Stop part cooling fans on pause and restore on resume

Serbitar

@phaedrux
Slicer is doing M106 S255.

With M106 S0 P2:4 in pause.g the fans don't stop.
I'm doing that before deselecting the tool though so won't they be controlled by the virtual tool fan at that point?

Phaedrux

Thanks for testing but I think I misguided you as I don't think M106 will accept two fan targets.

M106 S0 P2:4

But it should be storing and restoring your fan values, but it's not, so possibly a bug. Will see what DC42 says.

Phaedrux

Likely bug. On the list to investigate.

Serbitar

Yep looks bugged to me too.

pause.g

T-1     ; Deselect tool
M106 S0 P2
M106 S0 P4

correctly stops the fans and

resume.g

T R1     ; Reselect last tool
M106 R2  ; Turn on part cooling
M703     ; Load tool paramaters
M116     ; Wait for temps

resumes the fans but stops them once temps are reached and print resumes

dc42

@serbitar please try M106 R1 not M106 R2. Also you should use a plain M106 S0 command to turn the fans off in pause.g. But think that's what you were doing originally.

Does it make any difference if you remove the M703 command?

Serbitar

@dc42 Ah, that is an artifcact from playing with this last week, well spotted.

Changed config as you suggested, and thing still aren't working as desired.

Fans stop on pause but are not restored.

Is there some way to peek into the stored state?

pause.g

G91 ; relative positioning 
G1 Z50
G90 ; Absolute positioning

G53 G1 x0 y-999 F60000; Send carriage to rear centre

M106 S0 ; Turn off part cooling 
T-1     ; Deselect tool
;M106 S0 P2
;M106 S0 P4

resume.g

T R1     ; Reselect last tool
M106 R1  ; Turn on part cooling
;M703     ; Load tool paramaters
M116     ; Wait for temps

M83                  ; relative extruder moves
G1 E10 F3600         ; extrude 10mm of filament

;; Move back into pos
G1 R1 X0 Y0 Z5 F6000 ; go to 5mm above position of the last print move

dc42

@serbitar I confirm that this is a problem. There is a single set of saved fan speeds used by both pause/resume and tool changes. What's happening is that when you reselect the tool in resume.g, the current fan speed is zero, and that's overwriting the value saved when the pause occurred.

Serbitar

@dc42 Thanks for looking into it, that makes sense.
I will change my pause.g to use G10 to turn the hotend heater off instead (for now).

dc42

@serbitar I have implemented a fix in RRF 3.3RC2. I have also added a new parameter to M568 that allows you to switch a tool's heaters between off, standby, and active.

Serbitar

@dc42 Wow fantastic! I looks forward to experimenting with it once released!