JUKI MOL-254 Engineer's Manual page 33

Adjustment Procedures
Adjust the height of the moving knife according to the
thickness of washer. If proper adjustment of the moving knife
cannot be obtained, select and use one of the following parts.
Part No.
B242328000A
B242328000B
B242328000C
B242328000D
B242328000E
B242328000F
B242328000G
1) If the difference in height between the needle hole guide
and the blade of the counter knife has not been adjusted
to a value within the range of 0.3 to 0.4 mm, adjust it by
prizing off portion
like. (At this time, check the parallelism between the blade
and the throat plate installing plane.)
2) If the thread is not cut on
appropriately. If the thread is not cut on
side appropriately.
3) If the thread is not cut even after carrying out the
adjustment steps 1) and 2), replace the moving knife or
the counter knife with a new one.
Name of part Thickness
Washer 0.4 mm
Washer 0.5 mm
Washer 0.6 mm
Washer 0.7 mm
Washer 0.8 mm
Washer 0.65 mm
Washer 0.75 mm
(Fig. 8-2) with a screwdriver or the
side, shave
side, shave
To an acute angle
Fig. 9-2
26
−
Results of Improper Adjustment
Thread trimming failure will occur.
○ If side
the thread will not be cut on
side.
○ If the side
, the thread will not be cut on
side
side.
−
is lower than side ,
is lower than side