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    Struggling with PID tuning on Duet 3 with custom CoreXY

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    • aria_jamesundefined
      aria_james
      last edited by

      Hey everyone,

      I’ve just finished building a custom CoreXY printer using a Duet 3 board, a Smart Effector, and a high-flow hotend. The setup runs great overall, but I’m running into some issues with temperature stability — especially during longer prints with higher flow rates. The hotend temperature tends to drift a bit, and I’d like to tighten it up.

      I did the usual auto-tune, but I’m wondering if there are better ways to manually fine-tune or improve stability, especially for materials like ABS or Nylon that are a bit more sensitive. Has anyone dealt with this kind of issue on a similar setup?

      Any advice or experience you can share would be really appreciated!

      gloomyandyundefined dc42undefined droftartsundefined 3 Replies Last reply Reply Quote 0
      • gloomyandyundefined
        gloomyandy @aria_james
        last edited by

        @aria_james It would probably help if you could post a screenshot showing the sort of temperature variation you are seeing during a print.

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        • dc42undefined
          dc42 administrators @aria_james
          last edited by

          @aria_james said in Struggling with PID tuning on Duet 3 with custom CoreXY:

          The hotend temperature tends to drift a bit, and I’d like to tighten it up.

          When you say it is drifting, is that when the printer is idle or when it is printing? As it's a high flow hot end it's common to see the temperature drop when it starts extruding at a high rate. You can configure heater feedforward to combat that.

          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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          • droftartsundefined
            droftarts administrators @aria_james
            last edited by

            @aria_james

            @dc42 said in Struggling with PID tuning on Duet 3 with custom CoreXY:

            You can configure heater feedforward to combat that.

            See https://docs.duet3d.com/User_manual/Connecting_hardware/Heaters_tuning#heater-feedforward

            Ian

            Bed-slinger - Mini5+ WiFi/1LC | RRP Fisher v1 - D2 WiFi | Polargraph - D2 WiFi | TronXY X5S - 6HC/Roto | CNC router - 6HC | Tractus3D T1250 - D2 Eth

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