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Filament jams on "outgoing passage"  

Active Member
Filament jams on "outgoing passage"
  While loading filament, the filament gets wedged against the “outgoing” passageway, just past the drive gears.  I’ve cut the filament to a point, as indicated in picture 9 of the handbook.  But, even with a point, the filament comes out of the “incoming” passageway, goes across the drive gear (which is perfectly aligned).  But, the filament usually curves a little bit and catches on the opening of the passageway.
  My workaround: If I open up the unit, I can nudge the filament into the passageway, while pushing from the buffer-end of the PTFE tube.
  I’m thinking I shouldn’t have to employ this workaround all the time.

Posted : 06/09/2020 4:20 pm
Active Member
RE: Filament jams on "outgoing passage"

First, I would clean the third Bondtech gear, which looks severely covered with a ground filament. Second, I would check that a top bearing pushes the filament to the gear. Finally, I'd use a twist drill on the incoming hole to ensure that it routes a filament to the Bondtech gear properly

Prusa Bear MK3S + MMU2S. Hotend: TriangleLab Dragon Hotend + Rubber Sock.
TheZeroBeast MMU2S firmware...
Posted : 08/09/2020 7:14 pm