle the internal fan when the heated bed is running, so it’s normal.October 6, 2016 at 3:39 pm #19064
Fair enough, thanks. Hmm, maybe I’ll try a PC PSU mod – the noise is quite annoying.October 6, 2016 at 8:00 pm #19075
It should just be a very slight fan noise, if you are hearing something else maybe its rubbing on something in there. Unplug it and open it up.October 7, 2016 at 1:49 am #19085
I might resort to that. Perhaps try a replacement higher quality fan.October 7, 2016 at 3:50 pm #19115
Yeah those things are loud the one I had on my 3D printer was very loud too. I opened it and the fan said it took a weird voltage like 16 volts so I didn’t try and replace the fan. I modded a corsair atx power supply and to use and it is silent. I ended up using the LED strip power supply on the MPCNC which I only use as a router outside so fan noise isn’t an issue.
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