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    Tips to mitigate vertical artifacting Duet 2 Wifi

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    Tuning and tweaking
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    • brotherchrisundefined
      brotherchris @Phaedrux
      last edited by

      @Phaedrux Sure, I posted config.g above, but I can do it again. config.g m122.txt 10/2/2020, 9:23:33 PM M98 P"config.g"
      Warning: Heater 0 appears to be over-powered. If left on at full power, its temperature is predicted to reach 265C

      The printer is an EXO cube, almost just like this one.
      https://www.exoslide.com/exocube-printer

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      • Phaedruxundefined
        Phaedrux Moderator @brotherchris
        last edited by Phaedrux

        @brotherchris said in Tips to mitigate vertical artifacting Duet 2 Wifi:

        @Phaedrux I thought about crossing the belt's I might try that. Config and slicer profile attached. I will print a ringing test. slicer settiongs.gcode config.g

        Sorry I missed those before.

        Nothing stands out as obvious in the config.

        Which leaves us with mechanics and the minutiae of stepper drivers.

        Z-Bot CoreXY Build | Thingiverse Profile

        brotherchrisundefined 1 Reply Last reply Reply Quote 0
        • brotherchrisundefined
          brotherchris @Phaedrux
          last edited by

          @Phaedrux said in Tips to mitigate vertical artifacting Duet 2 Wifi:

          minutiae

          Totally agree, I am pretty used to troubleshooting these types of things. I have seen this before, but never on a 2660 driver. This post was mainly to see if any other Duet users were seeing this. Great discussion by the way, enjoying it.

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          • Phaedruxundefined
            Phaedrux Moderator
            last edited by

            You might find this interesting: https://duet3d.dozuki.com/Wiki/Tuning_Stepper_Motor_Drivers

            Not sure how applicable or helpful it would be in this case though.

            Z-Bot CoreXY Build | Thingiverse Profile

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            • brotherchrisundefined
              brotherchris @fcwilt
              last edited by

              @fcwilt Thanks for the reply, 20201002_221416.jpg Left is normal, right is super tight belts.

              fcwiltundefined 1 Reply Last reply Reply Quote 0
              • brotherchrisundefined
                brotherchris @Phaedrux
                last edited by

                @Phaedrux Ringing test. 20201002_225434.jpg

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                • Phaedruxundefined
                  Phaedrux Moderator
                  last edited by Phaedrux

                  Might be able to reduce the ringing a bit with a drop of jerk from 1200 to 700.

                  Hard to say if that would be enough to fix the benchy artifacts.

                  Z-Bot CoreXY Build | Thingiverse Profile

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                  • fcwiltundefined
                    fcwilt @brotherchris
                    last edited by

                    @brotherchris said in Tips to mitigate vertical artifacting Duet 2 Wifi:

                    @fcwilt Thanks for the reply, 20201002_221416.jpg Left is normal, right is super tight belts.

                    I wish I could remember exactly what I did to fix the problem. It was awhile ago when I had a CoreXY of my own design.

                    Frederick

                    Printers: a E3D MS/TC setup and a RatRig Hybrid. Using Duet 3 hardware running 3.4.6

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                    • Vetiundefined
                      Veti
                      last edited by Veti

                      i switched to 0.9 degrees stepper and 16 tooth pulleys.

                      see
                      https://forum.prusaprinters.org/forum/original-prusa-i3-mk3s-mk3-user-mods-octoprint-enclosures-nozzles-.../stepper-motor-upgrades-to-eliminate-vfa-s-vertical-fine-artifacts/

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                      • brotherchrisundefined
                        brotherchris
                        last edited by

                        Latest print, the 0.9 degree steppers are my last resort. I think I have exhausted most of my other ideas. I will switch them out today and report back.20201003_094351.jpg

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                        • NexxCatundefined
                          NexxCat
                          last edited by

                          Sorry, kinda off topic, but just put 2+2 together and realised @brotherchris was Chris Riley. Love your videos, keep up the fab work 🙂

                          brotherchrisundefined 1 Reply Last reply Reply Quote 1
                          • brotherchrisundefined
                            brotherchris @NexxCat
                            last edited by

                            @NexxCat lol, thank you!

                            1 Reply Last reply Reply Quote 2
                            • Phaedruxundefined
                              Phaedrux Moderator
                              last edited by

                              Yeah definitely looking like VFA. Upping your natural steps per mm on XY would be a good next step.

                              Z-Bot CoreXY Build | Thingiverse Profile

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                              • brotherchrisundefined
                                brotherchris
                                last edited by

                                The 0.9 motors might have helped a bit, but I think this is as good as it's going to get. 1.8 on the right 0.9 on the left.20201003_145945.jpg

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                                • botundefined
                                  bot
                                  last edited by

                                  Did you end up playing with a range of jerk (instantaneous speed change) values? I've found that certain values of jerk are much worse than others for artifacts like this. Obviously, the amount of acceleration plays a role, too.

                                  Try a test of ranges of jerk values with a range of acceleration values, too. I almost forgot to mention feedrate. Try a combination of different jerk, accel, and feedrates.

                                  dc42 has on his list to implement some alternative to "jerk" (not real jerk, but you know what we mean) similar to junction deviation. After finally learning what junction deviation actually is and how exactly it works -- I'm convinced that I would like to try it! It might alleviate problems like this: weird motion on curves.

                                  *not actually a robot

                                  brotherchrisundefined 1 Reply Last reply Reply Quote 1
                                  • brotherchrisundefined
                                    brotherchris @bot
                                    last edited by

                                    @bot I have made a few changes, my settings are pretty low at the moment, but I could setup a test and try different ranges.

                                    botundefined 1 Reply Last reply Reply Quote 0
                                    • botundefined
                                      bot @brotherchris
                                      last edited by

                                      @brotherchris it's not exactly putting them low that makes the best results -- it's just finding the right combination. For me, for example, 4, 5, 6, and 7 mm/s jerk produces worse results than 8 mm/s. In some tests. It's hard to figure out, but sometimes you find a combination that works magically. Heh. It's my method for now: guess and check.

                                      *not actually a robot

                                      brotherchrisundefined 1 Reply Last reply Reply Quote 2
                                      • brotherchrisundefined
                                        brotherchris @bot
                                        last edited by

                                        @bot lol, guess and check is my thing! Testing now, I will see if I can find a combo. Thanks for the tips.

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                                        • brotherchrisundefined
                                          brotherchris
                                          last edited by

                                          Well, I am going to take that back. The single wall prints are much improved by the 0.9 steppers. Top one is before. 20201003_161602.jpg

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                                          • mwolterundefined
                                            mwolter
                                            last edited by mwolter

                                            Chris, fan of your videos and appreciate your contributions to the community.

                                            One question, can you do a single wall test with varying line widths? For instance, 0 to 9.8mm at .4 mm width, 10 to 19.8 .42mm width, etc. In the past, I’ve found vertical or diagonal lines like this caused by inconsistent extrusion and can point to an issue with your extruder. If you perform a single wall test with extrusion parameters that vary at different heights and the angle of the diagonal lines changes, there could be an issue with inconsistent extrusion.

                                            The key is to see if the angle of the diagonal line artifacts changes with varying extrusion parameters.

                                            brotherchrisundefined 2 Replies Last reply Reply Quote 1
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