Filament seems to be getting squished and crushed inside the extruder gear thing

[TheVirtualTim]

Here’s the post showing where the wire is located on my TAZ Workhorse … which also uses the RAMBO board. There’s a photo in this post.

New Taz Workhorse, can't print

Without that fan running you’ll get heat-creep which will eventually result in a filament jam. The extruder has a “hot” and “cold” end … separated by a gap they call the “heat break”. The design is to allow the hot end to get hot… but the gap prevents heat from easily transferring to the cold side. The heat-sink and fan on the cold side deal with any heat that does manage to creep across the heat-break gap. But if the fan isn’t running, heat will migrate and eventually heat the cold end to t…