Low Tech Low Bobbin Warning

If your machine doesn’t have a low bobbin warning light or system (and even some of the high end, high cost models don’t), you can still have a warning system in place with a little extra effort. Wind two bobbins with the thread you intend to use, and use one of them on the top thread spindle. You’ll be able to see when the top thread is about to run out, which will mean the bottom thread is almost gone too!