Extruding Filament Failed - No Evident Issues

Bambu Lab X1 Series Troubleshooting
1

Out of the blue, my AMS will not load filament. This condition did not start after a change or anything like that - unless perhaps it was a firmware or software change, that I can’t remember.

The problem started midway through a print on a color swap, and aside from a rare troubleshooting win (I think 1 in 20 tries), no filament will load via the AMS.

Symptom: From any of the four spools my printer goes through the routine of feeding filament all the way to the extruder, tapping over and over, and failing. I receive the “Extruding filament failed. The extruder might be clogged. [0700 8007 163225]” message. I click retry. Same error. I then unload the filament to continue troubleshooting.

I think the most relevant piece of data in my troubleshooting is this: There is no problem printing from the external spool. I have done many successful prints from the Ext. Spool since this started. There is no blockage in the extruder or hot end.

Troubleshooting steps taken:

  • Replace the internal PTFE tube
  • Replace/swap the hotend/nozzle (tried three different ones actually)
  • Clean the extruder
  • Replace the filament sensor
  • Replace the filament buffer
  • Tried half a dozen different spools from the AMS
  • I even printed and installed one of the goofy PTFE alignment hacks from Printables

Where else could the problem come from? I see many other posts on this topic but none have satisfactory or relevant answers to my problem.

Thanks for reading.

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Having the same issue here, just looking for answers.

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Apologies for not following up with my own post. I was able to resolve this issue. The problem was with the AMS, apparently, but I can’t tell you exactly what the root cause was.

Here is what I did:

  • Disconnected the AMS from the X1C
  • Removed the interior base of the AMS from it’s housing (two screws, two small connectors, and the bowden tube).
  • It wasn’t very dusty but I blew it all out, and cleaned everything I could with isopropyl alcohol, using q-tips on the smaller parts and nooks/crannies. I paid particular attention to the spool rollers, they did have some gunk built up on them though they rolled just fine
  • Reassembled and reattached to X1C

Haven’t had a problem since.

4

Be sure if you’ve used your AMS/Printer a lot to check the condition of the PTFE tubes. If worn they will cause issues. These are consumable parts.

In some cases of this check the filament runnout sensor is plugged in correctly. Often on the P1x the plug will be bumped when removing the cover or somehow get loose. Unplug and seat it, being sure it’s plugged in correctly.

I’ve also had an issue once where this popped up because a little filament was stuck in the extruder and couldn’t feed to the nozzle. This issue was invisable because the filament would feed but I could hear the extruder skipping while it was trying to load.

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