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    HomeZ with sensor

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    • fcwiltundefined
      fcwilt
      last edited by

      I always have.

      I only load the height map at the start of a print.

      And I unload it at the end of the print.

      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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      • Vetiundefined
        Veti
        last edited by

        no you need to establish z=0 (G30) before loading a heightmap

        pcsentinelundefined 1 Reply Last reply Reply Quote 0
        • pcsentinelundefined
          pcsentinel @Veti
          last edited by

          @Veti
          Hi, that's what the code does,

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          • Vetiundefined
            Veti
            last edited by

            homing unloads the height map.

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

              @Veti said in HomeZ with sensor:

              homing unloads the height map.

              Hi,

              I know that has changed in the past so I checked it just to be safe - this was with firmware 3.1.1 AND 3.2.0

              I executed G29 S1 and verified with the DWC that mesh compensation was in use.

              Then I executed:

              • G90 G1 Z25 F600 ; to be sure the end stop sensors were not triggered
              • G91 G1 H1 Z-30 F300 ; one slow speed homing move

              I checked via the DWC and mesh compensation was still in use.

              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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              • Vetiundefined
                Veti
                last edited by

                try a G28 Z. that has a different meaning

                fcwiltundefined 2 Replies Last reply Reply Quote 0
                • fcwiltundefined
                  fcwilt @Veti
                  last edited by

                  @Veti said in HomeZ with sensor:

                  try a G28 Z. that has a different meaning

                  Will do.

                  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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                  • fcwiltundefined
                    fcwilt @Veti
                    last edited by

                    @Veti said in HomeZ with sensor:

                    try a G28 Z. that has a different meaning

                    OK I renamed my existing homeZ.g file and created a new one just with:

                    G90
                    G1 H2 Z25 F600
                    G91
                    G1 H1 Z-30 F300
                    G90

                    Same result. The DWC reported mesh compensation was still in use.

                    Glad to do more tests.

                    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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                    • Vetiundefined
                      Veti
                      last edited by

                      maybe i got it confused with marlin

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

                        @Veti said in HomeZ with sensor:

                        maybe i got it confused with marlin

                        I have trouble keeping things straight as the "side effects" of various commands have changed over time.

                        So I now just do everything explicitly in my code.

                        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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                        • Vetiundefined
                          Veti
                          last edited by

                          but thinking about it.

                          even if you are rehoming and an offset would be applied. the point where you homed should be 0 anyway

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                          • pcsentinelundefined
                            pcsentinel
                            last edited by

                            Hi, just coming back to the original point,

                            are you saying that I don't need to use G29 S2 and G29 S1 as that is already explicit in the Home functionality?

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

                              @pcsentinel said in HomeZ with sensor:

                              Hi, just coming back to the original point,

                              are you saying that I don't need to use G29 S2 and G29 S1 as that is already explicit in the Home functionality?

                              You may still need to use G29 S1 and G29 S2.

                              I tested firmware 3.1.1 and homing does not affect the state of mesh compensation. I will test 3.2 if that applies to you.

                              The "side effects of certain commands have changed over time BUT it is always safe to do things explicitly rather than depend on "side effects".

                              The worse that happens is you issue a command that is redundant.

                              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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                              • Phaedruxundefined
                                Phaedrux Moderator
                                last edited by

                                I think it would be best practice to clear any bed transformations before trying to reset Z0 with homing or doing a G29, etc.

                                Z-Bot CoreXY Build | Thingiverse Profile

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