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    Z Axis 2 Parallel Motors Synchronization

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    • deckingmanundefined
      deckingman
      last edited by

      @jaydevdave:

      Duet's X Y Z Motor Drivers and its capacity is same or different ?

      The driver chips are the same for all axes.

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

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      • jaydevdaveundefined
        jaydevdave
        last edited by

        Even on no-load condition, the two Z motors are not able to generate sufficient torque. Rated current being 1.5A with a torque of 5.5kg/cm2 and using 24V supply. What could be the reason for it? And what could be the solution for the same? Should I increase supply voltage or should use Motors with higher rated current?
        Please find the link to the video wherein no-load condition the z motors are not generating proper torque.

        https://drive.google.com/open?id=1I50zJb8WMD2IF8rmksil2842Gv6Ds2Q4

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        • deckingmanundefined
          deckingman
          last edited by

          No doubt David will be along soon but from that video I'd say there has to be something wrong with either one of the motors or the wiring.

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

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          • jaydevdaveundefined
            jaydevdave
            last edited by

            The same motors run when connected on X and Y axis respectively and that too with high speed of 100mm per second.

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            • dc42undefined
              dc42 administrators
              last edited by

              @jaydevdave:

              What is the maximum speed at which my printer can run, having stepper motors (1.5A current), torque 5.5kg/cm2 and using external power supply 24V?

              See the link that I posted in my previous reply for how to calculate this.

              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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              • dc42undefined
                dc42 administrators
                last edited by

                @jaydevdave:

                Duet's X Y Z Motor Drivers and its capacity is same or different ?

                All the same.

                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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                • jaydevdaveundefined
                  jaydevdave
                  last edited by

                  The same motors run when connected on X and Y axis respectively and that too with high speed of 100mm per second. why so?

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                  • dc42undefined
                    dc42 administrators
                    last edited by

                    @jaydevdave:

                    The same motors run when connected on X and Y axis respectively and that too with high speed of 100mm per second.

                    The maximum speed achievable is lower when you have two motors wired in series. But why are you trying to run your Z axis at 100mm/sec? Z doesn't need to move fast.

                    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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                    • jaydevdaveundefined
                      jaydevdave
                      last edited by

                      We having two Y motors which have been swapped with the Z axis. So Two Y motors being connected at the Z axis and we need the speed of 100mm/sec.
                      Stepper motors Rating 1.5A
                      Power supply 24V.
                      How can it be achieved?

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                      • dc42undefined
                        dc42 administrators
                        last edited by

                        Try connecting them in parallel to just 1 of the connectors instead of in series using both connectors, and setting the current to 2A.

                        EDIT: alternatively, if you have any spare motor driver outputs left, connect them to separate outputs, use M584 to tell the firmware to drive both together, and use the existing current setting.

                        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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                        • jaydevdaveundefined
                          jaydevdave
                          last edited by

                          Driving both the motors from a single connection(parallel) instead of two is safe? I hope it won't burn out the driver right?

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                          • jaydevdaveundefined
                            jaydevdave
                            last edited by

                            We having two Y motors which have been swapped with the Z axis. So Two Y motors being connected at the Z axis and we need the speed of 100mm/sec.
                            Tried what dc42 mentioned in the previous comments. We do not have extra driver nor it is working in parallel connection.
                            Should we increase the power supply or should I use 3A rated stepper motors?

                            Current motor having rating of 1.5A
                            Torque 5.5kg/cm2
                            Power supply 24V.

                            How to do it?

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                            • dc42undefined
                              dc42 administrators
                              last edited by

                              Like I said, connect them in parallel to a single stepper motor output, and try 2A current. The drivers are current-limited so it is safe.

                              What is the steps/mm for that axis?

                              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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                              • jaydevdaveundefined
                                jaydevdave
                                last edited by

                                Alright

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                                • jaydevdaveundefined
                                  jaydevdave
                                  last edited by

                                  Can we set motor current to 3A in config ?

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                                  • elmoretundefined
                                    elmoret
                                    last edited by

                                    @jaydevdave:

                                    Can we set motor current to 3A in config ?

                                    Have you read the documentation?

                                    https://www.duet3d.com/wiki/Choosing_stepper_motors

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