Hello! I’d be grateful for any help anyone can offer with my printer problem. The forum instructions say to give lots of detail, so here’s the saga:
Filament isn’t coming out of either of my 0.4 nozzles (hardened or stainless). My 0.2 and 0.6 nozzles print fine, so I’m guessing it’s not an extruder issue. (I checked the extruder for broken filament anyway, and found nothing; I also tried extruding just the filament without a nozzle installed—both PLA and eSun 3d printer cleaning filament—and they went through fine.)
When I attempt to load filament into my 0.4 nozzles, the filament goes in a bit but then stops, extruder clicking. One of them had some black on the filament when I did a cold pull, but even after it was coming out clean, filament wouldn’t go through the nozzle (PLA or cleaning filament). The ends of the cold-pulled bits look to me like they weren’t actually melting (see picture)
even though the nozzle was reading as hot, and moving my hand close confirmed it was putting off heat.
My stainless 0.4 nozzle was working great for me over the past six months I’ve had the machine. Then one night, during a several-hour print, the filament stopped coming out. The machine kept trying to print even though there was no filament coming out—no error message—and boy was that filament jammed in tight. After I cut it and took the hotend out, it took a fair bit of yanking to get the filament out of it, even though the nozzle was around 220 degrees when I removed the hotend to pull the filament manually.
When the stainless 0.4 started refusing to extrude I’d thought maybe that hotend was going, so I switched to the hardened 0.4 , but it behaved normally for only a few days of printing before ceasing to extrude.
All nozzles are from the Bambu store, bought new, and I haven’t made any modifications to the printer or its parts. Aside from the eSun cleaning filament, which I tried today, I’ve only ever used PLA.
Regards.