The old sewing machine is out of touch with the wrench
The position of the feed cam on the axis of the sewing machine moves;1. Pin the rod to its lowest position.2; there are two fixed screw feed cam, unscrew the two screws.3. Turn the cam, place the screws facing the side of yourself on and off, and then screw the screws.
Normally, the first line is a big stitch, the second line is a small stitch, and the third line is the reverse seam.
