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    Fan Headers Not working

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    Duet Hardware and wiring
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    • Phaedruxundefined
      Phaedrux Moderator
      last edited by

      It can be a bit tight, but if you use pliers you can wiggle it back and forth a bit too loosen it up. Alternatively you can print a fuse puller if you have a working 3d printer that might make it a bit easier.

      Take your time and it will wiggle loose.

      Z-Bot CoreXY Build | Thingiverse Profile

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      • bdeliaundefined
        bdelia
        last edited by

        @Phaedrux , I was able to safely remove the fuse. It is in good working order, the metal on the inside looks like new and there is continuity when tested with a multimeter.

        How did the config look to you?

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        • Vetiundefined
          Veti
          last edited by

          post a picture of the wiring of the fans being connected to the duet

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          • bdeliaundefined
            bdelia @Veti
            last edited by bdelia

            Here you go, I did double and triple check the polarity...I have only tried connecting the heatsink fan at this point. That fan is part of my hemera extruder/hotend and is supposed to be 24V. I have also tried connecting two other 24V fans I have that I know work in another printer and they are also not working on any of the Fan ports, including the Always On ports.

            DuetFanWiring.jpg

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            • Phaedruxundefined
              Phaedrux Moderator
              last edited by

              Does the fan work if connected directly to VIN and ground on the PSU?

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              • Phaedruxundefined
                Phaedrux Moderator
                last edited by

                Can you measure the voltage across the VIN pin of the VFAN jumper block and ground? Careful not to slip.

                Z-Bot CoreXY Build | Thingiverse Profile

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                • bdeliaundefined
                  bdelia
                  last edited by

                  @Phaedrux , I have not tried wiring the fans directly to VIN and GND. But I know several fans that work in another printer do not work on this Duet board.

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                  • bdeliaundefined
                    bdelia @Phaedrux
                    last edited by

                    @Phaedrux said in Fan Headers Not working:

                    Can you measure the voltage across the VIN pin of the VFAN jumper block and ground? Careful not to slip.

                    To confirm, when I do that should the jumper be in place or not in place?

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                    • Phaedruxundefined
                      Phaedrux Moderator
                      last edited by

                      Alright, just want to make sure the fan isn't the problem.

                      Doesn't matter if the jumper is on or not really as long as you can poke the metal. Probably easier with it off. Just want to see if there is any voltage coming to the pin.

                      Z-Bot CoreXY Build | Thingiverse Profile

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                      • bdeliaundefined
                        bdelia @Phaedrux
                        last edited by

                        @Phaedrux said in Fan Headers Not working:

                        Alright, just want to make sure the fan isn't the problem.

                        Doesn't matter if the jumper is on or not really as long as you can poke the metal. Probably easier with it off. Just want to see if there is any voltage coming to the pin.

                        Ok, was able to test for voltage and I am not seeing anything on the multimeter.

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                        • Phaedruxundefined
                          Phaedrux Moderator
                          last edited by

                          Weird. And you're sure the fan fuse is intact? Did you pull the one with the 1 on it?

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                          • bdeliaundefined
                            bdelia @Phaedrux
                            last edited by bdelia

                            @Phaedrux I just double checked and you were right, I checked the Bed fuse the first time. The fuse with labeled 1 on it does not have continuity. So I assume if I replace that fuse that may solve my issues? Thoughts?

                            I am heading out for a drive with my wife, I will stop by an automotive supply store and see if they sell 1A mini auto blade fuses. I read on the forum somewhere that you can go up to 2 or 3 amp fuses as well for the fans. Can you confirm that in case I cannot find 1Amp fuses lcoally?

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                            • Phaedruxundefined
                              Phaedrux Moderator
                              last edited by

                              Ok, that makes more sense. Yes replacing that fuse should get you sorted. Automotive parts store is the best bet. Motorcycle shop. That kind of thing. Using a larger fuse would work, just means that it would take longer to blow if there was a short.

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                              • bdeliaundefined
                                bdelia @Phaedrux
                                last edited by

                                @Phaedrux Thanks for all of your help. I was really hoping it was not a major break in the board and I will report back to this thread once i find a new fuse for the fans.

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                                • bdeliaundefined
                                  bdelia
                                  last edited by

                                  @Phaedrux I swapped in a 2A fuse and my heat sink fan is now working. Thank you very much for all of the help. I will source the 1A fuse but at least I am running now.

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                                  • Phaedruxundefined
                                    Phaedrux Moderator
                                    last edited by

                                    Good to hear.

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