Okay, so I finally have my quilt sandwiched together and am machine quilting it. The top stitching looks great, but the bottom fabric is all puckered where the stitches are. I use just the regular presser foot because I can't see where my needle's going with the walking foot. I know the bottom usually shrinks up a little after it's quilted, and I try to keep it as tight as I can while sewing.
I thought maybe if I adjusted the tension on the bobbin it would help, but my new machine has no instructions for doing that. It only tells how to adjust the top tension, which isn't the problem. I don't even know if that would help.
Anybody have any ideas on how to fix this?