Howdy, I have two AMS 2 Pros, one on an X1C and the other on an H2S. I’ve been running green Elegoo Rapid PETG on both of them for about a month now. During that time I’ve noticed an increase in what looks like scraped filament shavings building up around the AMS Feeder Funnel. I haven’t had an iss…

While this may not be the exact issue you have, check out this other post on this: [image] AMS is grinding filament, causing errors Troubleshooting During a 6 hour print with a lot of color changes over all four AMS slots, I get around 30-40 errors causing thi…

[image] Kioto: filament itself is defective and has a larger diameter This was my first thought also.

Did you ever find a solution to this? I am having the same issue with 2 brand new AMS 2 Pros where there is a lot of filament dust gathered around the filament intake on the AMS’s and also gathers in the 4 in One connector. It happens with both non-Bambu filament and Bambu filament. Everything is pr…

AMS 2 Pro - PETG Filament Shavings/Powder Around Feeder

Bambu Lab AMS Troubleshooting

Kioto March 17, 2026, 8:09pm 2

While this may not be the exact issue you have, check out this other post on this:

It could also be that the filament itself is defective and has a larger diameter than advertised, which is 1.75±0.02mm.