The stitch is loose on the fabric. Adjust Edge Guide to allow more material to get into the stitch. Tighten Thread Tension(s). You may have the wrong Crochet Machine for your particular application. The main Cams fix the width of the stitch in these machines. You cant make an 18-E (1/2") produce a _" stitch by tightening the Thread Tension, or changing a Finger Plate.