The knob on the pillar (over by the bobbin winder) is a screw. It takes something like 7 complete turns to go from longest stitch to shortest (which is actually almost no feed at all) if I am not completely confused to "tighten" the screw (turn it clock wise) to lengthen the stitch. When it is all the way tight it should be obvious and the screw will "bottom out" and just not go any farther. At this point you will be making around 5 stitches per inch. Good luck and be sure to keep after the oil and cleaning and moving a little at a time (even back and forth) because it should be an easy finger tip controlled when it is all working correctly. Good luck and keep us informed.