Originally Posted by fireworkslover

I have a Viking 875 Quilt and have always had problems w/ fmq and the tension on the underside. It, for no reason I can understand will make a rat's nest on the underside, which I believe is caused by the upper thread. Does your machine ever do this? My dealer/repair shop always tells me, "Oh it jumped out of the tension." But when I look in there after this happens, the thread appears to be sitting in the correct place. Of course, it never does it for them when they test it. I re thread the top and sometimes that fixes it, sometimes not. I'm using Superior thread too, so it's not the thread causing it to happen.