Sewing machine is a type of knitting machine widely utilized at home. Sewing machine has simple structure, convenience and low price. People can use sewing machine to knit various fabrics instead of circular knitting machine for high price. However, loose stitches could be caused when the machine used for a long time.
Tension mechanism on machine causes loose stitches. On older sewing machine, it is circular and has a numbered dial. On newly machine, jt may just appear as a slot with a dial someplace with number 0-9 on it. In either case, the thread must go between two metal disks, which are the tension elements.