CNC Pause and Resume config files

OwenD

@nightowl999 said in CNC Pause and Resume config files:

Should the wriggly brackets be after the second "if"?

Yes, I thought I corrected that.

But now it's clear there's no tool selected when you are pausing.
Therefore none of the subsequent code can work as it relies on a tool being selected.
Is this a real job, or a dummy one?

I'm willing to bet this would work (if I haven't mage any syntax errors LOL)

; pause.g
if state.currentTool = -1
	echo "No tool selected - selecting tool zero"
	T0
G1 Z{max(move.axes[2].userPosition+5,move.axes[2].max-5)} ; move the Z axis to a safe height
if {state.currentTool >= 0} & {tools[state.currentTool].spindleRpm >= 0}
	set global.savedSpindleSpeed = tools[state.currentTool].spindleRpm ; save current spindle speed
	G1 X273.5 Y560 F2400 ; move XY to a safe place
	M5 ; turn the spindle off
	echo "Spindle speed saved at " ^ { global.savedSpindleSpeed } ^ "RPM"
else
	echo "condition not met - Tool is ", state.currentTool, " Spindle RPM is ", tools[state.currentTool].spindleRpm

EDIT
If this works then we need to know how many tools you have.

Nightowl

@owend I'll try it, but I'm aware you're tired (as am I!)

OwenD

@nightowl999 said in CNC Pause and Resume config files:

but I'm aware you're tired (as am I!)

It's 5:51 AM here. I'm tired because I woke at 3am and couldn't get back to sleep
Try it when you can and report back.

Nightowl

It works! And the spindle turns off with pause and on with resume!

Nightowl

@owend It's only 9pm here, but I've been trying to sort this all day!

OwenD

@nightowl999
OK,
So the problem was there was no tool selected.
I would have thought that was necessary to turn a spindle on, but maybe not.
If you have multiple tools then you'll need to consider how to store which tool was selected when you pause (if RRF doesn't store that in CNC mode)

Nightowl

@owend This is how my spindle is configured in config.g:

; Makita and relay configuration
M950 R0 C"out1+out7" L0:18000	; enable router relay on out7
M563 P0 S"Makita" R0 		; assign spindle 0 to tool 0 and name it Makita
T0				; select tool 0

This was only configured to turn the spindle off/on via a relay, but I figured I will need this resolved for when my speed-contollable milling motor turns up. My assumption is the speed thing isn't relevant as the DI isn't connected.

OwenD

@nightowl999
What happens in the console when you run
M98 P"0:/sys/config.g"

You're selecting T0, so I'm at a loss why it's not selected in your job.
Somewhere something is turning it off.

Nightowl

@owend said in CNC Pause and Resume config files:

M98 P"0:/sys/config.g"

From the command line?

OwenD

@nightowl999
yes

Nightowl

@owend
Only this:

27/05/2022, 21:02:24 M98 P"0:/sys/config.g"
HTTP is enabled on port 80
FTP is disabled
TELNET is disabled
Error: in file macro line 66 column 27: meta command: variable 'savedSpindleSpeed' already exists

but I haven't 'rebooted' the Duet

OwenD

@nightowl999
OK
That error is normal if you haven't rebooted.

I'm at a loss why you have no tool selected when pause.g begins unless RRF deselects it when G25 is run.

I've been looking through the object model a bit and I think you can do away with teh global variable and use values from the object model.
I'll post something to try in 5-10 minutes

Nightowl

@owend If you're sure. I don't want to stress you (or me!) out trying to resolve this. I thought this would be easy

I'm going back to the hous, but I'll update the files when you post the answer ( ) and I'll try it out toorrow morning (my time).

I'm really grateful for your time and help with this, @OwenD

OwenD

@nightowl999

Try these

; pause.g
G1 X273.5 Y560 F2400 ; move XY to a safe place
M5 ; turn the spindle off

and

;resume.g
if state.restorePoints[0].toolNumber =-1
	"echo no tool was saved- selecting T0"
	T0
else
	T{state.restorePoints[0].toolNumber} ; select the tool that was active
if state.restorePoints[0].spindleSpeeds[0] = 0
	echo "No resume speed was saved"
else
	M3 S{state.restorePoints[0].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[0].spindleSpeeds[0], "RPM" ; this should show that the setting was successful

Forgot to comment "resume.g" corrected.
Also I have no way of checking what's stored in the restore point arrays.

Nightowl

@owend I tweaked the first echo, too!

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