20
d) After adjustments, operate the trimming cam ① to
see if the front side of the assembly gear ② is
0.5mm from the front side of the first gear of the
trimming cam. (Refer to Figure 28)
[ Figure 28 ]
0.5mm
1mm
Trimming drive gear
“B”
e)
When the trimming cam ① is not in operation, also
check if the two gears ② are 1mm apart from each
other as shown in Figure. (Refer to Figure 29)
[ Figure 29 ]
[ Figure 31 ]
C. Adjusting the operating amount of the movable blade
a) When the needle begins to rise from its lowest
point by turning the pulley forward, press the
solenoid shaft ①. With the shaft pressed in, turn
the pulley to bring the trimming drive gear “B”②
against the trimming cam gear ③. When two
points ④ on the trimming cam come to align with
the carved point ⑤ of the lower shaft middle
bushing as shown in Figure, stop the rotation of the
pulley immediately. (The trimming lever screw
should be unfastened, as shown in Figure 31)
b) At this point, press down the connecting link ① in
Figure 31. When the cutting edge ② on the hill of
the movable blade goes 1~1.5mm farther than the
fixed blade upper tip, fix the trimming lever screw
③. The stroke of the movable blade at this point
is equivalent to the stroke when trimming begins.
[ Figure 30 ]
1~1.5mm
Movable blade
Fixed blade
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