Originally Posted by ginnie6
ok that confirms what I thought of mine then....I have too much of the bobbin thread showing.....its like a straight line with loops of the top thread on it..
That usually means the top tension needs to be tighter (and/or the bobbin tension needs to be looser).
With quilting as with sewing, the top and bottom threads should lock in the middle of the stitch. Usually there are tiny dots of bobbin thread showing on the top, and tiny dots of top thread showing on the bottom. (Ideally both of these dots are buried inside the quilt sandwich, but that is not always possible.)
The easiest way to check your tension is to run you machine with the widest zigzag stitch possible. A zigzag will show up a tension problem more clearly than a straight stitch. Once you have the zigzag stitch looking good, switch to a straight stitch and check that. It's good to make up a practice quilt sandwich swatch for adjusting tension before you work on the real quilt.