3DPrinting
3DPrinting is a place where makers of all skill levels and walks of life can learn about and discuss 3D printing and development of 3D printed parts and devices.
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Ok, let's look into it. (you can also send me your printer.cfg if you want) The Mini e3 v3 has the following switchable outputs:
Keep in mind that they all switch ground only. 24V is always there.
You can use all of them for whatever you want, Klipper is very flexible here. HB is your heated bed, no questions here. E0 should be connected to your Hotted board HE0. I don't know which of the fans on your board does what, you may need to connect them all and see which one does what (I guess your hotend does not have 3 fans). in the end you want [hotend_fan] to be the one calling the hotend (not the part!). the [fan] will be controlled by the slicer (overhangs, bridges and so on).
DCIN on your board should ideally be connected directly to the PSU, you do not want it to be switched.
don't worry, we will get you back printing.