Cold extruder or hot end ? When it gets to a point it gets this bulb on the inside of hot end and won't put out any more filament e3d v6 knock off hot end at 215 pla Bowden upgrade knock off cold extruder came with no specs 1.75 filament is this an extruder calibration issue ? Thanks for any suggestions .?
Maybe your Bowden tube is not inserted down to the very bottom of the hot end ?
Turns out I needed to ad a fan to hot end . these things are touchy .
I had to ad a second one.
Are you referring to a printed part cooling fan, or a second heat sink fan ?