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    bad bed adhesion on one side after rff3 upgrade

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    Tuning and tweaking
    kossel bed leveling
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    • sungod3kundefined
      sungod3k
      last edited by

      Hi,

      I attempted a large print to that goes to the limits of my deltas bed. This was the first big print since I upgraded to rff 3 but it's possible that this issues existed before that.

      I have a normal kossel style delta and use the rff configurator which works great. The g32 results mostly come out great (Calibrated 6 factors using 16 points, (mean, deviation) before (-0.147, 0.076) after (-0.000, 0.071)). I usually don't use mesh level correction, but looking at it now I cant see any trend just some small up and downs.

      With this big print I'm noticing that one side (right corner) is much lower than the opposite site (left corner). Over the distance of 20cm id say at least 0.3mm. So much that one side gets smushed into the bed while the other side is so high up that it's not connecting correctly.
      The model is laying on the bed in a way that the lowest corner points towards one of the towers.

      2021-01-23 21.36.12.jpg

      The machine is not the most accurate construction but not that bad that g32 wouldnt be able to correct for it.
      I wonder how i could correct for that, or if rff3 corrects slightly different than rff2 did?

      http://www.42dimensions.de/
      https://printnewworlds.blogspot.com/

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      • Phaedruxundefined
        Phaedrux Moderator
        last edited by

        I'm not aware of any changes in RRF3 that would account for that.

        Can you post your config.g and config-override.g?
        Can you post your homedelta.g and bed.g?
        Can you post the entire gcode file or at least the first 50 or so lines of it?
        Can you send M122 and post the results?
        Can you send M98 P"config.g" and post the results?

        Z-Bot CoreXY Build | Thingiverse Profile

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        • sungod3kundefined
          sungod3k
          last edited by

          @Phaedrux said in bad bed adhesion on one side after rff3 upgrade:

          sure 🙂
          homedelta.g config-override.g config.g bed.g FirstLayerTestCircle.gcode M122.txt M98.txt

          http://www.42dimensions.de/
          https://printnewworlds.blogspot.com/

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          • Phaedruxundefined
            Phaedrux Moderator
            last edited by

            Do you use mesh compensation? Do you have an example heightmap image? Does it show a tilt?

            Z-Bot CoreXY Build | Thingiverse Profile

            sungod3kundefined 1 Reply Last reply Reply Quote 0
            • sungod3kundefined
              sungod3k @Phaedrux
              last edited by

              @Phaedrux 2021-01-24 11_24_35-Settings.jpg

              Havent used mesh bed levelling in some time now because it always worked without it.
              I did some test with mesh bed activated, but it didnt make a difference.

              http://www.42dimensions.de/
              https://printnewworlds.blogspot.com/

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              • Vetiundefined
                Veti
                last edited by

                M308 S0 P"bedtemp" Y"thermistor" T100000 B4138 ; configure sensor 0 as thermistor on pin bedtemp
                M308 S1 P"e0temp" Y"thermistor" T100000 B4138 ; configure sensor 1 as thermistor on pin e0temp

                your thermistor setting is incorrect. find the correct beta value in your thermistor documentation.

                sungod3kundefined 1 Reply Last reply Reply Quote 0
                • Phaedruxundefined
                  Phaedrux Moderator
                  last edited by

                  Can you show the heightmap on a more oblique angle? Dead on makes it hard to see the surface relief.

                  Z-Bot CoreXY Build | Thingiverse Profile

                  sungod3kundefined 1 Reply Last reply Reply Quote 0
                  • wummelfroschundefined
                    wummelfrosch
                    last edited by wummelfrosch

                    which sensor (Z-probe) is used ? maybe this is the fault ? I had such a similar problem with the optical sensor of DC on the green gfk print surface. The values were sometimes good and then again bad and partly implausible ! Only after switching to BlTouch did I have reproducible values.

                    1.Modified Prusa Style Printer:Duet2 Eth, 24V MW 750W, E3D Chimera+ Dual Wakü, 2x Bondt QR 500mm Bowden, 2x FTS 2.0 Sensor, BLTouch , 15mm CTC Linear Rails Y-Axis, 2xKGT-12x4 Z-Axis,10mm Linear X-Axis, Laing DDC Pump,120mm Radiator 2.Bcn3d Sigma R19

                    sungod3kundefined 1 Reply Last reply Reply Quote 1
                    • sungod3kundefined
                      sungod3k @Veti
                      last edited by

                      @Veti youre right. i corrected the beta, but i dont see a difference in heated behavior

                      http://www.42dimensions.de/
                      https://printnewworlds.blogspot.com/

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                      • sungod3kundefined
                        sungod3k @wummelfrosch
                        last edited by

                        @wummelfrosch i use the smart effector, has served me well so far. and reproducibility is good as far as i can judge it.

                        http://www.42dimensions.de/
                        https://printnewworlds.blogspot.com/

                        sungod3kundefined 1 Reply Last reply Reply Quote 0
                        • Phaedruxundefined
                          Phaedrux Moderator
                          last edited by

                          http://boim.com/DeltaUtil/CalDoc/Calibration.html

                          See if you can identify any issues by comparing your heightmap to these.

                          Z-Bot CoreXY Build | Thingiverse Profile

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                          • sungod3kundefined
                            sungod3k @Phaedrux
                            last edited by

                            @Phaedrux 2021-01-25 19_22_41-MyDelta.jpg

                            http://www.42dimensions.de/
                            https://printnewworlds.blogspot.com/

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                            • sungod3kundefined
                              sungod3k @sungod3k
                              last edited by sungod3k

                              @Phaedrux yes, i remember this post. it looks like the examples where one tower is different from the others. but endstop adjustment during g32 should be simple enough, or what could throw off the calibration algo that much?

                              http://www.42dimensions.de/
                              https://printnewworlds.blogspot.com/

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                              • Phaedruxundefined
                                Phaedrux Moderator
                                last edited by

                                I'm afraid that's the extent of my delta knowledge.

                                Best I can suggest is to go through the setup and calibration guides carefully and ensure the build is accurate.

                                https://duet3d.dozuki.com/Wiki/ConfiguringRepRapFirmwareDeltaPrinter
                                https://duet3d.dozuki.com/Wiki/Calibrating_a_delta_printer

                                Overall it appears to be fairly level, but oddly bumpy and maybe bowled a bit.

                                Z-Bot CoreXY Build | Thingiverse Profile

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                                • Vetiundefined
                                  Veti
                                  last edited by

                                  that looks a bit like a ripple effect that is caused by backlash.
                                  check the belts and pulleys.

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                                  • Phaedruxundefined
                                    Phaedrux Moderator
                                    last edited by

                                    Yes maybe backlash. @sungod3k can you provide a screen shot showing an isometric view?

                                    Z-Bot CoreXY Build | Thingiverse Profile

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