filament on wires and nozle
So i let the printer, print overnight and when i woke up there was a big plastic circle around the nozzle, wires fan etc. It had a diameter of probably 3 or 4 cm. I cleaned it up by turning on the printer so the plastic would melt and i was able to take it off. Now the filament is stuck and i cant load or unload it. The printer wont push out filament. I suppose the hot plastic caused problems to the wires or something. Im using a Prusa mini+, anyone had the same problem?
RE: filament on wires and nozle
Probably the wrong category for this but may as well just answer your question seeing as you're new to the forum. This happens when the print detaches from the bed and the rest of the print job is just extruding melted plastic into the gradually growing glob around the hot end. If you're careful when you remove the glob, you can successfully fix it without damaging the wiring. Then you can just clean up the heat block and surrounding parts with a wire brush (be careful with the brush around the wires especially if the heater is on).
If you're not able to remove the filament you may need to do it manually. The filament drive gear has likely ground a notch into the filament after it was unable to push it any further into the glob. You can try pulling the filament manually as it is retracting. If that doesn't work you may need to remove it by unscrewing the bowden tube and removing it that way. After you're done, open up the door on the extruder motor and blow it out with compressed air to get rid of the debris that built up during the glob event.
Why did the print detach? It could be that the plate was not clean, or the print could have curled up on an edge and caught the nozzle on a subsequent pass (this happens when you have thin overhangs). You can try cleaning the plate with ISO or if you have a smooth plate you can also try using acetone to refresh the grip (do not use acetone on textured or satin plates though). It might be helpful to add support under the overhang or change the orientation of the model to reduce overhangs, if that was the problem.
The technical term is 'Blob of Doom', you will find several threads here.
The stuck filament is probably a combination of overcooked filament in the hot end and a ground down section at the drive gears.
These may help:
https://help.prusa3d.com/article/clogged-nozzle-hotend-mini-mini_112011
https://help.prusa3d.com/article/cold-pull-mini_126399
Cheerio,