Seiko LSC-8BV-1.8BLV-1 User manual
LSC-8BV-1
OPERATING
INSTRUCTIONS
FOR
LSC-8BV-1.8BLV-1
LSC-8B-I.8BL-1
LSC-8BH-I.8BLH-I
as
E ( K
II
LSC-8B-1
SEIKO
SEWING
MACHINE
CO.,
LTD.
TOKYO•JAPAN
From the library of: Superior Sewing Machine & Supply LLC
INSTRUCTIONS
FOR
SEIKO
MODEL
LSC
TYPE
INDUSTRIAL
SEWING
MACHINES
This
is a
guide
to
use
of
SEIKO
model
LSC
type
industrial
sewing
machines
under
the
best
condition.
SEIKO
LSC series are a single needle, lock-stitching, needle,
upper
&
lower
feed, reverse feed, semi-automatic lubrication
system,
cylinder
bed sewing
machine.
Please read
this
guide
thoroughly
so
that
you
may
expect
good
performance.
Specifications
Model
LSC-8BV-1
LSC-8BLV-1
LSC-8B-1
LSC-8BL-1
LSC-8BH-1
LSC-8BLH-1
Speed
(s.p.m.)
2,500 2,200
2,300
2,200
2,500
2,200
Needle
DPx
17
Standard
^16
Standard
#16
Standard
#18
Standard
#18
Standard
#16
Standard
#16
Hook
Rotary
Standard
Large
Standard
Large
Standard
Large
Stitch
Length (Max.) 6
mm
7
mm
6
mm
7
mm
6
mm
7
mm
Presser
Foot
Alternating
pressers
Presser Lift
Up/Down
Moving
Amount
3 — 6
mm
Presser
Lift
8
mm
(by
lever)
Needle
Bar
Stroke
33.2
mm
Thread
Take
Up Slide
motion
type
Thread
Take
Up
Stroke
57.5
mm
67
mm
57.5
mm
67
mm
57.5
mm
67
mm
Diameter of Cylinder Bed
46
mm
50
mm
46
mm
50
mm
46
mm
50
mm
Working
Space
258
mm
x
110
mm
Weight
29
kg
(with
base)
Motor
250
W •
2P
Clutch
Motor
Thread
Synthetic
Use: All kinds of work In the clothing, footwear, upholstery, leather industry such as shoes, canvas
products, dress shields, sleeve, sandals, gloves, sports goods, especially. Model LSC-8BV-1 &
LSC-8BLV-1
are suitable for various kinds of tape stitching with a edge binder which isinterchange
able
without
having any
alternation
to
any
other
parts.
From the library of: Superior Sewing Machine & Supply LLC
1
—
INDEX
CONTENTS
Page
Setting up
the
machine 2
Oiling 2 —3
Oil
adjustment
3
Needle
4
Thread
4
Winding
bobbin
5
Adjustment
of
the
bobbin
winder
5
Inserting and removing
the
bobbin
6
Threading
the
machine
7
Regulating
the
thread
tension 7
Regulating
the
pressure
on
goods 8
Adjusting the stitch length and reverse stitch 9
Adjusting the lift
of
the alternating presser feet 9
Instructions
for
LSC-8BV-1
and
8BLV-1
10
INFORMATION
FOR
ADJUSTMENT
Adjusting
the
height
of
the
feed dog 11
Adjusting
the
timing
of
the
needle plate, needle and feeder 11 —12
Adjusting
the
height
of
the
needle
bar
12
Timing between
the
needle and the hook 13
Timing between the needle and the feeder 14
Adjusting the height
of
the
presser feet
14—15
Timing
of
the vibrating presser foot 15
Adjusting
the
thread controller spring 16
From the library of: Superior Sewing Machine & Supply LLC
SETTING UP THE MACHINE (Fig. 1)
»
Before
setting
up
the
machine
on
the
table,
attach
the
relative
parts
to
the
table.
(1) Stand (2) Motor
(4) Cotton stand (5) Tape stand (only
LSC-8BV-1,
(7) Knee lifter
8BLV-1)
and Machinebase
(9) V shape belt (10) Bobbin winder
if
(3) Treadle
(6) Machinehead
(8) Chain
Fig. 1
OILING AND ITS
ADJUSTMENT
(Fig.
2)
* Do
not
operate
the
machine,
even
if
for
testing,
unless
it
has
been
pro
perly
oiled.
To
fill
the
oil
reservoir
on
the
top
of
the
machine,
pour
oil
through
the
oil filler hole (A), until oil level
reaches
to
the
upper
reference
line (B).
♦
Oiling
is
automatically
made
by
the
vibration
of
the
machine
while
sew
ing
operation
through
the
oiling
wicks
in
the
machine,
and
oil flow
stops
automatically
when
the
operation
of
the
machine
ends.
From the library of: Superior Sewing Machine & Supply LLC
»When
starting
the machine initially and
after
kept
away for a long time
without using
at
all,
make
sure the oil volume through oil level indicator
(B),
and oil sufficiently to respective necessary
parts
before
starting
operat
ion
and
try
pre-running.
OIL
ADJUSTMENT
><•
While operatingthe machine, the lubrications to each spot of the machine
are
made.
When
the
machine
is in
continuous
operation,
stop
oiling
for
a
while
at your option. In
that
case, turn the dial until two points fit together as
per the following picture, then the dial comes down and the lubrications
are
stopped
perfectly.
OIL
ADJUSTER
From the library of: Superior Sewing Machine & Supply LLC
NEEDLE {Fig.3)
*
The
size of the needle to be used should be
determined
by
the
size of
the
thread,
which
must
pass
freely
through
the
eye
of
the
needle.
HOW
TO
ATTACH
THE
NEEDLE
1.
Turn
the
machine
pulley
over
toward
you
until
the
needle
bar
(1)
moves
up
to
it's
highest
point.
2. Loosen the needle
set
screw
(2)
and
put
the
needle (3) up into
the
needle
bar
as deeply as it will go,
with
the
long groove of
the
needle faces
the
left.
3.
Tighten
the
needle
set
screw
securely.
THREAD
* Cotton, synthetic or silk
thread
can
be used according to your purpose,
the
thickness
of
thread
is
up
to
#8
*Always use left
twisted
thread
for upper thread, but you
can
use
either
right
or
left
twisted
thread
for
lower
thread.
From the library of: Superior Sewing Machine & Supply LLC
WINDING
THE
LOWER THREAD ON
THE
BOBBIN
(Fig.
4)
1.
Push
a
bobbin
on
the
bobbin
winder
spindle
(1)
as
far
as
it will go.
2.
Pass
the
thread
from
the
thread
stand
downward
through
the
eye
(7)
in
the
tension
bracket,
then
between
and
around
the
back
of
the
tension
disc.
3.
Bring
the
thread
forward
toward
the
bobbin
and
wind from
below
in
clock-wise
direction
several
times
around
the
bobbin.
4.
Push
the
lever
(3)
toward
the
other
side
so
that
the
pulley
(2)
and
V
belt
(9, Fig. 1) will
engage
and
then
start
the
machine.
5.
The
pulley (2) will
automatically
be
free
from
the
belt
and
stopped
after
the
bobbin
is
filled
with
thread.
THE
ABOVE
OPERATION
CAN
BE
DONE
WHILE
SEWING.
ADJUSTMENT
OF
THE
BOBBIN
WINDER
(Fig.
4)
*
IN
CASE
OF
UNEVEN
WINDING
If
the
thread
does
not
wind
evenly
on
the
bobbin,
loosen
the
screw
(4)
in
the
tension
bracket
and
move
the
bracket
to
the
right
or
left
as
may
be
required,
then
tighten
the
screw.
*
WINDING
AMOUNT
OF
THREAD
Adjustment
screw
(5)
can
be
turned
in
or
out
to
increase
or
decrease
the
amount
of
thread
wound
on
the
bobbin.
*
WINDING
STRENGTH
Strength
of
the
winding
can
be adjusted
with
nut
(6).
Fig. 4
From the library of: Superior Sewing Machine & Supply LLC
INSERTING AND REMOVING BOBBIN (Fig. 5
and
6)
1.
Raise
the
needle
bar
to
its
highest
point.
Draw
out
the
end
cover
(6,
Fig.
3)
2.
Pull
up
the
latch
(1,
Fig.
5)
and
draw
out
the
bobbin
from
the
bobbin
3.
To
insert
a full
bobbin
(Fig. 6),
hold
it
pulling
out
the
end
of
thread
by
about
5
cm,
and
insert
the
bobbin
into
the
bobbin
case.
4.
Lead
the
end
of
thread
pulled
out
through
the
slot
of
the
bobbin
case,
and
under
the
tension
spring
(1,
Fig.
6)
and
then
the
thread
guide.
*
THREAD
WINDING
DIRECTION
when
fitting
the
bobbin
into
the
bobbin
case.
Check
the
thread
winding
direction
as
shown
Fig.
No.
6.
5.
Draw
out
about
5
cm
of
the
end
of
thread,
pull
up
the
latch
(1, Fig. 5)
keeping
the
slot
of
the
bobbin
case
faces
upper
side.
And
fit
the
bobbin
case
into
the
hook
as
deeply
as
it'will
go,
and
push
down
the
latch
securely.
6.
Close
the
end
cover,
but
leave
sufficient
space
for
passage
of
the
thread.
4'5
From the library of: Superior Sewing Machine & Supply LLC
THREADING
THE
MACHINE (Fig. 7)
1. Raise the needle
bar
to
its
highest point
and
lead
the
thread
from
the
thread
stand
the
following
order:
From
the
thread
stand,
lead
the
thread
to
the
thread
guide (1) on
the
top of the machine arm, down to the upper guide hole of the thread guide
(2)
from right to left.
Pass
the
thread
in weaving fashion through the
other
two
holes in (2)
and
from
right
to
left
over
and
between
the
tension discs
(3).
Now pull the thread downward from right to left beneath and around
thread
controller
(4),
continue to pull the thread upward through the fork in
the
thread
controller
and
against
the
check
spring
(5)and
through
the
thread
guide
(6),
pull the thread upward through the eye in the take-up lever
(7)
down through the
thread
guide
(6)
again and then through the
thread
guide
(8),
(9) and
(10),
and from left to right through the eye of the needle.
2.
After
the
above
threading,
hold
the
end
of
thread
with
I t
your
left
hand,
and
turn
the
7—4—^1
pulley
with
your
right
hand
so
• '
.0
-1%
El
=•
=1
i ^
that
bobbin
thread
may
be
pick-
® ed up by
needle
thread.
And
put their ends of
thread
on the
®rii
i--
ifri'i
other
side
bed
through
under
1
iJ-JB**/
^
the
presser
foot
for
starting
9—12
operation.
DETQcrmii
Fig. 7
REGULATING
THE
THREAD
TENSIONS
* For ordinary stitching, the tension ofthe upper and lower threadsshould
be equal so as to lock both threads in the center of the fabric. If the tension
on either
thread
is stronger
than
on
the
other, imperfect stitching will be
the
result.
* If the tension on the upper
thread
is stronger
than
that
on the lower
thread, it will be
straight
along the upper surface of
the
fabric.
* If
the
tension
on
the
lower
thread
is
stronger
than
that
on
the
upper
thread, the lower
thread
will lie
straight
along the underside of
the
fabric.
Perfect
stitching
Tight tension of needle thread
Loose
tension
of
needle
thread
Fig. 8
From the library of: Superior Sewing Machine & Supply LLC
HOW
TO
REGULATE
THE THREAD TENSION (Fig. 9)
1.
TENSION
OF
THE
UPPER
THREAD
To
adjust
the
tension
of
the
upper
(needle)
thread,
turn
the
serrated
nut
(1)
to
the
right
for
increasing
tens
ion. If
you
desire
to
decrease
it,
turn
the
nut
to
the
left.
2.
TENSION
OF
THE
BOBBIN
THREAD
To
increase
the
tension,
turn
the
screw
(2,
Fig.
6)
to
the
right,
and
to
decrease
it,
turn
the
screw
to
the
left
by
a
screw
driver.
Fig. 9
ADJUSTMENT
OF
THE
PRESSURE
ON GOODS (Fig. 10)
The
pressure
of
the
presser
feet
is
regulated
by
the
adjusting
screw
(1).
*
To
increase
the
pressure,
turn
the
screw
to
the
right.
*
To
decrease
it.
turn
the
screw
to
the
left.
1
» / # \ i "S
From the library of: Superior Sewing Machine & Supply LLC
ADJUSTING THE STITCH LENGTH (Fig. 11)
Stitch length is adjusted by turning the
serrated
nut
(11)
so
that
the re
ference
mark
on
the
collar
(3)
comes
in line
with
the
desire
number
of
stitch
length on
the
plate
(2).
♦
If you
desire
to
decrease
the
stitch
length,
turn
the
serrated
nut to
the
right.
» When you desire reverse stitch, push the lever
(4)
up as far as it will go.
•'
''j
^ -11
Fig. 11
ADJUSTING THE
LIFT
OF THE
ALTERNATING
PRESSER FEET (Fig. 12)
The
thickness of the material sewn should control the height of the lift
of
the
alternating
presser
feet.
It
should
normally
be
just
high
enough
for
clearance
of
the
material.
With
normal
adjustment
both
feet lift to equal height.
* To adjust
the
lift, loosen
the
wing nut
(1),
move up
the
nut
to
raise
the
lift,
and
push
down
this
nut
to
lower
the
lift.
*
When
altering
the lift of the lifting
presser
foot (4, Fig. 3) unequally
against
that
of
the
vibrating
presser
foot
(5,
Fig. 3) or vice versa,
see
the
instructions
"ADJUSTING
THE
HEIGHT
OF
THE
PRESSER
FEET".
Fig.
12
From the library of: Superior Sewing Machine & Supply LLC
TO
INSTRUCTIONS FOR THE MACHINE WITH SYNCHRONIZED BINDER
TAPING {Fig. 13)
HOW
TO
SET
THE
TAPE
1. Lift the
serrated
two
nuts
(1)slightly
and
open the
plate
(2)
toward
you.
2. Pass the tape
(3)
alternately as indicated in the Fig. 28 through the
tape
guide
(4).
3. Cut obliquely the edge of the tape and pass it through the binder
(5)
and
draw
it
out
about
2
cm.
* If the tape has the right and wrong side, pass the tape the wrong side
up.
4.
Then,
close
the
plate
(2).
ADJUSTING
THE
BINDER (Fig. 13)
The setting position of the binder depends on the shape of the binder,
tape
width
and
thickness
of goods.
Accordingly, it is determined through actual sewing test.
* To adjust this, loosen the nut
(1),
move the binder to the right or left
to
get
proper
position.
Then,
tighten
the
nut.
*
AVAILABLE
various
kinds
of
binder
Binders, two-fold, three-fold and four-fold,
are
interchangeable without
having any alteration to any other parts. Any kinds of binder will be avail
able
on
order.
From the library of: Superior Sewing Machine & Supply LLC
ADJUSTING
THE
HEIGHT
OF
THE
FEED
DOG
(only
Model
LSC-8B4,
8BL-1)
The
maximum height of the feed dog
(1,
Fig.
15)
from the surface of
the needle
plate
(2, Fig. 15) is
normally
1 mm.
» To
adjust
this
height;
1. Lay down the machine head toward the other side, and turn the hand
wheel so as to raise the feed dog to its highest point.
2. Loosen
the
set
screw
(1, Fig. 14)
3.
Adjust the height of the feeder by raising or lowering it.
4. Securely tighten
the
screw.
m
Fig.
14
LSC-8B-1,8BL-1 Fig.
15
ADJUSTING
THE
TIMING OF
THE
NEEDLE PLATE, NEEDLE AND FEEDER
1) RELATIVE POSITION OF
THE
FEEDER TO NEEDLE PLATE
(LSC-8BV-1, 8BLV-1, 8BH-1, 8BLH-1)
1.
Lay
down
the
machine
head
toward
the
other
side,
and
check
that
the
screw
(2, Fig. 16) is
securely
tightened
on
the
V
ditch
(1,
Fig.
16).
2.
Adjust
the
feed
motion
to
the
maximum
and
loosen
the
screw
(2,
Fig.
19)
with
a
hexagon
wrench
(standard
accessories).
3.
Set
the
position
of
the
feeder
so
that
both
clearances
between
feeder
and
needle
plate
are
equal
before
starting
feed
motion
and
after
finishing
4.
Securely
tighten
the
screw
(2,
Fig.
19)
1.
Lay
down
the
machine
head
toward
the 1 J
other
side,
and
loosen
the
screw
(2,
Fig.
14)
H|r
2.
Adjust
the
feed
motion
to
the
maximum
[ Vj
BQ
and
set
the
position
of
the
feeder
so
that
both
clearances
between
feeder
and
needle
^
HI
plate
are
equal
before
starting
feed
motion
/"
and
after
finishing
the
feed.
^ J ^
3.
Securely
tighten
the
screw.
Fig.
16
LSC-8BV-1,
8BLV-1
8BH-1,8BLH-1
From the library of: Superior Sewing Machine & Supply LLC
2) THE
POSITION
OF THE
NEEDLE
AND
NEEDLE
HOLE
OF THE
FEEDER
• To adjust this,
turn
the
hand
wheel to
raise
the
needle
bar
to
its
high
est
point
and
put
a
perfect
needle.
•
Turning
the
hand
wheel to
lower
slowly the needle
bar,
check
whether
the
needle
descends
to
the
center
of
the
needle
hole
of
the
feeder
or
not.
• If
the
needle
does
not
enter
into
the
center
of
the
hole,
1.
Lay
down
the
machine
head
toward
the
other
side,
and
check
the
screw
(3, Fig. 14, Fig. 16) is securely tightened on
the
Vditch (1, Fig. 16).
2.
Remove
the
cover
(5,
Fig.
11)
3.
Loosen
the
screw
(1,
Fig.
17)
4.
Holding
the
bottom
of
the
needle
bar
rock
frame
(1, Fig. 18),
move
it
as
may
be
required
to
get
the
correct
position
to
the
feeder.
5.
Tighten
the
screw
and
close
the
cover.
Fig.
17
Fig.
18
ADJUSTING
THE
HEIGHT
OF
THE
NEEDLE
BAR
*
When
the
needle
bar
is
at
its
lowest
point,
normally
the
measurement
between
the
surface
of
the
needle
plate
and
the
upper
end
of
the
needle
eye
is
12.6 mm (LSC-BBV-l), 12.8 mm (LSC-8B-1), 13.1 mm (LSC-8BLV-1) and
13.3
mm (LSC-8BL-1)
*
To
adjust
this,
1.
Loosen
the
screw
(2,
Fig.
18)
2. Move
the
setting
position of the needle
bar
and
needle
bar
connecting
stud
(3,
Fig.
18)
to
get
the
correct
position.
3.
Tighten
the
screw.
NOTE:
These
measurements
are
approximate
standard,
accordingly, fol
lowing final adjustments, TIMING
BETWEEN
THE
HOOK AND
THE
NEEDLE,
are
recommended.
From the library of: Superior Sewing Machine & Supply LLC
TIMING
BETWEEN
THE
HOOK
AND
THE
NEEDLE
* After setting the
needle
bar height,confirmas
follows:
Set the stitch length to 0, turn the hand wheel to lower the needle bar to
its lowest point, turn the hand wheel toward you.
When the needle
raises
2 mm (2.5 mm for LSC-8BLV-1, 8BLH-1,
8BL-1)
fromthelowestpoint of its travel,normallythe hook point
comes
at the center
line of the needleand the measurement betweenthe hook point and the upper
endof the
needle
eyeshould be 2 mm,further the
clearance
between the hook
point and the needle hollow should be about 0.05 to 0.1 mm.
•
TIMING
AND THE CLEARANCE ADJUSTMENT (Fig.
19)
1.
Loosen
the
two
screws
(1).
2.
Adjust
the
timing. If
require
earlier,
turn
the
hook
toward
the
direction
of
its
revolution.
3.
Also
adjust
the
clearance
by
means
of
movement
of
the
hook
to
the
right
or
to
the
left
as
may
require.
4.
After
adjustment,
securely
tighten
the
screws.
m
From the library of: Superior Sewing Machine & Supply LLC
TIMING
BETWEEN
NEEDLE
AND
FEEDER
* During the feeder feeds the material, the needle also moves together
with
the
feeder
and
feeds
the
material.
*
To
adjust
this,
1.
Remove
the
top
cover
(2, Fig. 10)
2. Loosen
the
screws
(1, Fig. 21)
and
move
the
cam
(2, Fig. 21)
HOW
TO
ADJUST
1.
Turn
the
hand
wheel
toward
you to
the
point of
the
needle
and
the
point
of
hook
crossed.
2. Pushing the stitch length regulating lever
(4,
Fig.
11)
up and down,
turn the cam
(2,
Fig.
21)
and set at the point both the needle and the
feeder
rest.
3. Tighten the screws securely and close the top cover.
Fig. 21 LSC-8BV-1,8BLV-1
8BH-1,8BLH-1
Fig. 21 LSC-8B-1,8BL-1
ADJUSTING
THE
HEIGHT
OF
THE
PRESSER
FEET
*
ADJUSTMENT
BY
THE
PRESSER
BAR
LIFTER
1.
Loosen
the
screw
(1,
Fig.
10)
sufficiently.
2. Raise the presser
bar
lifter and loosen the
set
screw
{1,
Fig. 22).
3. Move the lifting presser foot (4, Fig. 3) up or down as may be required
so
as
to
get
the
correct
height.
4.
Tighten
the
screws
securely.
From the library of: Superior Sewing Machine & Supply LLC
*ADJUSTING THE LIFT OF ALTERNATING
PRESSER
FEET
If the height of the lifting presser foot changes, the momentums of the
lifting and vibrating presser footvary,thusthe
height
ofthevibratingpress
er
foot
must
be adjusted.
HOW
TO
ADJUST:
1.
Lower the presser bar lifter, holding the vibrating presser foot
(5,
Fig
3)
2.
Loosen
the hexagon screw
(2,
Fig.
22)
and move the presser foot up or
down
as
may
be required.
3.
After
setting
the
position, tighten the screw.
TIMING
OF
THE
VIBRATING
PRESSER
FOOT
*
This
is the normal timing when,
turn
the
hand
wheel
toward
you,
after
lowering the
presser
bar
lifter, the vibrating
presser
foot should
reach
the
feeder
earlier
than
the
needle
eye
comes
to,
and
when
the
needle
raises,
the
vibrating presser foot should leave the feeder
after
the needle eye has left
the
feeder.
This
is due to the reason
that
the vibrating presser foot must tightly
hold
the
goods while
the
needle is passing
the
goods for avoiding
irregular
stitches.
*
To
adjust
this,
1.
Set
the
lift of
the
alternating
presser
feet
to
equal.
2. Loosen
the
two
screws
(3, Fig. 22) and adjust the
rotating
position of
the
cam
(4, Fig. 22)
faster
or
slower
as
may
be
desired.
3.
Tighten
the
screws.
Fig.
22
From the library of: Superior Sewing Machine & Supply LLC
16
ADJUSTING
THE
THREAD
CONTROLLER
SPRING
»
Normally,
the
thread
controller
spring
(2,
Fig.
9)
should
hold
slack
of
the
upper
thread
until
the
needle
reaches
to
the
goods,
and
it
should
pause
while
raising
of
the
needle
and
passing
of
the
upper
thread
through
the
bob
bin
case.
*
For
more
controller
action
on
the
thread
1.
Loosen
the
stop
screw
(3,
Fig.
9)
2.
Move
the
stop
(4,
Fig.
9) to
the
right.
(For
less
action,
move
it
to
the
left)
3.
Tighten
the
screw.
*
HOW
TO
ADJUST
THE
TENSION
OF
THE
SPRING
1.
Loosen
the
serrated
nut
(5,
Fig.
9)
slightly.
2.
Loosen
the
screw
(4,
Fig.
18) slightly.
3.
Turn
the
tension
stud
(6,
Fig.
9)
slightly
to
the
left
to
strengthen
the
tension
(to
lighten
the
tension,
turn
to
the
right)
with
a
screw
driver.
4.
Tighten
the
screw
and
the
nut.
From the library of: Superior Sewing Machine & Supply LLC
i
©
SEIKO
SEWING
MACHINE
CO.,
LTD.
11-3, Imado 1-chome, Taito-ku, Tokyo 111-8534,
Japan
TEL: +81-3-3872-6173,4
(Overseas
group)
FAX:
+81-3-3873-6596
E-Mail: seikOOOl
©tctv.ne.jp
www.tctv.ne.jp/selk0001/
00093000-(E)
From the library of: Superior Sewing Machine & Supply LLC
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