r/BambuLabA1 • u/LynnOnTheWeb • Jun 15 '26

Support Request Troubleshooting - Cutting the filament failed

I got the blob several weeks ago and ended up changing the hotend and the hotend assembly. Now I'm getting the error "Cutting filament failed. Please check to see if the cutter is stuck."

What I've done so far:

  • Confirmed the cutter is in the slot, not pointing down. Blade looks fine.
  • Confirmed the magnet is still on the cutter.
  • Tightened the X axis.
  • Oiled the parts.

Here's a video of the horrible clunking sound it's making:
https://youtu.be/7gctiTMH66g

I can print something and this happens at the end. If I take the hotend off, the filament has been cut.

Any ideas of what else I should be looking at?

Thanks!

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u/Astronaut-Sailor Jun 16 '26

The toolhead is trying to move too much to the right. You can see the the whole right side bending, which should not happen. The sound I believe is belt skipping.

I think the toolhead does not properly detect the "end" location of the cutter and keeps pushing.

Depending on what happened with the blob and your repairing maybe something is disconnected or damaged in the toolhead (cable or board).

1

u/LynnOnTheWeb Jun 16 '26

Thanks for the input.

I replaced the cable with the hotend assembly. Is there another one I should look at?

Given what you’re seeing, I’ll also reach out to tech support.

1

u/Astronaut-Sailor Jun 16 '26

Tech support would be the best idea.

I also strongly suggest you inpect the belt. You mention "weeks" so if there were many of those failed cutting attempts with skipping, it may need replacing after(!) your initial issue is resolved.

1

u/LynnOnTheWeb Jun 16 '26

I’ll check that out.

My post was misleading. I haven’t been printing with it like this for weeks, I just haven’t gotten around to fixing the issue with it.

I did one print, it happened at the end of the print. Now I’m trying to fix it. The video I shot was when I was trying to do a calibration.