Thank you. I wish that would solvie my problem. I found out early on that I needed the Class 15 bobbins, and I got them. I didn't have the problem right away, but after about a month I noticed it occasionally and thought maybe it was a quirk or maybe the digitizing. But, almost every design I do that requires the satin stitch around the outside shows the white bobbin thread and sometimes when there's a fill area of satin stitch on the design itself. People say to use the same bobbin color as the sewing color, but gosh, that's a lot of changing the bobbin, not to mention, my bobbin winder on the machine is unreliable at best. I wind bobbins when I need to using my 180D. Now, that's a workhorse. Only thing is, I can't do a lot of in-the-hoop projects because most of those are for the 5x7 hoop. And, the in-the-hoop projects almost always have the satin stitch outside border!!!
I was wondering if something like timing could affect that. But, I just got the machine back from being serviced, and it's still doing it. They always leave a piece of heavy fabric like denim, in the machine with a stitchout on it. And of course, there was nothing wrong with their sample. You can never replicate the problem with the repairman, whether its a car, refrigerator, or embroidery machine.
I do appreciate your input. Thank you.
Mary Anne