5-10
5-7) THREAD WINDER
1) Lower thread winding
①
Insert the bobbin into the thread winder shaft as in [Fig. 5-14]. Wind the bobbin 5-6 times by hand in the
thread winding direction. Then press the start button, and the thread winding begins.
②
If the thread winding status is poor, press the stop button. Then the winding stops immediately.
2) Adjustment of bobbin thread volume
①
When winding thread around the bobbin, the thread volume should be some 80% of the bobbin size in terms of
diameter as in [Fig. 5-15].
②
Bobbin thread volume is adjusted by the thread
winder knob. When the knob is turned clockwise,
the bobbin thread gets thicker. When the knob is
turned counter-clockwise, the bobbin thread gets
thinner.
[Fig.5-14]
min
TIMER
ST
AR
T
ST
OP
max
Knob
Tension adjusting holder
Tightening screw for the tension adjusting holder
Bobbin axis
Bobbin
Thread tension adjusting nut
[Fig.5-15]
[Fig.5-16]
80%
Decrease
Increase
Knob
[CAUTION]
1. If the bobbin thread volume is too high, the
lower thread is not properly released.
2. When the lower thread is wound by 80% of
the standard bobbin size, it means some 80m.
