MMU2s still engaged in single color print mode
Hello,
I'm printing with single color on the MK3s/MMU2s and was surprised to see some interesting behavior.
During the print the MMU2s doesn't release the filament. It looks like the MMU2s extruder motor is deactivated so the MK3s extruder motor is pulling the filament. But it has much higher resistance because it also need to pull the MMU2s rollers and the MMU2s extruder motor.
I remember we had a slightly similar discussion already previously but don't remember the outcome. Does anybody has more insight knowledge why it still grabs the filament at the MMU2s? My expectation would be (and I remember it was previously the case) that revolver is releasing the filament once loaded.
Often linked posts:
Going small with MMU2
Real Multi Material
My prints on Instagram
RE: MMU2s still engaged in single color print mode
IR sensor or FINDA is probably intermittent . the reset button on the MMU ( next to the micro USB port) should reset it to pass-thru mode
RE: MMU2s still engaged in single color print mode
IR sensor or FINDA is probably intermittent . the reset button on the MMU ( next to the micro USB port) should reset it to pass-thru mode
Might be (in millisecond range, so it's not visible on the screen) but in this case it would have issues in loading/unloading process. But it looks like it's a correct behavior. It loads, disengages the MMU2s extruder motor, so it's not grinding or something and keeps printing with the roll/revolver still in the same position.
Often linked posts:
Going small with MMU2
Real Multi Material
My prints on Instagram
RE: MMU2s still engaged in single color print mode
I just had the same thing happen last week, i ended up flashing the mk3s firmware to an older version then going back. it's crazy isn't it?
I have a Prusa,therefore I research.
RE: MMU2s still engaged in single color print mode
I mean it's printing fine, so I don't see a reason to downgrade. But wandering if it's a bug or a new feature to detect filament is still moving. Or if it serves any other purpose.
Often linked posts:
Going small with MMU2
Real Multi Material
My prints on Instagram
RE: MMU2s still engaged in single color print mode
I think its possible the firmware isn't stable, mine was bad enough it was unusable. even in mmu mode.
I have a Prusa,therefore I research.
RE: MMU2s still engaged in single color print mode
Looks like we are not alone: https://github.com/prusa3d/Prusa-Firmware/issues/1946
Often linked posts:
Going small with MMU2
Real Multi Material
My prints on Instagram
RE: MMU2s still engaged in single color print mode
ouch, I know it was going on all filament paths for mine. troubleshooting it was the biggest part of figuring out what was going on.
I have a Prusa,therefore I research.
RE: MMU2s still engaged in single color print mode
Yup. I reported the same thing during a multi-color print.