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    Linear rail axis vibrates a lot with duet 2 wifi (v1.04)

    Duet Hardware and wiring
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    • johny
      johny last edited by

      Hello,
      I am building a printer with linear rails and duet wifi.
      I am using 2A motors (17HS16-2004S1).
      When configuring i setup the current for 950ma and X16 micro stepping with interpolation and the axis vibrates a lot; if i increase the current the vibration rises when I start to lower the current the vibration is reduced. Only at 500 ma, the vibration gets into a point that is acceptable. should i be using 80% of the motor current like 1600ma? what am i doing wrong?
      Thank you

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      • johny
        johny last edited by

        Just a small note, i am using 12V PSU.
        Thank you

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        • dc42
          dc42 administrators last edited by dc42

          Does this vibration happen when you command movement around a particular speed? If so, my guess is that you are hitting a resonance at that speed, either mid-band resonance of the motor, or resonance of the frame.

          If it's only only one of the motors causing vibration, that can be caused by a partially-failed stepper driver.

          Another possible cause is trying to move the motors too fast for the supply voltage. As you are using 1.8deg motors, I don't think this is very likely; but you should check whether the supply voltage is adequate for that speed using the motor EMF calculator at https://www.reprapfirmware.org/.

          I suggest you run those motors at between 1.3A and 1.6A.

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          • johny
            johny last edited by

            @dc42 said in Linear rail axis vibrates a lot with duet 2 wifi (v1.04):

            adequate

            Hello, Vibration happen when i move the axis in the dashboard buttons i guess standard speed. I already changed the stepper (plugged on a different) and changed motors as well; i can only reduce the noise when i change 906 to 500ma

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            • johny
              johny last edited by johny

              The noise using 1250 ma
              In the end i loose the belts the the noise is reduced

              dc42 1 Reply Last reply Reply Quote 0
              • dc42
                dc42 administrators @johny last edited by

                @johny said in Linear rail axis vibrates a lot with duet 2 wifi (v1.04):

                The noise using 1250 ma
                In the end i loose the belts the the noise is reduced

                Sounds like a resonance then.

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                • johny
                  johny last edited by

                  Hello,
                  It was a small gap in the linear rails that made the resonance! changed the rails and no noise!
                  Thank you

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