−
12
−
4
6
7
Adjustment Procedures
Results of Improper Adjustment
™
Loosen the looper base setscrew
4
and adjust by moving the
looper base back and forth.
™
If the clearance is too large, the
loop of the needle thread is not
scooped and the back of the
looper hits strongly the top point
of the needle which causes the
damage of the needle point.
™
If the clearance is too small,
skipping stitch will occur due to
the damage of the tip of the
looper, the needle breakage,
a n d t h e l a r g e c l e a r a n c e
between the back of the looper
and the needle.
™
Loosen the two screws
6
and adjust by rotating the eccentric
pin
7
.
™
Amount of the avoid increases in the direction of +.
™
Amount of the avoid reduces in the direction of –.
(Caution) After the adjustment, check again the clearance
between the blade point of the looper and the
groove of the needle. Then check the contact on
the back of the looper.
™
If the amount of the avoid is
large, the clearance of the back
of the looper and the needle
becomes large, and skipping
stitch and tangling stitch will
occur.
™
If the amount of the avoid is
small, the needle hits strongly
the back of the looper. This
causes the damage of the
n e e d l e p o i n t , t h e n e e d l e
breakage and the damage on
the back of the looper.
Old type
New type
6
7
From
the
library
of:
Diamond
Needle
Corp
