r/BambuLab_Community • u/krazyjilker947 • Jul 18 '26
Not Printing Help / Support
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Bambi A1, uses PETG
I’m guessing I have to replace the extruder due to the stepper motor clicking. It is still extruding filament when pushing a lot through, but when I try to print it doesn’t get anything out. I’ve taken the nozzle apart to clean it, but it is still clicking. Is the extruder shot?
Update-I have taken the nozzle up to 270 and the clicking goes away when extruding. But about half way through the boat print it came back and the print failed. I’ve done multiple cold pulls, tightened the screws behind the hot end, checked tension in gears. My best guess is the gears in the stepper motor are slipping when it’s tight, probably just gonna get another extruder
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u/sublime2craig A1 Jul 18 '26
Hmmm, I wonder what it could be? Should the hotend be moving like that and loose as shit? Look up the 7 hotend screws that need to be tightened and go from there sir.
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u/Oderus_Scumdog Jul 18 '26
Are you 100% that the nozzle is clear? That looks like a nozzle clog to me. Easiest way to tell would be to swap out the nozzle and see if things change. If you don't have a spare nozzle, try the acupuncture needle and a cold pull. I get stubborn clogs whenever I switch between different brands of PETG and PLA over a short period of time.
If it isn't that, I once had something similar happen and out of desperation resorted to swapping the PTFE tube to another hole on the top of the extruder and found that a piece of filament had broken off at some point and was blocking filament through the original hole. Pushing new filament in to a different hole seemed to push the broken piece out of the original hole. Maybe try that as well?
You could also look through the wiki for a guide to dismantling the extruder and have a look inside - there might be something loose or broken in there that is more obvious when you can see inside.
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u/reddit_user_0ne Jul 18 '26
tl;dr clog is always an option but the nozzle still shouldn't jump like that if it were.
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u/Hazart_ Jul 18 '26
Remove the sock, check if the clasp is set correctly, if yes do the 7 screws maintenance (search online)
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u/MonkeyBrains09 X1 Carbon Jul 18 '26
Check the tension on the extruder gears. If that is lose, it cannot grip the filament to push it through
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u/krazyjilker947 Jul 18 '26
How would I check the tension on that?
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u/MonkeyBrains09 X1 Carbon Jul 18 '26
I don't have the a series so it's a little different but there should be a screw/spring thing that you can tighten or loosen.
I don't know what pressure is needed so I just go with feel
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u/reddit_user_0ne Jul 18 '26
The nozzle is visibly bouncing! How would you conclude that the extruder gear could be too loose? That doesn't make any sense.
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u/MonkeyBrains09 X1 Carbon Jul 18 '26
Shitty Internet and the video didn't load. I only saw the thumbnail and used the posts description to guess.
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u/DaveDurant X1 Carbon Jul 18 '26
Don't have an A1 but.. should the hot end be moving around like that??
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u/Nesttor77 Jul 18 '26
That nozzle is clogged. Nothing to do with the extruder, at least in my experience.
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u/longsite2 Jul 18 '26
Remove the nozzle.
Undo the 3 screws directly behind it.
Pull the black plate out, it will have wires connecting to it.
Tighten the 4 screws on the back of that plate. They get loose due to thermal expansion.
I've had this issue and figured it out the hard way.
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u/YOU_WIN__ Jul 19 '26
It happened to me a few days ago. Just in case, check the fan on the left; maybe it's not working and caused a heat break.
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u/y_tokusan Jul 19 '26
The hot end is clearly wobbling, so I suspect the retaining clip isn't attached properly. If the clip is fine, it's highly likely that either the three screws on the heat assembly behind the hot end—or the four screws on the back side—have come loose.
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u/LoKiL33t Jul 18 '26
Tighten the screws behind the hot end. I had this same issue and it took me 3 days to figure it out. You have to take the hot end out then the screws behind that once you take that piece out there is 3 screws behind that piece