Ok, the feed dogs have been lowered and you must fine the lever that raises the feed dogs. There should never be any pushing or pulling of fabric. It is the feed dogs on your machine that feed the fabric through. You are there to only guide the fabric with a very light hand. it is possible that your stitch length lever is on 0 (zero), therefore the machine will sew over and over in one spot making a knot.
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Ok, the feed dogs have been lowered and you must fine the lever that raises the feed dogs. There should never be any pushing or pulling of fabric. It is the feed dogs on your machine that feed the fabric through. You are there to only guide the fabric with a very light hand. it is possible that your stitch length lever is on 0 (zero), therefore the machine will sew over and over in one spot making a knot.