JUKI MEB-3200 Engineer's Manual page 33

Adjustment Procedures
™ S type and R type (Long thread trimming) : Right blade type
™ Clearance between the top end of needle thread trimming knife
2 and the needle is 0.6 to 0.75 mm.
1. Loosen setscrew 1 in the needle thread trimming knife and
move needle thread trimming knife 2 in the oblique direction
to adjust the clearance.
For reference of adjustment, adjust the position of the needle
thread trimming knife 2 to the position where it overlaps by
approximately 2/3 as against the width of the top end of right-
hand looper 3.
1) Clearance between the bottom face of needle thread
trimming knife 2 and the top surface of right-hand spreader
!0 is 0.1 to 0.15 mm.
2. Loosen nut 4 of the needle thread trimming knife adjusting
base and adjust needle thread trimming knife adjusting base
5 in the vertical direction.
3. Origin position of the needle thread trimming knife
For reference, the origin position is the position where the left-
hand side of the needle thread trimming knife 2 is almost
aligned with the right-hand side of the throat plate 9.
Loosen lock nut 6 and adjust the position with needle thread
trimming knife actuating plate stopper A 7.
4. Maximum operating range of the needle thread trimming knife
1) Move right-hand looper 3 to the leftmost position.
2) In the state that the needle thread trimming knife 2 is
pressed to the leftmost position, adjust so that the top end
of of the needle thread trimming knife 2 is aligned with the
line on the corner of right-hand looper 3 with needle thread
trimming knife actuating arm stopper B 8.
3) Needle thread trimming knife actuating arm stopper B 8
consists of double screws. Remove the upper screw and
turn the lower screw to adjust. After completion of the
adjustment, attach the upper screw and fix the stopper B.
Results of Improper Adjustment
29
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