Originally Posted by mar32428

This is an old quilter's trick. As you wind your bobbin, stop after a few turns and mark your thread with a color marker for about 12 to 15". As you sew, you become aware that the bobbin might be getting low and when you see that colored thread, you know it. It has saved me much frustration especially when I'm sewing long SITD or assembly sewing. It's not rocket science but it works.