17
6) Adjusting thread tension
The result of the needlework depends on the sewing conditions such as the sewing material, used thread and stitch length. So
please adjust as desired.
[Figure 22]
- good sewing
- upper thread tension is strong while the lower thread tension is weak
- upper thread tension is weak while the lower thread tension is weak.
⑴ Adjusting the upper thread tension
Like in Figure 23, turning the tension adjustment nut ①
of the thread tension control assembly clockwise makes
the upper thread tension stronger and counterclockwise
makes it weaker.
⑵ Adjusting the lower thread tension
Like in Figure 24, turning the tension adjustment nut ①
of the hook clockwise makes the lower thread tension
stronger and counterclockwise makes it weaker.
⑶ Adjusting the thread take up tension
Adjusting the thread take up stroke
As in Figure 25, loosen the stopper fastening screw ①, and turn the thread take up lever’s spring stopper ② clockwise
to make the stroke smaller and counter clockwise to make it bigger. The thread take up stroke is normally 5~10mm.
Adjusting the thread take up tension
As in Figure 26, loosen the screw ① of the thread tension control assembly, and insert the driver into the groove ② of
the thread tension control assembly. Turn clockwise to make the spring tension stronger and counter clockwise to
make it weaker. The thread take up spring tension is normally 50~80g.
[Figure 23]
[Figure 24]
[Figure 25]
[Figure 26]
Strong
Strong
Small
Big
Weak
Strong
Strong
Weak
Weak
①
①
Weak
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