SunStar KM-1640BL-7, Руководство пользователя

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6.2.1) Adjusting upper thread
A. Thread control assembly
Like in Figure 6-2, turning the tension adjustment
nut
①
of the thread tension control assembly
clockwise makes the upper thread tension stronger
and counterclockwise makes it weaker. 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.
B. Adjusting the thread take up tension
As in Figure 6-2, 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.
[Fig. 6-2]
6.2.2)
The tension of the lower thread becomes larger
when you turn clockwise the tension adjustment
screw
①
and becomes smaller when you turn in
counterclockwise. When hold the end of thread,
make sure that the bobbin case
②
should drop
by gravity in order to adjust the lower thread
tension.
[Fig. 6-3]
①
②
④
①
②