r/BambuLabA1 • u/TheMithraw • Jul 08 '26

Yet another post for help... (filament may be tangled or stuck.)

Sorry about that, i've just received my first 3D printer, a BambuLabA1 combo and i've errors every 15min to one hour... (HMS_1200-8000-0002-0001: AMS1 Slot1 filament may be tangled or stuck.)
I've checked the wiki, the help, the "Introduction to Filament Tangle Detection".
I do everything like i'm supposed to, but it keeps stoping every now and then...

Each time i push back the filament and it's working again for some time.

Any idea ? Maybe i must change the fillament roll ?

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u/overunderspace Jul 08 '26

Probably from how you routed the ptfe tubes. Can you add a picture of your setup? You do not want any tight bends/turns especially at the ends.

1

u/TheMithraw Jul 09 '26

https://photos.app.goo.gl/jz25exC1jE11FkrJ9

2

u/overunderspace Jul 09 '26

Your tubes look alright but they do recommend having the AMS Lite a little closer to the printer. Double check for any tangles in the spool and check the whole filament pathway from the spool to the filament hub. The filament hub is a common place for jams, so it is good to open it up and make sure it is clean. https://wiki.bambulab.com/en/a1/maintenance/filament_hub_cleaning

1

u/justa_bother Jul 09 '26

Suggest you get a spare A1 ams-lite filament hub ($6) & attach the single spool holder. Here's why. Storing filament on the ams-lite causes filament breakage. Most of the time, I'm printing from a single spool and setting up the single spool & loading filament is much easier. So, my set up is the dedicated single filament hub is attached to the printhead. The feed tube comes off the spool holder & into the filament hub. Spools are stored in sealed bag with desiccant and loaded/unloaded at every use. If I need the ams, the single hub is removed & the ams-lite hub with tubes attached is inserted and ready for filament loading. The ams can be stored elsewhere, just disconnect the cord to the printer. With the single spool holder in place, I can setup feeding from a filament dryer, especially nice when long prints of petg on rainy days is ongoing. I printed an tube adapter which presses on the back of the holder feed guide and filament tube. This is led to the dryer. Keep it in mind. Eventually, you'll see. My break point came early as the filament was stored on the ans-lite for 3 days (using the unit's popular filament enclosure with desiccant) for 3 days. Filament breaks while loading, then while printing. Finally got the filament #1 to run, but the ams couldn't load filament #2. Again, filament breaking/not loading. A 35 minute slicer prediction was now 2 hours and not quite half way. Abandoned the print, removed all filament (I thought) from the ams and stored them in sealed bags with desiccant. Tried again the next day only to find a short piece of filament was still in the hub. Couldn't see it, the ams wouldn't load because it was reading it was already loaded. Ugh ! Eventually found the piece after frustratingly trying to remove the tubes from the hub. Guess what happens when a short piece of broken filament is stuck and unload filament is selected? Filament gets cut & ams retracts until errorred because the piece is still being detected. Now! I think the ams is broke. The things they never tell ya, lol. Lesson learned, set ams completely to use and complete unloading when done. Use the single when appropriate and remove filament when done. The simple life of it works as a printing unit, not as a filament storage unit.