3.
ADJUSTMENT
3-1)
Adjusting
Thread Tension
3-1)
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Check a sample seam to see the tightness
of
thread. For too
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tight needle thread, loosen thread tension, upper
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1
Tighten
it
if the needle thread is loose and raised too high. To
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3-2)
Setting
Needle
and
Adjusting Needle Bar Height
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(1) Insert a new needle in needle bar (172132)asfar as
it
will
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(172141)a
go (Figure
3).
Secure the needle in position with screw
(15164S28001)on needle stopper (172141).Look out tbr
the direction of needle. Theshaved part
of
the needle must
face toward the pulley of the machine.
-
(2)To adjust needle bar height, turn pulley until needle
1s
in
the lowest
position.
Thereare two mark lineson the needle
bar. Al~gnthe upper mark line with the bottom
of
needle
bar bush, upper (172151), as shown in Figure
4.
3-3)
Timing
Shuttle
Race
Body and
Needle
Turn pulley toward you (counterclockwise asyou face
it)
until
needle is in the lowest position.
(Be
sure that the upper mark
lineon the needle bar is aligned with the bottom of needle bar
bush, upper). Turn pulley further until the lower mark line on
the needle bar (see Figure
4)
is aligned with the bottom of
needle bar bush, upper: At this moment, the shut~lerace body
must
be
soadjusted that the point of the shuttleis
on
the left
sideof needle (Figure
5).
After adjustment, secure the shuttle
race holderwith three screws(114S40006). Thesescrews must
be
sotightened that the clearance between the shaved part of
needle and shuttle point
is
0.1 to0.2mm (detail
A,
Figure
5).
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