−
11
−
1) Loosen setscrew
3
and adjust, by slightly turning needle clamp
4
, the clearance provided between the right-hand side needle
and the lower looper (for 2-needle overlock machine) and the
clearance provided between the needle hole in the throat plate
and the needle (for safety stitch machine).
™
I f t h e c l e a r a n c e p r o v i d e d
between the needle and the
looper is excessive, the needle
thread will be likely to skip at the
time of tucking.
™
I f t h e c l e a r a n c e p r o v i d e d
between the needle and the
looper is insufficient, the needle
will break or the looper blade
point will be damaged causing
thread breakage.
Adjustment Procedures
Results of Improper Adjustment
1) Loosen setscrew
1
of the lower looper holder from the rear of
the frame.
Since it is difficult to accurately measure the center-to-center
distance, perform adjustment to provide a 3.5 mm distance
between the end surface of the arm and the neck of the ball as
illustrated.
™
Increasing the center-to-center
distance will give a smaller
stroke of the duble chain looper
or lower looper, and decreasing
the distance will give larger
stroke.
Summary of Contents for MO-6000S series
Page 78: ......
