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    Hot stepper when idle

    Tuning and tweaking
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    • Adamfilip
      Adamfilip last edited by

      I am using external DQ542MA stepper driver, via the expansion board on duetwifi

      I was doing some test then let the setup.. sit for an hour and noticed that the stepper was hot.. sitting idle.

      Currently i have M84 S30 set

      so it should disable after 30seconds..? but it was still holding position
      i dont use M906 as its an external driver

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      • dc42
        dc42 administrators last edited by

        The problem with disabling stepper motors when idle is that when you re-enable them, they may jump by 4 full steps in either direction. That's why in RRF there is no default disabling of drivers, instead we reduce the motor current. Your external drivers may have this facility too, it's called "standstill current reduction".

        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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        • Adamfilip
          Adamfilip last edited by

          yes there is a switch on the stepper driver to reduce current by 70% when idle, it is already enabled though

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