Yes, my bobbin stops when it is full also. That seemed to be the problem that day unless it really wasn't the problem and it just happened to start working after I changed it> haha..Okay that was heading for confusion. Now, the only problem I am having is my Jack Russell, Milo, trying to "hunt" for spools of thread that I somehow overlooked when I dropped them and chewing on them. GRR...He had one and I realized what he had and took it away, then he seemed to have a "stash" haha..sounds funny, I know and he took that one and ran and I had to go chase his butt down, just now. Now, he is in here hunting for more. THankfully, there are NO more on his level. LOL.