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    Duet 3 6HC with Openbuilds XYZ Probe

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    • Yveskeundefined
      Yveske @dc42
      last edited by

      @dc42 Installation went ok this time.
      The probe doesn't move while executing M675 (not from macro and not from DWC) and displays a red popup "Probe was not triggered during probing move"

      ; Touch probe.g
      ; called to find workpiece bottom left corner via G38.2
      ;
      
      ; Display message without time-out and allow to position the bit
      M291 T-1 S3 X1 Y1 Z1 P"Make sure the bit is positioned in the hole of the touch probe well beneath the top surface" R"Touch probe"
      
      ; Find center of cavity
      M675 X R8 F100 P0                 ; Find center in X axis
      M675 Y R8 F100 P0                 ; Find center in Y axis
      
      ; Set bit above center of probe
      G0 Z15                            ; rapid move Z axis 15 mm
      G0 X27 Y27                        ; rapid move X and Y axis to middle of probe
      
      ; Probe Z component
      G38.2 Z-15 F100                   ; seek until the probe circuit is closed Z-axis -15 mm
      
      ; Return bit to center of hole
      G0 Z15                            ; rapid move Z axis 15 mm
      G0 X-27 Y-27                      ; rapid move X and Y axis to center of cavity
      G0 Z-15                           ; rapid move Z axis -15 mm
      
      G10 P0 L20 X0 Y0 Z10              ; store relative probe offset for coordinates system 0
      
      1 Reply Last reply Reply Quote 0
      • dc42undefined
        dc42 administrators
        last edited by

        Odd, it's working for me. Have you checked that the Z probe reading in DWC reads 0 when the probe is not triggered, and 1000 when it is triggered?

        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

        Yveskeundefined 3 Replies Last reply Reply Quote 0
        • Yveskeundefined
          Yveske @dc42
          last edited by

          @dc42 Sorry, will have to check further this afternoon, have to run now...

          1 Reply Last reply Reply Quote 0
          • Yveskeundefined
            Yveske @dc42
            last edited by

            @dc42 I don't see the probe on screen with the new (beta) CNC UI.
            Is there a way to revert to the old CNC UI?

            b63f173c-d00c-4aa3-96d8-c426e3fcc1e4-image.png

            Sindariusundefined 1 Reply Last reply Reply Quote 0
            • Sindariusundefined
              Sindarius @Yveske
              last edited by

              @Yveske you’ll just need to install the current dwc to replace the dwc-cnc version

              Yveskeundefined 1 Reply Last reply Reply Quote 0
              • Yveskeundefined
                Yveske @Sindarius
                last edited by

                @Sindarius Thanks !!!

                1 Reply Last reply Reply Quote 0
                • Yveskeundefined
                  Yveske @dc42
                  last edited by

                  @dc42 Success !!!
                  It works but only after homing.

                  Thanks a lot !!!

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

                    Thanks, I'll add an error message if you use M675 before the axis is flagged as having been homed.

                    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

                    1 Reply Last reply Reply Quote 0
                    • Yveskeundefined
                      Yveske
                      last edited by

                      Tested 3.3RC2 and the touch probe is still working 👍 👍 👍

                      Just wanted to share my final version of my touch probe macro

                      ; Touch probe.g
                      ; called to find workpiece bottom left corner via G38.2 and M675
                      ;
                      ; If the printer hasn't been homed, home it
                      if !move.axes[0].homed || !move.axes[1].homed || !move.axes[2].homed
                        G28
                      
                      ; Display message without time-out and allow to position the bit
                      M291 T-1 S3 X1 Y1 Z1 P"Make sure the bit is positioned in the hole of the touch probe well beneath the top surface" R"Touch probe"
                      
                      ; Find center of cavity
                      M675 X R8 F100 K0                 ; Find center in X axis
                      M675 Y R8 F100 K0                 ; Find center in Y axis
                      
                      ; Set bit above center of probe
                      G91                               ; relative positioning
                      G0 Z15                            ; rapid move Z axis 15 mm
                      G0 X27 Y27                        ; rapid move X and Y axis to middle of probe
                      
                      ; Probe Z component
                      G38.2 Z-25                        ; seek until the probe circuit is closed Z-axis 25 mm
                      
                      ; Return bit to center of hole
                      G0 Z15                            ; rapid move Z axis 15 mm
                      G0 X-27 Y-27                      ; rapid move X and Y axis to center of cavity
                      G0 Z-10                           ; rapid move Z axis -10 mm
                      
                      G10 P1 L20 X0 Y0 Z15              ; store relative probe offset for coordinates system 1
                      
                      
                      CthulhuLabsundefined 1 Reply Last reply Reply Quote 2
                      • CthulhuLabsundefined
                        CthulhuLabs @Yveske
                        last edited by CthulhuLabs

                        @yveske In 3.3rc3 G38.2 moves towards an absolute machine position. So:

                        G38.2 Z-25
                        

                        Is trying to move to absolute position -25 Z. It is not move down 25 millimeters. As such if you are at a position below -25 Z your G38.2 will actually move up and away from the probe not down. The way I fixed this is to set it to:

                        G38.2 Z-500
                        

                        which is greater than my Z travel down. Only problem would be that if my probe does not trigger for some reason my spindle is going to crash into the work piece and try to keep going. Here is my version:

                        var ProbeThickness = 13;
                        var ProbeXWidth = 58;
                        var ProbeYWidth = 58;
                        var CoordSystem	= 20;
                        
                        ; If the printer hasn't been homed, home it
                        if !move.axes[0].homed || !move.axes[1].homed || !move.axes[2].homed
                        	G28
                        
                        M291 P"Insert a Dowel Pin into your spindle and center it in the probes hole" R"Probing" S3 X1 Y1 Z1
                        
                        ; Find center of cavity
                        M675 X R2 F300 K0						; Find center in X axis
                        M675 Y R2 F300 K0						; Find center in Y axis
                        
                        G10 P1 L{var.CoordSystem} X0 Y0					; Store X and Y as zero in CoordSystem
                         
                        ; Set bit above center of probe
                        G91								; relative positioning
                        G0 Z{var.ProbeThickness + 2}					; rapid move Z axis over the surface of the probe
                        G0 X{var.ProbeXWidth / 2} Y{var.ProbeYWidth / 2}		; rapid move X and Y axis to middle of probe
                         
                        ; Probe Z component
                        G38.2 Z-500							; seek down till you hit the probe
                        G0 Z5								; rapid move Z axis 5 mm
                        
                        G10 P1 L{var.CoordSystem} Z{var.ProbeThickness + 5}             ; store relative probe offset for coordinates system 1
                        G0 X{(var.ProbeXWidth / 2) * -1} Y{(var.ProbeYWidth / 2) * -1}	; go back over the hole
                        
                        G90								; Absolute positioning
                        

                        @dc42 Is this intended behavior? If so would it be possible to add an option to do relative moves or for G38.2 to recognize whether you have the machine in relative positioning mode or absolute positioning mode. I would like G38.2 to only probe down by the thickness of the probe plus 2mm which should ensure it makes contact assuming everything is setup correctly. If not it should not really collide with anything.

                        Yveskeundefined dc42undefined 2 Replies Last reply Reply Quote 0
                        • Yveskeundefined
                          Yveske @CthulhuLabs
                          last edited by

                          @cthulhulabs Thanks, wouldn't have caught that !

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

                            @cthulhulabs said in Duet 3 6HC with Openbuilds XYZ Probe:

                            @dc42 Is this intended behavior? If so would it be possible to add an option to do relative moves or for G38.2 to recognize whether you have the machine in relative positioning mode or absolute positioning mode. I would like G38.2 to only probe down by the thickness of the probe plus 2mm which should ensure it makes contact assuming everything is setup correctly.

                            G38.2 uses absolute coordinates as defined by the NIST GCode standard, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=823374. If you want to use relative coordinates in G38.2 then you can calculate the positions, something like this:

                            G38.2 Z{move.axes[2].userPosition-25}
                            

                            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

                            Yveskeundefined CthulhuLabsundefined 2 Replies Last reply Reply Quote 1
                            • Yveskeundefined
                              Yveske @dc42
                              last edited by

                              @dc42 & @cthulhulabs Tested old (just for fun) and new and of course the old was plain wrong and the new worked like a charm !

                              Thanks guys !

                              1 Reply Last reply Reply Quote 0
                              • CthulhuLabsundefined
                                CthulhuLabs @dc42
                                last edited by CthulhuLabs

                                @dc42 Thanks! I am really loving the flexibility that the object model and meta commands allow for.

                                @Yveske here is my final version:

                                var ProbeThickness = 13;
                                var ProbeXWidth = 58;
                                var ProbeYWidth = 58;
                                var CoordSystem	= 20;
                                
                                ; If the printer hasn't been homed, home it
                                if !move.axes[0].homed || !move.axes[1].homed || !move.axes[2].homed
                                	G28
                                
                                M291 P"Insert a Dowel Pin into your spindle and center it in the probes hole" R"Probing" S3 X1 Y1 Z1
                                
                                ; Find center of cavity
                                M675 X R2 F300 K0							; Find center in X axis
                                M675 Y R2 F300 K0							; Find center in Y axis
                                
                                G10 P1 L{var.CoordSystem} X0 Y0						; Store X and Y as zero in CoordSystem
                                 
                                ; Set bit above center of probe
                                G91									; relative positioning
                                G0 Z{var.ProbeThickness + 2}						; rapid move Z axis over the surface of the probe
                                G0 X{var.ProbeXWidth / 2} Y{var.ProbeYWidth / 2}			; rapid move X and Y axis to middle of probe
                                 
                                ; Probe Z component
                                G38.2 Z{move.axes[2].userPosition - (var.ProbeThickness + 2.25)}	; seek until the probe circuit is closed Z-axis 25 mm
                                G0 Z5									; rapid move Z axis 5 mm
                                
                                G10 P1 L{var.CoordSystem} Z{var.ProbeThickness + 5}			; store relative probe offset for coordinates system 1
                                G0 X{(var.ProbeXWidth / 2) * -1} Y{(var.ProbeYWidth / 2) * -1}		; go back over the hole
                                
                                G90									; Absolute positioning
                                
                                Yveskeundefined 1 Reply Last reply Reply Quote 1
                                • Yveskeundefined
                                  Yveske @CthulhuLabs
                                  last edited by

                                  @cthulhulabs Love your use of variables, didn't know they were operational already, will definitely start using them also ! Thanks and have a nice one !

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