Navigation

    Duet3D Logo

    Duet3D

    • Register
    • Login
    • Search
    • Categories
    • Tags
    • Documentation
    • Order

    Duet Ethernet not connecting anymore

    Duet Hardware and wiring
    2
    8
    551
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • shackman
      shackman last edited by

      Hi,

      I think I shorted my IR Sensor to one of my Z-motors via my heatbed clamp.
      Now it does not connect to my ethernet anymore.
      When I power it on the following LEDs are on:

      LED E1 Heat (red)
      LED E0 Heat (red blinking)
      LED VIN (blue)
      LED +5V (red)
      LED +3.3V (green very dim)

      The Hotend and Heatbed are getting hot.

      Is there a way to rescue the board?

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

        @shackman said in Duet Ethernet not connecting anymore:

        I think I shorted my IR Sensor to one of my Z-motors via my heatbed clamp.

        Do you mean that the IR sensor shorted to one of the Z motor connections, or to the body of the Z motor?

        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
        • shackman
          shackman last edited by

          I believe it shorted to the leadscrew. So to the body of the motor.

          1 Reply Last reply Reply Quote 0
          • shackman
            shackman last edited by

            or maybe to Heatbed -

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

              @shackman said in Duet Ethernet not connecting anymore:

              or maybe to Heatbed -

              That would certainly explain it. A short to Heatbed- would feed VIN into the IR sensor any time that the bed heater is not running at full power. So VIN would get fed into the +3.3V rail. Ouch!

              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
              • shackman
                shackman last edited by shackman

                so it's dead?

                And is the IR-Probe dead too?

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

                  Sadly, they are probably both dead. The processor on the IR sensor is rated at 7V absolute maximum. You could try applying 3.3V or 5V between Vcc and Gnd, to see if it will still initialise and flash the LED.

                  The processor on the Duet is rated at much less than that. The fact that the 3.3V LED is dim suggests that something on the 3.3V rail is drawing too much current. You will probably find that U2 and at least one other component on the Duet are getting hot.

                  It's probably not much consolation, but you are not the first. In the early days of the Ormerod 1 printer there were a few instances of kit assemblers fitting the aluminium bed plate upside down. This caused one of the bed heater terminals to touch it. Then the proximity sensor (another type of IR sensor) would sometimes short against the clips holding the glass top plate in place... and that would feed 12V into the 3.3V rail.

                  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
                  • shackman
                    shackman last edited by shackman

                    Yes, U2 and the main processor are getting very hot a few seconds after applying power via the usb port.

                    OK thats sad, but thank you for your fast help

                    1 Reply Last reply Reply Quote 0
                    • First post
                      Last post
                    Unless otherwise noted, all forum content is licensed under CC-BY-SA