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    prints coming out slightly too small delta printer

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    • dmkmediaundefined
      dmkmedia
      last edited by

      I did a test print of a 20mm cube and it was 20 mm but when I go bigger a 150 mm circle is 145mm

      I'm seeing all kinds of size problems but they are only a few mm out
      how can i sort this out

      my stepper motors are

      Product Name : Stepper Motor
      Model No. : 57HS5125A4
      Frame Size : 57 x 57mm (Nema 23)
      Step Angle : 1.8
      Rated Current : 2.5A
      [https://www.amazon.co.uk/gp/product/B074CT44Z6](link url)

      my motor config is

      ; Drives
      M569 P0 S1 ; Drive 0 goes forwards
      M569 P1 S1 ; Drive 1 goes forwards
      M569 P2 S1 ; Drive 2 goes forwards
      M569 P3 S0 ; Drive 3 goes forwards
      M350 X16 Y16 Z16 I1
      M350 E8 ; Configure microstepping with interpolation
      M92 X80 Y80 Z80 E1900 ; Set steps per mm
      M566 X1200 Y1200 Z1200 E6 ; Set maximum instantaneous speed changes (mm/min)
      M203 X18000 Y18000 Z18000 E2400 ; Set maximum speeds (mm/min)
      M201 X1000 Y1000 Z100 E100 ; Set accelerations (mm/s^2)
      M906 X1200 Y800 Z800 E400 I30 ; Set motor currents (mA) and motor idle factor in per cent
      M84 S30 ; Set idle timeout

      https://dmkitservices.com

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      • dc42undefined
        dc42 administrators
        last edited by

        I suggest you print some grid lines to check whether the scaling is uniform or varies with position. Even a simple noughts-and-crosses/tic-tac-toe pattern big enough to cover the whole bed may be sufficient. If the scaling isn't uniform, the lines will be bent instead of straight. This is an indication that either the steps/mm or the configured rod length is out. You can check the steps/mm by measuring the height of a tall printed object.

        If the scaling is uniform, use M579 to correct it.

        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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        • dmkmediaundefined
          dmkmedia
          last edited by

          @dc42 said in prints coming out slightly too small delta printer:

          M579

          ok so if i am 4mm too big X and 1mm too big in Y
          how should the M579 Look

          https://dmkitservices.com

          dc42undefined 1 Reply Last reply Reply Quote 0
          • dc42undefined
            dc42 administrators @dmkmedia
            last edited by

            @dmkmedia said in prints coming out slightly too small delta printer:

            @dc42 said in prints coming out slightly too small delta printer:

            M579

            ok so if i am 4mm too big X and 1mm too big in Y
            how should the M579 Look

            That depends on how long the print was in X and Y. If it was 100mm in both directions, you would need:

            M579 X0.96 Y0.99

            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

            1 Reply Last reply Reply Quote 0
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