CNC Pause and Resume config files

Nightowl

@owend I need to call it a night. I've been summoned and the neighbours don't like the noise!

Here's the last bit of Console text...

27/05/2022, 21:28:41 	M0
Printing paused at X205.3 Y258.9 Z64.0
Cancelled printing file 0:/gcodes/Calibration Toolpath.gcode, print time was 0h 0m
27/05/2022, 21:28:30 	M25
Resume state saved
27/05/2022, 21:28:29 	Printing resumed
27/05/2022, 21:28:21 	M24
no tool was saved- selecting T0
Error: in file macro line 7 column 4: meta command: unknown value 'spindleSpeeds^'
27/05/2022, 21:28:17 	Printing paused at X205.3 Y212.6 Z65.0
27/05/2022, 21:28:07 	M25
Resume state saved
27/05/2022, 21:27:48 	M32 "0:/gcodes/Calibration Toolpath.gcode"
File 0:/gcodes/Calibration Toolpath.gcode selected for printing

Once again, the spindle didn't restart

OwenD

@nightowl999
OK.
As I said, I have no way of checking exactly how the restore points for spindles work.
Perhaps @DC42 could chime in at this point now that it's narrowed down and explain why there's no tool selected when you pause and also whether all the spindle speeds etc are saved in the object model.

Nightowl

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!

Nightowl

@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.

OwenD

@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

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

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...

OwenD

@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.

Nightowl

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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

Nightowl

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Nightowl

This post is deleted!