15
5) Adjusting the thread tension
(1) Adjusting the thread tension
As in Figure 14, turning clockwise the tension
adjustment nut ① of the thread tension control
assembly makes the upper thread tension stronger and
counter clockwise makes it weaker.
(2) Adjusting the lower thread tension
As in Figure 15, turning the tension adjustment screw
① of the hook clockwise makes the lower thread
tension stronger and counterclockwise makes it weaker.
[Figure 14]
[Figure 15]
(3) Adjusting the tension of thread take up lever spring
A) Adjusting the thread take up stroke
As in figure 16, loosen the stopper clamp screw ③, and turn the thread take up lever’s spring stopper ① clockwise to
make the stroke smaller and counter clockwise to make it bigger.
※ The thread take up stroke is normally 10~14 mm.
[Figure 16]
Upper thread tension is weak
Upper thread tension is strong
Good sewing
①
①
Smaller
②
②
③
Bigger
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