Closed piontec closed 3 years ago
Hi! Can you provide your dc-dc module pictures or datasheet?
Please check photos of the converter I'm using
I would start by suggesting that it is best to always verify your output voltage is correct on a dc-dc converter before powering anything from it.
I think the enable pad can be left alone but I'm not 100%. I searched the internet and found a QS-1205CME-3A module that looks like those photos and the description of the enable pin suggests it is logic controlled with 0V for off and 2-5V for on. If not connected it likely has a pull-up resistor on the board to keep it enabled. I'm not sure why more voltage would have gone to the fan unless your connections were wrong.
Based off of the photos I would suggest:
GND should connect to -V of your printer power supply (either directly or where it connects to the Robin board) and black/ground/negative lead of fan.
IN+ should connect to +V of printer power supply (or where it connects to the printer).
VO+ should be connected to red positive lead of fan but verify the voltage first and adjust for 12V.
Hope this helps
I have the DCDC connected correctly, exactly as you described. And I measured the voltage to be 12V. Yet somehow when board switching kicks in, the output voltage is higher - I'm not really sure how's that possible...
@piontec The manufacturer may have relevant tutorials, you can consult.
I wanted to connect 12V fan for cooling the filament. I used a 12V Dc-DC converted in the same way as recommended for creality 4.2.2 board: I left the ground pin of filament cooling fan untouched, then inserted the DC-DC converted into +24V line and attached converter's ground directly to power supply gnd. Unfortunately, this resulted in my 12V fan still getting volatages much higher than 12V. How should I connect that?