JUKI LH-1152-5 User manual
BE003600B0B
U
MODEL
LH-1152-5
2-ISIEEDLE,
NEEDLE
FEED
LOCKSTITCHER
WITH
AUTOMATIC
THREAD
TRIMMER
Before
operating
your JUKI Lockstitch
Machine,
please
reaid
this
Instruction
Book
carefully
in
order
to operate it in the correctandefficient
manners.
Instruction
Book
BEFORE
OPERATION
1.
Don't
run
the
machine
before
filling
the
oil .'reservoir
with
the
prescribed
lubrioatirtgoil.
2.
After
setting up
your
machine, make sure
that
it runs
in
the
correct
direction;
lower
the
needle
by
turning
the
handwheel
and
watch
the
handwheel's
revolution
by
momentarily
switching
the
power
"on"
(correct rotational
direction
of
the
handwheel:
counterclockwise
when
viewed
from
the
handwheel's
end).
3.
Run
the
newly
installed
machine
at
aspeed
of
4,000
s.p.m.
or
lower
for
the
first
4
weeks.
4.
Don't
hold the machine by its synchronizer behind
the
handwheel when you move
the
machine head for
installation.
5. Confirm
the
ratings of
your
power source by
the
machine
plate stuck on the motor (power voltage, phase etc.).
SPECIFICATIONS
Stitch
specification
CAUTIONS
IN
OPERATION
1. Don't
put
your hand under
the
needle when you turn the
main
switch
"on"
or
operate
the
machine.
2.
Don't
put
your fingers into
the
thread take-up cover.
3. Don't forget to turn the main switch
"off"
before you tilt
the
machine
head
back
or
remove
the
V-belt.
4. Never bring your fingers or hair close
to,
or place anything
on
the
handwheel, V-belt,
bobbin
winder wheel or
motor
during operation. It may lead
to
serious personal injuries.
5. If your
machine
is
provided
witha belt
cover,
finger
guard
and eye
guard,
never
operate your
machine
with any of
them
removed.
Fabrics
Sewing
speed
General
fabric
medium-weight
Gtemical
shoes
Stitch
length
(max.)
Needle
gauge
Presser
foot
lift
Lubricating
oil
See "34. Table of sewing speed for needle gauges" (p.8)
4
mm
(5/32").
6 mm
(15/64")
4
mm
(5/32")
Sgxl906
#9~#U
DPX5
#11-#22
DP
X 5
#18
-
#22
3/32"
~1-1/4"
(2.4
mm
~
31.8
mm)
3/16"
-1-1/4"
1/8" - 1-1/4"
(3.2-31.8
mm)
(1/8" on special request)
(i/8" on
special
request)
|
(4.8
mm
—
31.8
mm)
[
6 mm (15/64") by hand lifter. 10 mm (25/64") by knee lifter
JUKI
New
Defrix
Oil No. 2 (Oil for Overedger)
3/32"
-
1/4"
(2.4
mm
-
6.4
mm)
1.
INSTALLATION
From the library of: Superior Sewing Machine & Supply LLC
2.
LUBRICATION
5
'L"
mark
j
*H"mark
Oil reservoir
Oilsightwindow^
•k
Before operating machine:
1. Pour the JUKI NewDefrix Oil No. 2 into the oil reservoir up
to
"H"
mark.
2.
Add
the
same
lubricating oil as
soon
as
the
oil level has
come
down
to
the
"L"
mark
level.
3. Run
the
machine and make sure
that
the
oil splash is seen in
the
oil sight window, (more
than
1,000 s.p.m.)
4. Take note that, when the ambient temperature drops down
to 5 C or lower, the amount of lubricating oil supplied to the
face
plate
components
will
become
smaller
and
to
the
contra
ry, more amount of oil will be fed to
the
sewing hooks. So,
adjust their oil regulating screwsproperly. Also when you use
the
lubricating oil
of
other
trade names, check for
the
lubri
cation on these components after the first 30 minute's opera
tion and adjust the above-mentioned screws when necessary.
(CAUTION) Before operating newly Installed machines or ma
chines which have not been used for a relatively long period of
time, let them idle for about 10 minutes at 3,000 to 3,500 s.p.m.
Maker
spot
(Min.
oil
amount)
(Max. oil
amount)
*
Adjustment
of
oil
amount
for
the
face
plate
components:
Amount
of
lubricating oil supplied to
the
face plate
components
such a£
thread
take-up lever and needle bar
crank
is adjustable
by turning adjusting pin O : bring
the
marker
spot
engraved
on
the
adjusting
pin
close
to
needle
bar
crank
0
to
minimize
or
farthest
from
the
needle
bar
crank
to
maximize
the
amount
of
oil.
★
Adjustment
of
oil
amount
for
the
hook;
Loosen
nut
O and
turn
adjusting screw 0 clockwise to
increase
or
counterclockwise
to
reduce
the
amount
of
oil
fed
to
the
hook.
(CAUTION) In order
to'
prevent adjusting screw 0 from
breakdown,
gently
tighten
nut
O.
3.
INSTALLATION
OF
THREAD
STAND
Assemble
the
thread
stand,
set
it
up
on
the
machine
table
using
the
installation
hole in the table
and
tighten
nut
Ogently.
When
you
use
power
supplied
by
the
overhead
power
line,
pass
the
power
supply
cord
through hollow spool rod
0.
CD
4.
ATTACHING
THE
BELT
COVER
<0:
<
(mm)
- 2 -
THREAD
WINDER
1. Make guide holes ®
and
© in the table for
wood
screws.
2. Screw belt cover
post
O
into
the
tapped
hole in
the
machine
arm.
3. Fix belt cover 0 to the
belt
cover
post
and
then
to
the
groove
on
the
machine
arm.
4.
Put
thread
winder
assembly 0 in
the
belt
cover
and
adjust
its
position.
5.
Attach
top
cover
O to
the
belt
cover.
6.
Tilt
the
head
back
and
make
sure
that
the
belt
cover
does
not
touch
the
table.
7. Fix the thread winder using the wood screws and guide
holes © and
©.
From the library of: Superior Sewing Machine & Supply LLC
5.
HOW
TO
ADJUST
THE
SYNCHRONIZER
(Attaching
the
synchronizer)
1,
Attach
the
synchronizer
to
the
handwheel.
2.
Let
the
machine
perform
thread
trimming
action
and
adjust
the
position
of
the
synchronizer
by
loosening its setscrews 0 so
that
the
handwheel
stops
with its
two
white
maloing
spots
O
surrounding
in
the
middle
a
red
marking
spot
0
engraved
on
the
machine
arm.
(Notes) Accurately position it
through
your
trial sewing.
ow
6.
ATTACHING
THE
NEEDLES
*
Switch
"off
the
motor.
Use Sg X 1906 needles
for
Specification A and DP x 5
needles
for
Specifications
S
and
G.
1.
Turn
the
handwheel
until
the
needle
bar
has
come
up
to
the
highest
point
of
its
stroke.
2. Loosen needle clamp screws 0 and pick up two needles O
in
the
way
that
their
recesses are facing
outwards.
3.
Insert
the
needles
into
the
needle
clamp
as
far
as
they
wall go.
4. Tighten needle clamp screws 0 firmly.
9.
INSERTING
A
BOBBIN
IN
A
BOBBIN CASE
1.
Hold
a
bobbin
in
the
way
that
it
seems
being
wound
clockwise
and
put
it
in
the
bobbin
case.
2.
Pass
the
thread
through
thread
path
O in
the
bobbin
case
and
draw
the
thread, and the thread will
be
brought
to
thread
hole
0
via
the
tension
spring.
*
Make
sure
that
the
bobbin
revolves
in
the
direction
of
the
arrow
when
you
draw
the
thread.
7.
HOW
TO
TAKE
OUT
THE
BOBBIN
CASE
1.
Lift
latch
O
and
take
out
the
bobbin
case
and
the
bobbin
together.
2.
Hold
the
bobbin
case
by
latch
raised,
put
it
into
the
shaft
in
the
hook
correctly
and
release
the
latch.
8.
WINDING
THE
BOBBINS
(SINGLE
BOBBIN
WINDER)
9
1.
Take
the
thread
end
from
a
thread
spool,
pass
it
through
the thread guides as 0 , © and 0 and wind it several
turns
round
the
bobbin.
2. Tilt bobbin presser Opermitting
the
thread winder pulley
to
touch
the
running
belt.
3. Adjust screw 0 to wind a
bobbin
about
80%
of
its
capacity;
turn
the
adjusting
screw
clockwise
to
increase
or
counterclockwise
to
reduce
the
amount
of
thread
to
be
wound.
4.
If
the
bobbin
is
wound
unevenly,
adjust
it
by
moving
the position of tension bracket 0 to the left or the right.
5.
When
the
bobbin
is filled
up,
the
bobbin
presser
auto
matically releases
the
thread
winder pulley from
the
running
belt.
(See
P.
10
for
a
twin
bobbin
winder)
- 3
From the library of: Superior Sewing Machine & Supply LLC
10.
TWIST
OF
SEWING
THREAD
S
twist
twist
It
is
advisable
to
use
the
left-twist
thread
(S
twist)
for
the
needle
on
the
left
and
the
right-twist
thread
(Z
twist)
for
the
needle
on
the right. If it is
not
possible, use only the
right-twist
thread
(Z
twist).
Either
twist
will
do
for
the
bobbin
thread.
12.
STITCH
LENGTH
.7?
Set stitch dial O for a desired stitch length.
* Revert feed
operation
1. Depress reverse feed
control
lever
O.
2. Reverse stitches are made as long as you
keep
depressing
the
lever.
3. Release
the
lever, and the
machine
will
run
forward.
14.
CONNECTION
OF
THE
PEDAL
^Attach
the
pedal connecting rod
Move pedal adjusting
plate
O to the
left
or
the
right
to
make
motor
control
lever O and
pedal connecting
rod
&straight.
*Adjusting
the
slant of
the
pedal:
Slant of the pedal is adjustable by changing
the effective length of the pedal connecting
rod.
Tighten
firmly
the
clamp
screw
of
the
connecting
rod
after
the
adjustment.
11.
THREADING
THE
MACHINE
("C" specification)
Thread
the
machine
as
illustrated.
Thread
O
to
®
for
the
needle
on
the
left.
Thread O to ® for
the
needle on
the
right.
(NOTE)
When
you
operate
the
thread
trimmer
after
providing
concealed
seams,attach optional thread guide O (Part No. 10102259) to the face plate.
13.
HOW
TO
OPERATE
THE
PEDAL
High-speed
Low-speed
Thread
trimming
The
pedal is
operated
in 4 stages.
1. Depress
the
pedal lightly forward for low-speed operation.
2. Depress the pedal further forward for high-speed operation.
3.
Bring
the pedal back to its initial position, and the machine will stop
with
the
needle
"up"
or
"down".
4. Depress the pedal backward (toe-up) for thread trimming.
o You can depress the pedal backward for thread trimming directly
from its high-speed or low-speed position,
o You can bring the pedal back to its initial position immediately after
you have confirmed the start of a thread trimming action. The
machine will stop after completing a thread trimming action,
o If you want to rise the needle which has stopped, in "down"
position,
depress
the
pedal
once
backward.
(NOTES) This machine is designed to permit you to select the machine
to stop with the needle
"up"
or
"down".
Refer to the separate
instruction
Book
for
the
Motor
for
further
details.
- 4 -
From the library of: Superior Sewing Machine & Supply LLC
15.
THREAD
TENSION
Increase
iReduce
I
ncrease
Reduce
♦
Needle
thread
tension
Turn
thread
tension
nut
No.
2 ®
clockwise
to
increase
or
counterclockwise
to
reduce
the
needle
thread
tension.
Turn
thread
tension
nut
No.
1 ®
clockwise
to
increase
or
counterclockwise
to
reduce
the
length
of
the
thread
left
in
the
needle
after
thread
trimming.
•it
Bobbin
thread
tension
Turn
tension
adjusting screw ®clockwise to increase or
counterclockwise
to
reduce
the
bobbin
thread
tension.
17.
HAND
LIFTER
o
When
you
want
to
keep
the
presser
foot
in
the
lifted position,
turn
hand
lifter
®
in
the
direction
of
the
arrow.
By
so
doing
the
presser
foot
will rise
6
mm
(15/64")
and
stay
until
the
hand
lifter
is
lowered.
Operate
the
knee
lifter,
and
the
presser
foot
will
rise 10 mm
(25/64")
from
its
working
level.
19.
RELATION
BETWEEN
THE
MAIN
SHAFT
AND
THE
HOOK
DRIVING
SHAFT
Engraved
Needle
Throat
plate
Engraved
line
Relation
between
the
main
shaft
and
the
hook
driving
shaft
is
determined
by
the
timing
belt.
If
you
replace
or
remove
the
timing
belt
from
the
shaft
for
repair
or
adjustment
of
the
related
parts,
you
must
position
the
timing
belt
exactly
in
the
following
way;
1.
Set
the
stitch
dial
to
"0".
2.
Turn
the
handwheel
in
the
normal
direction
until
the
pointed
end
of
the
needle
had
come
down
to
the
level
of
the
throat
plate.
3.
Turn
the
hook
driving
shaft
in
the
normal
direction
until
the center of No. 1 setscrew
O.
of the hook driving shaft
thrust
collar
aligns
with
the
engraved
line
on
the
bed.
4.
Put
timing
belt
O
on
lower
sprocket
wheel
O
taking
care
not
to
move
the
hook
driving
shaft
and
the
main
shaft
from
the
above-mentioned
position.
16.
THREAD
TAKE-UP
SPRING
0
0O
m
0
o00
•k
When
you
want
to
change
the
stroke
of
the
spring:
1.
Stroke
of
take-up
spring
O
on
the
left
is
adjustable
by
moving
stopper
®
to
the
left
or
the
right
after
loosening
stopper
setscrew
@ .
2.
Stroke
of
take-up
spring
O
on
the
right
is
adjustable
by
moving
stopper
@ to
the
left
or
the
right
after
loosening
stopper
setscrew
® .
3. Move
the
stopper
to
the
right
to
increase
or
to
the
left
to
reduce
the
stroke
of
the
take-up
spring.
^ When
you
want
to
change
the
tension
of
the
spring:
1.
Tension
of
the
take-up
spring
on
the
left
is
adjustable
by
turning
stud
®
counterclockwise
to
increase
or
clockwise
to
reduce
after
loosening
nut
O .
2.
Tension
of
the
take-up
spring
on
the
right
is
adjustable
by
turning
spring guide ®clockwise
to
increase
or
counterclockwise to reduce
after
loosening setscrew
O.
18.
ADJUSTMENT
OF
THE
PRESSURE
OF
THE
PRESSER
9
Loosen
nut
Q
and
turn
presser
spring
regulator
O
clockwise
to
increase
or
counterclockwise
to
reduce
the
pressure
of
the
presser
foot.
Tighten
nut
0
after
the
adjustment.
When
sewing
general
fabrics,
adjust
the
height
of
the
head
of
the
presser
spring
regulator
to
28
to
30
mm
(1-7/64"
to
1-3/16")
The
height
is
equivalent
to
approx.
5 Kg.
20.
ADJUSTING
THE
FEED
TIMING
The
feed
eccentric
must
be
fixed
in
phase
with
the
hook
driving
shaft.
1.
Loosen
screws O
which
set
the
feed
eccentric
guide.
2.
Align
engraved
marker
spot
O
on
the
feed
eccentric
with
marker
spot
0
on
the
hook
driving
shaft.
(CAUTION)
When adjusting
the
feed
eccentric,
take
care
not
to
move
it
in
the
axial
direction.
Because
it
may
increase
the
load.
- 5 -
From the library of: Superior Sewing Machine & Supply LLC
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