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    CNC Pause and Resume config files

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    • Nightowlundefined
      Nightowl @OwenD
      last edited by

      Thank you, @OwenD. you've been an absolute diamond.

      I'll restore the files back to where they were before I said "It works!..." and hope @dc42 would be kind enough to help.

      Thanks again!

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      • Nightowlundefined
        Nightowl @OwenD
        last edited by

        @owend said in CNC Pause and Resume config files:

        As I said, I have no way of checking exactly how the restore points for spindles work.

        I think the issue was only really with saving and restoring the spindle speed of a digitally controlled milling motor.

        If I need to pause the CNC, the only real difference between that and a 3D printer is it would be safer to turn the spindle off, and back on at the same speed on resume. Lifting the Z and moving the XY to a predetermined location is my variation on what seems to be the default for a 3D printer, i.e. X0, Y0 and Z0 (but I'm happy to be corrected.

        The default pause.g and resume.g files work as they should, even with my 'safe location' amendments, it's just saving and restoring the spindle speed.

        @dc42 first helped me with this by showing how to declare a global variable (savedSpindleSpeed) in the config.g file, then setting the variable's value to the actual spindle speed when pause.g is initiated.

        It sounded simple, but for some reason - as you've identified @OwenD - something is 'deselecting' the tool or the value of the variable isn't being saved.

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        • OwenDundefined
          OwenD
          last edited by

          @nightowl999
          I've just found that the restore points are saved to slot 1 in a pause.
          So if my last macro was to work it would have to be

          ;resume.g
          if state.restorePoints[1].toolNumber =-1
          	"echo no tool was saved- selecting T0"
          	T0
          else
          	T{state.restorePoints[1].toolNumber} ; select the tool that was active
          if state.restorePoints[1].spindleSpeeds[0] = 0
          	echo "No resume speed was saved"
          else
          	M3 S{state.restorePoints[1].spindleSpeeds[0]}	; resume saved spindle speed
          	G4 S1					; wait 1 second to allow the spindle to spin up
          	echo "Spindle speed resumed at ", state.restorePoints[1].spindleSpeeds[0], "RPM" ; this should show that the setting was successful
          
          
          Nightowlundefined 1 Reply Last reply Reply Quote 0
          • Nightowlundefined
            Nightowl @OwenD
            last edited by Nightowl

            Thank you so much, @OwenD!

            I'll update the pause.g and resume.g files, but am I correct in thinking all the save/resume 'stuff' is being carried out in the resume.g file now, rather than the pause.g file?

            From what I've gleaned, these are the files I'm going to try out:

            ; pause.g
            G1 Z{max(move.axes[2].userPosition+5,move.axes[2].max-5)} F240 ; move the Z axis slowly to a safe height
            G0 X273.5 Y560 ; move XY to a safe place
            M5; turn the spindle off
            
            ;resume.g
            if state.restorePoints[1].toolNumber =-1
            	echo "No tool was saved - selecting T0"
            	T0
            else
            	T{state.restorePoints[1].toolNumber} ; select the tool that was active
            if state.restorePoints[1].spindleSpeeds[0] = 0
            	echo "No resume speed was saved"
            else
            	M3 S{state.restorePoints[1].spindleSpeeds[0]} ; resume saved spindle speed
            	G4 S1 ; wait 1 second to allow the spindle to spin up
            	echo "Spindle speed resumed at ", state.restorePoints[1].spindleSpeeds[0], "RPM" ; this should show that the setting was successful
            G1 R1 X0 Y0 F2400 ; move XY back to last saved location 
            G1 R1 Z0 F240 ; move Z slowly to last saved location
            

            Also, it seems I no longer need the variable to be defined in the config.g file?

            Thank you

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            • Nightowlundefined
              Nightowl
              last edited by Nightowl

              I'm wondering if the issue is with the state of the spindle is being saved after it's been turned off with the M5 line in the pause.g file, or does the very act of initiating pause.g save the state of the machine somewhere?

              I'll have a look at transposing the files and see how I get on...

              OwenDundefined 1 Reply Last reply Reply Quote 0
              • OwenDundefined
                OwenD @Nightowl
                last edited by

                @nightowl999
                When you pause the job RRF saves certain values automatically.
                From what I can glean from the docs that should include the spindle state, direction and speed.
                If you hit pause and then use the object model browser you should be able to confirm.
                I can't as I don't have a spindle configured.

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                • Nightowlundefined
                  Nightowl @OwenD
                  last edited by

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                  • Nightowlundefined
                    Nightowl
                    last edited by Nightowl

                    Well, I think I've got it, but there may be a tweak I could use to improve it, but as I've only got one spindle/tool this will probably do. This pause.g file works and saves the spindle speed to the defined variable:

                    set global.savedSpindleSpeed = spindles[0].active
                    echo "Spindle speed saved at " ^ {global.savedSpindleSpeed} ^ "RPM"
                    G1 Z{max(move.axes[2].userPosition+5,move.axes[2].max-5)} F2400 ; move the Z axis to a safe height		
                    G0 X273.5 Y560 ; move XY to a safe place
                    M5 ; turn the spindle off
                    

                    ...and the resume.g file turns the spindle back on, although I think there are a few spurious lines in it now. I'll deal with that in the morning!

                    Thanks @OwenD and @dc42 for your help with this 👍 👍

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                    • Nightowlundefined
                      Nightowl
                      last edited by

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                      • Nightowlundefined
                        Nightowl
                        last edited by

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