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    Change Z-probe E0 pin

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    Duet Hardware and wiring
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    • Cuteberryundefined
      Cuteberry
      last edited by

      Hi! Yet another Duet lover here!

      I've some projects involving E0, E1 and E2 endstops pins in a near future and my Z-probe is currently using E0… It's a capacitive NPN sensor and I'd like to use E3 rather than E0 for example.

      Do you know how to deal with it? I can proceed to minor firmware modification, but I'm a bit lost currently to find where I could tune this.

      Thanks a lot!

      Setup:

      • Duet 0.8.5
      • PanelDue 4.7
      • MakerGear II custom
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      • dc42undefined
        dc42 administrators
        last edited by

        Why not use the Z probe connector and probe type P5 in your M558 command?

        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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        • Cuteberryundefined
          Cuteberry
          last edited by

          Good point! I tried but I realised soon after that this sensor is normally open, so I get 0V when triggered whereas "the input must be active high when triggered" in mode 5. Any chance to invert it (as mode 3 for mode 1)?

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          • dc42undefined
            dc42 administrators
            last edited by

            In firmware 1.16 and later you can use the I1 parameter on the M558 command to invert the polarity. I have updated the wiki.

            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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            • Cuteberryundefined
              Cuteberry
              last edited by

              Thanks for the hand dc42, I didn't succeeded with P5 but I managed to get it working using P1 (inverted with I1). So I'm now using AD12 for the probe signal and the 3.3V power on the sensor port. All the best!

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