JUKI MEB-3200 Engineer's Manual page 29

Adjustment Procedures
™ S/R types (long thread trimming)
1. The clearance between needle thread trimming knife J 2 and
the needle is approximately 1 mm.
Loosen setscrew 1 and move needle thread trimming knife J
2 to adjust the clearance.
2. Loosen nut 8, move needle thread trimming knife adjusting
base 9 up and down, and adjust clearance "B" between the
needle thread trimming knife J and spreader, right 7 to 0.1 to
0.2 mm to obtain the height of needle thread trimming knife J
2.
(Caution) When needle thread trimming knife J 2 comes in
contact with spreader, right 7, breakage of components
will be caused.
3. The initial position of needle thread trimming knife J 2 is the
position where it protrudes 3.2 mm from throat plate 4. Loosen
adjustment nut !1 and adjust the initial position with adjustment
screw !2 .
4. Adjust the operating position of needle thread trimming knife J
2 within the range where needle thread trimming knife J 2
comes out by 1.2 to 1.5 mm from throat plate 4 when needle
thread trimming actuating arm !0 is moved counterclockwise
and stopper B !3 of the needle thread trimming knife actuating
arm comes in contact with the top surface of the looper bracket.
(Caution) 1. Stopper B !3 of the needle thread trimming
actuating arm is a double thread screw.
2. When the right blade type knife, 14050009 is
used, refer to the item ™ Adjusting the right
blade type (32023319) of "(13) Installing position
of the needle thread trimming knife".
™ T type (short thread trimming without gimp)
Perform the adjustment of aforementioned steps 1. through 4.
with left looper (eye looper) !4 .
(Caution) When the clearance between the top end of needle
thread trimming knife J 2 and needle (end of left looper
!4 ) is smaller than 1 mm, even looper thread is cut and
looper thread holding cannot be performed. When such
phenomenon as this occurs, adjust the clearance of 1 mm
to rather larger than 1 mm.
Results of Improper Adjustment
25
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