During the shutdown, I have custody of LMN’s Prusa MK3 printer. I’ve been making face shield parts as part of the MSU/LMN effort, and pushing it pretty hard. It’s been a champ, but yesterday a problem surfaced.
The extruder is putting out just a thin wisp of filament, measuring about 0.25mm (it has a 0.4mm nozzle). It doesn’t adhere to the bed because it’s so thin.
I have tried the “cold pull” several times, following Prusa’s instructions. This involves heating the nozzle pretty hot, manually pushing lots of filament through, letting it cool, and yanking it out. It looked like I was getting some contamination out that way. But that didn’t fix it.
I think it might be the feed mechanism. When I push filament by hand, it comes out pretty thick. But it’s still a thin wisp when operating.
Anyone have advice?