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1. Adjust the position of the bobbin winder driving wheel and fix it
with two set screws .
Adjustment Procedures
Results of Improper Adjustment
o If the distance of 10mm is
insufficient, rubber ring wear may
occur in the bobbin winder unit.
In addition, the bearing life may
be reduced in the bobbin winder
unit.
o If the distance of 10mm is exces-
sive, normal thread winding may
fail. In addition, this will also cause
rubber ring slippage in the bob-
bin winder unit and give rise to
wear.
1. Loosen the set screw of the bobbin winder lever and adjust the
distance to 14mm between the bobbin winder lever and the bob-
bin winder shaft . After that, tighten the set screw of the bobbin
winder lever.
2. Start the sewing machine and wind the thread at the bobbin winder.
Confirm the amount of winding.
1) If the amount of winding seems to be too much, adjust the bobbin
winder lever in the direction of the arrow
A
.
2) If the amount of winding seems to be too less, adjust the bobbin
winder lever in the direction of the arrow
B
.
3. If the winding state of the thread around the bobbin winder
seems to be uneven, loosen the nut and adjust the height of the
thread tension control .
(Example) If the amount of the wound thread is less on the upper
side of the bobbin winder as illustrated, adjust the
thread tension control upwards.
Adjustment Procedures
Results of Improper Adjustment
o If too much thread is wound
(thread protruded from the bobbin
), the thread will come in
contact with the inside of the
bobbin case and this can be a
cause of sewing deficiency.
o If the amount of thread winding is
uneven at top and bottom of the
bobbin winder , stitch perfora-
tion may become irregular.
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