Originally Posted by
brandeesmom
Yes as cashs-mom said, if your machine does straight and zig zag stitches, the straight stitches will have a bit of a wave to them. It may help them to stitch straighter if you use the straight stitch plate on your machine.
If your machine has a "step motor" which means the needle motion is up, over, and down, the stitches will be offset. The step motor allows zig zag motion. Machines with straight stitch only, ie, a Singer 221, the stitches will always be in exact alignment.