Brother International LK3-B430 Service Manual - Page 4

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MOTOR :PUL AND Ic2Ta,hF3sere0eL0qoKufre3punm-scBiy.n4gW3I0chheHe(Snrimpgecmhwihci)SnaagnlptgesheipnredegeaBdtdha,ero1,ITpsapeecraketidne,g(MrtDheMoiefateaommrcrehtaPtoiecunrthle)lheineyisetacaabtple1a.bb8el0el0oowrfphamHVing-idgBhtohesslpSetprpleeeeevcedtedansteswtpheirneegIdadastubairteamabkalLVeaxo-giBtwmoeeuSldtthmpueeeeswdtpooehreked.aIotn.f (Inches) (Inches) 50 Hz 2.300 2.000 153105-0.01 (137) 153107-0-01 (119.5) 082105.2-90 (52) 082105.2.90 (52) 082104.9.90 (49) 1,800 153109-0-01 (107.8) 082105.1.90 (51) 2.300 153101-0-01 (115.5) 082105-1.90 (51) 60 Hz 2,000 153101-0-01 (101) 082105-1-90 (51) 1,800 153108-0-01 (91) 082105.0-90 (50) STANDARD • • - • _ • Sub-class Use Upper thread tension (g) Lower thread tension (g) Thread take-up spring height (mm) Thread take-up spring tension (9) Thread take-up lever stroke (mm) • Tension Measurement Upper thread tension -1 • -4 • -5 • -8 For ordinary clothes 80 - 120 15 - 25 6 - 8 15 - 35 2 - 4 -2 • -3 • -6 For denim 180 - 220 15 - 25 8-10 150 ^- 220 5 -7 • -9 For knitted clothes 110 - 150 15 - 25 6- 8 20 - 40 1 - 2 Lower thread tension Thread take-up spring height 4lj kir+ . Start the machine, and measure as shown above. Thread take-up spring tension Measure as shown above. Thread take-up lever stroke Start the machine and measure distance from thread take-up spring to thread take-up lever. Measure it when thread take-up spring is lower to thread take-up lever. Measure distance from lever position when machine is started to its stop position. -2-

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MOTOR
:PUL
AND
The
LK3-B430
High
Speed
Bar
Tacking
Machine
is
capable
of
high
speed
sewing
at
a
maximum
speed
of
2,300
rpm.
When
changing
the
speed,
refer
to
the
table
below
and
select
a
speed
suitable
to
the
work.
In
case
of
using
chemical
thread,
operate
the
machine
at
1.800
rpm
to
prevent
thread
breakage
due
to
heat.
I
I
1
Sewing
High
Speed
I
Low
Speed
speed
I
Motor
Pulley
Frequency
,
V
-Belt
V
-Belt
(rpm)
(Diameter)
(Inches)
(Inches)
2.300
153105-0.01
(137)
082105.2-90
(52)
082104.9.90
(49)
50
Hz
2.000
153107-0-01
(119.5)
082105.2.90
(52)
1,800
153109-0-01
(107.8)
082105.1.90
(51)
2.300
153101-0-01
(115.5)
082105-1.90
(51)
60
Hz
2,000
153101-0-01
(101)
082105-1-90
(51)
1,800
153108-0-01
(91)
082105.0-90
(50)
STANDARD
•
•
-
•
_
•
Sub
-class
—1
•
—4
•
—5
•
-8
-2
•
-3
•
-6
-7
•
-9
Use
For
ordinary
clothes
For
denim
For
knitted
clothes
Upper
thread
tension
(g)
80
-
120
180
—
220
110
—
150
Lower
thread
tension
(g)
15
-
25
15
-
25
15
-
25
Thread
take-up
spring
height
(mm)
6
—
8
8-10
6
-
8
Thread
take-up
spring
tension
(9)
15
-
35
150
^-
220
20
—
40
Thread
take-up
lever
stroke
(mm)
2
—
4
5
1
—
2
•
Tension
Measurement
Upper
thread
tension
4lj
kir+
.
Start
the
machine,
and
measure
as
shown
above.
Thread
take-up
spring
tension
Measure
it
when
thread
take-up
spring
is
lower
to
thread
take-up
lever.
Lower
thread
tension
Measure
as
shown
above.
Thread
take-up
lever
stroke
Measure
distance
from
lever
position
when
machine
is
started
to
its
stop
position.
Thread
take-up
spring
height
Start
the
machine
and
measure
distance
from
thread
take-up
spring
to
thread
take-up
lever.
—2—