Originally Posted by
RainyBC
I own the Pfaff Expression 2.0 and have had this problem, but only when trying to stitch through too many layers. The only time this has happened was when I was stitching handles to the outside of a quilted bag. The handle was doubled under making it very thick. Maybe try a larger, sharper needle. I no longer try sewing through excessive thickness of fabrics using my old mechanical to do that job.
I've had tension issues sewing on 2 layers of quilting weight cotton. Perhaps if I change to sharp needles and more expensive thread the problem will be fixed. I do have a old all metal machine. What do you use this machine for?