35
C. Fixing Screw and Lower Thread Holder
When the fixed blade
①
is half entered into the
moving blade, trimming is conducted safely at the
lowest possible pressure. At the time of trimming,
the lower thread holder
③
contacts the moving blade
②
stably holding the lower thread. Adjustment can
be conducted as follows.
ⓐ
Loosen the tightening screw
④
, and place the
hook base
⑦
and the fixing blade base
⑧
closely.
Fasten the tightening screw
④
at the hole center.
Loosen the fixing screw and adjust the distance
between the slide plate guide
⑤
and the fixing
blade tip
①
at some 28mm. After that, tightly
fasten the fixing screw.
ⓑ
Loosen the fixing screws
⑥
for the lower thread
holder and properly adjust the lower thread
holder
③
to make sure that it does not pull the
thread neither too strong nor too week. Then
tightly fasten the fixing screws
⑥
.
[Fig. 42]
D. Adjustment of Trimmer Cam and Lever
The location of the trimmer cam
①
is determined by
the movement of the moving blade
②
. Upon
trimming, the trimming lever roller
③
contacts the
lowest curved line of the trimmer cam. However,
during sewing, the trimmer lever roller
③
and the
trimmer cam
①
do not contact each other. To make it
sure, adjustment can be conducted as follows.
ⓐ
Loosen three trimmer cam fixing screws
④
and
the trimmer lever tightening screw
⑨
.
ⓑ
While the thread take-up lever is located at the
highest point, adjust the cam to place the center
of the opener shaft
⑤
, the center of the trimmer
cam setting hole
⑥
and the center of the trimmer
lever roller
③
at the same line A as in the figure.
ⓒ
Tightly fasten three fixing screws
④
and the
trimmer lever tightening screw
⑨
.
ⓓ
Loosen the trimmer clamp fixing screw
⑦
ⓔ
Adjust the trimmer cylinder shaft
⑧
to make the
moving blade
②
contact the fixed blade
⑩
for
trimming when the trimmer cylinder stroke is
maximum.
ⓕ
Tightly fasten the fixing screw
⑦
.
[Fig. 43]
③
A
0.1mm
⑥
④
⑤
⑥
⑨
①
⑦
⑧
②
⑩
⑤
①
28mm
③
⑥
④
②
⑧
⑦