19
[Fig. 18]
①
B. Adjusting the tension of the lower thread
The lower thread becomes tight when tension
adjusting screw ① is turned clockwise, as
shown in the picture. When the screw is
turned the other way the lower thread is
loosened.
[Fig. 19]
④
②
①
③
8) How to Wind the Lower Thread
A. Insert the bobbin into thread winding drive shaft ② on thread winding base ① which is installed
on the upper top.
B. Operate the machine after sticking the thread winding lever ③ to the bobbin.
C. When the thread winding lever is separated from the bobbin, cut the bobbin thread with thread
winding mes ④.
[Fig. 17]
7) How to Adjust the Tension of the
Upper Thread and the Lower Thread
A. Adjusting the tension of the upper thread
When the tension adjusting nuts ③ and ④, of
thread tension adjusting unit ① and sub-
tension adjusting unit ②, are turned clockwise
the upper thread is tightened. And loosens
when turned the other way around.
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