130
A
B
1
25
4
3
3
If the initial position of the moving knife is not
correct
Loosen the nut 3 , and move the moving knife to the
right or left until the pin 1 meets the marker dot 2 .
Then, tighten the nut 3 .
(2) Adjusting the thread trimming timing
Put roller 4 in the cam groove. Now, gradually turn
the handwheel in the reverse direction. The handwheel
will go no further when marker dot 1 engraved on the
handwheel cover is aligned with red marker dot 2
engraved on the handwheel.
To adjust the thread trimmer cam, align the red marker
dot on the handwheel cover with the red marker dot
on the handwheel, put the roller in the groove of the
thread trimming cam, and gradually turn the handwheel
in the direction opposite to the direction of rotation of
the hook driving shaft until it will go no further. Now,
tighten two screws 5.
8-12. Adjusting the needle thread feeding device
WARNING :
To protect against possible personal injury due to abrupt start of the machine, be sure to start the
following work after turning the power off and ascertaining that the motor is at rest.
8 to 12 mm
0.5 to 1
mm
(A ≒ B)
Cau
tion
■
Standard position of the feeding wire
1) Loosen screw 1.
2) Turn the feeding wire together with feeding wire installing
base 2, adjust the installing position of the feeding wire
so that a distance of C (8 to 12 mm) is provided between
the top end of feeding wire 3 and the guide portion of
thread take-up thread guide A 4, and tighten screw 1.
At this time, leave a space of 0.5 to 1
mm between the feeding wire and the
top surface of the thread take-up thread
guide A.
3) Finely adjust with setscrews 5 so that the top end of
the feeding wire is placed approximately in the center
(A ≒ B) of the thread take-up thread guide A.
■
When turning OFF the feeding device :
It is possible to turn OFF with the function setting
No. 89 described in the function setting list.
■ When needle thread feeding amount is desired to
be increased :
• Loosen setscrew 1 and adjust the relation between
A and B to A > B.
• Loosen setscrew 1 and when the whole feeding
wire installing base 2 is adjusted to the upward
direction (decrease the value, C), the feeding amount
can be increased.
3
4
5
C
1
2
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