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Tips to mitigate vertical artifacting Duet 2 Wifi

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  • undefined
    mwolter
    last edited by mwolter 10 May 2020, 16:53 4 Oct 2020, 02:48

    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.

    undefined 2 Replies Last reply 5 Oct 2020, 16:51 Reply Quote 1
    • undefined
      Veti
      last edited by 4 Oct 2020, 05:15

      hi chris.

      i presume that you have done the mechanical checks.
      corexy are very susceptible to problems in the belt path.

      • bad pulleys
      • toothed belt on smooth pulley
      • belts not parallel

      also check for slight belt twisting when the direction of movement of the belt changes.

      16 tooth pulley can improve the effect from switching from 1.8 to 0.9 pulleys further.

      undefined 1 Reply Last reply 5 Oct 2020, 16:50 Reply Quote 1
      • undefined
        brotherchris @Veti
        last edited by 5 Oct 2020, 16:50

        @Veti I have been over it many times and I am still running belts over smooth pullies. That is my next move. I need to find some toothed pullies that will fit my setup. I am currently using flanged bearings.

        undefined undefined 2 Replies Last reply 5 Oct 2020, 16:56 Reply Quote 0
        • undefined
          brotherchris @mwolter
          last edited by 5 Oct 2020, 16:51

          @mwolter Thank you! That's an interesting thought. I will setup a test and see what happens.

          1 Reply Last reply Reply Quote 0
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            Veti @brotherchris
            last edited by 5 Oct 2020, 16:56

            @brotherchris
            If you are running them over F623zz then finding a good tooth pulley will be hard.
            the only thing that comes close are Gates Powergrip® 2GT Idlers, buy they are 5mm ID.

            undefined 1 Reply Last reply 5 Oct 2020, 16:59 Reply Quote 0
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              brotherchris @Veti
              last edited by 5 Oct 2020, 16:59

              @Veti Yeah, that kind of sucks. I have been looking for alternatives all morning, but 5mm bore is about my only option. I really didn't want to go down that small. I am determined to find some sort of work around.

              undefined 1 Reply Last reply 5 Oct 2020, 17:55 Reply Quote 0
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                Veti
                last edited by 5 Oct 2020, 17:10

                what quality are your F623zz ? for a corexy they should be ABEC-3 or above.

                undefined 1 Reply Last reply 5 Oct 2020, 17:22 Reply Quote 0
                • undefined
                  Veti
                  last edited by 5 Oct 2020, 17:16

                  i am going to test these myself once they arrive.
                  https://www.aliexpress.com/item/4000040551804.html
                  but i dont have high hopes

                  undefined 1 Reply Last reply 5 Oct 2020, 17:42 Reply Quote 1
                  • undefined
                    brotherchris @Veti
                    last edited by 5 Oct 2020, 17:22

                    @Veti I am actually using F688ZZ. Not sure the grade.

                    undefined 1 Reply Last reply 5 Oct 2020, 17:41 Reply Quote 0
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                      Veti @brotherchris
                      last edited by 5 Oct 2020, 17:41

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

                      F688ZZ

                      closest thing i can find is
                      https://www.aliexpress.com/item/32961265334.html
                      but its 6mm bore

                      1 Reply Last reply Reply Quote 0
                      • undefined
                        Adrian52 @Veti
                        last edited by 5 Oct 2020, 17:42

                        @Veti I am trying 16 tooth idlers like this on my kossel delta, but have bought some 6x2.5x3mm bore bearings, and pressed 3 into each idler. You clamp the idler firmly (not possible with the original 2 bearing idlers), but you need 3mm bore washers that are 4.5mm diameter to do this. Will be interesting to see if they last longer.

                        1 Reply Last reply Reply Quote 0
                        • undefined
                          fcwilt @brotherchris
                          last edited by 5 Oct 2020, 17:55

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

                          @Veti Yeah, that kind of sucks. I have been looking for alternatives all morning, but 5mm bore is about my only option. I really didn't want to go down that small. I am determined to find some sort of work around.

                          It seems you think 5mm is too small. Why do you think that is so?

                          Thanks.

                          Frederick

                          Printers: a small Utilmaker style, a small CoreXY and a E3D MS/TC setup. Various hotends. Using Duet 3 hardware running 3.4.6

                          undefined 1 Reply Last reply 5 Oct 2020, 18:00 Reply Quote 1
                          • undefined
                            brotherchris @fcwilt
                            last edited by 5 Oct 2020, 18:00

                            @fcwilt It's not that I think it's too small, I just wanted a little larger hardware on this setup.

                            undefined 1 Reply Last reply 5 Oct 2020, 18:05 Reply Quote 0
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                              Phaedrux Moderator @brotherchris
                              last edited by 5 Oct 2020, 18:04

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

                              I need to find some toothed pullies that will fit my setup.

                              I was able to do a few belt twists to run the smooth side of the belt over my flanged bearings. When I tried toothed idlers there was still a lot of ridges. I think the small 16T idlers are just too tight of a bend for the teeth to mesh smoothly. I was able to have the belt twists on the fixed length sections between the motor and the rear idlers.

                              Z-Bot CoreXY Build | Thingiverse Profile

                              undefined 2 Replies Last reply 5 Oct 2020, 18:13 Reply Quote 1
                              • undefined
                                Veti @brotherchris
                                last edited by 5 Oct 2020, 18:05

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

                                It's not that I think it's too small, I just wanted a little larger hardware on this setup.

                                ok then here you go.
                                https://www.aliexpress.com/item/32961693003.html
                                its 8mm bore.
                                but the diameter is larger than the F688ZZ

                                undefined 1 Reply Last reply 5 Oct 2020, 18:14 Reply Quote 1
                                • undefined
                                  brotherchris @Phaedrux
                                  last edited by 5 Oct 2020, 18:13

                                  @Phaedrux Run a test with a belt twist now.

                                  1 Reply Last reply Reply Quote 0
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                                    brotherchris @Veti
                                    last edited by 5 Oct 2020, 18:14

                                    @Veti Nice find, I am going to grab some for testing.

                                    1 Reply Last reply Reply Quote 0
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                                      brotherchris @Phaedrux
                                      last edited by 5 Oct 2020, 20:17

                                      @Phaedrux Still confused, the belt flip didn't change anything.

                                      undefined 1 Reply Last reply 5 Oct 2020, 21:52 Reply Quote 0
                                      • undefined
                                        Phaedrux Moderator @brotherchris
                                        last edited by 5 Oct 2020, 21:52

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

                                        @Phaedrux Still confused, the belt flip didn't change anything.

                                        Well that's one more thing to cross off the list and leaves stepper artifacts. I wonder if it's related to the exoslide movement? Is there more or less resistance to motion with it?

                                        Were you able to print a test that varied the speed over a range to try and see if there is a speed which doesn't excite the artifacts?

                                        Z-Bot CoreXY Build | Thingiverse Profile

                                        undefined 1 Reply Last reply 6 Oct 2020, 14:58 Reply Quote 0
                                        • undefined
                                          bot
                                          last edited by bot 10 May 2020, 22:19 5 Oct 2020, 22:17

                                          What I.D. would you prefer for a toothed idler? Also, what effective O.D. are you aiming for? (to keep the belts aligned)

                                          I agree it's too hard to find the right idlers, but Misumi has a few options I could try and find something for you.

                                          *not actually a robot

                                          undefined 1 Reply Last reply 6 Oct 2020, 14:44 Reply Quote 0
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