Hello, community members I would like to share a recent experience that I had where filament (black XYZ) broke in multiple places and was stuck in multiple places. Here is a soultion and a fix. Do not try to remove the PTFE tube from the coupler the tension of the stuck filament will cause the PTFE tube to become stuck.
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Remove the outside PTFE tube first. Follow Bambu Labs guide on removing the filament buffer. Disconnect the cord and remove it entirly. Take the filament buffer piece and set it down.
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Now again do not try to remove the PTFE tube, it is stuck by tension. Find out which buffer is stuck and continuly keep pushing in a fast and rapid motion the orange buffer. After about 5 to 10 minutes of working it will become lose.
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Take a new peice of filament and push it through the buffer the filament should come back through the other side.
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Put the filament buffer back in, confirming it is not stuck. Load a new piece of filament and confirm it is extruding correctly.
This should solve any issue when filament is stuck inside the filament buffer. I replaced it fully and its working like its brand new. Please like and upvote this so this is one of the first soultions when people who have this problem are searching for a soultion.
This problem occured within 100 hours of printing. It seems as though it was brittle filament so no apparent printer issues. I have been printing fine ever since. If you have any questions please reach out.
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+1 for the jiggle method. I had a section of filament stuck in the buffer and couldn’t jam it out by stuffing filament through either side – but after jiggling the spring loaded buffer back and forth for a minute I was able to dislodge it without disassembling the buffer.
Thanks!
Alan
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Here’s what I did and worked like a charm: I could see my filament broken and stuck near the buffer.
I removed the PTFE tube from the print head and loaded a new filament roll. The broken piece popped out of the PTFE tube and it was all clear.
Replace the PTFE tube into the print head and you are all good to go !
I was having intermittent issues with the left feed. I narrowed it down to the buffer. In searching on how to disassemble it to found this thread and the jiggle method saved me too. I took the PTFE tube out of the buffer and jiggled it back and forth a few times and a 1cm piece of filament popped out.
I have this issue, but the orange part I need to jiggle is, in fact, stuck. I can’t seem to find anywhere there are directions to get it to move back and forth again.
I had the same problem, again the left side. Took it all apart and filament came out so put it back together and AGAIN had the problem. So this time I remove the tubes from both ends, I used an air blower for inflating toys, and I blew it from the inside to outside, and that worked. I also noted that without PTFE tube inserted on the inside, the filament will usually get stuck in the buffer. Canned air spray should work also.
For some unknown reason, its almost ALWAYS White PLA filament that gets brittle. Not usually Bambu brand but many others.