I too have a Bernina 1530 and have used my walking foot many times. I think it may be the Minky. I haven't tried it myself but it is stretchy that your lower presser foot or the walking foot may be having trouble moving the thick fabric. I would try making a small practice quilt out of two pieces of scrap fabric with batting stuck in the middle. I always test run the machine to make sure everything is correct before starting on an actual quilt. I have even read on how some of the long arm quilters are having problems with Minky. If it is the Minky, you might just want to do like a tied quilt using your zig zag stitch set at 0. Good Luck !!