Hello, I have been printing for 1400 hours. I was printing correctly and in the middle of printing I saw that no filament was coming out of the Hotend.
I thought it was a clog, so I checked the extruder and the hotend. I even did several times the unclogging procedure (cold and hot pull) with the hallen key.
The hotend I was using is the ObXidian one. I reassembled everything and the filament was loading fine from the AMS, but it wasn’t purging anything.
So I replaced the hotend with a new standard one to discard a hotend clog, it was still giving the same problem, no filament coming out of the hotend and the printer not detecting any faults. I suspect it may be the extruder.
I have also changed the filament and nothing, no filament comes out of the hotend.
I have the same issue.
Printing Bambu PC (Tested translucent grey and also a fresh roll of black PC filament)
Extrusion stops at about 70% progress with both filaments on a small print.
That happened to me with a model that had a LOT of retractions with ABS. Heat creep enough right after the extruder into the hotend. No sensor trigger and there was a boatload of chewing debris in the extruder gear. No damage to the gear itself though, but it did need a good brushing and I had to reduce retraction for that model just so it wouldn’t do it again and again.
Printing with the door closed on a hot day caused the hot-ends heatsink to struggle so the problem was heatcreep. Causing the filament to get stuck at the bottom of the heatsink while printing-hence the extrusion failure. Also the morphed filament got stuck in the bowden tube on its way back into the AMS so I had to cut off the morphed filament that was hanging out the end of the bowden tube where it attaches to the extruder so the AMS could retract it again.
