April 4, 2025: I’ve updated the description of my issue to reflect my latest troubleshooting attempts:
Bambu Lab X1 Carbon AMS Connection Issue
IMPORTANT NOTE:
The issue is not with my AMS unit. I have 2 AMS units, and both of them work perfectly fine with my P1S. The issue is either with my X1C or somewhere between the AMS units and the extruder unit of my X1C.
The Issue:
Without the AMS, filament loads fine. With the AMS, filament pushes all the way to the extruder, pauses briefly, then retracts all the way back. The AMS retries multiple times before showing error: “Extruding filament failed. The extruder might be clogged. [07008007 131602]” [The extruder is ABSOLUTELY NOT clogged, as immediately before and after testing with the AMS, I can feed through the standalone PTFE and the extruder catches and extrudes the filament with zero issue. Since having this problem with AMS filament feeding, I have done multiple prints with my X1C through the rear PTFE port.]
What I Have Tried:
-
Bypassing AMS: Loading filament directly into the printer (bypassing the AMS) works perfectly. The filament loads into the nozzle, and printing starts as normal.
-
Replacing Filament Buffer: I installed a brand-new filament buffer (model SA003) from Bambu Lab, but this did not resolve the issue.
-
Replacing AMS Connector Board: I installed a brand-new AMS connector/interface board from Bambu Lab, but this did not resolve the issue.
-
Testing AMS Cable Ports: I tested both cable ports on the AMS by connecting the filament buffer to each one individually. Neither resolved the issue.
-
Testing Different Cables: I replaced both cables connecting the AMS to the buffer and the buffer to the X1 Carbon with known working cables. This made no difference.
-
Testing Multiple AMS Slots: Initially, I tested with slot A1, which exhibited the issue. Switching to slot A4 led to a single random successful load. After A4 worked, A1 also worked a single time. However, it has failed each and every time since with all AMS slots.
-
Separate AMS: As mentioned above, I also have a P1S with its own AMS. I know for a fact it works. I tried using this AMS, but the problem persists. Again, both of these AMS units work fine with the P1S.
-
Replaced Extruder Unit: I replaced the extruder unit with a brand-new one from Bambu Lab, but this did not fix the problem.
-
Replacing all PTFE Tubes: I replaced each and every PTFE tube, the ones on the back, the ones coming from the AMS, and the one running from the top of the extruder through the back of the machine. No luck.
-
Adjusted PTFE Tension: I made sure there was minimal tension in the PTFE tubes, especially in the PTFE tube running from the extruder top to the back of the machine. The arch of the tube looks perfectly fine with plenty of arch for smooth filament travel.
-
Firmware Updates: The printer is running on up-to-date firmware.
Considering that I already replaced the AMS control board, the filament buffer, and the entire extruder unit, is there even anything else I can replace which would make a difference?
1 Like
I would honestly just open a claim with Bambu and see if they’ll send you a new one.
Hi, the same thing happened periodically on my printer.
What I did:
Raised the glass by 5 cm. There are different models of AMS Riser + LED backlight.
By lifting the glass, I got a larger bending radius of the Teflon tube.
The total length of the Teflon tube for the printer is 54 cm. The inside of the printer is about 45 cm. If the tube is too short, there will be a large slope (smaller radius) and the filament will periodically rest against the edge of the filament sensor.
The most important thing is to achieve the least resistance when pushing the filament from the AMS to the extruder.
There are a total of 4 bends on the filament path from the AMS to the extruder, so you need to optimize all these bends for easy passage of the filament. You need to listen to the sound of the AMS motor as it pushes through the filament. Then it will become clear at which bend the power loss occurs. There are also Teflon tubes that have greater resistance when pushing through the filament. I came across one included with the HUB for 4 AMS.
All of this applies to a good printer.
You also need to replace 4 tubes in the interior of the AMS. They also add problems to the piggy bank.
You said you had a P1S with AMS. Does this mean you have two AMS units? I would swap them and see if the problem follows the AMS or stays with the printer.
Yes I’ve already attempted this but with no luck.
I had this problem and I could not for the life of me figure out where the blockage was. I took everything apart and manually pushed filament through the entire path. Printing from the spool worked fine. Then I watched it try to load from the AMS again and I noticed the problem. When I plugged the PTFE tube from a previous issue, I didn’t route it behind the control cable, so it was a bit “bent”. See this picture: Before it complained, I pushed it with my hand towards the printer and it grudgingly completed the path to the extruder. After this print I’ll fix it permanently.
[Edit: I had to actually switch the tube and do one more print from the spool just to clear everything up, then it worked fine.]
The issue still persists. I’m updating my full description of the issue for clarity. Any insight much appreciated, this is driving me crazy
Bambu Lab X1 Carbon AMS Connection Issue
IMPORTANT NOTE:
The issue is not with my AMS unit. I have 2 AMS units, and both of them work perfectly fine with my P1S. The issue is either with my X1C or somewhere between the AMS units and the extruder unit of my X1C.
The Issue:
Without the AMS, filament loads fine. With the AMS, filament pushes all the way to the extruder, pauses briefly, then retracts all the way back. The AMS retries multiple times before showing error: “Extruding filament failed. The extruder might be clogged. [07008007 131602]” [The extruder is ABSOLUTELY NOT clogged, as immediately before and after testing with the AMS, I can feed through the standalone PTFE and the extruder catches and extrudes the filament with zero issue. Since having this problem with AMS filament feeding, I have done multiple prints with my X1C through the rear PTFE port.]
What I Have Tried:
-
Bypassing AMS: Loading filament directly into the printer (bypassing the AMS) works perfectly. The filament loads into the nozzle, and printing starts as normal.
-
Replacing Filament Buffer: I installed a brand-new filament buffer (model SA003) from Bambu Lab, but this did not resolve the issue.
-
Replacing AMS Connector Board: I installed a brand-new AMS connector/interface board from Bambu Lab, but this did not resolve the issue.
-
Testing AMS Cable Ports: I tested both cable ports on the AMS by connecting the filament buffer to each one individually. Neither resolved the issue.
-
Testing Different Cables: I replaced both cables connecting the AMS to the buffer and the buffer to the X1 Carbon with known working cables. This made no difference.
-
Testing Multiple AMS Slots: Initially, I tested with slot A1, which exhibited the issue. Switching to slot A4 led to a single random successful load. After A4 worked, A1 also worked a single time. However, it has failed each and every time since with all AMS slots.
-
Separate AMS: As mentioned above, I also have a P1S with its own AMS. I know for a fact it works. I tried using this AMS, but the problem persists. Again, both of these AMS units work fine with the P1S.
-
Replaced Extruder Unit: I replaced the extruder unit with a brand-new one from Bambu Lab, but this did not fix the problem.
-
Replacing all PTFE Tubes: I replaced each and every PTFE tube, the ones on the back, the ones coming from the AMS, and the one running from the top of the extruder through the back of the machine. No luck.
-
Adjusted PTFE Tension: I made sure there was minimal tension in the PTFE tubes, especially in the PTFE tube running from the extruder top to the back of the machine. The arch of the tube looks perfectly fine with plenty of arch for smooth filament travel.
-
Firmware Updates: The printer is running on up-to-date firmware.
Considering that I already replaced the AMS control board, the filament buffer, and the entire extruder unit, is there even anything else I can replace which would make a difference?
Hello there. I just recently has this same issue on my x1-carbon. Replacing the filament sensor and a hard reset did the trick. If you replaced the whole extruder unit you would already have a new one installed though…not sure this helps with that in mind. It was too exactly like my issue to not chime in though.