I decided that using 50 wt. cones were the only thing that worked on my computerized sewing machine. I was fine with that because I had no choice. But, I wanted to machine bind my quilt and the thread was a spool of thicker weight and I was going to do a zig zag on it. Well, my machine would do a few stitches and the top thread would get so tight it would snap. I had to get my old machine out and do it on it.
Okay, what does it mean when the top thread gets really tight and snaps? Is it the tension? And why would it get so tight with (I don't know the weight) of spools of Mettler thread. I can tell it's thicker than the 50 wt., but I don't know the weight of it. They are the small spools. Any help?