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    Dead duet?

    Scheduled Pinned Locked Moved
    Duet Hardware and wiring
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    • MrBlomundefined
      MrBlom
      last edited by

      one of the v+ port has gone bad on the psu
      the other works finne now
      duet is up and runing again
      thanks again!

      hopfully this is the end for all my problems for now 🙂

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      • MrBlomundefined
        MrBlom
        last edited by

        how bad is this ?
        Supply voltage: min 20.8, current 23.7, max 24.5, under voltage events: 0, over voltage events: 0

        do i need to get a new psu ?

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        • dc42undefined
          dc42 administrators
          last edited by

          You might want to measure the voltage with the bed heater fully on and with it off.

          Duet WiFi hardware designer and firmware engineer
          Please do not ask me for Duet support via PM or email, use the forum
          http://www.escher3d.com, https://miscsolutions.wordpress.com

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          • Cinproundefined
            Cinpro
            last edited by

            DC42 I think this may be what has happened to meas well. I got a reading of 1.4-1.7 ohms from the VSSA to GRD, too low? I have 2000c on the hot end connections, but the bed reads normal room temp.

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            • dc42undefined
              dc42 administrators
              last edited by

              Check your M305 P1 parameters. If they are correct at least approximately, then a reading of 2000c on a thermistor channel normally means you have a shorted thermistor, or a short between the thermistor and ground.

              Duet WiFi hardware designer and firmware engineer
              Please do not ask me for Duet support via PM or email, use the forum
              http://www.escher3d.com, https://miscsolutions.wordpress.com

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              • Cinproundefined
                Cinpro
                last edited by

                The line is set up for the E3D thermistor, double checked it to be sure it still the way it has been. all the VSSA read the same with a meter, However when I plug the hot end on to the bed slot it reads normally. I found the Wiki page on the fuse: https://duet3d.com/wiki/Connector_and_spare_part_numbers#VSSA_fuse

                I know I could solder the fuse like in the picture. the side with the resistor would be a problem for me going to the endstop ground. My hand wiggles on a good day, and shakes on the not so good ones. those terminals are pretty close together. I think I end up making a mess of things. I looking for someone who could do the work for me with the proper tools. Could that ground go to a different spot ( or is that just the closest. place)

                I found one of the part numbers for the fuse, there are a lot of resistors on there that are all 10k is this one acceptable or is there another one they carry that would be better in your opinion?

                https://www.digikey.com/product-detail/en/stackpole-electronics-inc/CF14JT10K0/CF14JT10K0CT-ND/1830374

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                • dc42undefined
                  dc42 administrators
                  last edited by

                  Yes that 10K resistor is fine. Or you can leave it out, but then the firmware won't tell you if you get another VSSA short.

                  Duet WiFi hardware designer and firmware engineer
                  Please do not ask me for Duet support via PM or email, use the forum
                  http://www.escher3d.com, https://miscsolutions.wordpress.com

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