19
Caution
▶
Turn off the power switch when routing the upper thread.
If the operator mistakenly steps 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 due to inertia.
Start to work on the sewing machine only after the motor has come to a complete stop.
7) Routing the upper thread
Place the thread take-up lever to the highest position and insert the upper thread in the order of marked number as can be seen in figure24.
[Figure 24]
8) Adjusting the upper thread
A. Thread adjustment
As can be seen in figure 25, turning the tension adjustment
nut
of the thread adjusting device clockwise makes the
lower thread tension stronger and counterclockwise makes it
weaker. Adjust the thread tension responding to the situation
because adjustment of the thread tension changes according
to sewing conditions such as the sewing material, used
thread and stitch length.
B. Adjusting the tension of the thread take up spring
As can be seen in figure 25, insert the driver into the groove
of the thread adjusting device . Turn clockwise to make
the spring tension stronger and counter clockwise to make it
weaker.
C. Auxiliary thread adjustment
As can be seen in figure 26, turning the thread tension
adjustment nut
clockwise makes the thread length after
trimming shorter and counterclockwise makes it longer. The
adequate length of upper thread after trimming is 30~40mm.
[Figure 25]
Good sewing
[Figure 26]
Weak
Strong
Upper thread tension is strong
Upper thread tension is weak
