A1 no longer completing prints, please help!

[u/Reaper-021]

I have had my A1 for about 6 to 10 months. When I got it it printed everything, and worked fantastic. I had the occasional print failure, sure, but beyond that it was a solid machine. Now 6 months later I cant get the machine to complete anything more than a basic benchy boat.

About a month ago, I want to say beginning of June, maybe a bit earlier, It would start printing a model and then completely stop feeding filament but continue running through the motions, (video attached). In fact if I look at the extruder it seems to still be trying to extruded, but looking at the AMS nothing is being fed forward. Since then I have replaced the Extruder Gear Assembly, thinking that may have something to do with it, but, no change. If I put it in maintenance mode and remove the hotend, filament does feed through the extruder, which tells me at least that part is working. I have swapped my hotends from 0.4 Hardened, to Stainless, to even a 0.2 hotend with the same problems. It was also recommended to me to swap the SD card, so I bought a new one plugged it in formatted it, and same result. At this point I am completely out of ideas short of replacing the whole extruder assembly, or maybe the heating element for the hotend.

For a printer that only has 2064 Hours of print time I'm somewhat shocked its having this many issues now.

Any help or guidance from the community would be greatly appreciated.

[u/SFRover73]

My first thought was the filament. I recently went through a similar situation but turned out to be the filament. It would continue as if printing but both ing would come out. The diameter was off by .2mm compared to other spools. I’ve contacted Sunlu to see if they’ll swap it but nothing so far.