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    Corexy travel problems

    Tuning and tweaking
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    • godnemoz
      godnemoz last edited by

      I have built a corexy, when it travel just in x or y it travel just fine but when it moves in a diagonal it jurks an lose step or some thing (it doesnt travel to when it ment to)
      https://youtu.be/QpUAM4eJJbo
      any one have any idea
      cheers

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      • deckingman
        deckingman last edited by

        Pure X and pure Y moves use both motors whereas diagonal moves at 45 degrees use only one motor. So it's likely a problem when using just a single motor. Does it exhibit the same behaviour in both diagonal directions? i.e. front left to rear right but also front right to rear left? This will tell you if just one motor is affected or both. What size motors are they, what is the current rating of the motors and what current have you set them to use in config.g?

        Ian
        https://somei3deas.wordpress.com/
        https://www.youtube.com/@deckingman

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        • godnemoz
          godnemoz last edited by

          hi
          thank for the help
          moving from front to back from left to right to jurks in both directions
          moving front to back right to left to moves smoothly in both directions
          I have nema 17 0.9 1.7a motors running at 1.3a in software
          cheers

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          • deckingman
            deckingman last edited by

            So it's definitely to do with one motor, the one that does front to back, left to right. With the machine switched off, move the hot end diagonally in this direction and watch the belts. One motor will turn and the other will be static. the one that turns is the problem one. The first thing to check is that the pulley is held tight on the shaft and not slipping. If it is then it's most likely a wiring problem.

            Edit. Looking closely at the video, the pulley on the motor in the shot is either very misshapen or it's loose on the shaft.

            Ian
            https://somei3deas.wordpress.com/
            https://www.youtube.com/@deckingman

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            • godnemoz
              godnemoz last edited by

              Its funny how a lose grub screw after tighting makes all the difference.
              I cant thank you enought for your help,
              cheers
              https://youtu.be/mqxwj_fFxGs

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              • deckingman
                deckingman last edited by

                Glad you got it sorted. Out of interest, that looks like quite a large bed oblong bed but it might just be the camera angle. What size is it?

                Ian
                https://somei3deas.wordpress.com/
                https://www.youtube.com/@deckingman

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                • godnemoz
                  godnemoz last edited by

                  build area is X720 Y320 Z 800
                  With 3 hot ends, changible tools
                  diamond hot end
                  e3d volcano
                  direct drive with e3d hot end
                  so the hot ends get pick up as need in the print then droped off

                  I call it "Small Box"

                  https://youtu.be/gQeih0vUtak

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                  • deckingman
                    deckingman last edited by

                    Wow that's impressive. May I ask how the hot end is fixed to the carriage after it gets picked up?

                    Ian
                    https://somei3deas.wordpress.com/
                    https://www.youtube.com/@deckingman

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                    • Neotko
                      Neotko last edited by

                      Wow nice Foehnsturm-style magnetic changer!

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                      • godnemoz
                        godnemoz last edited by

                        @deckingman:

                        Wow that's impressive. May I ask how the hot end is fixed to the carriage after it gets picked up?

                        magnetics, holds real well

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                        • T3P3Tony
                          T3P3Tony administrators last edited by

                          That is awesome! Will you be sharing the design of the magnetic changer?

                          Cheers

                          Tony

                          www.duet3d.com

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                          • godnemoz
                            godnemoz last edited by

                            I guess I can after I get everything up and going

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