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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
      last edited by

      @theruttmeister Great info, this is 15mm/s. 20201002_204849.jpg

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      • Phaedruxundefined
        Phaedrux Moderator
        last edited by

        That's looking a bit cleaner. Is that a faint diagonal I see or is that an artifact of the image?

        A good way to test what @theruttmeister is talking about would be to reprint that object sliced at 100mm/s and then using the speed factor to change the speed by 10mm/s every 10 layers or so.

        Z-Bot CoreXY Build | Thingiverse Profile

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

          @Phaedrux Yeah, it's 45 degree striping. I will try it faster.

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          • brotherchrisundefined
            brotherchris
            last edited by brotherchris

            More pic of the stripes. Reminds me of old school A4988 candy strips. 20201002_211118.jpg 20201002_211128.jpg

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            • Phaedruxundefined
              Phaedrux Moderator
              last edited by

              For the sake of completeness can you provide your config.g, the results of M122 and M98 P"config.g". Maybe some more details on the printer.

              Z-Bot CoreXY Build | Thingiverse Profile

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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

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                  • 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 🙂

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                                    • brotherchrisundefined
                                      brotherchris @NexxCat
                                      last edited by

                                      @NexxCat lol, thank you!

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                                      • 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

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