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    Manual stealthcChop2 parameters

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    Tuning and tweaking
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    • KP0005undefined
      KP0005
      last edited by KP0005

      Is there a way to enter stealthChop2 parameters manually, instead of making the drivers figure them out while homing?

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      • Vetiundefined
        Veti
        last edited by

        yes. see
        https://duet3d.dozuki.com/Wiki/Gcode#Section_M569_Set_motor_driver_direction_enable_polarity_and_step_pulse_timing

        KP0005undefined 1 Reply Last reply Reply Quote 0
        • KP0005undefined
          KP0005 @Veti
          last edited by

          @Veti So that would be the T parameter? I thought T was changing the STEP/DIR interface.

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          • Vetiundefined
            Veti
            last edited by

            what do you want to change? there are several, not just one.

            KP0005undefined 1 Reply Last reply Reply Quote 0
            • KP0005undefined
              KP0005 @Veti
              last edited by KP0005

              @Veti well C, F and Y are for configuring Spreadcycle from what I understand of the datasheet, H and V are for changing the speed where the driver switches from stealthChop to SpreadCycle; D, P, R and S are for setting driver mode of operation, driver number, enable signal and direction. I don't see any other options for stealthChop in there.

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              • KP0005undefined
                KP0005
                last edited by

                that leaves B and T

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                • Vetiundefined
                  Veti
                  last edited by

                  again, what do you want to change?

                  KP0005undefined 1 Reply Last reply Reply Quote 0
                  • KP0005undefined
                    KP0005 @Veti
                    last edited by

                    @Veti According to the datasheet, the stealthchop2 settings are generated at first motor movement. I'd like to configure them via uart at boot so I don't have to worry about the first movement of the extruder not being fast enough to use peak current and generate correct settings.

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                    • Vetiundefined
                      Veti
                      last edited by

                      so you are looking for the c parameter. and that register is not only spreadcycle
                      see
                      https://www.trinamic.com/fileadmin/assets/Products/ICs_Documents/TMC220x_TMC2224_datasheet_Rev1.09.pdf
                      page 29.

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