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FT5 Conversion - Endstop issue

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Duet Hardware and wiring
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  • undefined
    Legrand
    last edited by 29 Jan 2018, 15:35

    So, I'm converting a FT5 to use the Duet interface. I've already installed it on 5 other Delta-type printers, but this is the first Cartesian printer I'm using it on.

    I have everything wired up and connected to the WiFi but I'm having issues with the endstops. They will not read, neither in the software, i.e. web interface, nor via a M119 command, that they have triggered. The endstop LED's light up both at the point of use as well as on the Duet board, so I know that they are "working", but when I try to home an axis, they just crash and keep going (obviously, since they aren't triggering).

    Any ideas what's going on? These are normally open type endstops.

    Thanks.

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    • undefined
      dc42 administrators
      last edited by 29 Jan 2018, 16:20

      What type of endstop switch are they: simple microswitches, optical, or something else?

      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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      • undefined
        Legrand
        last edited by 29 Jan 2018, 16:52

        It's a simple microswitch end stop. You can see them here:

        https://folgertech.com/collections/breadboards-wires-led-resistors-switches/products/end-stop

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        • undefined
          dc42 administrators
          last edited by 29 Jan 2018, 17:18

          I suspect you have them miswired so that both LEDs are ending up in series. See Makerbot Mechanical Endstop v1.2 at https://duet3d.com/wiki/Connecting_endstop_switches#Makerbot_Mechanical_Endstop_v1.2.

          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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          • undefined
            Legrand
            last edited by 29 Jan 2018, 19:02

            Yeah, the Makerbot endstop wires (GND & 3.3V) need to be flipped on the wire from the factory and I did that from the get-go.

            Here's my setup:
            My wired up board:

            The end stop on the machine. Switch is on the right side as shown.

            An exact replica spare endstop I have:

            For demonstration purposes, spare endstop plugged in (Black jacket connector in the back with Black, Red, Green wires) and depressed to show both LED's are lighting up. M119 does NOT report the endstop as triggered.

            If I switch the red/black wires, it acts like it's already triggered (LED's are lit up without switch depressed). I remember I had the flipped wire problem when building one of my Delta's so I knew to double check the order they're placed for this one.

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            • undefined
              PcS
              last edited by 30 Jan 2018, 11:30

              In the firmware the switch type can be selected as well as triggers at high or low end . I assume you have these set correct ? I am running the duet WiFi on my FT-5 with the stock switches working perfectly, and I don’t remember re-wiring them .

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              • undefined
                dc42 administrators
                last edited by 30 Jan 2018, 13:11

                Your connections look correct to me. What M574 command(s) do you have in config.g?

                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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                • undefined
                  Legrand
                  last edited by 31 Jan 2018, 14:49

                  The M574 command I have is:

                  M574 X0 Y0 S1

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                  • undefined
                    dc42 administrators
                    last edited by 31 Jan 2018, 15:26

                    X0 Y0 mean you have no endstops. Use X1 Y1 if they are axis minimum endstops, or X2 Y2 if they are axis maximum endstops.

                    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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