I've never had a machine start sewing by itself and then start smoking. But, that's what happened yesterday. I pulled the plug but...... don't know what happened. It's an older Viking (1970) but it has always been such a great machine. Has anyone ever had this happen to them? I'm going to take it in to the shop this week....... I can't let this machine die...... it was my first Viking.... I still love it to death.