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    Why first move of tue bed leveling is going up?

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    • fcwiltundefined
      fcwilt @Arisoy
      last edited by

      @arisoy said in Why first move of tue bed leveling is going up?:

      @fcwilt The paramater was already H5 so I tried H2 But no change. I set it back to H5.

      Thanks.

      Let's try the suggestion posted previously.

      Add G90 G1 X155 Y150 Z10 before the set of three G30 commands in your bed.g file and report the behavior.

      Thanks.

      Frederick

      Printers: A FT-5 with the 713 upgrade bits, a custom MarkForged style, a small Utilmaker style, a small CoreXY from kit and a E3D MS/TC setup. Various hotends. Using Duets (2 and 3) running 3.4.6

      Arisoyundefined 1 Reply Last reply Reply Quote 1
      • Arisoyundefined
        Arisoy @fcwilt
        last edited by

        @fcwilt I already did it. And after this positioning command "G90 G1 X155 Y150 Z10" the bed did a fast move up while the bltouch is going to the first probe point then wait for the probe to be in the good place and finally did the probing work.

        fcwiltundefined 1 Reply Last reply Reply Quote 0
        • infiniteloopundefined
          infiniteloop
          last edited by

          @arisoy said in Why first move of tue bed leveling is going up?:

          For one, you can increment the dive height.

          I don't know how to do that. Can you tell me please.

          Look at my first post in this thread.

          1 Reply Last reply Reply Quote 0
          • fcwiltundefined
            fcwilt @Arisoy
            last edited by

            @arisoy said in Why first move of tue bed leveling is going up?:

            @fcwilt I already did it. And after this positioning command "G90 G1 X155 Y150 Z10" the bed did a fast move up while the bltouch is going to the first probe point then wait for the probe to be in the good place and finally did the probing work.

            Thanks.

            Please change the Z10 to Z20 and see how that affects the behavior.

            It may help to post a video of what you are seeing to be sure we all understand what is happening.

            Thanks.

            Frederick

            Printers: A FT-5 with the 713 upgrade bits, a custom MarkForged style, a small Utilmaker style, a small CoreXY from kit and a E3D MS/TC setup. Various hotends. Using Duets (2 and 3) running 3.4.6

            Arisoyundefined 1 Reply Last reply Reply Quote 0
            • Arisoyundefined
              Arisoy @fcwilt
              last edited by

              @fcwilt Ok so i homed all axis and then i take a video from what happened.

              I started the video and just after i send the G32 command.

              As you can see at first the bed moves up. I don't want that at all. I want the probe to go at his place first and then the bed can moves up.

              link text

              infiniteloopundefined fcwiltundefined 2 Replies Last reply Reply Quote 0
              • infiniteloopundefined
                infiniteloop @Arisoy
                last edited by

                @arisoy Split the G1 movement in two:

                1. Move X/Y to whatever point you want
                2. Lower Z to 10 or 20 mm

                Possibly you can omit Z completely - at the moment, I can't verify that …

                Arisoyundefined 1 Reply Last reply Reply Quote 0
                • fcwiltundefined
                  fcwilt @Arisoy
                  last edited by

                  @arisoy said in Why first move of tue bed leveling is going up?:

                  @fcwilt Ok so i homed all axis and then i take a video from what happened.

                  I started the video and just after i send the G32 command.

                  As you can see at first the bed moves up. I don't want that at all. I want the probe to go at his place first and then the bed can moves up.

                  link text

                  Thanks.

                  I went and watched my printer and it does what yours is doing. That initial Z movement prior to the first probe has never caused me any issues.

                  You could adjust the initial G1 to move to the first probe XY point.

                  Frederick

                  Printers: A FT-5 with the 713 upgrade bits, a custom MarkForged style, a small Utilmaker style, a small CoreXY from kit and a E3D MS/TC setup. Various hotends. Using Duets (2 and 3) running 3.4.6

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                  • Arisoyundefined
                    Arisoy @infiniteloop
                    last edited by

                    @infiniteloop I did it. I split the G1 in two. The G1 command works fine.

                    But after that the G30 command moves the bed up again and fast close to the probe. And then the probing starts.

                    So if the bed is not leveled the bed will crash to the probe during this first fast move.

                    I don't want to add some mouvement before the bed moves up fast. I want it to not do that. It should probe directly not move up first.

                    Like it's done when you home your printer. When homing the Z i can start it from the bottom and the bed will slowly search the probe. It wil not move fast and then start to probe.

                    fcwiltundefined 1 Reply Last reply Reply Quote 0
                    • fcwiltundefined
                      fcwilt @Arisoy
                      last edited by

                      @arisoy said in Why first move of tue bed leveling is going up?:

                      @infiniteloop I did it. I split the G1 in two. The G1 command works fine.

                      But after that the G30 command moves the bed up again and fast close to the probe. And then the probing starts.

                      So if the bed is not leveled the bed will crash to the probe during this first fast move.

                      I don't want to add some mouvement before the bed moves up fast. I want it to not do that. It should probe directly not move up first.

                      Like it's done when you home your printer. When homing the Z i can start it from the bottom and the bed will slowly search the probe. It wil not move fast and then start to probe.

                      A Z probe can have this issue with a bed setup like yours (and mine).

                      I dealt with it by having a Z endstop switch for each Z axis.

                      See this video which starts with the bed way out of level. It homes and "levels" using the Z endstops. At the point it is level enough that the Z probe can always do the final leveling without issue.

                      Bed Leveling

                      You might try adjusting the H5 parameter to H10 or H15 to see how that affects the behavior.

                      Frederick

                      Printers: A FT-5 with the 713 upgrade bits, a custom MarkForged style, a small Utilmaker style, a small CoreXY from kit and a E3D MS/TC setup. Various hotends. Using Duets (2 and 3) running 3.4.6

                      Arisoyundefined 1 Reply Last reply Reply Quote 0
                      • Arisoyundefined
                        Arisoy @fcwilt
                        last edited by

                        @fcwilt Ok i think i'll maybe do the Z home like this too.

                        Thanks you all for your patience and for your help 🙂 🙂

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