At the end of prints I get "Unloading Filament" "Ramming" and stuck at 50%.
Every 2 or 3 prints when using the MMU3, It gets stuck like this indefinitely. The filament seems to be retracted just fine, if I reset the machine it prints again just fine as well. Not a huge issue, but still an inconvenience. Any ideas? I imagine maybe a sensor isn't calibrated quite right?
RE: At the end of prints I get "Unloading Filament" "Ramming" and stuck at 50%.
This exact thing keeps happening to me too.
Any updates?
RE: At the end of prints I get "Unloading Filament" "Ramming" and stuck at 50%.
What version of firmware are you using? 6.4.0 has been known to cause errors like this. I reverted to version 6.2.6, and those errors went away.
2022 - Creality Ender 3 V2
2024 - Prusa MK4S/MMU3
2026 - Bambu P2S/AMS2Pro
2028 - Liquid CMY for billions of colors?
RE:
The older image above shows a typical FINDA adjustment error. Look closely at the sensor states on the bottom row. Do you see that even though the filament is pulled all the way past the MMU feed roller, FINDA reports ON as if filament is present in the bowden! Instead of uploading the firmware, carefully recheck and calibrate FINDA!
RE: At the end of prints I get "Unloading Filament" "Ramming" and stuck at 50%.
Calibration, yes, or foreign material. Try to push filament through the MMU slider from the printhead side. If it's difficult, you may be on to something ... and if "something" comes out that wasn't supposed to be there - bingo.
The sloppy status message (showing "ramming" which relates to the tip-forming process when the problem actually occurs while "unloading" the filament) doesn't exactly help...
RE: At the end of prints I get "Unloading Filament" "Ramming" and stuck at 50%.
I had the same problem, Reverting to 6.2.6 solved the issue. I look forward to it being resolved in the next firmware release.