I've had my Bernina with the stitch regulator for maybe 4 years. All of a sudden, in the middle of a big queen size quilt, it won't quilt.
In the middle of quilting, it will start throwing loops on the bottom. There's a very unpleasant knocking sound that's intermittent, but very frequent; maybe 70 of the stitches. It makes this sound even when the stitches are ok. I've taken it back to the dealer 3 times now.
Every time it messes up, I stop, get out a test piece of material and batting and try to make a sample of the garbage, but then it starts working again. I've used up all my spool of masterpiece thread ripping out stitches from the quilt and making test samples.
They don't really ever find anything *wrong*, but they have seen it make the sound and throw loops... Also, they've seen the BSR audio signal fail to beep even when I've set it.
I've changed needles, bobbins, and thread, trying to elminate anything that could be wrong. It behaves the same no matter what.
I'm getting so frustrated. I just don't know what to do.
Susan K