Fan Control, no Ground for Fans



  • Hey guys,
    just a quick question. I build a delta style printer and the Fans (Hot End cooling fan and part cooling fan) are mounted on the effector. To spare wires to the effector I use one ground cable for the fans (and other stuff), that is why I only connected the Fans to V_Fan.

    I guess that is why I can't control the fans. Because those are just 2pin fans, is it possible to connect it to Fan0- or does this damage the fan/board/both (as stated in the wiki).
    I guess not, but is there a work-around possible?

    Why is the PWM done with ground and not V_FAN?

    I hope my inquiry makes sense


  • administrators

    @taconite said in Fan Control, no Ground for Fans:

    Why is the PWM done with ground and not V_FAN?

    Because it's easier. All 3D printer control boards do it this way.

    You can use a common positive wire for all the fans and also for the hot end heater, as long as they are all the same voltage.


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