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MMU2S keeps pushing filament into extruder  

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danwood82
(@danwood82)
New Member
MMU2S keeps pushing filament into extruder

Hi

For some reason my printer has started to push filament into the extruder without stopping and the print will not start, leaving a blob of PLA at the first point on the steel sheet. I've done full calibration, Cold pull, the PINDA and FINDA work and I've even replaced the nozzle.

Please help

Veröffentlicht : 12/05/2020 8:47 pm
cgrums
(@cgrums)
Active Member
RE: MMU2S keeps pushing filament into extruder

This usually happens to me when the IR sensor has not tripped from a steady 0 to 1.

Veröffentlicht : 12/05/2020 8:49 pm
kUMters
(@kumters)
Estimable Member
RE: MMU2S keeps pushing filament into extruder

MK3S + MMU2S (@BMG + MOSQUITO), MINI, ANET A8

Veröffentlicht : 13/05/2020 7:11 am
BanditBBS
(@banditbbs)
New Member
RE: MMU2S keeps pushing filament into extruder

Were you able to resolve your issue?  I've been having the exact same issue since upgrading to the latest firmware.  It is indeed my IR sensor not changing to 1 once the print starts, but before that it works as expected.  I can't figure out whats going on!

Check out some of my time lapse prints: https://www.youtube.com/user/BanditBBS

Veröffentlicht : 31/05/2020 2:35 pm
karl-herbert
(@karl-herbert)
Illustrious Member
RE: MMU2S keeps pushing filament into extruder

@bandit

On the MK3s/MMU2S both sensors communicate with each other. This is also necessary to determine the filament length from the MMU2S to the extruder. If one sensor is not working correctly or gives an incorrect feedback, such errors will occur. Adjust both sensors:

https://help.prusa3d.com/en/article/ir-filament-sensor-calibration-mmu2s_2245

https://help.prusa3d.com/en/article/finda-setup-and-troubleshooting_2250

Statt zu klagen, dass wir nicht alles haben, was wir wollen, sollten wir lieber dankbar sein, dass wir nicht alles bekommen, was wir verdienen.

Veröffentlicht : 31/05/2020 2:46 pm
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