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Uneven layers

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Tuning and tweaking
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  • undefined
    antlestxp
    last edited by 26 May 2019, 21:31

    16th steps no interpolation. spiral shell at .2mm

    0_1558906248763_MVIMG_20190526_142757.jpg

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    • undefined
      antlestxp
      last edited by antlestxp 27 May 2019, 00:23

      awe man... i hate to admit my issue was mechanical after all... I must have knocked one of the z leads off center doing the board install. I stripped the z axis down, clean, lubed and the next print was flawless. hopefully @Haggan90 your problem is as simple as an alignment issue as well.

      0_1558916573721_MVIMG_20190526_171859.jpg

      undefined 1 Reply Last reply 28 May 2019, 09:29 Reply Quote 1
      • undefined
        T3P3Tony administrators
        last edited by 27 May 2019, 14:10

        @antlestxp Thanks so much for coming on and letting us know the cause!

        www.duet3d.com

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        • undefined
          Haggan90 @antlestxp
          last edited by 28 May 2019, 09:29

          @antlestxp I'm super glad it worked out for you!
          I've abandoned my lead screws and aiming for a belt driven Z axis instead.. doesent matter what I do, I still get this imperfections.

          ? undefined 2 Replies Last reply 28 May 2019, 10:19 Reply Quote 0
          • ?
            A Former User @Haggan90
            last edited by 28 May 2019, 10:19

            @haggan90 I'm gonna try a belt driven screw before I revert belt only. The 2mm pitch screw will prevent the bed moving, a belt only would need a worm gear to hold the bed in place in case of power loss. Maybe something to consider, can print most of the parts although I'm going all metal, with a bearing block to provide both radial and axial support for the screw, but that means I also have to redesign the x-axis (then again wanting to use openbuilds style anti backlash nuts (flat/square type) so would have had to do that anyway)
            0_1559038612013_4614a4df-ca6b-41f5-99b4-ae66360add57-image.png

            undefined 1 Reply Last reply 28 May 2019, 15:32 Reply Quote 0
            • undefined
              Veti @Haggan90
              last edited by 28 May 2019, 10:57

              @haggan90 said in Uneven layers:

              I've abandoned my lead screws and aiming for a belt driven Z axis instead.. doesent matter what I do, I still get this imperfections.

              It might not be the lead screw of the belt. it could be friction because of the linear bearings.
              your SCSXUU might be to short to give a stable bed try some SCSXLUU.

              undefined 1 Reply Last reply 28 May 2019, 15:34 Reply Quote 0
              • undefined
                Haggan90 @A Former User
                last edited by 28 May 2019, 15:32

                @bearer that's awsome! I habe a system with a 3:1 gear ratio in mind with a 10mm belt. As I use 3 individual motors for the Z axis I don't think the bed will "fall" down during a powerloss, maybe it will slowly glide down 🙂

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                • undefined
                  Haggan90 @Veti
                  last edited by 28 May 2019, 15:34

                  @veti if I use the longer bearings there is a chance of binding when I level the bed, as I use 3 motors for leveling. I've measured that the bed moves a maximum of +-0.02mm in X/Y during movement in Z.

                  undefined 1 Reply Last reply 28 May 2019, 15:37 Reply Quote 0
                  • undefined
                    Phaedrux Moderator @Haggan90
                    last edited by 28 May 2019, 15:37

                    @haggan90 I would think that you'd want the flex point to be between the rigid bearing and the bed plate rather than the bearing itself.

                    Z-Bot CoreXY Build | Thingiverse Profile

                    undefined 1 Reply Last reply 28 May 2019, 15:41 Reply Quote 0
                    • undefined
                      Haggan90 @Phaedrux
                      last edited by 28 May 2019, 15:41

                      @phaedrux it's not possible in my design atm. Best case scenario would be if I used linear bearings for the z axis as well, then i could have all 3 points move more independent.

                      undefined 1 Reply Last reply 28 May 2019, 15:56 Reply Quote 0
                      • undefined
                        Phaedrux Moderator @Haggan90
                        last edited by 28 May 2019, 15:56

                        @haggan90 Perhaps consider using oldham style couplings to mount your screws to the bed to allow for some self alignment.
                        https://www.thingiverse.com/thing:2907060

                        Z-Bot CoreXY Build | Thingiverse Profile

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