I’ve run into an issue with the AMS (connected to X1C). The filament (PLA-Tough) is in Slot 1, though not loaded. The AMS thinks it is and when I try to load another slot, it attempts to unload Slot 1 and return the error message: "Failed to pull back the filament from the toolhead to AMS. Please check whether the filament or the spool is stuck. After troubleshooting, click the “Retry” button. [0700 8004 125123] "
I checked and there are no remnants or broken filament pieces stuck in the head/nozzle.
I tried a power cycle to no avail.
I disconnected the AMS and loaded filament from the outside and ran a small part. The print was successful.
I reconnected the AMS and it still tries to unload Slot 1 before attempting to load another slot.
I read through several similar incidents but did not find a solution.
Thanks in advance.
Sounds like first stage feeder is broken, probably just the filler funnel. If the light is always on for that slot even when no filament is in there the ams thinks it has filament. Try to clean out the filler funnel and see if it goes away, otherwise replace the filler funnel or whole first stage filler.
Thanks for the response. I found out that there was a short segment of filament in the tubing underneath the filament nest of the AMS. I cut a short piece of filament and fed it into each of the four feeder openings. Every slot except slot 1 fed in about 5 inches of filament (manually).
I removed the two screws that hold secure the nest and carefully lifted it out. Removed the tubing from just under the slot one feeder and pushed out the broken filament. Not sure how it broke in that area.
I ran into a little obstacle when one of the ribbon cables disconnected. Once connected, I reassembled the nest and loaded filament. The test print worked fine and I’m back in business.
I should have taken some pictures.
I can’t seem to make a new post yet. I’m having an issue with a similar error. I just got the X!C and the AMS will not feed filament all the way to the extruder. The Bambu labs filament goes further but gets stuck just like the other brand filament I got. It doesn’t even reach the exit PTFE tube of the AMS. It gets stuck and I can’t push it further and if it engages the motor it just chaffs the filament in place.
Also, when I try to just directly insert into the printer without the AMS, the extruder stops it and doesn’t seem to move at all as if it’s not sensing that the filament has reached it. It used the motor to pull it in an inch or so, but stopped and gave an error.