SWF MA-6, Руководство пользователя, Страница: 35 / 76

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– When using special threads, such as artificial
silk, you might want to turn the groove of the
needle to the right in order to minimize the
thread breaks.
8.2.4) Relationship between needle and hook
– Adjusting timing between needle and hook
Default timing of the needle and the hook is set by the main shaft angle of 201
°
. Relationship between the
needle and the hook varies as below.
Top edge of the
needle hole
Top point of hook
circumference
a
Hook point
Top edge of the
needle hole
Needle tip
Lower dead stop
of the needle bar
Hook point
b
c
a. At lower dead stop of the needle bar 2.3~3.7 mm
b. At needle-hook timing 1.8~2.2 mm
c. At needle-hook timing 0.5~1.5 mm
If the needle is not inserted all the way to the top of the needle bar hole, timing of the machine
will go off, causing broken needles and thread breaks.
CAUTION