I am quilting littlest goddaughter's quilt. I have done the centres of the blocks, with the walking foot on my Megaquilter. No problem.
Now I am stippling the sashing and corners of the blocks. I started on my Megaquilter, which has a nice big harpspace and stitches beautifully. I love quilting on it. However, it has been a serious pain. The top thread is breaking, sometimes after an inch, sometimes after 6 inches. I don't think I managed a stretch of more than about 4 feet. Everything else, absolutely fine. I loosened the top tension to the point where I had to tighten it again because it was getting loopy. I changed the needle (although the thread wasn't getting shredded, so I didn't really think it could be the needle). I checked the bobbin case and needle plate for burrs.
I have had this problem with it before, and didn't find a solution, but it wasn't this bad.
After a while I changed to my Husqvarna Viking Topaz. The harpspace is smaller (although not bad), the stitching is fine, but not as nice, it has a slight tendency to skipped stitches (which the Megaquilter never does), but I decreased the pivot height and reduced the top tension (this always needs doing for anything other than normal stitching) and it was OK, but... then it started shredding the thread. I tried an embroidery needle, an anti-glue embroidery needle (it really hated that one, although it loves it for embroidering), a top stitch needle (very, very bad for shredding) and finally, a quilting needle (not a make I know, which is why I left it til last). That was a bit better, but it was still shredding.
Is there an answer? If there is, please tell me before I throw two machines that I generally love out of the window...