JUKI LU-2810 Series - Page 45

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Adjustment procedures Results of Improper adjustment
2) Position of the counter knife base
1. Loosen setscrews
1
of the counter knife base.
2. Move the counter knife base
1
to the position as shown in the
gure.
For the longitudinal position, press the edge of counter knife
base
2
against the step difference of the hook shaft base
4
.
For the lateral direction, adjust so that the distance from the
throat plate to the counter knife is 1.2 to 1.5 mm (C), then
tighten setscrews
1
of the counter knife base.
(Caution) When the counter knife base
2
is moved, re-adjust
the knife pressure.
3) Vertical position of the moving knife
1. Loosen clamping screw
6
of the moving knife driving arm.
2. Loosen setscrews
7
of the moving knife shaft thrust collar.
3. Adjust so that the clearance between the center part of bottom
end of moving knife
8
and inner hook
9
is 0.3 to 0.4 mm, then
tighten setscrews
7
of the moving knife shaft thrust collar.
4. Tighten clamping screw
6
of the moving knife driving arm so
that there is no thrust play at the moving knife shaft
!0
.
(Caution) Adjust the height of moving knife
8
at the center part
of moving knife
8
.
When dimension C is larger :
o
Knife pressure is increased. As a
result, motor stop will be caused.
o
Setting/taking out bobbin cannot
be performed.
o
Counter knife base interferes
with the rear end of moving
knife. As a result, moving knife
and counter knife
3
will be bro-
ken.
When dimension C is smaller :
o
Knife pressure is decreased. As
a result, thread trimming failure
occurs.
o
Moving knife interferes with the
hook stopping section. As a
result, thread trimming failure oc-
curs or moving knife is broken.
When the clearance is larger :
o
Clamp failure of needle thread
and bobbin thread occurs.
When the clearance is smaller :
o
Moving knife
8
interferes with
the inner hook
9
.
o
There is no clearance where
thread enters between moving
knife
8
and inner hook
9
. As
a result, thread trimming failure
will be caused.
海外講習会用121122LU-2810(-7)EM