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    levelling and mesh

    Scheduled Pinned Locked Moved Solved
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    • MikeDCundefined
      MikeDC @Phaedrux
      last edited by

      @phaedrux

      No i was using 0.02 I increased it to 0.024 where i was playing.

      it used to always be around 0.016 so 0.02 was enough
      now the lowest i can get it is 0.049 but more often it is anywhere between 0.071 and 0.11

      1 Reply Last reply Reply Quote 0
      • Phaedruxundefined
        Phaedrux Moderator
        last edited by Phaedrux

        If you do a repeated G30 S-1 test at your probe points are the results consistent?

        Is it possible to move the Z motors to the mainboard?

        Z-Bot CoreXY Build | Thingiverse Profile

        Marcossfundefined MikeDCundefined 2 Replies Last reply Reply Quote 0
        • Marcossfundefined
          Marcossf @Phaedrux
          last edited by

          @MikeDC @Phaedrux Have a look at the David's answer in our thread about CAN delays with external boards:

          @dc42 said:

          I have put preliminary firmware that resolves this issue at https://www.dropbox.com/sh/cx760ysonlzzkjd/AACfsVfX4olHipuqmbWut5EKa?dl=0. Please test this firmware with care because I have only tested it using Duet 3 MB6HC + EXP3HC (the Z motor was connected to the EXP3HC).

          If you are running your Duet with an attached Raspberry Pi then you must upgrade to RRF 3.4.0beta7 from the package server BEFORE you use these files.

          Unfortunately we couldn't test it yet, so it's a good start point to see if this issue is addresed.

          Best,

          rjenkinsgbundefined MikeDCundefined 3 Replies Last reply Reply Quote 1
          • rjenkinsgbundefined
            rjenkinsgb @Marcossf
            last edited by

            @marcossf

            One simple change that may help is just reduce the probing speed a lot, so any delays result in smaller errors.

            In the config you posted earlier it is 300; try 50 or even less and see how that works?

            I only use 60 even with a directly wired BLTouch!

            As long as the clearance height is not excessive, it should not make all that much difference in speed but could increase accuracy a lot.

            Robert J.

            Printers: Overlord pro, Kossel XL+ with Duet 6HC and "Frankentron", TronXY X5SA Pro converted to E3D toolchange with Duet 6HC and 1LC toolboards.

            MikeDCundefined 1 Reply Last reply Reply Quote 0
            • MikeDCundefined
              MikeDC @Phaedrux
              last edited by

              @phaedrux

              Ok with Z on the 3HC they was definately not consistent

              I have now moved the 2 Y motors temporarily to the 3HC and moved the 3 Z motors back to the mainboard

              74ba2dfb-c183-4711-8b30-eeb8f8ed7e52-image.png

              d2ce8b67-e06d-479b-b113-21882caebb55-image.png

              I think this is clearly showing it a 3HC can issue
              consistent probing even if its not the 0.016 i was getting previously
              but at least its not going as high as 0.71-0.11 now and look at the difference in the mesh, the 0.2mm difference front to back is gone.

              1 Reply Last reply Reply Quote 0
              • MikeDCundefined
                MikeDC @Marcossf
                last edited by

                This post is deleted!
                1 Reply Last reply Reply Quote 0
                • MikeDCundefined
                  MikeDC @Marcossf
                  last edited by

                  @marcossf said in levelling and mesh:

                  @MikeDC @Phaedrux Have a look at the David's answer in our thread about CAN delays with external boards:

                  @dc42 said:

                  I have put preliminary firmware that resolves this issue at https://www.dropbox.com/sh/cx760ysonlzzkjd/AACfsVfX4olHipuqmbWut5EKa?dl=0. Please test this firmware with care because I have only tested it using Duet 3 MB6HC + EXP3HC (the Z motor was connected to the EXP3HC).

                  If you are running your Duet with an attached Raspberry Pi then you must upgrade to RRF 3.4.0beta7 from the package server BEFORE you use these files.

                  Unfortunately we couldn't test it yet, so it's a good start point to see if this issue is addresed.

                  Best,

                  I will definately test these files next thankyou

                  1 Reply Last reply Reply Quote 1
                  • MikeDCundefined
                    MikeDC @rjenkinsgb
                    last edited by

                    @rjenkinsgb said in levelling and mesh:

                    @marcossf

                    One simple change that may help is just reduce the probing speed a lot, so any delays result in smaller errors.

                    In the config you posted earlier it is 300; try 50 or even less and see how that works?

                    I only use 60 even with a directly wired BLTouch!

                    As long as the clearance height is not excessive, it should not make all that much difference in speed but could increase accuracy a lot.

                    I have already tried this, It doesnt help the inconsistancy,
                    Thankyou for the suggestion tho

                    1 Reply Last reply Reply Quote 1
                    • engikeneerundefined
                      engikeneer @MikeDC
                      last edited by

                      @mikedc said in levelling and mesh:

                      If the motors are delaying then i cannot put x or y or e here either as they will all have differing issues.

                      I believe the firmware limitation is purely limited to probing moves as the motors will keep moving until the probe triggers and register their position (I.e. an unplanned event), whereas normal xy moves are all preplanned so can be synchronised between the boards. This seems to match what you are seeing

                      E3D TC with D3Mini and Toolboards.
                      Home-built CoreXY, Duet Wifi, Chimera direct drive, 2x BMG, 300x300x300 build volume
                      i3 clone with a bunch of mods

                      MikeDCundefined 1 Reply Last reply Reply Quote -1
                      • MikeDCundefined
                        MikeDC @engikeneer
                        last edited by

                        @engikeneer I agree,

                        I started a print around an hour ago, first one since i added the 3hc board.

                        with Z on the 3hc and the levels and mesh i dare not try printing,
                        but with the 2 Y motors on the board it seemed more stable so have started a print and so far its looking ok.

                        maybe one small alignment issue at the start of the print, between the brim and the part but i need to wait for it to finish to check it properly.

                        1 Reply Last reply Reply Quote 0
                        • MikeDCundefined
                          MikeDC
                          last edited by

                          It is fixed in B7+2 🙂
                          see my post here 🙂

                          https://forum.duet3d.com/topic/25720/g30-stop-values-increasing-each-time/26?_=1641577026578

                          to confirm, Z is back on 3HC and multiprobing each point is giving good results again.

                          1ff898ec-e00f-498a-85ec-5bfe6c70528d-image.png

                          5fdb28ba-84da-43a8-8c68-edcaa5b31450-image.png

                          Thankyou @Phaedrux and @dc42

                          1 Reply Last reply Reply Quote 1
                          • Phaedruxundefined Phaedrux marked this topic as a question
                          • Phaedruxundefined Phaedrux has marked this topic as solved
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