Upper Tension Control Dial

This dial controls the tension of the upper thread. The tension of the thread will affect the quality of the stitches.

If the upper tension is too tight, loops will appear on the surface of the fabric therefore the tension is reduced by turning the upper tension-control dial to a lower number.

If the upper tension is too loose loops will appear on the back of the fabric therefore the tension is increased by turning the upper tension-control dial to a higher number.