Thread Tension; Thread Take-Up Spring; Adjusting The Thread Take-Up Stroke - JUKI DDL-8700 Instruction Manual

15. tHrEaD tENSIoN

1
B

16. tHrEaD taKE-uP SPrING

A
B
3

17. aDJuStING tHE tHrEaD taKE-uP StroKE

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.
A
C D
2
A
4
5
1
2
1
B
1
C
(1) adjusting the needle thread tension
) As you turn thread tenson nut 1 clockwse (n
drecton A ), the needle thread tenson wll be n-
creased.
2) As you turn nut 1 counterclockwse (n drecton
B ), the needle thread tenson wll be decreased.
(2) adjusting the bobbin thread tension
) As you turn tenson adjust screw 2 clockwse (n
drecton C ), the bobbn thread tenson wll be n-
creased.
2) As you turn screw 2 counterclockwse (n drec-
ton D ), the bobbn thread tenson wll be de-
creased.
(1) changing the stroke of thread take-
up spring 1
) Loosen setscrew 2 .
2) As you turn tenson post 3 clockwse (n drecton
A ), the stroke of the thread take-up spring will be
ncreased.
3) As you turn the knob counterclockwse (n drec-
ton B ), the stroke wll be decreased.
(2) changing the pressure of thread take-
up spring 1
) Loosen setscrew 2 , and remove tenson post 3 .
2) Loosen setscrew 4 .
3) As you turn tenson post 3 clockwse (n drecton
A ), the pressure wll be ncreased.
4) As you turn the tension post counterclockwise (in
drecton B ), the pressure wll be decreased.
1) When sewing heavy-weight materials, move thread
gude 1 to the left (n drecton A ) to ncrease the
length of thread pulled out by the thread take-up.
2) When sewing light-weight materials, move thread
gude 1 to the rght (n drecton B ) to decrease the
length of thread pulled out by the thread take-up.
3) Normally, thread gude 1 s postoned n a way
that marker lne C s algned wth the center of
the screw.
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