Winding The Bobbin Thread - JUKI LH-4128 Instruction Manual

4-11. Winding the bobbin thread

1
2
4
C
B
3
A
1. When winding the bobbin thread, start the winding in the state that the thread
between the bobbin and thread tension disk 7 is tense.
2. When winding the bobbin thread in the state that sewing is not performed, remove the
needle thread from the thread path of thread take-up and remove the bobbin from the hook.
3. There is the possibility that the thread pulled out from the thread stand is
loosened due to the influence (direction) of the wind and may be entangled in the
handwheel. Be careful of the direction of the wind.
7
8
D
7
6
E
7
) Insert the bobbn deep nto the bobbn wnder
spndle 1 untl t wll go no further.
2) Pass the bobbn thread pulled out from the
thread tenson controller located on the rght
sde of the thread stand as shown n the
fgure and wnd clockwse the end of the
bobbn thread on the bobbn several tmes.
(In case of the alumnum bobbn, after wndng
clockwse the end of the bobbn thread, wnd
counterclockwse the thread comng from the
bobbn thread tenson several tmes to wnd
the bobbn thread wth ease.)
3) Press the bobbn wnder trp latch 2 n the
drecton of A and start the sewng machne.
The bobbn rotates n the drecton of C and
the bobbn thread s wound up. The bobbn
wnder spndle 1 automatcally as soon as
the winding is finished.
4) Remove the bobbn and cut the bobbn thread
wth the thread cut retaner 3 .
5) To adjust the wndng amount of the bobbn
thread, loosen setscrew 4 and move bobbn
wnder trp latch 2 to the drecton of A or B.
Then tghten setscrew 4 .
To the drecton of A : Decrease
To the drecton of B : Increase
6) In case that the bobbn thread s not wound
evenly on the bobbn, loosen the nut 6 and
turn the bobbn thread tenson to adjust the
heght of the thread tenson dsk 7 .
• It s the standard that the center of the bobbn s
as hgh as the center of the thread tenson dsk.
• Move the poston of the thread tenson
dsk 7 to the drecton of D as shown n the
fgure on the left when the wndng amount
of the bobbn thread on the lower part of the
bobbn s excessve and to the drecton of E
as shown n the fgure on the left when the
wndng amount of the bobbn thread on the
upper part of the bobbn s excessve.
After the adjustment, tghten the nut 6 .
7) To adjust the tenson of the bobbn wnder,
turn the thread tenson nut 8 .
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