Thread Tension; Theead Take�Up Spring; Adjusting The Thread Take�Up Stroke - JUKI DLN-6390 Manuel D'utilisation

6. Thread tension
1
B
A
2
C
D
7. Theead take�up spring
1
A
B
3
8. 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 B
(1) Adjusting the needle thread tension
＊ ) and 2) are for DLN-6390-7 only.
) As you turn thread tenson No.  nut 1 clockwse (n
2) As you turn nut 1 counterclockwse (n drecton B ),
E
F
＊ Adjust so that the length of the thread remanng on the
3
3) As you turn thread tenson nut 2 clockwse (n drecton
4) As you turn nut 2 counterclockwse (n drecton D ),
45 to 50 mm
(2) Adjusting the bobbin thread tension
) As you turn tenson adjust screw 3 clockwse (n drecton
2) As you turn screw 3 counterclockwse (n drecton F ),
＊ Commendable value of bobbn thread tenson s 0.2N.
(1) Changing the stroke of thread take�up spring 1
) Loosen setscrew 2 .
2) As you turn tenson post 3 clockwse (n drecton
5 4
3) As you turn the knob counterclockwse (n drecton B ),
(2) Changing the pressure of thread take�up spring 1
) Loosen setscrew 2 , and remove thread tenson (asm.) 5 .
2
1
2) Loosen setscrew 4 .
3) As you turn tenson post 3 clockwse (n drecton A ),
4) As you turn the tenson post 3 counterclockwse (n
) When sewng heavy-weght materals, move thread
1
2) When sewng lght-weght materals, move thread gude
C
3) Normally, thread gude 1 s postoned n a way that
drecton A ), the thread remanng on the needle after
thread trmmng wll be shorter.
the thread length wll be longer.
needle should be 45 to 50 mm wthn the range where
the thread between the thread tenson No.  1 and the
thread tenson 2 does not move volently.
C ), the needle thread tenson wll be ncreased.
the needle thread tenson wll be decreased.
E ), the bobbn thread tenson wll be ncreased.
the bobbn thread tenson wll be decreased.
A ), the stroke of the thread take-up sprng wll be
ncreased.
the stroke wll be decreased.
the pressure wll be ncreased.
drecton B ), the pressure wll be decreased.
gude 1 to the left (n drecton A ) to ncrease the
length of thread pulled out by the thread take-up.
1 to the rght (n drecton B ) to decrease the length of
thread pulled out by the thread take-up.
marker lne C s algned wth the center of the screw.
25