– 25 –
❶
❹
❷
❸
❻
❺
4-15. Thread take-up spring
and
❾
securely rise when hand lifter lever
❼
is turned in the direction of the arrow.
(2) When you want to change the tension of
the thread take-up spring
1) To change the tension of thread take-up spring
❹
on the left side, loosen nut
❷
and turn spring
stud
❸
clockwise to increase or counterclock-
wise to decrease the tension of the spring.
After the adjustment, x the stud by tightening
nut
❷
.
2) To change the tension of thread take-up spring
❶
on the right side, loosen screw
❺
and turn nut
❻
clockwise to increase or counterclockwise to
decrease the tension of the spring.
After the adjustment, x nut by tightening screw
❺
.
1) For thread take-up spring
❸
on the left side, loosen screw
❷
and adjust the stroke of the spring by mov-
ing the screw along the slot for adjustment.
2) For thread take-up spring
❶
on the right side, loosen screw
❹
and adjust the stroke of the spring by
moving thread take-up spring adjusting plate
❺
along thread take-up spring base
❻
.
In addition, for LH-3528A, 3528A-7, 3578A and 3578A-7, make sure that thread tension disks
❽
(1) When you want to change the stroke of the thread take-up spring
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 o and ascertaining that the motor is at rest.
❹ ❷
❺
❶
❸
❻
❽❾
❼
[S type and G type]
Decrease Increase
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