− 22 −
(7)-1. Initial position of the moving knife drive arm and the moving knife
) Tilt the sewing machine. Manually actuate the
solenoid valve when the thread trimming cam
roller does not fit in the cam groove to put the
thread trimming cylinder into the state where it
retracts.
(Press the manual switch of solenoid valve
No. 4 to lock the solenoid valve. Refer to
Explanation of the solenoid valve"
2) Loosen setscrew
1
for the leaf spring (asm.) to
remove leaf spring (asm.)
2
.
3) Loosen moving knife return plate setscrews
3
and remove moving knife return plate
4
.
4) Loosen moving knife drive arm stopper nut
5
and
loosen moving knife drive arm stopper screw
6
.
5) Loosen moving knife drive arm clamping screw
7
.
6) Adjust the clearance between the thread trimming
cam roller and the periphery of thread trimming
cam to 0.05 to 0.5 mm, and adjust moving knife
8
to the initial position.
The initial position of moving knife is the position
where the distance between the top end of
moving knife and the machine bed is 26.8 ± 0.
mm.
(At this time, the gauge for adjustment supplied
as accessories can be used.)
7) Keeping the state of 6), tighten moving knife drive
arm clamping screw
7
.
(Tightening torque : 5.9 to 6.9 N•m)
At this time, for the vertical direction of moving
knife drive arm, both ends of the bottom surface
of moving knife drive arm and the lower end of
moving knife shaft align with each other.
To be continued to "(7)-2. Mounting position of the
moving knife returning plate"
26.8 ± 0.1 mm
8
Top surface of machine bed
Groove section of slide plate
Gauge for adjustment supplied as accessories
37.8 mm
26.8 mm
29 mm
Thickness : 0.6 mm
43 mm
1
2
4
3
5
26.8 ± 0.1 mm
8
6
7
Clearance provided between the periphery of
thread trimming cam and the thread trimming cam
roller is 0.05 to 0.15 mm.
