Thread Take-Up Spring - JUKI LH-3500A Series Instruction Manual

4-15. 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 off and ascertaining that the motor is at rest.
[S type and G type]
(1) When you want to change the stroke of the thread take-up spring
❹
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
and ❾ securely rise when hand lifter lever ❼ is turned in the direction of the arrow.
❺
❶
❹
Decrease
❸
❷
❻
❸
❷
Increase
❶
❺
❻
❾ ❽
(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, fix 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, fix nut by tightening screw
❺ .
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❼