MMU not feeding filament
I am constantly having issues with filament not feeding from MMU unit. Is there a trick i am missing? Is there an adjustment i can make?
Thank you for your assistance.
RE:
You should tell a bit more what you're doing.
Making a blind bet, this is where I'd put my money:
If something goes wrong, the MMU pulley carves a halfmoon-shaped gap into the filament.
You clean up, start anew - and the problem carries over to the next print even though you thought you had everything sorted out. Eventually, the carved-out part ends in the extruder, which fails to grip it, or the MMU fails to load it.
So take the time to check the filament, the last 40 cm, slide it between your fingers. Yes, it's annoying to re-load but actually, the more I use it, I don't even think loading filament is as bad as people make it.
Depending how you set your idler tension, it is also possible that filament gets worn out after too many load-/unload cycles with too little forwards travel (I see this a lot with the 0.25 mm nozzle - not officially supported - where the used amount of filament is minimal so it's just rolling back and forth and getting squashed)
If that's not it, check the FINDA for debris (push filament through in reverse direction - if you can't, it's a telltale sign something is off)