19
20
21
0.3mm
87.5mm
10
①
②
①
②
螺母A
4.6mm
0.5mm
电磁铁安装架螺钉
电磁铁连接件固定螺钉
②
③
Knife edge
Spring
Left crank
Right crank
Bush
2.The relation between fixed knife and movable knife
(Fig. 19)
(1)The clearance between fixed knife ① and movable
knife ② should be 0.3mm
(2)Adjust the position illustrated by the Fig. 19,move
the bobbin case opener and adjust the holder of
fixed knife.
3.Thread trimmer cam lever shaft(Fig. 20)
(1)Install the shaft ① on the machine bed first;
(2)Install the cam lever L on the shaft ① as illustrated;
(3)Slightly turn the shaft ①, and install the positioning
block ② as illustrated.
4.Installing the trimming solenoid (Fig. 21)
(1)The stoke of solenoid
a. The standard stroke is 4.6mm
b. Turn the nut (A) to adjust the stroke
(2)Adjusting the solenoid
a.When the solenoid is active, there should be a 0.5mm
clearance between the cam lever L ③ and cam lever R
②. If need to adjust, please move the solenoid base
shown by the arrow.
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