Ok, a little color on the above. I pulled out the 3.00mm and put back the Ultimaker-provided 2.85mm. The filament had a groove in it. At some point, for some reason, the cogwheel just kept spinning at the same point and dug a groove in the filament, so it clearly could not move forward. I tried printing the chest last night, again with the Ultimaker filament, and about 80% through it stopped (grrr). When I removed the filament, there was that groove again. But of course, it got most of the way through the print first. So two scenarios:
1.) On the print of the chest, it actually looks like the filament got tangled on the reel. Of course, this did not appear to be a factor in the two previous times this happened. Still, has anyone had issues with the tangling of the filament? Is this just a case of my being more careful in handling the reel?
2.) Could the issue be the filament feeder itself? I made no changes to anything on that unit since opening the box and have made maybe 10 prints. Would the unit get maladjusted that quickly, and how to I solve? Would it be so sensitive that it would not take the 3.00mm filament, or do I need to make an adjustment for it to take that filament.
Thanks.