Oops!
I was sewing along, putting on binding, and kept hearing something bump. I reset the bobbin, and finally looked at the back of the machine. The green thread had fallen over on the power strip, so I set it back some, and sewed some more. It kept bumping, and I finally investigated. While the fly wheel (I think that’s what it’s called) was still on, I was pulling out the thread that was wrapped around until it broke. Then DH popped the cover off the wheel, and I was trying to cut and pull out thread, and it still wasn’t coming out very well. There is a large screw holding the wheel to the drive shaft – or whatever that’s called – and he gingerly tried turning it – it worked – and the wheel came off. This is what it looked like when he took it off. That cone of green thread (Superior Sew Fine) had been nearly full. I usually use that thread on the Black Bart (longarm), but it matched the previous binding. Strong thread - it never broke until I pulled too hard trying to remove ...