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    ZA and ZB connections ?

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    • Phaedruxundefined
      Phaedrux Moderator
      last edited by

      You can put everything in your slicer gcode if you want it to run before the print every time.

      You can use G32 for the leveling tilt first, and then do a g29 to map the surface of the bed. The g29 could be within bed.g and called as part of G32 (which just calls bed.g) or you could have it as a separate command in the slicer start gcode. Up to you. But it is important to correct for tilt before doing the mesh compensation.

      Z-Bot CoreXY Build | Thingiverse Profile

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      • Phaedruxundefined
        Phaedrux Moderator
        last edited by

        More simply:

        Slicer start gcode:

        G28 ; home the printer
        G32 ; level for tilt
        G29 ; mesh bed compensation mapping
        

        Z-Bot CoreXY Build | Thingiverse Profile

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        • Rudy2Aundefined
          Rudy2A @Phaedrux
          last edited by

          @Phaedrux said in ZA and ZB connections ?:

          Vous pouvez tout mettre dans votre gcode slicer si vous voulez qu'il s'exécute à chaque fois avant l'impression.
          Vous pouvez d'abord utiliser G32 pour l'inclinaison de mise à niveau, puis faire un g29 pour cartographier la surface du lit. Le g29 peut être dans bed.g et appelé dans le cadre de G32 (qui appelle simplement bed.g) ou vous pouvez l'avoir comme une commande distincte dans le slicer start gcode. Dépend de vous. Mais il est important de corriger l'inclinaison avant de faire la compensation de maillage.

          Thank you, quick and precise !!!

          This forum is like Duet material, that is to say of quality !!!

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          • dc42undefined
            dc42 administrators @Veti
            last edited by

            @Veti said in ZA and ZB connections ?:

            if you run G32 then you need to run a G29 and not a G29 S1.

            It's quite in order to run G32 to correct for loss of sync of the Z motors, followed by G29 S1 to load a height map to compensate for gantry sag and any undulations in the bed surface.

            Duet WiFi hardware designer and firmware engineer
            Please do not ask me for Duet support via PM or email, use the forum
            http://www.escher3d.com, https://miscsolutions.wordpress.com

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            • Rudy2Aundefined
              Rudy2A
              last edited by

              Happy New Year everyone !

              I spoke too quickly ... I realized that when I wanted to print large pieces the leveling of the bed did not work finally!

              While searching the forum, I found a case very close to mine, but unfortunately that has apparently not been resolved!

              https://forum.duet3d.com/topic/725/still-having-problems-with-bed-compensation-with-the-dc42-probe?_=1578077431668

              However, I would point out that before my mini IR probe, I had a BLTouch and the problem was the same!

              Thank you.

              dc42undefined 1 Reply Last reply Reply Quote 0
              • dc42undefined
                dc42 administrators @Rudy2A
                last edited by

                @Rudy2A said in ZA and ZB connections ?:

                I spoke too quickly ... I realized that when I wanted to print large pieces the leveling of the bed did not work finally!

                Are you now using G32 to level the two sides of the bed, with the two Z motors connected to separate drivers? If so, after running G32, do you then get a level height map if you run G29 S0 ?

                Duet WiFi hardware designer and firmware engineer
                Please do not ask me for Duet support via PM or email, use the forum
                http://www.escher3d.com, https://miscsolutions.wordpress.com

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                • Rudy2Aundefined
                  Rudy2A @dc42
                  last edited by

                  @dc42 said in ZA and ZB connections ?:

                  Utilisez-vous maintenant G32 pour niveler les deux côtés du lit, avec les deux moteurs Z connectés à des pilotes séparés? Si oui, après avoir exécuté G32, obtenez-vous une carte de hauteur de niveau si vous exécutez G29 S0?

                  Need details ...

                  Capture d’écran 2020-01-04 à 23.37.52.png

                  When I look at my height map, I see that the corner in front on the left (near the arrows XYZ) is too high! So, if I understood correctly, I must lower my bed on this side using the adjusting screw. However if I look at my test print which is in the same place, the deposit of the PLA is too high and does not really stick to 100% on my bed, which could indicate that I should assemble my bed!
                  What does the grid (reference model) represent perfectly straight on my height map and what does the green part (for me) represent?

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                  • Rudy2Aundefined
                    Rudy2A @dc42
                    last edited by

                    @dc42 said in ZA and ZB connections ?:

                    Are you now using G32 to level the two sides of the bed, with the two Z motors connected to separate drivers? If so, after running G32, do you then get a level height map if you run G29 S0 ?

                    Yes absolutely, I use the two separate Z pilots ... G32 then G29 ...

                    But the problem is that, even if I adjust my bed in any way after doing G32 and G29, the result remains the same! It is as if the correction of my bed keeps in mind the error of the departure! Difficult to explain ! But, I find myself after the correction with the same faults (in the same place as at the start) without any correction having been made and yet I see perfectly moving the Z differently.

                    Phaedruxundefined 1 Reply Last reply Reply Quote 0
                    • Phaedruxundefined
                      Phaedrux Moderator @Rudy2A
                      last edited by

                      @Rudy2A your mesh would benefit from more points. It's fairly sparse.

                      Z-Bot CoreXY Build | Thingiverse Profile

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                      • Rudy2Aundefined
                        Rudy2A @Phaedrux
                        last edited by

                        @Phaedrux said in ZA and ZB connections ?:

                        votre maillage bénéficierait de plus de points. C'est assez clairsemé.

                        For the sake of understanding, I prefer to use the P of M557 than S
                        M557 X11: 250 Y11: 252 P4
                        What would be the P value to make it more meaningful?

                        Rudy2Aundefined 1 Reply Last reply Reply Quote 0
                        • Rudy2Aundefined
                          Rudy2A @Rudy2A
                          last edited by

                          @Rudy2A said in ZA and ZB connections ?:

                          votre maillage bénéficierait de plus de points. C'est assez clairsemé.

                          Par souci de compréhension, je préfère utiliser le P de M557 que S
                          M557 X11: 250 Y11: 252 P4
                          Quelle serait la valeur P pour la rendre plus significative?

                          My bed is 300X300

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                          • Phaedruxundefined
                            Phaedrux Moderator
                            last edited by

                            Try double?

                            Z-Bot CoreXY Build | Thingiverse Profile

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                            • Rudy2Aundefined
                              Rudy2A @Phaedrux
                              last edited by

                              @Phaedrux said in ZA and ZB connections ?:

                              Essayez double?

                              Here, I get this result from M557 P4 to P8 ...

                              Capture d’écran 2020-01-05 à 00.52.12.png

                              The worst part is that by looking for solutions to my problem on the forum, I found quite a few cases similar to mine, but each time, the cases were not resolved or were not commented on final solution, it's a shame!

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                              • Rudy2Aundefined
                                Rudy2A @Rudy2A
                                last edited by

                                As I said a little higher ... No matter the result of my height map by making a G29S0! My first layer does not receive any correction, the impression always remains identical in all the tests (and yet the height maps are never identical) ... same defect in the same place, it is frankly annoying not to understand!

                                Vetiundefined 1 Reply Last reply Reply Quote 0
                                • DIY-O-Sphereundefined
                                  DIY-O-Sphere
                                  last edited by

                                  How are the motors connected to the leadscrews? Can you please attach a picture?

                                  (UTC+1)

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                                  • Rudy2Aundefined
                                    Rudy2A @DIY-O-Sphere
                                    last edited by

                                    @DIY-O-Sphere said in ZA and ZB connections ?:

                                    Comment les moteurs sont-ils connectés aux vis-mères? Pouvez-vous joindre une photo?

                                    Like this...

                                    IMG_0230.JPG

                                    DIY-O-Sphereundefined 1 Reply Last reply Reply Quote 0
                                    • Phaedruxundefined
                                      Phaedrux Moderator
                                      last edited by

                                      Do you see the Z axis turning while it's printing?

                                      Z-Bot CoreXY Build | Thingiverse Profile

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                                      • Rudy2Aundefined
                                        Rudy2A @Phaedrux
                                        last edited by

                                        @Phaedrux said in ZA and ZB connections ?:

                                        Voyez-vous l'axe Z tourner pendant l'impression?

                                        Yes absolutely, my CoreXY printer (it's my moving bed) has 2 Z axes. One Z on Za and the other on E1, I can see my Z axes turning indifferently during my print tests ...

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                                        • Vetiundefined
                                          Veti @Rudy2A
                                          last edited by

                                          @Rudy2A said in ZA and ZB connections ?:

                                          As I said a little higher ... No matter the result of my height map by making a G29S0! My first layer does not receive any correction, the impression always remains identical in all the tests (and yet the height maps are never identical) ... same defect in the same place, it is frankly annoying not to understand!

                                          can you post a picture of the first layer?

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                                          • DIY-O-Sphereundefined
                                            DIY-O-Sphere @Rudy2A
                                            last edited by DIY-O-Sphere

                                            @Rudy2A
                                            I hate those types of couplers, as they behave like a spring.
                                            But I think that in your case, the lead screw is fixed in Z by the upper bearing.

                                            d2982f35-76fa-4838-b1d2-2f03f8f1a946-grafik.png

                                            (UTC+1)

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