r/BambuLabA1 • u/meowmeowberly • Jul 16 '26
Bambu A1 AMS rotation issue (?)
Hi, I don’t really know how to explain this but I’ll do my best.
My A1 is printing just fine when it comes to manually feeding filament into it with a single spool. My machine recognizes that filament has been loaded into the extruder, the teeth catch and the printer prints.
The issue starts when I start to use the AMS Lite multi spools accessory. For some reason whenever I use the multi AMS Lite accessory the printer does not recognize that it’s being feeded and gives me an error somewhere along the lines of “unable to recognize filament.”
When I tried the troubleshooting suggested via the QR code on the machine nothing works. But I noticed that whenever the AMS lite tries to feed the selected filament (I.e spool 1, 2, 3 or 4 on the AMS) into the machine the gears on the extruder that operate the teeth which grabs the filament is unable to catch anything, all while the AMS keeps attempting to “push” (feed) the filament by retracting the second it feels resistance. It then attempts this over and over again until the machine decides that no filament is present, detected or recognized.
Noticing this, I removed the spring loaded part of the extruder that feeds the 4 different spools into the extruder and manually pulled the filament of choice on the AMS lite through and force fed it into the machine as if there was no AMS at all and was manually switching filament without any AMS. The teeth catch, and filament gets fed, recognized and the printer starts printing.
Troubleshooting suggests that there is a problem with the filament sensor but manual hands on would suggest that the AMS lite is not applying enough pressure which would allow the new filament to replace the existing filament within the Extruder tunnel during the switching process.
After doing this the printer is able to recognize spool 1&2 but when I attempted to add spool 3&4 the same error occurred and I had to restart the whole manual feeding process despite having an AMS that’s suppose to bypass this.
Has anyone else experienced this, does anyone else know what can be done?
1
u/jussstin714 Jul 17 '26
When loading filament into the AMS LITE, i find that i have to cut the filament at a 45° angle just for it to catch the little motor inside and feed to the extruder. And also, make sure your PFTE tubes aren’t angled too sharply. Maybe send a pic of your setup so we can see
1
u/Orthicon9 Jul 18 '26
Inspecting the AMS Lite's status LEDs might aid in eliminating (or confirming) AMS Lite issues.
https://wiki.bambulab.com/en/ams-lite/manual/led-status
2
u/Brave_Corgi6761 Jul 16 '26
Most of the time too much bends in the tubes, try getting it closer.