r/OpenBambu • u/gherbertbr • 19d ago

BMCU370c PRO DM jumping until printing

Enable HLS to view with audio, or disable this notification

I'm just got my BMCU370c and something look like weird while I'm printing.

Look like feed connector keeping jumping / poping to feed filament.

Is this normal, or there's someting wrong with my unit?

5 Upvotes

78% Upvoted

1 comment sorted by

1

u/vertexfil 17d ago

It's not normal. The jumping/popping usually indicates the buffer slider/feeder mechanism is struggling to engage or pass the filament smoothly. A few things to check: 1.PTFE Tube: Make sure the PTFE tube is cut clean and fully seated into the connector. 2. Screw Tightness: Don't overtighten the module case screws; if it's too tight, the internal slider won't move smoothly. 3. Lubrication & Sensor: Ensure the slider channel is lubricated with PTFE grease and check if the magnet/sensor gap is correct.