I've been printing with PLA and PVA, and one day the PVA stopped feeding correctly. I tried a bunch of things, like hot/cold pulls and drying the filament, but nothing worked. I replaced the BB print core and it started printing correctly, but the print would periodically say "out of PVA filament", requiring me to click Continue. After clicking Continue, it would usually print PVA correctly, but after a few times (over the course of an hour) it stopped.
So, I tried unloading the PVA and re-loading it, which has helped before. When the printer tried unloading the PVA, I noticed the motor would suddenly stop with a horrible sound. Here is a video of this happening:
Can someone tell me what's going on here with the motor? How do I fix this? What could have caused it?
Thank you for any help you can provide.