Make sure it isn't set for free motion/darning. There are two settings, the pressure at the top and the feed dogs position underneath. Some have some kind of pop up at the top and some just have an adjustment nut. The feed dogs may or may not have a screw under the machine depending on the machine. If it is a non Singer it may have a lever or buttons near the post. Check a manual to be sure how to adjust them. In any case, CHECK YOUR MANUAL BEFORE YOU FOOL WITH iT.