17
6) Winding and adjusting lower thread
Winding lower thread
a) Pass the thread thru the hole① from the rear to the
frontal side of the tension adjusting dish②.
b) Bring the thread to the bobbin③ and wind it
clockwise 5 to 6 times from the bottom.
c) Push the lever④ so that the pulley⑤ touches the V-
belt and run the machine.
d) The pulley⑤ automatically is separated from the V-
belt when the lower thread is winded in the bobbin.
e) The adequate amount of the pulled-out lower thread
is about 80%. (Refer to Figure 24)
[Figure 24]
Adjustment of winding lower thread
a)
In case that the lower thread is winded irregular, loosen the bolt⑥ and adjust by moving it sideways, and tight it again.
b) The amount of winded lower thread becomes larger when you turn adjusting screw⑦ clockwise, and it becomes
smaller in case of turning it counterclockwise.
c) The tension of lower thread that winded in the bobbin can be adjusted by turning the nut⑧: it increases with
clockwise turning and it decreases when you turn counterclockwise.
[Figure 25]
7) Inserting and removing lower thread and adjusting tension
Insert the bobbin into the bobbin case. Later, insert the thread into the thread groove③ and place it under the spring④ of
thread adjusting plate. The tension of the lower thread becomes larger when you turn clockwise the tension adjustment
screw⑤ and becomes smaller when you turn in counterclockwise. When hold the end of thread, make sure that the
bobbin case⑥ should drop by gravity in order to adjust the lower thread tension.
Inserting and removing the bobbin case
Insert into the hook by grabbing the bobbin case handle①. Pull out the handle① when you remove the bobbin. (The
bobbin② removes itself when you release the handle.)
Weaker
Stronger
Caution
▶ Turn off the power when adjusting the lower thread tension.
▶ If the operator mistakenly steps down on the pedal while switched on, the machine will start
automatically and can cause physical injuries.
▶ When using the clutch motor, be aware that the motor will continue to rotate for a while after
the power is switched off. Start to work only after the motor has come to a complete stop.
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