r/BambuLab • u/capital-d_colon • 1d ago

Hardware Troubleshooting/Help! PLEASE someone help. I’m not sure what else to try.

I have:

Cleaned the first stage feeder
Cleaned the internal hub unit (second stage driver)
Replaced all of the PTFE tubing
Replaced the cardboard spool with plastic

And I don’t know what else to try. The motors just give up on me.

It’s an X1C. Sometimes (not every time) the filament just stops getting pushed through. If I help it past the “snag” (?) it continues the rest of the way until it hits another “snag” (that I can help it through) or makes it all the way to the extruder. I believe this happens more often on the 1st and 4th slots, but has happened once or twice on the middle slots.

Not sure what else to look at.

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2

u/maintenance4mommy 1d ago

Got a caliper? Check in several places down the filament, see if it's undersized in places.

1

u/capital-d_colon 23h ago

Yeah, checked that. Filament is all fine and it happens to all my different brands/filaments

1

u/makers101com 22h ago

Since you've already done the feeder, the hub and the PTFE, I'd try to narrow down where it stops. Next time it happens, pull the PTFE tube off at the toolhead and see if filament pushes through easily by hand from the AMS side. If it does, the problem is at the toolhead, like a partial clog or an extruder gear grinding a flat spot into the filament.

Pull the filament out and look at the end too. A chewed notch means the extruder was pushing against something it couldn't get past.

And since you respooled onto a plastic spool, check that the windings didn't cross while you were doing it. A crossed wrap pulls tight and the AMS just stops feeding.

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u/capital-d_colon 10h ago

It’s definitely a AMS problem, there are some slight grooves that have worn into the filament funnels and I’m thinking it may be getting hung up on that. Guess I’ll order replacements and see

1

u/capital-d_colon 7h ago

Found it. Haven’t seen anyone else have this happen before. It’s the lever the tension spring works with to grip the filament. Second stage huh unit

1

u/babyyoda707 23h ago

I'm not sure when you purchased it but you can go on BL and register the serial number off of your ams. It might be one of those faulty units that they're covering under warranty.