I had issues with the filament buffer not having the right conductivity resistance. Bambu support walked me through what I needed to do diagnose it and they sent me a replacement. I was quite pleased with their support.
I too within a week of getting my new AMS had a stuck piece of filament hiding in the filament internal hub. I had some clear plastic coated antenna quidewire that was a very small diameter. I guess its 3mm or less, must be less. I cut a couple of piece off of different lengths, to give me "multiple versions of this tool: This stuff is perfect for shoving through ptfe tubing. Its stiff enough to not fold or bend, yet its flexible enough to make any curve. Highly recommend. Canāt locate the link to the kit on Amazon, sorry.
Hi, did anyone had any luck with loading the D20 or A70 TPUs into the A1?
I can not really feed it to the extruder properly, previously I have been using it on a cheap printer with direct extruder that it did surprisingly job with, however, it is too squishy to feed properly into A1 (both through the Tube and without it.)
Anyone had similar issues?
This fixed mine that failed to extrude outside the AMS casing on first day. I took it apart, manually ran filament through the 5 into 1 unit inside by winding it in with the gear after taking it apart and all good
It seems that choosing āunloadā on the front panel Vs doing it in software upset mine. Thanks so much for the tip.
I had the same problem but i may have a fix, disconnect the ams tubes and putv your external back on, load the external till you see it come out your hotend, unload via your machine in your filament settings, once you have done that put your ams tubes back in and feed your fillament about inch away from ams into your machine, do not load these from here, find a simple 1 colour print and print it, this will then pull each filament through, had no problems doing it this way and i have had no problems since and swapped filaments every day, i hope this helps
In had updated the firmware to the 1.08.03? and then had a āmaybeā similar issue. iāll link a video if i can. At first I tried downgrading, Iāve tried factory reset 
I did end up getting a different issue, and I took hub apart and fixed the magnets.
This filament stop/retract/reload/till fail sucks.
Itās acting like its testing the taut-ness of the wire. If I give pressure to the spool it loads fine. Itās a lot like they inentionally stopped spools that I own. I dont have any bambu to test. My vendor didnt carry it, and I have to use vendor purchases.
Every slot does this, multiple vendors and filament types. Only in the AMS I have that I updated the firmware. My other unit doesnt do this, not updated. Smoeone suggested a motor issue, but that doesnt make since to why my finger can change the reaction.
Symptom:
Add pressure:
I have downgraded back to 1.07.03 and the AMS 6.4. Still happening.
Iāve cleaned everything.
- Canned air the tubes
- Took the Hub apart and fixed the magnets. checked the cogs/wheels
- checked the first stage loaders and the mechanisms seem fine.
Iām going to check the support shafts and drive wheel next, but this is rediculous ā¦ Occamās razorā¦ would suggest. My printer was working fine. That night I upgraded the firmware. Next morning then printer wouldnt work right.
ive had something like that with my brandew p1s comb. opened up and tried to doa test print and the filament would only get to the extruder gear and thats about it. i have a ticket out with bambu about this.
THIS!!! This solved my issue. AMS stopped feeding in the middle of a print. Loosened the 4 screws and it is fixed! Big thank #Godo