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    Configure Cartesian Printer with dual z screw

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    • sscott1130undefined
      sscott1130
      last edited by

      I have a Cartesian printer with dual z screw on a duet 0.8.5. Right now I have them wired in series to the z stepper. If i want to control the 2 z screws with independent steppers for each z (one connected to the z stepper and one connected to the e1 stepper). would i use the following code in my config.g:

      M584 X0 Y1 Z2:3 U3 E4?

      Are there any other modifications i need to make to the config.g or other files?

      Any help is appreciated.

      Thanks

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      • SpeedyDadundefined
        SpeedyDad
        last edited by

        You need to configure the U motor just like the Z for things like micro stepping, steps/mm, etc.

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        • dc42undefined
          dc42 administrators
          last edited by

          You don't need to create a U axis unless you want to home them using separate homing switches. The recommended approach is now to just configure them as multiple Z drivers, for example M584 X0 Y1 Z2:3 E4. Then in firmware 1.19beta11 you can use your Z probe to level them, see https://duet3d.com/wiki/Bed_levelling_using_multiple_independent_Z_motors.

          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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          • W3DRKundefined
            W3DRK
            last edited by

            Perhaps I'm being thick, but how does one define X,Y coordinates for the Z motors on a moving bed printer like the Prusa i3?

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            • dc42undefined
              dc42 administrators
              last edited by

              Assuming you have one Z motor at either end of your X axis, that gives you the X coordinates. For the Y coordinates, use the mid point of the bed.

              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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