I've done a fair bit of looking around for an answer and have yet been unable to find one.
So here is my problem, after about 200-300 mm of extrusion, the PLA stops coming through the nozzle. When I pull the PLA out it looks like this. There are teeth marks going up the PLA and end with a small divot. The head of the PLA is slightly thicker than the rest of the PLA; approximately 1.9 mm.
I first noticed this when I thought that only the bottom layer was being printed. I moved to printing a small bullet and I got about halfway through the print before it stopped extruding.
Next I raised the Z position to about 100 mm to give me some room to work and I manually moved the PLA through the extruder with the dial. No problems until I hit the 200 mm mark or so. I've done this test 4 times now and failed at the approximate locations: 208 mm, 280 mm, 250 mm, and 325 mm.
- Nozzle: 200 °C
- Bed: 60 °C
- Layer Height: 0.15 mm
Other things I have tried with seemingly no effect:
- Turning off/on print cooling
- reducing retraction to 2 mm from 6 mm
- yelling out in frustration
- reformatting the SD card (because who knows?)
- brand new filament, older filament, middle aged filament