Filament runout script doesn't work

[Acid]

Hi,

I've made my own filament sensor using an optical sensor and a proxy that blocks this sensor whenever the filament is loaded. I've declared its pins in the config.g and tested it and can confirm this part is working.

However, when I cut the filament manually to test my script, the machine moves to the designated location G1 X1 Y75 F3000 but it doesn't stop the print. Instead it goes back to where it was printing and continues to print.

It then shows a popup on my LCD screen from the first M291 and when I press 'ok' the extruder starts to unwind filament WHILE the machine just keeps on printing as if nothing happened.

I'm running on 3.4.4 so pause isn't automatically triggered.

I specifically don't want to run pause.g because that has commands in it that conflict with my filament-error.g

I looked at other examples by other users and examples found on the forum and decided to make my own script as I didn't want to make it as complicated as some of the examples and I wanted to keep it within my understanding so that if an issue came up I could solve it myself.

It seems I may have forgotten to use M25 to pause and M24 to resume, but I haven't found this in scripts by others, so I'm wondering what may be my problem.

This is the source of filament-error.g

; Step 1 > Pause > move to a spot center-front for easy access
G60 S0          ; Save position to slot 0
G1 E-10 F3600   ; retract 10mm of filament
M568 A1         ; set tool to standby temp
G91             ; relative positioning
G1 Z5 F360      ; lift Z by 5mm
G90             ; absolute positioning
G1 X1 Y75 F3000	; Move out of the way
 
; Step 2 > Ask user to intervene
M291 P"Filament runout detected, proceed?" R"Filament out" S2
 
; Step 3 > After checking you click okay and it starts reversing filament
M302 P1         ; Allow cold extrusion
G1 E-520 F3000  ; Unwind the filament 400mm
 
; Step 4 > Notify user and offer option to place new filament
M291 P"Remove remaining filament, insert new filament and continue" R"Insert new filament" S2
G1 E480 F2000   ; Load filament 480mm fast
G1 E20 F750     ; Load the last bit a little slower
 
; Step 5 > heatup hotend back to extruding temperatures and extrude a little extra to prime the nozzle
M568 A2         ; Set active temperature of the active tool
M116            ; wait until hotend reaches set temperature
M302 P0         ; Disable cold extrusion
G1 E20 F60      ; Prime the nozzle a little bit
M291 P"Remove the extruded string and click to continue" R"Printer ready" S2
 
; Step 6 > Resume the print
G1 R1 X0 Y0 Z5 F36000   ; go to 5mm above position of the last print move
G1 R1 X0 Y0 Z0          ; go back to the last print move

Maybe the issue is clear to the advanced user, maybe there are more issues in my script. I'm pretty new to RRF, have my machine up and running for a while now without issues, but writing files like these are still a bit difficult for me.

Thanks for your time.

[dc42]

@Acid you need to pause, but you don't want to run pause.g. I have it in mind to add an option to M25 to do that, but it isn't implemented yet. So for now I suggest you use a global variable to indicate to pause.g whether it should run or not, like this:

• In config.g add global inFilamentError=false
• Add if !global.inFilamentError at the start of pause.g, then indent the remaining commands so as to be inside that condition
• At the start of filament-error.g add this:

set global.inFilamentError=true
M25 ; pause print
set global.inFilamentError=false
 

• At the end of filament-error.g add M24 ; resume print. This will resume the print, running resume.g first. If there are any commands in resume.g that you don't want to run, you can use the same global variable again to make them conditional.

[Acid]

@dc42

Thanks a lot for the suggestions, I have added this, and I also added some more variables to make sure a the filament runout script cannot be run when the print hasn't started yet because I had the issue that it would start to retract when I restarted the printer without any filament present.

So my filament-error.g looks like this now:

; first check that we are not currently in an error state and the switch has been toggled again.
if (global.filamentDistance !=0) || (state.status != "processing")
	echo "Filament sensor triggered, but no print in progress.  No action taken"
	M99 ; exit macro
 
set global.inFilamentError=true
M25 ; pause print
set global.inFilamentError=false
 
; Step 1 > Pause > move to a spot center-front for easy access
G60 S0          ; Save position to slot 0
G1 E-10 F3600   ; retract 10mm of filament
M568 A1         ; set tool to standby temp
G91             ; relative positioning
G1 Z5 F360      ; lift Z by 5mm
G90             ; absolute positioning
G1 X1 Y75 F3000	; Move out of the way
 
; Step 2 > Ask user to intervene
M291 P"Filament runout detected, proceed?" R"Filament out" S2
 
; Step 3 > After checking you click okay and it starts reversing filament
M302 P1         ; Allow cold extrusion
G1 E-520 F3000  ; Unwind the filament 400mm
 
; Step 4 > Notify user and offer option to place new filament
M291 P"Remove remaining filament, insert new filament and continue" R"Insert new filament" S2
G1 E480 F2000   ; Load filament 480mm fast
G1 E20 F750     ; Load the last bit a little slower
 
; Step 5 > heatup hotend back to extruding temperatures and extrude a little extra to prime the nozzle
M568 A2         ; Set active temperature of the active tool
M116            ; wait until hotend reaches set temperature
M302 P0         ; Disable cold extrusion
G1 E20 F60      ; Prime the nozzle a little bit
M291 P"Remove the extruded string and click to continue" R"Printer ready" S2
 
; Step 6 > Resume the print
G1 R1 X0 Y0 Z5 F36000   ; go to 5mm above position of the last print move
G1 R1 X0 Y0 Z0          ; go back to the last print move
M24 ; resume print

Going to give this a try!

[holmbot]

@Acid I used this as the basis to get my first filament-error.g action running. Thanks!

I'm confused by the slot numbers of saved position vs. the resume position. We save in slot 0 using G60 S0 and resume using slot 1 with G1 R1. Is there a difference in 0/1 based slot counting? Typo, but works for other reasons? Not complaining since it works, but want to learn.

; Step 1 > Pause > move to a spot center-front for easy access
G60 S0          ; Save position to slot 0
...
; Step 6 > Resume the print
G1 R1 X0 Y0 Z5 F36000   ; go to 5mm above position of the last print move
G1 R1 X0 Y0 Z0          ; go back to the last print move
M24 ; resume print