22
14) Adjusting safety device
If the load occurs by foreign substances on thread, needle, etc, during the sewing operation, the driving ball ① of safety
assembly in Figure 34 is removed to prevent damage of the hook and other major parts from the lood, and the pulley ② and
the clutch plate ③ on the safety assembly are removed. Then, the driving force of timming belt on the upper shaft does not
delivered to the lower shaft, so only the pulley ② of safety assembly rotates idly. In case that the safety assembly starts
operating during the work, turn power switch off and remove causing factors of load. Later, with safety button ④ pressed,
turn the pulley to place the driving ball① of safety assembly to its original position.
※ Adjust the intensity of the safety assembly spring ⑤ by rotating safety assembly adjustment screws ⑥ from side to side
in accordance with working conditions. (Turning the screw to left makes the intensity stronger, and right to make it
weaker. Make sure to give same pressure on the three screws.)
[Figure 34]
15) Adjusting the trimming device
(1) Adjustment of Initial Position of Moving Blade
Loosen the tightening screws ①,② for trimmer crank, and set the slant end of the moving blade③ to protrude 0~0.5mm
from the fixed blade④. Then fasten the tightening screws①,② for trimmer crank.
[Figure 35]
①
③
⑤
⑥
②
⑥
④
①
②
③
④
0~0.5mm
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