I've been having the same exact issue with the black PLA-CF I got from Bambu last week. It's not actually the AMS that's the problem - the filament is hardening in the hot end as it cools down, before the AMS retracts it, so it's 'stuck' - it's not ACTUALLY stuck - if you go to the rear of the printer, take off the PTFE going into the printer, and give the filament a little tug, it'll easily come free - then you can retry the AMS retraction and it'll be fine. It's just solid enough that the AMS rollers can't free it (and even by hand at the AMS you won't be able to either because of the angles the tubing takes).
It's a bummer cause this stuff actually prints incredibly well; the surface finish and strength is really impressive. It's just really inconvenient to have to manually yank it loose every time. If the slicer would just keep the temperature SLIGHTLY higher at the point the ams retracts, I think it'd be fine.
Ironically the CF nylon from Bambu doesn't have this issue at all :/
I have the exact same problem. After the print finishes i get a error message and the filament is stuck. Sometimes is comes free after retrying it, sometimes i have to pull it out from hand, then the ams retrieves it.
I love the material, the surface finish is incredible. Whats the fault? Hotend too cold ? Where is it stuck ?
The last block I had was a break I couldn't see from removing hoses. I took the hot end off and just pulled the snapped piece of filament of.
Just speculating - but maybe friction of the filament in reel as it's being pulled? It's like something is hanging up..
Oh - I did find the error messages - in the Bambu Handy IOS app under profile -> chat icon in top right of the app.
After a little looking around, it seems to be caused by the abrasive filament rubbing on the PTFE teflon tubing coming off the hot end. Because it's not smooth, the AMS is not able to unload the filament due to the friction against the curved PTFE off the head. Bambu actually has an STL with a support for this PTFE tube but someone modified it a bit, I literally had this issue today and am now printing it. It recommends something better than PLA but the PLA-CF is all I have at the moment so I'm printing one to test it out until my filament order comes in.
[https://www.printables.com/model/338073-bambu-x1-ptfe-extruder-bracket-ams-error-fix](https://www.printables.com/model/338073-bambu-x1-ptfe-extruder-bracket-ams-error-fix)
Yeah it helped a lot with this error. You do need to check your PTFE tubes daily if you use a lot of CF filament. The material will wear down contact points easily.
Do you guys all has the the x1 carbon with the top glass installed?
I did troubleshooting today on mine (having the same issue) and it seems if you retract without the glass/ams on the top it’s fine. The tube coming out of the head seems to be the culprit. Lots of resistance due to the angle.
Removing the top glass seems to change the angle just enough that the ams can pull it back.
I've been having the same exact issue with the black PLA-CF I got from Bambu last week. It's not actually the AMS that's the problem - the filament is hardening in the hot end as it cools down, before the AMS retracts it, so it's 'stuck' - it's not ACTUALLY stuck - if you go to the rear of the printer, take off the PTFE going into the printer, and give the filament a little tug, it'll easily come free - then you can retry the AMS retraction and it'll be fine. It's just solid enough that the AMS rollers can't free it (and even by hand at the AMS you won't be able to either because of the angles the tubing takes). It's a bummer cause this stuff actually prints incredibly well; the surface finish and strength is really impressive. It's just really inconvenient to have to manually yank it loose every time. If the slicer would just keep the temperature SLIGHTLY higher at the point the ams retracts, I think it'd be fine. Ironically the CF nylon from Bambu doesn't have this issue at all :/
The temp before retracting is 230c, should be good i think? Before the ams is retracting the filament get cut, so the hotend temp doesn’t matter ?
I have the exact same problem. After the print finishes i get a error message and the filament is stuck. Sometimes is comes free after retrying it, sometimes i have to pull it out from hand, then the ams retrieves it. I love the material, the surface finish is incredible. Whats the fault? Hotend too cold ? Where is it stuck ?
The last block I had was a break I couldn't see from removing hoses. I took the hot end off and just pulled the snapped piece of filament of. Just speculating - but maybe friction of the filament in reel as it's being pulled? It's like something is hanging up.. Oh - I did find the error messages - in the Bambu Handy IOS app under profile -> chat icon in top right of the app.
After a little looking around, it seems to be caused by the abrasive filament rubbing on the PTFE teflon tubing coming off the hot end. Because it's not smooth, the AMS is not able to unload the filament due to the friction against the curved PTFE off the head. Bambu actually has an STL with a support for this PTFE tube but someone modified it a bit, I literally had this issue today and am now printing it. It recommends something better than PLA but the PLA-CF is all I have at the moment so I'm printing one to test it out until my filament order comes in. [https://www.printables.com/model/338073-bambu-x1-ptfe-extruder-bracket-ams-error-fix](https://www.printables.com/model/338073-bambu-x1-ptfe-extruder-bracket-ams-error-fix)
did it help?
Yeah it helped a lot with this error. You do need to check your PTFE tubes daily if you use a lot of CF filament. The material will wear down contact points easily.
Do you guys all has the the x1 carbon with the top glass installed? I did troubleshooting today on mine (having the same issue) and it seems if you retract without the glass/ams on the top it’s fine. The tube coming out of the head seems to be the culprit. Lots of resistance due to the angle. Removing the top glass seems to change the angle just enough that the ams can pull it back.
This worked for me
Exact same problem wit a new X1C. Will try the PTFE Extruder vom Printables. Thanks!