I purchased my Mini just before the Mini 2 came out, then left in the box for 4 months more. I’ve printing constantly since then using PLA from Esun and Push. For the last 3 weeks I’ve been having a problem with my filament jamming just above the nozzle. At then end of a print job, the filament is too large to re-enter the nozzle. I’ve had to unload the filament, trim the expanded portion, and then AFTER auto-leveling, when the nozzle is almost to temperature I can re-load the material as the Mini begins printing.
When I try to print something without doing this, the hob grinds out the material instead of forcing in into the nozzle. I’ve tried all matter of heat settings to no avail. My fans are all working properly, and my air ducts are clear.
I am at a loss after trying everything I could find in other posts. Since the air ducts look like some of fan housing mods already, I have not replaced them. Nor have I tried a new nozzle, although I have several E3D nozzles available.