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    Microstepping with "dumb" external stepper driver?

    Tuning and tweaking
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    • jlmoreno
      jlmoreno last edited by jlmoreno

      How would microstepping be set with a "dumb" external pololu or stepstick type driver?

      Is it still done with M350, or do I need to use the MS1,MS2,MS3 inputs on the driver pcb?

      what happpens if, for example, the driver is set up for x16 microstepping on the board, but x64 with M350?

      dc42 1 Reply Last reply Reply Quote 0
      • A Former User
        A Former User last edited by A Former User

        You'll need to set them both, and matching; if you set x64 microseteps in M350 an x16 on the driver it will move 4mm for every 1mm you want it to move.

        Ofc RRF is smarter than that; ref dc42 👇

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        • dc42
          dc42 administrators @jlmoreno last edited by

          @jlmoreno said in Microstepping with "dumb" external stepper driver?:

          How would microstepping be set with a "dumb" external pololu or stepstick type driver?

          Is it still done with M350, or do I need to use the MS1,MS2,MS3 inputs on the driver pcb?

          what happpens if, for example, the driver is set up for x16 microstepping on the board, but x64 with M350?

          The Duet doesn't know what microstepping your external driver uses. So just set the external driver to the microstepping you want, then in config.g set the steps/mm in M92 to be correct for that microstepping.

          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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          • A Former User
            A Former User last edited by

            @dc42 so is it only if you change the microstepping after setting steps/mm you can run into interesting situations with such a setup?

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

              @bearer said in Microstepping with "dumb" external stepper driver?:

              @dc42 so is it only if you change the microstepping after setting steps/mm you can run into interesting situations with such a setup?

              I think you will find that RRF doesn't let you change the microstepping on a dumb driver.

              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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              • jlmoreno
                jlmoreno last edited by

                Awesome, i'll give it a shot. Thanks!

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