Duet3D Logo

    Duet3D

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

    Motors enabled on power up?

    General Discussion
    5
    8
    966
    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.
    • xnaron
      xnaron last edited by

      I've moved my extruder to a flying extruder configuration on my delta and it will drop when the power is turned off. I'm using little clamps to pinch the belts to stop it from moving when powered off. When I power on I need to hold the effector up with my hand and remove the clamps then use the web interface to home. Is it possible to have the motors enabled and holding at startup? I'm probably missing some obvious way to do it but it looks like reprap firmware only has a gcode for motor disable.

      thanks,
      Brendin

      Pic
      https://goo.gl/photos/H8pJqpZcn4mZTosQ9

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

        How about clamping the belt in a way that the carriage can only move upwards and have G28 at the end of your config.g?

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

          I don't normally recommend putting any movement commands in config.g, but you could put G1 S2 X0.1 Y0.1 Z0.1 at the end of config.g to turn the motors on.

          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
          • DjDemonD
            DjDemonD last edited by

            Consider a counterweight. I'm having the same issue now I have a dual extrusion flying setup it drops on power off. It would only take some fishing line and a few pulleys.

            Simon. Precision Piezo Z-Probe Technology
            www.precisionpiezo.co.uk
            PT1000 cartridge sensors NOW IN, just attach to your Duet board directly!

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

              Thanks guys. Good ideas!

              dc42- I did try that at the end in the config.g but it didn't work for some reason.

              Brendin

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

                I think

                G1 S2 X0.1 Y0.1 Z0.1;

                Didn't work because it is a delta and moves are prevented until it is homed.

                This is the message in the gcode console when trying it after turning on and before homing
                "Attempt to move the motors of a delta printer to absolute positions"

                As a workaround for now I just put a G28; at the bottom of the config.g. My workflow for turning on the printer will be to remove the clamps on the belts and hold the effector in place with my hand and then turn it on and it homes. I'm thinking of implementing the counter weight idea.

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

                  I'm sorry, I forgot that you need to run G91 before the G1 S2 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

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

                    I have a counterweight connected to my flying extruder to solve the problem of the hotend descending when the power is off. Works like a charm.

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