I had the same thing happen today. It turned out to be thread caught up Under the feed dogs. I took the plate off to clean the feed dogs and there was a little piece of thread. I could't pull it out so I kept digging around it and a big glob of balled up thread popped out. I could not see the glob at first and was about to give up, thank goodness for magnifying glasses.
Last edited by QuiltnNan; 09-26-2019 at 02:16 AM.
Reason: shouting/all caps