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Wavy surface problem.

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Duet Hardware and wiring
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  • undefined
    Luke'sLaboratory @Egon.Net
    last edited by 26 May 2021, 12:18

    @egon-net

    my largest is 622x622x1000, and i still added 30kg of concrete to the base. 🙂

    shrug

    Luke
    http://lukeslab.online

    undefined 1 Reply Last reply 26 May 2021, 12:22 Reply Quote 0
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      Egon.Net @Luke'sLaboratory
      last edited by 26 May 2021, 12:22

      @luke-slaboratory said in Wavy surface problem.:

      @egon-net

      my largest is 622x622x1000, and i still added 30kg of concrete to the base. 🙂

      shrug

      And then you threw it to the river XDD Just joking...

      Did u really noticed a decrease in noise/ringing after adding so much extra weight?

      undefined 1 Reply Last reply 26 May 2021, 12:29 Reply Quote 0
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        Luke'sLaboratory @Egon.Net
        last edited by 26 May 2021, 12:29

        @egon-net

        20201016_000159.jpg 20201015_204348.jpg

        Suprisingly, yes!

        I forget what the numbers were for feeds+speeds, but it made a considerable improvment for $12

        Luke
        http://lukeslab.online

        undefined undefined undefined 3 Replies Last reply 26 May 2021, 13:16 Reply Quote 0
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          Egon.Net @Luke'sLaboratory
          last edited by 26 May 2021, 13:16

          @luke-slaboratory said in Wavy surface problem.:

          @egon-net

          20201016_000159.jpg 20201015_204348.jpg

          Suprisingly, yes!

          I forget what the numbers were for feeds+speeds, but it made a considerable improvment for $12

          Holy cow! What a difference!

          I already have installed an accelerometer, just waiting for the montion planner overhaul with imput shaping in reprapfirmware...

          1 Reply Last reply Reply Quote 0
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            gloomyandy @Luke'sLaboratory
            last edited by 26 May 2021, 13:19

            @luke-slaboratory So is that improvement from adding the extra mass to the printer?

            undefined 1 Reply Last reply 26 May 2021, 13:20 Reply Quote 0
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              Luke'sLaboratory @gloomyandy
              last edited by 26 May 2021, 13:20

              @gloomyandy

              Yessir! Both pictures were me trying to find the worst light where I was, but I fully admit that they're not 1:1 comparative since they weren't taken in the same spot.

              Luke
              http://lukeslab.online

              undefined 1 Reply Last reply 26 May 2021, 13:25 Reply Quote 0
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                gloomyandy @Luke'sLaboratory
                last edited by 26 May 2021, 13:25

                @luke-slaboratory That's interesting though. Complex things these printers!

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                  Hiroaki @tpra
                  last edited by 27 May 2021, 15:36

                  @tpra Hello. That print result is excellent ! Can you show me a photo how your printer is constructed?

                  undefined 1 Reply Last reply 31 May 2021, 06:21 Reply Quote 0
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                    CCS86 @Egon.Net
                    last edited by 30 May 2021, 17:51

                    @egon-net said in Wavy surface problem.:

                    @tpra said in Wavy surface problem.:

                    @egon-net same quality at low speed. even better actually.
                    if i don't go faster with rrf it's because it produces too much ghosting but that's another story 🙂
                    anyway klipper produces the same quality from 40 to 130.

                    Can you test Klipper without input shaper? I wonder how much of the quality increase is beacuse of it...

                    I am very curious to see this as well!

                    Input shaper benefits are pretty well established at this point, and I am anxiously awaiting the feature to roll out for RRF (hopefully supporting my Maestro board). But, I have had a suspicion that something in RRF is driving the steppers in a way that sets up a resonance.

                    1 Reply Last reply Reply Quote 1
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                      tpra @Hiroaki
                      last edited by 31 May 2021, 06:21

                      @hiroaki said in Wavy surface problem.:

                      @tpra Hello. That print result is excellent ! Can you show me a photo how your printer is constructed?

                      Hello, nothing crazy, it's a simple cartesian.
                      You can find pictures here : https://forum.duet3d.com/topic/21792/my-latest-duet-cartesian-printer
                      The Z drive has been completly modified since the pictures so it's closer to the one i designed on the funX4. Imho the printer would benefit a lot stronger and heavier frame. That"s why the next one will be a mix of the FunX4 Z and frame + RatRig's vcore3 XY carriage / EVA extruder holder.

                      @ccs86 said in Wavy surface problem.:

                      I am very curious to see this as well!

                      Input shaper benefits are pretty well established at this point, and I am anxiously awaiting the feature to roll out for RRF (hopefully supporting my Maestro board). But, I have had a suspicion that something in RRF is driving the steppers in a way that sets up a resonance.

                      Sorry it took time, i'm printing a no-input-shaper test with the exact same gcode used on the right picture of my comparison, will post results when i'm back at noon.
                      Tbh i don't think it has anything to do with input shaper. I also have the exact same suspicion as you about "something in RRF is driving the steppers in a way that sets up a resonance".

                      You know what makes me crazy with this ? the problem exists, and it's ignored. I don't even understand that seeing the comparison i posted above, no dev wondered or even asked me more informations.
                      I mean, it's not like if a guy who just got its first printer said "it's it does not work why???".
                      I thought the print quality spoke for itself. Clearly not. So why bother ? 🙂

                      undefined 1 Reply Last reply 31 May 2021, 15:54 Reply Quote 1
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                        CCS86 @tpra
                        last edited by CCS86 31 May 2021, 15:54

                        @tpra

                        I don't think it's a case of dev's ignoring an issue, so much as it is a slippery issue, which can be impacted/created by a multitude of variables, that nobody has truly nailed down to an actual issue within RRF.

                        I think you are in the best position ever to truly shine light on this, while ruling out any mechanical issues. An identical print, on the same machine & electronics, between RRF and Klipper (sans input shaper), should really get us closer to the core.

                        This is a thread I posted with similar complaints (periodic XY deviation). I never really found a solution, so much as I found ways to mitigate the issue (very high resolution STLs, very small gcode line segments, slower print speed). https://forum.duet3d.com/topic/21825/duet-maestro-struggling-to-produce-smooth-curves/33

                        undefined 1 Reply Last reply 31 May 2021, 16:48 Reply Quote 1
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                          Luke'sLaboratory @CCS86
                          last edited by 31 May 2021, 16:48

                          @ccs86 said in Wavy surface problem.:

                          Klipper

                          That's my plan for 2 weeks from now - I have a fast corexy that runs klipper on mini5+, and i'll be flopping between klipper and RRF to watch how it changes

                          Luke
                          http://lukeslab.online

                          1 Reply Last reply Reply Quote 3
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                            Duckers @Luke'sLaboratory
                            last edited by 4 Nov 2022, 23:50

                            @Luke-sLaboratory I gotta ask, sorry for replying to last year, but i face this problem. Can i ask if you use 2209 stepper drivers/interpolation with your steppers? Or are these stock?

                            undefined 1 Reply Last reply 25 Nov 2022, 19:01 Reply Quote 0
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                              Luke'sLaboratory @Duckers
                              last edited by 25 Nov 2022, 19:01

                              @Duckers Oh wow, been a long while!

                              I never got around to this experiment - its gotten to the point where I've switched from a duet mini5+ on klipper to a duet 6hc on klipper - the mini5+ used 2209's, and didn't really notice any changes between the mini and the 6hc, other than speed!

                              I don't use interpolation on either - experiments with encoders revealed small issues with positioning while using interpolation, but these are also very small!

                              Luke
                              http://lukeslab.online

                              1 Reply Last reply Reply Quote 0
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