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    [M350] microsteps for external drivers

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    • o_lampeundefined
      o_lampe
      last edited by o_lampe

      I'm driving some external TMC2225 drivers from the expansion header of a Duet2.
      They run in standalone mode and are jumpered to 1/32 microstepping.

      How should I set M350 and M92 for these drivers? I can't set them to 'fullsteps' , since RRF seems to think they are TMC2660.
      I've set them to 1/32 and adjusted M92 accordingly.

      I'm afraid RRF will try to talk over SPI to them and freeze.
      How can I tell RRF these are external drivers? The wiki about the expansion breakout board doesn't mention anything about microsteps.

      One more thing: the motors run fine, but they ignore M84 and M18. They are always enabled...
      Enable polarity is same as TMC2660 (M569 P5 R0 T5:5:5:5)

      dc42undefined 1 Reply Last reply Reply Quote 0
      • o_lampeundefined o_lampe marked this topic as a question
      • o_lampeundefined
        o_lampe
        last edited by

        I could sort out the enable problem, but the main question is still: how do I tell RRF, these drivers are not TMC2660?

        PCRundefined 1 Reply Last reply Reply Quote 0
        • PCRundefined
          PCR @o_lampe
          last edited by

          @o_lampe with my CNC i not used any M350 command. only the M92 for configure of the Steps 😉

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          • dc42undefined
            dc42 administrators @o_lampe
            last edited by

            @o_lampe assuming that you don't have a DueX connected to the Duet, RRF will know that they are not TMC2660 drivers. Just configure the microsteps/mm value in M92.

            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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            • o_lampeundefined o_lampe marked this topic as a regular topic
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