Duet3D Logo Duet3D
    • Tags
    • Documentation
    • Order
    • Register
    • Login

    Surface quality issue

    Scheduled Pinned Locked Moved
    Tuning and tweaking
    5
    10
    1.8k
    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.
    • zlowredundefined
      zlowred
      last edited by

      Hi all,
      I just replaced cheap 8-bit noname board with the Duet Wifi and seeing strange quality issues (see photo attached). On lower speeds (like 20-30 mm/s) flat vertical surfaces are showing some banding with interleaving diagonal stripes and normal-ish surface. The issue gradually goes away at ~60 mm/s where surface becomes much better.
      I didn't see such issue with my old board, and I didn't change anything in the physical build, just replaced the board, so shouldn't be a mechanical problem.
      Jerk, microstepping changes and acceleration do not seem to affect the issue.
      It is a custom-built delta printer.
      Duet is running on the latest firmware.
      Any help is really appreciated.

      Thanks


      https://ibb.co/fh0eja

      1 Reply Last reply Reply Quote 0
      • dc42undefined
        dc42 administrators
        last edited by

        What motors are you using, and what currents have you set in the M906 command in config.g.?

        What microstepping stepping are you using? (M350 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
        • zlowredundefined
          zlowred
          last edited by

          I'm using some noname (Anycubic) 1.8º NEMA17 steppers. Label says they're rated for 1.5A with 4.4mH inductance.
          M906 sets 1200mA current, and for M350 I've tried 1/16 microstepping (80 steps per mm) and 1/32 (160 step per mm) without any noticeable difference.

          1 Reply Last reply Reply Quote 0
          • zlowredundefined
            zlowred
            last edited by

            I'm also using Zesty Nimble extruder without much experience with using it. Checking with Zesty folks in parallel if it is extruder-related.

            1 Reply Last reply Reply Quote 0
            • zlowredundefined
              zlowred
              last edited by

              Same firmware configuration & slicer settings except the speed is 60 mm/s instead of 24 (or 20 - can't remember) mm/s on the first print:

              https://ibb.co/cE8bVF

              1 Reply Last reply Reply Quote 0
              • SpeedyDadundefined
                SpeedyDad
                last edited by

                Maybe a temp issue? Looks maybe too hot?

                1 Reply Last reply Reply Quote 0
                • dc42undefined
                  dc42 administrators
                  last edited by

                  It looks to me like uneven extrusion, because there is a regular horizontal repeat on each layer that isn't lined up between layers. Also I think there is over-extrusion.

                  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
                  • larsundefined
                    lars
                    last edited by

                    Hi zlowred!

                    Did you resolve problem this?

                    1 Reply Last reply Reply Quote 0
                    • Zesty_Lykleundefined
                      Zesty_Lykle
                      last edited by

                      This problem was resolved.
                      It was due to the fault we detected in the cable manufacturing.
                      Our supplier admitted fault and all the cables have been replaced.
                      Full story here: https://zesty.tech/blogs/ramblings/no-problem

                      Lykle
                      Design, make and enjoy life

                      Co Creator of the Zesty Nimble

                      1 Reply Last reply Reply Quote 0
                      • zlowredundefined
                        zlowred
                        last edited by

                        Correct. Similar flat surface with exactly the same settings looks like this: with the replacement cable

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