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

4-13. 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.
(1) When you want to change the stroke of the thread take-up spring
4
6
) Stroke of thread take-up sprng 1 on the rght s adjustable by movng thread tenson No. 2 asm.
3 to the left or rght after loosenng thread tenson No. 2 setscrew 2 .
2) Stroke of thread take-up sprng 4 on the left s adjustable by movng thread tenson No. 2 asm. 6
to the left or rght after loosenng thread tenson No. 2 setscrew 5 .
3) Move thread tenson No. 2 asm. 3 and 6 to the rght to ncrease or to the left to decrease the
stroke of the thread take-up sprng.
When adjusting the stroke of thread take-up springs 1 and 4 , thread release pins 7 and 8 should
not come in contact with disk release plate 9 .
In addition, for LH-3528, 3528-7, 3578 and 3578-7, make sure that thread tension disks !1 and !2
securely rise when hand lifter lever !0 is turned in the direction of the arrow.
(2) When you want to change the tension of the thread take-up spring
4
!4
7
5
9
1
2
3
1
!3
!1
8 !2
) Tenson of thread take-up sprng 1 on the
rght s adjustable by turnng sprng stud !3 to
the rght to ncrease or to the left to reduce.
2) Tenson of thread take-up sprng 4 on the left
s adjustable by turnng sprng stud !4 to the
rght to ncrease or to the left to reduce.
– 20 –
!0
To turn