Glad you are back sewing at any rate. You probably did the right thing..... take a break and walk away for a while. Perhaps your machine is known for this kind of problem....might be worth having your serviceman take a look sometime. also don't forget to check out the library for a book on Sergers - questions and answers.....there are some good ones out there and perhaps it might give you an idea of what is causing some of your difficulties. Good luck and I am glad you are able to get back to your project.