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    Solved Can I use a single GND connection to the hotend?

    Duet Hardware and wiring
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    • fho
      fho last edited by fho

      I am in the process of wiring up a machine and just to save some cabling I was thinking to run a single GND wire. Technically there should not be any difference and if I connect it to the heater GND it should be able to handle the increased current. I use 20 AWG wire.

      The only reason I could think of is if there is some measuring circuitry on the GND legs?

      A Former User 1 Reply Last reply Reply Quote 0
      • A Former User
        A Former User @fho last edited by

        @fho said in Can I use a single GND connection to the hotend?:

        heater GND

        heater gnd is where the switching is done, so unless you want to switch everything when the heater does, then no. (you dont)

        fho 2 Replies Last reply Reply Quote 1
        • fho
          fho @Guest last edited by

          @bearer makes sense. More ground cables it is then

          1 Reply Last reply Reply Quote 0
          • fho
            fho @Guest last edited by

            @bearer Looking at the schematic the fans are all powered from V_FAN ... at least there it should be possible to use a single wire on the positive connection?

            1 Reply Last reply Reply Quote 0
            • bondus
              bondus last edited by

              Fans and heaters are switched on the ground side. But you can have one common supply cable, ie, 24V or whatever you got. If you use a special supply for the fans they would need their own cable.

              1 Reply Last reply Reply Quote 1
              • fho
                fho last edited by

                No idea how to mark this as solved. But ... solved. Thanks.

                A Former User 1 Reply Last reply Reply Quote 0
                • A Former User
                  A Former User @fho last edited by

                  @fho said in Can I use a single GND connection to the hotend?:

                  mark this as solved

                  https://forum.duet3d.com/topic/7773/forum-feature-mark-as-question-solved

                  1 Reply Last reply Reply Quote 0
                  • fho
                    fho last edited by

                    Those options do not exist for me 🤷
                    https://imgur.com/a/hwY3EUN

                    1 Reply Last reply Reply Quote 0
                    • Phaedrux
                      Phaedrux Moderator last edited by

                      Your photo shows Ask as Question. Choose that first and then the option mark as solved will show up.

                      Z-Bot CoreXY Build | Thingiverse Profile

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                      • A Former User
                        A Former User last edited by A Former User

                        its also only available for the top post afaik

                        nope, just follow the two step instructions.

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                        • fho
                          fho last edited by

                          Ok ... that makes sense 👍

                          1 Reply Last reply Reply Quote 0
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