OK, I recently got my sewing machine looked at and cleaned. The folks said it is in fine working order, so I expected to be able to sit down and use it. I'm not very proficient, but I'm pretty sure I can thread the machine and do a straight stitch.
But the sewing machine is doing something funny.
It graps the top thread and winds and winds it down below the bobbin into a big thick knot. I'm not sure how better to explain it. Instead of just catching the thread once per stitch and then releasing it, it catches it over and over again forming this big ball of fabric below the bobbin.
It's an old (20+ years) Singer, that has just been looked at. The guy who cleaned it stitched a few lines, so I know it can work.
Help! We're in desperate need!