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    Extruder motor stops during print…

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    • ofloveandhateundefined
      ofloveandhate
      last edited by

      i have already tried E1, another motor (thanks brad, sorry it didn't fix the problem), and another duet board. no avail, all still produced failure. currently using my wireless duet, the ethernet is in its box.

      i have tried firmwares 1.18, 1.19.2, and 1.20. happy to upgrade if that's a recommendation.

      i will try the grounding idea. that means the chassis of the printer must be grounded, too, eh. can you indicate how i should ground it? through the power supply? wire to a screw on the wall plug? is there a ground on the board i can tie in to? how should i attach the grounding wire to the motor? i'm not an electrical engineer, need help, please.

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      • ofloveandhateundefined
        ofloveandhate
        last edited by

        it is insufficient to run

        M350 I1
        
        ```to restore extruder functionality. running that command caused this to output:
        

        M350 I1
        Microstepping - X:64, Y:64, Z:64, E:16:16(on):16:16:16:16:16:16:16

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        • dc42undefined
          dc42 administrators
          last edited by

          @ofloveandhate:

          i have already tried E1, another motor (thanks brad, sorry it didn't fix the problem), and another duet board. no avail, all still produced failure. currently using my wireless duet, the ethernet is in its box.

          i have tried firmwares 1.18, 1.19.2, and 1.20. happy to upgrade if that's a recommendation.

          i will try the grounding idea. that means the chassis of the printer must be grounded, too, eh. can you indicate how i should ground it? through the power supply? wire to a screw on the wall plug? is there a ground on the board i can tie in to? how should i attach the grounding wire to the motor? i'm not an electrical engineer, need help, please.

          What I do is:

          1. Link the Ground terminal on the mains input end of the PSU terminals not only to mains ground but also to the V- output on the PSU terminals;
          2. Connect the metal parts of the printer to mains ground/V- too.

          My printer has an AC mains voltage bed heater, so grounding is important for safety reasons.

          The green/yellow wires are ground (standard European colours).

          What I find really puzzling is that nobody else has reported any similar problems. Normally that would point to a hardware problem; but you have already changed most of the hardware.

          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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          • ofloveandhateundefined
            ofloveandhate
            last edited by

            What I find really puzzling is that nobody else has reported any similar problems. Normally that would point to a hardware problem; but you have already changed most of the hardware.

            i know, right!?!?!?! i am baffled, too. but, i am persistent, and i will solve this problem.

            thanks 2000lbs for the grounding tips. i'll get to it later in the week (maybe thurs?), and post back results after another print. i am also waiting on a loaner UPS from across campus.

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            • ofloveandhateundefined
              ofloveandhate
              last edited by

              the body of the motor is aluminum, and won't take solder. tips on how to ground the extruder motor in the face of this challenge?

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              • ofloveandhateundefined
                ofloveandhate
                last edited by

                i mechanically connected the grounding wire to the extruder motor body by stuffing the wire under the heat sink. it causes the heat sink to not connect as well, but it makes the ground connection, so oh well – i'll continue to think about how to have both at the same time. i did not yet ground the rest of the machine, the wiring is stock (as the build manual specifies).

                since i grounded the extruder motor, i have had 6 successful medium-size prints (10-14 hours each), and no failures across all prints regardless of size, over about 70 hours of printing. this includes previously problematic gcode for tobel_norobust, which i have printed successfully twice now.

                did the grounding solve the problem? so far, it looks like yes. but, it only takes one more failure to disqualify it as the solution. i do hope that it is the solution!

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                • dc42undefined
                  dc42 administrators
                  last edited by

                  @ofloveandhate:

                  the body of the motor is aluminum, and won't take solder. tips on how to ground the extruder motor in the face of this challenge?

                  Remove one the mounting screws from the front or one of the assembly screws from the rear, and refit it with a solder tag or crimp eyelet under the head, with a wire already attached.

                  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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                  • Kezatundefined
                    Kezat
                    last edited by

                    @ofloveandhate:

                    did the grounding solve the problem? so far, it looks like yes. but, it only takes one more failure to disqualify it as the solution. i do hope that it is the solution!

                    That is exciting i do hope that solves the issue, seems like a simple solution if that is the case.
                    Looks like the extruder and spool are well isolated from the frame, so it does seem logical that you could have a large static charge building up have then discharging down the stepper motor wires resetting the stepper driver. Is that a PVC pipe the spool is on? I wonder if that is helping things build up a charge.

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                    • ofloveandhateundefined
                      ofloveandhate
                      last edited by

                      Is that a PVC pipe the spool is on? I wonder if that is helping things build up a charge.

                      i'm pretty sure it's pvc

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                      • ofloveandhateundefined
                        ofloveandhate
                        last edited by

                        OP here, posting back about 1.5 months later. since adding the grounding wire, the problem is solved. i have logged hundreds of hours of printing with no failures. thanks to everyone for their help and patience.

                        dc42undefined 1 Reply Last reply Reply Quote 1
                        • dc42undefined
                          dc42 administrators @ofloveandhate
                          last edited by

                          @ofloveandhate, thanks for letting us know.

                          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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