Hikari H9199, Instruction Manual Book And Parts Book

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INSTRUCTION MANUAL
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9-8 Adjusting the needle and rotary timing
The tip of the rotary hook (3) should be aligned with the
center of the needle(4) when the needle bar(1) moves up from
its lowest position to the position where reference line(b),
which is the line at the bottom of the needle bar(1)(third line
from the bottom when using a DA×1 Needle),is aligned with
the lower edge of the needle bar D(2) as shown in the
illustration.
1. Turn the machine pulley to raise the needle bar(1) from its
lowest position until reference line(b) is aligned with the
lower edge of the needle bar bush D(2) as shown in the
illustration.
2. Loosen the set screw(5), and then align the tip of the rotary
hook(3) with the center of the needle(4).The distance between
the tip of the rotary hook(3) and the needle(4) should be
approximately 0-0.05mm.
3. Securely tighten the set screws(5).
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Checking the clearance between the rotary hook and
bobbin case holder position bracket
>
Check that the clearance between the rotary hook (6) and the
bobbin case holder position bracket(7) is enough to allow the
thread being used to pass through smoothly. The clearance
should be 0.4-0.7 mm for F/M model , and 0.6-1.1mm for H
models.
9-9 Thread trimmer mechanism
The control cam 3 determines the stroke and the timing of the knife motion. The timing thus coincides with the motion of
the needle. The thread trimmer is switched on electromagnetically.
1) Control cam for the knife motion
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Seen from above
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