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    Short-to-ground on drivers

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    • dc42undefined
      dc42 administrators
      last edited by

      Email the details to info at Duet3D dot com.

      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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      • kingfisherundefined
        kingfisher
        last edited by

        OK??? New board has arrived (Thanks for the great customer support)

        But it might be user error (or the stepper motors?)

        I've, re wired the new board (Couldn't see any wiring issues).

        Then on the new board: Homing on all axis works but when I go to print the get a similar error?

        Error: Short-to-ground on drivers 4
        Error: Over temperature shutdown on drivers 4
        20:20:00Error: Short-to-ground on drivers 1
        Error: Over temperature shutdown on drivers 1
        20:19:43Error: Short-to-ground on drivers 4
        Error: Over temperature shutdown on drivers 4

        I don't get why homing and moving the motors by the interface works but as soon as i go to print this happens?

        This error started after months off error free printing??

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        • kingfisherundefined
          kingfisher
          last edited by

          Selected Config Lines if that helps:

          M584 X3 Y2 Z0:1 E4

          M906 X800 Y800 Z800 E300 I30

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          • kingfisherundefined
            kingfisher
            last edited by

            The machine Properties don't appear to match my config (Assuming I'm reading this correctly?):

            https://drive.google.com/file/d/1VZg7r0YN19Ev95qZ2SvOHdI4RbZNxuH7/view?usp=sharing

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            • dc42undefined
              dc42 administrators
              last edited by

              The error is being reported on driver 4 which you have configured as an extruder. That driver won't be enabled until you first do some extrusion or retraction. That's why it's not being reported until you start printing.

              Could it be that you have a short between one of the motor windings and the case of the motor?

              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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              • kingfisherundefined
                kingfisher
                last edited by

                Thanks, I'll change that motor tomorrow…
                BTW, I can heat it up and extrude manually.
                Everything works from the web interface?

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                • kingfisherundefined
                  kingfisher
                  last edited by

                  I'm now getting the error on driver 1 on a quick test before stopping for the night

                  22:48:53Error: Short-to-ground on drivers 1
                  Error: Over temperature shutdown on drivers 1
                  22:48:28Error: Short-to-ground on drivers 1
                  Error: Over temperature shutdown on drivers 1
                  22:47:56Error: Short-to-ground on drivers 1
                  Error: Over temperature shutdown on drivers 1

                  I'll triple check the wiring and look at swapping the motors tomorrow

                  Why would the manual movements and extrusion work but not during a print? (Looks like its not a duet fault, but Its driving me mad!)

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                  • deckingmanundefined
                    deckingman
                    last edited by

                    @kingfisher:

                    …................................
                    Why would the manual movements and extrusion work but not during a print? (Looks like its not a duet fault, but Its driving me mad!)

                    You have driver 1 mapped to Z so X Y and E moves don't use that driver but when you are printing, there will be Z movement. Have you tried a manual Z move?

                    Ian
                    https://somei3deas.wordpress.com/
                    https://www.youtube.com/@deckingman

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                    • dc42undefined
                      dc42 administrators
                      last edited by

                      @kingfisher:

                      OK??? New board has arrived (Thanks for the great customer support)

                      But it might be user error (or the stepper motors?)

                      I've, re wired the new board (Couldn't see any wiring issues).

                      Then on the new board: Homing on all axis works but when I go to print the get a similar error?

                      Error: Short-to-ground on drivers 4
                      Error: Over temperature shutdown on drivers 4
                      20:20:00Error: Short-to-ground on drivers 1
                      Error: Over temperature shutdown on drivers 1
                      20:19:43Error: Short-to-ground on drivers 4
                      Error: Over temperature shutdown on drivers 4

                      I don't get why homing and moving the motors by the interface works but as soon as i go to print this happens?

                      This error started after months off error free printing??

                      Do you have anything connected to the Duet expansion connector?

                      What power supply voltage are you using?

                      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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                      • kingfisherundefined
                        kingfisher
                        last edited by

                        @deckingman:

                        @kingfisher:

                        …................................
                        Why would the manual movements and extrusion work but not during a print? (Looks like its not a duet fault, but Its driving me mad!)

                        You have driver 1 mapped to Z so X Y and E moves don't use that driver but when you are printing, there will be Z movement. Have you tried a manual Z move?

                        Yes Z moves fine with the Web GUI. I can even do the full bed compensation routine, but the short-to-ground error happens as soon as I try to print.

                        Current thoughts are around issues with the stepper motors
                        Will switch the Z back to one driver
                        Tripple check the wiring
                        Then look at swapping the steppers out

                        Other thoughts include the PSU, when monitoring the compensation routine late last night the voltage dropped to 11v at one point (I've not noticed it fluctuate before)

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                        • dc42undefined
                          dc42 administrators
                          last edited by

                          Yes it could be the PSU. The stepper drivers shut down if the voltage falls below about 10V. Please run M122 and see what the count of "Under voltage events" is. Note, this counter is reset to zero after you run M122.

                          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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                          • kingfisherundefined
                            kingfisher
                            last edited by

                            Thanks - I'll move the PSU test up the list. (I've got a spare I can swap over easily tonight)
                            It might encourage me to make the 24v switch I've been planning for a while…
                            (Thanks again for the continued support)

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                            • Kulitorumundefined
                              Kulitorum
                              last edited by

                              I am getting the same with 20beta1, looks like false errors to me.

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                              • kingfisherundefined
                                kingfisher
                                last edited by

                                Think I've got a different issue (Prob a hardware related diagnosis now?)
                                I can't print, the stepper motor go haywire when a print starts.
                                I'll undertake tests this evening, but my money is on the PSU.
                                Nothing changed in my set up - I finished a 4 hour print, tried to start another and the errors started (The PSU is now the most likely cause)

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                                • dc42undefined
                                  dc42 administrators
                                  last edited by

                                  @Kulitorum:

                                  I am getting the same with 20beta1, looks like false errors to me.

                                  Please try beta 6 - the driver monitoring code works differently now.

                                  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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                                  • kingfisherundefined
                                    kingfisher
                                    last edited by

                                    Swapped the PSU (taken out a 30A/300W and temporarily replaced by a 17A/200W I had spare)

                                    The Vin is stable in the new PSU (It was fluctuating in the old one) and a test print is running fine.

                                    Thanks for the help diagnosing the issue (And the great customer support from think3dprint3d)

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                                    • kingfisherundefined
                                      kingfisher
                                      last edited by

                                      Sorted.
                                      A new 400W PSU has been installed and my short to ground errors appear to have vanished 🙂
                                      DC, thanks for helping locate the issue and solve the problem.

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