Around the beginning of the pandemic I replaced the dead stock extruder on my Taz 6 with a SE 0.5 mm extruder. The installation and firmware update went smoothly, the filament loads, and superficially everything seemed fine.
Problem is that it would stop extruding not far into a print. I thought it was plugging, and kept cleaning, reloading, and adjusting tension to no avail. Never got a good print out of it! But I think the problem is with the hot end fan mounted adjacent to the drive.
Notice in this movie that at full temperature the fan doesn’t turn. It wiggles, but doesn’t rotate though there are no obstructions. The drive gets really hot, the filament softens, and it can’t gain purchase anymore. Also makes the filament difficult to remove since it turns all stretchy, and the tension knob gets too hot to adjust comfortably.
Is this a defective tool head, or maybe a firmware problem? Clearly it’s trying to do something. Any advice or comparable stories would be helpful!