Brother International LK3-B430 Service Manual - Page 25

specifications

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1. Tack width adjustment Turn the pulley by hand until the needle shown the Reference Needle Position on the preceding page (which varies with the specifications) falls into the needle hole. Loosen bolt O. and move the presser arm forward or back so that the needle falls in the center of the work clamp in tack width directions. 0- - 2. Tack length adjustment Turn the pulley by hand until the needle shown the Reference Needle Position on the preceding page (which varies with the specifications) falls into the needle hole. Loosen screw 0. and move the presser arm to the right or left so that the needle falls in the center of the work clamp in tack length directions. Tack width position Tack length position N 3. Needle and feed timing adjustment Highest position ] frI Timing advanced Feed working - 1:1Feed not working 7= Lowest position -3 74- I • Loosen three bolts 0 and turn feed cam 0 little by little to adjust the timing of the needle and feed so that the feed and stop periods will be uniform as the needle runs up and down (from the top of the needle plate to the tip of the needle: 3 mm for ordinary clothes. 10 mm for denim. 17 mm for knitted clothes). The feed timingadvances as the feed cam is turned in the rotating direction. * When sewing heavy material. advance the feed timing to obtain satisfactory sewing performance. - 25 -

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1.
Tack
width
adjustment
Turn
the
pulley
by
hand
until
the
needle
shown
the
Reference
Needle
Position
on
the
preceding
page
(which
varies
with
the
specifications)
falls
into
the
needle
hole.
Loosen
bolt
O.
and
move
the
presser
arm
forward
or
back
so
that
the
needle
falls
in
the
center
of
the
work
clamp
in
tack
width
directions.
0
-
-
2.
Tack
length
adjustment
Turn
the
pulley
by
hand
until
the
needle
shown
the
Reference
Needle
Position
on
the
preceding
page
(which
varies
with
the
specifications)
falls
into
the
needle
hole.
Loosen
screw
0.
and
move
the
presser
arm
to
the
right
or
left
so
that
the
needle
falls
in
the
center
of
the
work
clamp
in
tack
length
directions.
3.
Needle
and
feed
timing
adjustment
Tack
length
position
N
Tack
width
position
Highest
position
]
f
rI
-
7=
Feed
working
11
:
Feed
not
working
Timing
advanced
74-
Lowest
position
—
3
I
•
Loosen
three
bolts
0
and
turn
feed
cam
0
little
by
little
to
adjust
the
timing
of
the
needle
and
feed
so
that
the
feed
and
stop
periods
will
be
uniform
as
the
needle
runs
up
and
down
(from
the
top
of
the
needle
plate
to
the
tip
of
the
needle:
3
mm
for
ordinary
clothes.
10
mm
for
denim.
17
mm
for
knitted
clothes).
The
feed
timing
advances
as
the
feed
cam
is
turned
in
the
rotating
direction.
*
When
sewing
heavy
material.
advance
the
feed
timing
to
obtain
satisfactory
sewing
performance.
—
25
-