It seems I have a problem with the extruder not gripping the filament.
This is what I have: [
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When doing a print, almost no filament comes out of the hot end. If I disengage the extruder and push the filament by hand it extrudes just fine, so there is no jam. When the extruder is running I can see the motor shaft turning fine, so it doesn't seem to be an issue with power, but rather slippage on the filament. I've tightened it, loosened it, and nothing seems to make any difference. Any ideas?