Winding The Bobbin Thread - JUKI LH-3500A Series Instruction Manual

4-14. Winding the bobbin thread

❸
B
❶
A
❷
C
❹
❻
❼
D
❻
❺
E
❻
the bobbin thread on the lower part of the bobbin is excessive
and to the direction E when the winding amount of the bobbin
thread on the upper part of the bobbin is excessive.
After the adjustment, tighten nut ❺ .
7) To adjust the tension of the bobbin winder, turn the thread ten-
sion nut ❼ .
F
1) Insert the bobbin deep into the bobbin winder
spindle ❶ until it will go no further.
2) Pass the bobbin thread pulled out from the spool
rested on the right side of the thread stand follow-
ing the order as shown in the figure on the left.
Then, wind clockwise the end of the bobbin thread
on the bobbin several times. (In case of the alumi-
num bobbin, after winding clockwise the end of the
bobbin thread, wind counterclockwise the thread
coming from the bobbin thread tension several
times to wind the bobbin thread with ease.)
3) Press the bobbin winder trip latch ❷ in the di-
rection of A and start the sewing machine. The
bobbin rotates in the direction of C and the bobbin
thread is wound up. The bobbin winder spindle ❶
automatically as soon as the winding is finished.
4) Remove the bobbin and cut the bobbin thread
with the thread cut retainer ❸ .
5) When adjusting the winding amount of the bob-
bin thread, loosen setscrew ❹ and move bobbin
winding lever ❷ to the direction of A or B. Then
tighten setscrew ❹ .
To the direction of A : Decrease
To the direction of B : Increase
6) When the bobbin is not evenly wound with
thread, loosen nut ❺ and adjust the height of
bobbin winder tension disk ❻ .
• It is the standard that the center of the bobbin is as
high as the center of thread tension disk ❻ .
• Adjust the position of thread tension disk ❻ to
the direction of D when the winding amount of
1. When winding the bobbin thread, start the winding
in the state that the thread between the bobbin and
thread tension disk ❻ is tense.
2. When winding the bobbin thread in the state that sew-
ing is not performed, remove the needle thread from
the thread path of thread take-up and remove the bob-
bin 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.
4. Slackened part of the thread can get tangled on
the pulley. It is recommended, in order to avoid the
above-stated trouble, to wind the bobbin on the F side
which is located far from the motor.
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