IMPORTANT: Match needle size to thread size and weight of fabric.
A. Upper thread tension
Basic upper thread tension setting: "AUTO" To increase the tension, turn the dial to the next higher number. To reduce the tension, turn the dial to the next lower number.
Note: The upper thread tension must be set at 2-3 when sewing the lightweight fabrics, like silk and jersey etc.
B. Lower thread tension
Note: The bobbin tension is adjusted correctly during manufacturing, therefore no changes are necessary.
To test the bobbin thread tension, the full bobbin is placed in the bobbin case. The bobbin case and gripper are then suspended by the end of the thread. If the tension is correct, the thread will unwind by about 1.97 to 3.94 inch. when gently swung and will then remain suspended. If the full bobbin case unwinds, the tension is too slack. If the tension is too tight, it hardly unwinds or does not unwind at all. To adjust, use the screwdriver.
Use a backing for fine or stretchy fabrics.