Hi everyone, I’m having a strange extrusion problem with my Bambu Lab A1 and I can’t figure out what is causing it.
The problem is intermittent: sometimes the printer works perfectly, while other times it suddenly stops extruding during a print.
At first, I thought the issue was related to a specific black filament spool. However, I replaced it with a completely new spool and the problem happened again. For example, one print worked normally until around 43%, then it suddenly stopped extruding.
I’ve already tried several things:
Changed filament and spools
Cut off about 2 meters of filament and reloaded it
Tried different models and projects
Sometimes a model doesn’t extrude, then I change the model/filament, try again, and suddenly everything works
At Bambu Lab Support’s request, I printed a 3DBenchy, which completed successfully
I’ve already sent the printer logs to Bambu Lab Support
That’s the strange part: the printer can work perfectly and complete a Benchy without any issues, but then the extrusion problem randomly comes back on other prints.
At this point, I don’t know whether the problem could be a partially clogged nozzle, the extruder, the filament path, the AMS Lite, or possibly an electronic/sensor issue in the toolhead.
Has anyone experienced a similar intermittent extrusion issue with the A1?
What would you check or replace next?
Thanks a lot for any help or suggestions!

I am at a complete loss here. PLEASE help.

Full situation:

-At about 1 hour left of my 10 hour print the ams slot 1 light started flickering red. I got no error and everything worked fine so I left it running.

-99%, the print was done. I got the error stating that there might be filament stuck in the head and that it can't be extruded normally.

Thing is, it thought slot 1 was empty and tried to purge the rest of the filament.

I cut the filament and managed to extrude all of it out of the head after a while. (Removed the print in between)

I also pulled it out of the ams, since it wasn't registering it.

Now I wanted to insert it again, and it just wasn't reacting at all.

-tried a lot of things including but not limited to: cleaning AMS intake with compressed air, switching power on and off, cutting filament at different angles and finally, trying another slot. All other slots work fine and the filament is also not the problem (started with black filament, switched it to slot 1, moved white filament from slot 4 to 1 to test if it was the filament, it wasn't)

All filament is from Bambulab.

(The little gear at slot 1 is infact spinning)

I have NO idea what is going on with my slot one. Please help me.

I keep getting these artifacts in the first layer, did automatic and manual flow calibration several times, cleaned my buildplate with degreaser, dishsoap, windex and IPA, still getting them every time. Reduced first layer infill speed from standard value to 50mm/s, still... With Archimedes spiral it mostly happens in the corners, with the standard diagonal pattern it's a bit worse (last pic)
Bambu PLA basic, dried for 12h.

Are there some screws loose, or could it the belt tension?

supposed to be 4 in the picture, barely made it past the 2nd. I already checked for nozzle clog and did a cold pull, not sure what else to do

a1 mini printer

Bambu A1
Pla Plus/Pro
Changed Settings:
Ironing ON || Rectilinear || 30mm/s || 10% flow || 0.15 spacing || 0.21 inset (Default)
Adaptive Cubic %10
Z-hop: Spiral
Filament Flow Ratio: 0.95

It was only audible on the ironing action now it is silent again.

Is it normal? I don't remember hearing a clicking sound before on ironing.

Bambu A1

Bambu Slicer Settings:

• %20 infill, Cross Hatch
• 2 wall loops
• Strong tree support
• Alternate Extra wall
• Printed in PLA pro/plus (Last pictures are the filament settings nothing changed except I run flow calibiration on this filament recently)

Issues and Clarifications:

• I took the print apart but (like the second picture) it had already a clear cut line on the print before i took the print from print bed.
• as long as i am aware, there is no bed adhesion isssues.
• I saw a lot of "infill type" problems on other people. I was just wondering if cross hatch has the same problem or not?

EDIT: I have printed another print with 0.95 filament flow and adaptive cubic with 6 layer wall. It still has the same 1 layer skipped line where it gets cut

I have 900hrs on the A1 and I have done all the oiling and greasing in the way of maintenance what else do I need to do to fix this sound at 17sec mark and also near the end

This little bit of plastic fell out all broken from the hotend as I was undoing the main front screws. Anyone know what it is?

I only wanted to tighten the hotend back screws, not find new issues 😅

I recently started using the .2mm nozzle and right from the first layers it’s not laying out properly. As you can see from the image even the lines aren’t being drawn properly. Has anyone else faced this issue?

Just came back from a 1 Week vacation and now my A1s Light started blinking in this Pattern. 4 short, one long, pause, four short, one long, pause, 4 short, pause, five short, pause, repeat. No error messages or anything. What happened? What could be the reason?

SOLVED! One Power Cycle and it was back to normal. u/Whatupchuck789 recommended an update which I'm doing right now. I'll only update when it reoccures. Thank you for your help!

Been trying to load since this morning but it won’t extrude any filament. I checked and fixed the filament clog and did everything I was told by Gemini/Claude but it still wouldn’t work. I don’t have an extra nozzle so I ordered one today.

Any other recommendations?

Hey everyone, I have been dealing with this issue on my bambu A1 for the last 2 days. Would greatly appreciate if someone can help please.

So far I have tried:

- Nozzle swaps (0.4 hardened steel, new 0.4 stainless steel)

- DIfferent plates (Pei plate, cool plate, textured plate)

- Bed tramming

- Full maintenance callibration

- Flow ratios (1.02, 0.98, 0.95)

- Adjusting 4 small screws behind the nozzle

Thanks in advance!

https://makerworld.com/models/2544456

Hey everyone, while printing a model, suddenly the filament started getting stuck. I opened the tube and cleared the filament and resumed the print but again same issue occurred. Meanwhile i noticed that once the print starts, the nozzle temperature is not retaining at 220 and start to cool down mid print which explains why filament is getting stuck.

Any ideas or suggestions what might be causing it?

Edit : i did put the silicon sock and cover back but it didn't help. Sorry for missing this detail before.

Why am I getting this ???
BambuLab original plate !!!

Iv been getting into warhammer and decided to print stuff since it is infinitely cheaper than buying it at shops, I attempted to print a few kreigsmen but it came out all weird like this,I’ve also had a lot of issues with other prints where the supports are nocked over and the only thing I can assume did it is the printer head