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    Z-probe commissioning problem

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    Smart effector for delta printers
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    • RGN01undefined
      RGN01
      last edited by

      Cable is good, no bad crimps and no crossed wires - they are in the same order on both ends.

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      • number40fanundefined
        number40fan
        last edited by

        What type of motors, pulleys and belts are you running? Reason I ask is your M92 numbers are goofy.

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        • RGN01undefined
          RGN01
          last edited by

          @number40fan:

          What type of motors, pulleys and belts are you running? Reason I ask is your M92 numbers are goofy.

          Motors are 17HM19-2004S, pulleys 16-tooth GT2, belt GT2

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          • number40fanundefined
            number40fan
            last edited by

            Thanks. You're ok then. Just looked off to me having only ran 20 toothed pulleys.

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            • RGN01undefined
              RGN01
              last edited by

              Since deleting those two files, issuing a G30 seems to put the printer into a 'frozen' Busy state and only a power reset or emergency stop seems to allow it to move again.

              The status near to the Emergency Stop in the top right corner changes to Busy and nothing moves after that.

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              • RGN01undefined
                RGN01
                last edited by

                @number40fan:

                Thanks. You're ok then. Just looked off to me having only ran 20 toothed pulleys.

                Phew, thank goodness for that! Thanks for checking and pointing it out anyway!

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                • number40fanundefined
                  number40fan
                  last edited by

                  Have you changed the H number yet? Just wonder if it is freaking out because your homed height is greater than what your config is.

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                  • number40fanundefined
                    number40fan
                    last edited by

                    M665 R246.6 L440.0 B180 H443

                    Try this and see what happens.

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                    • RGN01undefined
                      RGN01
                      last edited by

                      @number40fan:

                      Have you changed the H number yet? Just wonder if it is freaking out because your homed height is greater than what your config is.

                      Yes, if I manually lower the nozzle from homed position it stops at bed height so that seems OK.

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                      • RGN01undefined
                        RGN01
                        last edited by

                        @number40fan:

                        M665 R246.6 L440.0 B180 H443

                        Try this and see what happens.

                        I have that already - after changing it earlier.

                        In an effort to fix the 'freezing' problem, I replaced deployprobe.g - it now reacts to the G30 command without freezing - but the original problem returns and it ignores a touch on the nozzle during the G30 operation.

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                        • number40fanundefined
                          number40fan
                          last edited by

                          Notes from the Wiki.

                          Version 1.19

                          Upgrade notes from version 1.18.2:
                          •Recommended DuetWebControl version is 1.19
                          •Recommended DuetWiFiServer version is 1.19
                          •Important! If you use an IR Z probe or some other type that does not need to be deployed, delete the files sys/deployprobe and sys/retractprobe.g if they exist, because they are now called automatically. You can do this in the System Files Editor of the web interface.

                          You do need those two files removed, so your issue is somewhere else.

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                          • number40fanundefined
                            number40fan
                            last edited by

                            So, now when the nozzle is at the bed, the web interface reads 0 for Z height?

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                            • RGN01undefined
                              RGN01
                              last edited by

                              @number40fan:

                              Notes from the Wiki.

                              Version 1.19

                              Upgrade notes from version 1.18.2:
                              •Recommended DuetWebControl version is 1.19
                              •Recommended DuetWiFiServer version is 1.19
                              •Important! If you use an IR Z probe or some other type that does not need to be deployed, delete the files sys/deployprobe and sys/retractprobe.g if they exist, because they are now called automatically. You can do this in the System Files Editor of the web interface.

                              You do need those two files removed, so your issue is somewhere else.

                              If I remove deployprobe.g then I get the freezing issue. It contains the following:

                              [[language]]
                              ; Probe deployment routine for Mini Kossel
                              M564 S0					; don't apply limits
                              G1 X25 Y93 Z40 F10000	; put probe arm next to belt
                              G1 X-5 F500				; move probe arm across belt
                              G1 X12 F1000			; move probe back
                              G1 X0 Y0 F10000			; move to somewhere sensible
                              M564 S1					; apply limits again
                              
                              

                              With that file in place, it seems to execute the commands, then probes the bed (green LED flash) and then stops with z=-0.1. Without that file it does none of those operations and enters a permanently busy state.

                              I will try and comment those lines out 1 by 1 to find which one is required to make G30 work.

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                              • number40fanundefined
                                number40fan
                                last edited by

                                @RGN01:

                                I've also homed the printer and slowly dropped the nozzle until it just touches the bed. The Z-height readings were:
                                Homed: 645.0
                                Touching bed: 212.5

                                This is what I don't get. When you home a printer, it doesn't count how far it moved until it activates the endstop switches. It just moves until it hits them, backs off, moves slowly until it hits again and usually moves away 5mm or so. That is your homed height. The Duet then uses your H number from M665 to determine how far above the bed the nozzle is. How was yours showing 645 with 550 in the M665? Do you have a config-override.g file?

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                                • RGN01undefined
                                  RGN01
                                  last edited by

                                  @number40fan:

                                  @RGN01:

                                  I've also homed the printer and slowly dropped the nozzle until it just touches the bed. The Z-height readings were:
                                  Homed: 645.0
                                  Touching bed: 212.5

                                  This is what I don't get. When you home a printer, it doesn't count how far it moved until it activates the endstop switches. It just moves until it hits them, backs off, moves slowly until it hits again and usually moves away 5mm or so. That is your homed height. The Duet then uses your H number from M665 to determine how far above the bed the nozzle is. How was yours showing 645 with 550 in the M665? Do you have a config-override.g file?

                                  Yes, there is a config-override.g file with a warning not to edit it as it is machine generated.

                                  With the deployprobe.g file as below, G30 seems to work (although it does leave the nozzle at -0.1)

                                  [[language]]
                                  G1 X0 Y0 F25000			; move to somewhere sensible
                                  
                                  

                                  Without that file, or with that line commented out, G30 does not work.

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                                  • MoS-tekknixundefined
                                    MoS-tekknix
                                    last edited by

                                    Do you have a config-override.g file?

                                    Good point, that is always pain in the ass if you forget it 😉

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                                    • number40fanundefined
                                      number40fan
                                      last edited by

                                      Can you paste what is in it?

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                                      • MoS-tekknixundefined
                                        MoS-tekknix
                                        last edited by

                                        Please show us your config-override.g

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                                        • RGN01undefined
                                          RGN01
                                          last edited by

                                          @number40fan:

                                          @RGN01:

                                          I've also homed the printer and slowly dropped the nozzle until it just touches the bed. The Z-height readings were:
                                          Homed: 645.0
                                          Touching bed: 212.5

                                          This is what I don't get. When you home a printer, it doesn't count how far it moved until it activates the endstop switches. It just moves until it hits them, backs off, moves slowly until it hits again and usually moves away 5mm or so. That is your homed height. The Duet then uses your H number from M665 to determine how far above the bed the nozzle is. How was yours showing 645 with 550 in the M665? Do you have a config-override.g file?

                                          OK, just realised that was a typo - 645 should have been 445. I'm really sorry for the confusion!

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                                          • MoS-tekknixundefined
                                            MoS-tekknix
                                            last edited by

                                            No need to say sorry for anything. Still interessted in the override-settings….

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