I switched recently from Prusa to my new (10 days now) X1C. And i must confess, i was deeply impressed. Fast prints in a great quality.
But 2 days ago i experienced a strange problem. First my AMS did not recognize new filament via NFC. And my printer is convinced that he got external filament from the spool holder. When is try to unload he alwas stops at “Pulling back current filament” and “Please pull the filament back from the extruder”.
Fun fact: I have disconnected the AMS and rebooted the machine. When i do this, i am able to load external filament via Spool holder and i can print. When i the say unload, i’ll get the same problem in step 3. He unloads the material, i pull izt out, but he is still convinced that there is some material in the extruder. After another reboot, i can feed again new Material and i can print.
What i have done was updating to the new firmware, that failed once because of an outage in the internet connection, but i was able to update a new after that. I exchanged the original 0.4 hotend to a hardend steel hotend (and i was able to print afterwards).
Any help would be deeply appreciated.
Best regards
Axel
Same here, my Bambo X1C is not usable until the next upgrade.
The issue is very Frustrating, I can’t use my printer, banana bed also.
Bambu is going to move in the wrong direction with upgrades and with solving issues.
It seems that in my specific case the filament sensor unit attached to the extruder is not working.
I removed the sensor unit from the extruder but kept it connected to the electronics.
When i push filament through the sensor or when the sensor is empty, the software always says, there is filament in the sensor unit. So it shows a green dot instead of a white one.
It seems that i have to replace the sensor unit. I will keep you updated.
So, today the replacement for the filament sensor arrived and guess what …
It seems, that after exchangig the sensor everything works again fine.
Right after booting the display showed a white dot, not a green one, so its able again to see the correct status. And - the AMS is able to recognize the correct filament etc.
I will test it now with a longer print, but i think this was the solution …
By the way, Bambu Labs was really fast and competent with diagnostic support and shipment of the replacement. Chapeau!
Yea, just got this error today after only one week of use. Was hoping to find a solution that did not shut me down for days waiting for a replacement part… but that seems to be the case.
Well perseverance wins this one… took the sensor apart and found that the sprung metal piece got stuck on a little shelf just next to it. Dislodged it, it fell back into the channel and was operational again.
thanks for posting this… it pointed me in the right direction to troubleshoot.
I had the same issue, I just pushed filament from the manual feeder(Tube) and did a few second of it manually feeding … then manually released the filament and all was good.
Same issue with the error. Was fixed by removing and clearing the sensor which had about 4mm of filament stuck in it. Note to self, always dry the filament that has been sitting out for a while, it turns brittle AF.
I have same problem also, after clearing the filament sensor/Extruder still same, print and feed protector, almost work. Then boom , I touch the ams hub loader at the back of printer move and touch the spring and everything back to normal. It’s the ams booster at the printer backside. The spring is in the middle part, maybe need to move a bit or what. Hope this help.
This happened to me recently. I tried clearing the extruder and the AMS. It wasn’t until I saw this post that I removed the filament sensor. There was a piece of filament broken off from the last print. I removed the filament and reassembled everything. It is printing again!!
This printer seems to be very sensitive about filament that is dry and/or brittle. At least the AMS is. This recent issue was newer filament that has been in my AMS with desiccant. In my opinion, this should not have happened.
Can’t get it to go away.
