On thicker fabric ( lining, batting and top ) you have to use a longer stitch length. On the newer machines a length of 3 and on the older machines a 4. The reason is because the feed dogs have a much heavier amount of fabric to move and they need to take what us called a bigger bite to move the fabric. Practice doing this with a sandwich of lining, batting and muslin scrap and you will see the difference. Your quilting will be nice and smooth and see how much smoother the walking foot works with the longer stitch length. Good luck.
Last edited by Carol Jean; 02-24-2017 at 05:13 PM.