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Gaps in wall while printing

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  • undefined
    User3D
    last edited by User3D 25 Sept 2021, 05:38

    I am using Latest RRF3.4beta3. This is a first time I am facing such wall gap issue. my machine has 2 Y Axis motor and 1 X axis motor. All the problems are coming in when the both axes motors running together, specifically from top left top to bottom right direction or vice versa( i.e. from right bottom to left top).

    13.jpg 12.jpg 11.jpg

    undefined undefined 2 Replies Last reply 25 Sept 2021, 05:50 Reply Quote 0
    • undefined
      o_lampe @User3D
      last edited by 25 Sept 2021, 05:50

      @user3d It looks, like you have massive nozzle tilt and in some directions it's so bad, it causes underextrusion. (extruder skips steps)
      What about the bottom planes? Are they ment to have so many gaps? Or is it underextrusion, too?

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      • undefined
        dc42 administrators @User3D
        last edited by 25 Sept 2021, 14:08

        @user3d it looks to me that you have a large amount of backlash. Check for a loose motor pulley.

        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
          User3D
          last edited by 27 Sept 2021, 09:40

          @dc42 Any suggestions to resolve this backlash problem in preloaded ball screw system.

          undefined undefined 2 Replies Last reply 27 Sept 2021, 10:39 Reply Quote 0
          • undefined
            T3P3Tony administrators @User3D
            last edited by 27 Sept 2021, 10:39

            @user3d you imply this is an issue with RRF3.4b3? Can you see if you have the same issue using 3.3 stable?

            www.duet3d.com

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            • undefined
              User3D
              last edited by 27 Sept 2021, 11:12

              @T3P3Tony I had checked with older firmware and same result. I know there is no issue with software and G-code. I think it's related to backlash. Is there any possible solution?

              undefined undefined 2 Replies Last reply 27 Sept 2021, 11:27 Reply Quote 0
              • undefined
                cosmowave @User3D
                last edited by 27 Sept 2021, 11:27

                @user3d check if all mechanical parts are tight and everything is running smoothly without big resistance. Check if you have proper pulleys and belts.

                Mankati FSXT+, DeltaTowerV2, E3D MS/TC

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                • undefined
                  gloomyandy @User3D
                  last edited by 27 Sept 2021, 13:08

                  @user3d Might be worth posting some pictures of your printer so that folks can see how it is set up. I guess details of how the axis are driven would be really useful.

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                  • undefined
                    dc42 administrators @User3D
                    last edited by dc42 27 Sept 2021, 20:26

                    @user3d said in Gaps in wall while printing:

                    @dc42 Any suggestions to resolve this backlash problem in preloaded ball screw system.

                    Are there grub screws involved in coupling the ball screws to the motors?

                    You have a huge amount of backlash in the direction bottom left/top right in the first and last images you posted. How does that direction line up with the axes of your printer?

                    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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