What is the difference between serging, overlock, flatlock and coverstitch? -Joan, Lakeland, FL
Each of the topics that you listed are accomplished using a serger. Serging is the act of "sewing" using a serger. Overlocking or Overlock refers to a 4 thread serge stitch. Flatlock is a technique in which two pieces of fabric are serged together and then pulled apart slightly to achieve a flat stitch which connects the two pieces of fabric. Coverstitch is the stitch that you see on ready to wear garments at hem lines.
For a complete demonstration on serger techniques visit a Janome dealer near you. They would be more than happy to show you the wonders of a serger.