Brother International LK3-B430 Service Manual - Page 24

Needle, shuttle, clearance, adjustment, Lower, shaft, backlash, Reference, Position

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4. Needle and shuttle hook clearance adjustment O. 01-0. 08mm - 0 -Turn the pulley to bring the top of the shuttle hook into line with the center of the needle. Then loosen screw() and turn the eccentric shaft Q so that the clearance between the needle and the top of the shuttle hook is 0.01 to 0.08 mm. 5. Lower shaft gear backlash adjustment 0 S 0 Loosen screw and turn rock gear shaft Q so that there appears to be a play of 0.04 to 0.07 mm at the top of the driver when it is moved in the rotating direction by hand. t2.1 FEED • Reference Needle Position Reference needle position varies with specifications. Adjust by referring to the table below. Specifications -1 -2 -3 -4 -5 -6 -7 -8 -9 Reference Needle Position 7 stitches 3 stitches 8 stitches 7 8 7 stitches stitches stitches - 24 -

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4.
Needle
and
shuttle
hook
clearance
adjustment
O.
01-0.
08mm
—
0
--
Turn
the
pulley
to
bring
the
top
of
the
shuttle
hook
into
line
with
the
center
of
the
needle.
Then
loosen
screw()
and
turn
the
eccentric
shaft
Q
so
that
the
clearance
between
the
needle
and
the
top
of
the
shuttle
hook
is
0.01
to
0.08
mm.
5.
Lower
shaft
gear
backlash
adjustment
0
S
Loosen
screw
and
turn
rock
gear
shaft
Q
so
that
there
appears
to
be
a
play
of
0.04
to
0.07
mm
at
the
top
of
the
driver
when
it
is
moved
in
the
rotating
direction
by
hand.
t
2.1
FEED
•
Reference
Needle
Position
Reference
needle
position
varies
with
specifications.
Adjust
by
referring
to
the
table
below.
Specifications
—1
—2
—3
—4
—5
-6
-7
-8
-9
Reference
Needle
Position
7
stitches
3
stitches
8
stitches
7
stitches
8
stitches
7
stitches
—
24
—