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Dead duet?

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Duet Hardware and wiring
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  • undefined
    dc42 administrators
    last edited by 30 Jul 2017, 18:15

    I'm not sure what you mean by the "left corner" - do you mean the bed heater LED or the E1 heater LED?

    See the note at https://duet3d.com/wiki/Mounting_and_cooling_the_board about not using metal washers.

    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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    • undefined
      MrBlom
      last edited by 30 Jul 2017, 18:18

      its E0 heat lead i think
      and im not using metal washer

      what can i do now to fix this

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      • undefined
        dc42 administrators
        last edited by 30 Jul 2017, 18:20

        If all the LEDs on the Duet are off, then no power is reaching the board. Either your PSU has stopped working, or the VIN terminal block screws are no longer tight, or something is shorting the PSU out.

        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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        • undefined
          MrBlom
          last edited by 30 Jul 2017, 18:24

          you have right again 🙂
          the psu dont provide 24v any more
          thank for the fast support !

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          • undefined
            MrBlom
            last edited by 30 Jul 2017, 19:29

            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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            • undefined
              MrBlom
              last edited by 31 Jul 2017, 18:51

              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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              • undefined
                dc42 administrators
                last edited by 31 Jul 2017, 21:06

                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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                • undefined
                  Cinpro
                  last edited by 28 Aug 2017, 00:18

                  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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                  • undefined
                    dc42 administrators
                    last edited by 28 Aug 2017, 06:20

                    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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                    • undefined
                      Cinpro
                      last edited by 28 Aug 2017, 13:49

                      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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                      • undefined
                        dc42 administrators
                        last edited by 28 Aug 2017, 18:45

                        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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