So I’m now sewing with my pieces of felted wool sweater, using a zigzag stitch with minimal seam allowance which is giving me a great serged-like edge…but the seam is wiggly, lettuce-y (the technical term escapes me), which I don’t want. Even though I’m doing my best not to pull or push the fabric over the feed dogs–though it sort of does seem to require that a bit to keep from catching. What am I doing wrong?
Wrong tension, too short of stitch, wrong needle? Felted sweater fabric is medium thick, using 16 jeans needle.