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Strange Blobbing on Layer Change

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Tuning and tweaking
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  • undefined
    Phaedrux Moderator @davidewen
    last edited by 4 Nov 2022, 20:28

    @davidewen said in Strange Blobbing on Layer Change:

    I've increased jerk in PrusaSlicer to the following;
    X: 32
    Y: 32
    Z: 32
    E: 20

    Where did you change that?

    I assume that's in mm/s?

    Does prusa slicer now allow per move jerk settings as well as acceleration? I didn't think so.

    Is your prusa slicer set to RepRap gcode flavour?

    Can you share a sliced gcode file?

    Your config file still has the limits set very low, so unless your slicer is actually sending M566/M203/M201 commands to change the limits during a print you are being limited by the config.g

    Z-Bot CoreXY Build | Thingiverse Profile

    undefined undefined 2 Replies Last reply 5 Nov 2022, 00:13 Reply Quote 0
    • undefined
      Norder @Phaedrux
      last edited by Norder 11 May 2022, 08:55 5 Nov 2022, 00:13

      @Phaedrux

      Does prusa slicer now allow per move jerk settings as well as acceleration? I didn't think so.

      The PrusaSlicer has its own jerk setting (mm/s), maximum acceleration (mm/s²) and maximum feed (mm/s)
      for each axis.

      DDA5X... 0.9° Stepper... Linearrails... Duet 2 Wifi... PT100 Board... Duet IR-Probe... Dyze Pro Kit up to 500°C.. etc
      Thingiverse

      undefined 1 Reply Last reply 5 Nov 2022, 04:46 Reply Quote 0
      • undefined
        Phaedrux Moderator @Norder
        last edited by 5 Nov 2022, 04:46

        @Norder said in Strange Blobbing on Layer Change:

        The PrusaSlicer has its own jerk setting

        Where? You mean in the machine limits?

        Z-Bot CoreXY Build | Thingiverse Profile

        undefined 1 Reply Last reply 5 Nov 2022, 08:52 Reply Quote 0
        • undefined
          Norder @Phaedrux
          last edited by 5 Nov 2022, 08:52

          @Phaedrux
          Yes, exactly.
          But it is clear that the upper limit is determined by the config.g.

          DDA5X... 0.9° Stepper... Linearrails... Duet 2 Wifi... PT100 Board... Duet IR-Probe... Dyze Pro Kit up to 500°C.. etc
          Thingiverse

          undefined 1 Reply Last reply 5 Nov 2022, 15:46 Reply Quote 0
          • undefined
            davidewen @Norder
            last edited by 5 Nov 2022, 15:46

            @Norder @Phaedrux @weed2all

            Thank you all for responding.
            I will not be able to check settings or respond back with said settings until late next week.

            Cheers

            1 Reply Last reply Reply Quote 0
            • undefined
              davidewen @Phaedrux
              last edited by 7 Nov 2022, 15:33

              @Phaedrux

              Yes, I made those changes in PrusaSlicer.
              Are you suggesting that I make the changes in config.g?
              And if so, is that command M566?

              My current M566 is not labeled "jerk" so I just want to confirm.

              M566 X1500.00 Y1500.00 Z600.00 E120.00 ; set maximum instantaneous speed changes (mm/min)
              M203 X12000.00 Y12000.00 Z600.00 E2100.00 ; set maximum speeds (mm/min)
              M201 X1500.00 Y1500.00 Z500.00 E250.00 ; set accelerations (mm/s^2)
              1 Reply Last reply Reply Quote 0
              • undefined
                Phaedrux Moderator
                last edited by 7 Nov 2022, 18:22

                Yes, maximum instantaneous speed changes is often called jerk.

                Z-Bot CoreXY Build | Thingiverse Profile

                undefined 1 Reply Last reply 7 Nov 2022, 19:25 Reply Quote 0
                • undefined
                  davidewen @Phaedrux
                  last edited by 7 Nov 2022, 19:25

                  @Phaedrux

                  Got it. Do you have some recommendations from my current settings?

                  undefined 1 Reply Last reply 8 Nov 2022, 03:59 Reply Quote 0
                  • undefined
                    Phaedrux Moderator @davidewen
                    last edited by 8 Nov 2022, 03:59

                    @davidewen Try these

                    M566 X1500.00 Y1500.00 Z600.00 E3000 ; set maximum instantaneous speed changes (mm/min)
                    M203 X12000.00 Y12000.00 Z600.00 E6000 ; set maximum speeds (mm/min)
                    M201 X1500.00 Y1500.00 Z500.00 E3000 ; set accelerations (mm/s^2)

                    Z-Bot CoreXY Build | Thingiverse Profile

                    undefined 1 Reply Last reply 8 Nov 2022, 23:46 Reply Quote 0
                    • undefined
                      davidewen @Phaedrux
                      last edited by 8 Nov 2022, 23:46

                      @Phaedrux
                      Thanks for the info. This has helped a lot. Seam is still there, but greatly improved.
                      I will play around with these settings to see if I can get it to almost perfect.

                      Cheers!

                      undefined 1 Reply Last reply 9 Nov 2022, 03:16 Reply Quote 0
                      • undefined
                        Phaedrux Moderator @davidewen
                        last edited by 9 Nov 2022, 03:16

                        @davidewen said in Strange Blobbing on Layer Change:

                        Seam is still there, but greatly improved.

                        Have you tune pressure advance yet? That's the remaining piece of the puzzle.

                        https://docs.duet3d.com/en/User_manual/Tuning/Pressure_advance

                        Z-Bot CoreXY Build | Thingiverse Profile

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