18
Caution
▶
Turn off the power when adjusting the lower thread tension.
If the operator mistakenly steps on the pedal, 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 only after the motor has come to a complete stop.
6) Inserting lower thread and adjusting thread tension
A. Put the bobbin
into the bobbin case . And insert the thread into the thread groove
and then wind it from the back to the
front of the tension adjusting plate spring . Turning the tension adjustment nut
of the hook clockwise makes the lower
thread tension stronger and counterclockwise makes it weaker. When hold the end of thread, make sure that the bobbin case
should drop by gravity in order to adjust the lower thread tension. ( See Figure 23)
B. Removing bobbin case
With hand of the bobbin case , insert the bobbin case in to hook. Pull the hand
to remove the case. (the bobbin
is removed
when the hand is off) ( See Figure 23)
[Figure 23]
Weak
Strong
