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BootStrap
(@bootstrap)
Active Member
Cancel Print with out Disassembling

It seems that every time I need to cancel a print, I have to disassemble the extruder connection and MMU to get the filament out. Is there a way to cancel a print and have the printer pull the filament back to the MMU start position?

Posted : 25/11/2018 2:28 pm
PJR
 PJR
(@pjr)
Antient Member Moderator
Re: Cancel Print with out Disassembling

2 ways:

1. use Octoprint with the relevant "Cancel" G-code
2. before cancelling, pull back the next filament to load, wait for the failed load and reset the printer.

Peter

Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…

Posted : 25/11/2018 8:31 pm
BootStrap
(@bootstrap)
Active Member
Topic starter answered:
Re: Cancel Print with out Disassembling

Thanks for the Reply.. Will give it a try.

It would be really nice if there was a CANCEL print option on the printer that would stop the print, retract filament, and stop.
Guess it does not exist.

Posted : 28/11/2018 7:52 pm
michael.c31
(@michael-c31)
Eminent Member
Re: Cancel Print with out Disassembling

Peter
do you have a link for option 1?

Posted : 29/11/2018 3:04 am
PJR
 PJR
(@pjr)
Antient Member Moderator
Re: Cancel Print with out Disassembling


do you have a link for option 1?

You could try setting this as Octoprint Cancel Print G-code:

G1 E-1 F7200
G91
G1 Z5 F1200
G90
M220 S100 ; Set override speed to 100%
G1 X0 Y200 F2400
G1 E5 F150
G1 E-15 F5600 ; Initial retract to get filament out without stringing
G1 E-10 F1000 ; retract filament in PTFE tube ( stages)
G1 E-10 F240
G1 E-10 F100
G1 E-10 F40
G1 E-10 F2000
G1 E-30 F2000 ; Remove filament to above drive pulley
M702 C ; Unload filament
G4 S1 ; pause 1 second
M107 ; turn off fan
M104 S0 ; turn off temperature
M140 S0 ; turn off heatbed
M84 ; disable motors

Peter

Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…

Posted : 29/11/2018 10:17 am
michael.c31
(@michael-c31)
Eminent Member
Re: Cancel Print with out Disassembling

Thank you!

Posted : 30/11/2018 8:52 pm
Peter L
(@peter-l)
Honorable Member
Re: Cancel Print with out Disassembling


Thanks for the Reply.. Will give it a try.

It would be really nice if there was a CANCEL print option on the printer that would stop the print, retract filament, and stop.
Guess it does not exist.

I can't speak to printing from Octoprint, but if you print from SD there is a menu option on the printer for "Cancel Print." Using this option will fully unload the filament.

If you have a failure where the print head cools before you can unload the filament, the current MK3 firmware has a menu option to unload filament. You need to preheat first, but it does work.

Posted : 01/12/2018 5:47 pm
Larry liked
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