Juki LH-1152-5 Instruction Manual

BE003600B0B

Before

please

operating

reaid

this

your JUKI Lockstitch

Instruction

Book

carefullyinorder

to operate it in thecorrectandefficient

Machine,

manners.

U

2-ISIEEDLE,

WITH

MODEL

NEEDLE

AUTOMATIC

FEED

LH-1152-5

LOCKSTITCHER

THREAD

Instruction

BEFORE

1.

Don't
with

the

2.

After

setting up

in

the

the

handwheel

momentarily

direction

viewed

3.

Run

the

s.p.m.orlower

4.

Don't
handwheel when you move

installation.

5. Confirm

plate stuck on the motor (power voltage, phase etc.).

OPERATION

run

the

machine

prescribed

correct

of

from

newly

hold the machine by its synchronizer behind

the

your

direction;

and

switching

the

the

handwheel's

installed

for

ratings of

before

lubrioatirtgoil.

machine, make sure

lower

watch

the

the

handwheel:

the

first4weeks.

your

handwheel's

power

end).

machineata speedof4,000

power source by

filling

the

the

needle

"on"

(correct rotational

counterclockwise

the

machine head for

TRIMMER

Book

oil .'reservoir

that

it runs

by

turning

revolution

the

by

when

the

machine

CAUTIONS

1. Don't

2.

3. Don't forget to turn the main switch

4. Never bring your fingers or hair close

main

Don't

the

on

the

put

your hand under

switch

"on"oroperate

put

your fingers into

machine

handwheel, V-belt,

IN

head

backorremove

OPERATION

the

needle when you turn the

the

machine.

the

thread take-up cover.

"off"

the

V-belt.

to,

bobbin

or place anything

winder wheel or

before you tilt

during operation. It may leadtoserious personal injuries.

5. If your
and eye

them

machineisprovided

guard,

never

removed.

witha belt

operate your

cover,

machine

finger
with anyof

motor

guard

SPECIFICATIONS

Stitch

specification

Fabrics

Sewing

speed

Stitch

length

(max.)

Needle

gauge

Presser

foot

lift

Lubricating

1.

oil

INSTALLATION

Sgxl906

3/32"

~ 1-1/4"

(2.4mm~

#9~#U

31.8

4mm(5/32").

mm)

General

fabric

medium-weight

See "34. Table of sewing speed for needle gauges" (p.8)

6 mm

(15/64")

DP

X 5

DPX5

#11-#22

3/16"

1/8" - 1-1/4"

(3.2-31.8

(i/8" on

(1/8" on special request)

6 mm (15/64") by hand lifter. 10 mm (25/64") by knee lifter

JUKI

mm)

special

New

request)

Defrix

|

Oil No. 2 (Oil for Overedger)

-1-1/4"

(4.8mm—

31.8

#18-#22

mm)

3/32"-1/4"

(2.4mm-

[

Gtemical

4mm(5/32")

6.4

shoes

mm)

2.

LUBRICATION

Oilsightwindow^

5

'L"

mark

*H"mark

•k

Before operating machine:

1. Pour the JUKI NewDefrix Oil No. 2 into the oil reservoir up

to

"H"

2.

Add

downtothe

3. Run

the

mark.

the

same

lubricating oil as

"L"

the

machine and make sure

mark

oil sight window, (more

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

ry, more amount of oil will be fed to

adjust their oil regulatingscrewsproperly. Alsowhen you use

the

lubricating oilofother

cation on these components after the first 30 minute's opera
tion and adjust the above-mentioned screwswhen necessary.

(CAUTION) Before operating newly Installed machines or ma

chines which have not been used for a relatively longperiod of

time, let them idlefor about 10 minutes at 3,000 to 3,500 s.p.m.

j

Oil reservoir

level.

will

soonasthe

that

than

1,000 s.p.m.)

become

smaller

trade names, check for

oil level has

the

oil splash is seen in

andtothe

the

sewing hooks. So,

the

come

contra

lubri

Maker

spot

(Min.

oil

amount)

*

Adjustment

components:

(Max. oil

of

amount)

oil

amount

Amountoflubricating oil supplied to
such a£

thread

take-up lever and needle bar

by turning adjusting pin O : bring

on

the

adjusting

or

farthest

of

oil.

★

Adjustmentofoil

Loosen

increase

fedtothe

nut

or

(CAUTION) In order

pin

from

the

O and

counterclockwise

hook.

breakdown,

closetoneedle

needle

bar

cranktomaximize

amount

turn

to'

gently

for

adjusting screw 0 clockwise to

to

prevent adjusting screw 0 from

tighten

the

the

bar

the

reduce

for

face plate

crank

marker

crank

hook;

the

nut

O.

the

spot

0

amount

face

plate

components

is adjustable

engraved

to

minimize

the

amount

of

oil

3.

INSTALLATION

4.

ATTACHING

THE

OF

BELT

THREAD

COVER

STAND

CD

Assemble

the

hole in the table

When

overhead

cord

THREAD

1. Make guide holes ®

screws.

WINDER

2. Screw belt cover

machine

arm.

3. Fix belt cover 0 to the

the

grooveonthe

4.

Put

5.

6.

thread

adjust

Attach

Tilt

does

the

not

its

position.

top

head

touch

winder

cover

back

the

the

machine

you

power

thread

table

use

and

power

line,

stand,

using

tighten

supplied

pass

the

through hollow spool rod

and

© in the table for

postOinto

machine

assembly 0 in

O to

the

and

make

table.

belt

arm.

belt

the

cover

cover.

sure

tapped

post

the

that

setitup

the

installation

nut

power

0.

hole in

and

belt

the

O gently.

by

the

supply

wood

the

then

cover

and

belt

cover

7. Fix the thread winder using the wood screws and guide

holes © and

©.

on

to

<0:

<

(mm)

- 2 -

5.

HOW

TO

ADJUST

THE

SYNCHRONIZER

6.

ATTACHING

(Attaching

1,

Attach

2.

Let

synchronizerbyloosening its setscrews 0 so

two
engravedonthe

(Notes) Accurately position it

o

w

THE

NEEDLES

the

synchronizer)

the

synchronizertothe

the

machine

white

maloing

perform

spots

machine

7.

handwheel.

thread

arm.

trimming

O

surroundinginthe

through

HOW

BOBBIN

your

TO

action

that

trial sewing.

TAKE

CASE

and

adjust

the

handwheel

middleared

OUT

1.

Lift

latchOand

the

bobbin

2.

Hold

latch

the

correctly

latch.

the

positionofthe

marking

THE

bobbin

together.

the

bobbin

raised,

shaft

and

stops

with its

spot

take

case

putitinto

in

the

release

and

case

0

out

the

by

hook

the

*

Switch

Use Sg X 1906 needles

needles

1.

Turn

the

"off

the

highest

the

motor.

for

SpecificationsSand

handwheel

pointofits

until

stroke.

for

Specification A and DP x 5

G.

the

needle

bar

has

come

up

2. Loosen needle clamp screws 0 and pick up two needles O

in

the

way

that

their

3.

Insert
wall go.

the

needles

recesses are facing

into

the

needle

outwards.

clampasfarasthey

4. Tighten needle clamp screws 0 firmly.

9.

INSERTING

A

BOBBIN

IN

A

BOBBIN CASE

1.

Holdabobbininthe

thatitseems

clockwise

the

bobbin

2.

Pass

the

thread

bobbin

thread, and the thread will

be

broughttothread

0

via

*

Make

sure

revolves

of

the

draw

the

path

case

the

and

case.

thread

tension

that

in

arrow

thread.

being

O in

and

the

the

wound

put

through

draw

spring.

bobbin

direction

when

to

way

it

the

the

hole

you

8.

WINDING

(SINGLE

BOBBIN

9

in

1.

Take

the

thread

end

the thread guides as 0 , © and 0 and wind it several

turns

round

the

bobbin.

2. Tilt bobbin presser O permitting

to

touch

the

running

belt.

3. Adjust screw 0 to wind a

capacity;

or

be

wound.

4.Ifthe

turn

counterclockwise

bobbiniswound

the

adjusting

the position of tension bracket 0 to the left or the right.

5.

When

the

bobbin

matically releases

belt.

(SeeP.10

foratwin

is filled

the

bobbin

THE

fromathread

BOBBINS

bobbin

screw

to

reduce

thread

the

unevenly,

up,

winder pulley from

winder)

WINDER)

spool,

passitthrough

the

thread winder pulley

about

clockwisetoincrease

amount

adjustitby

the

bobbin

80%

of

thread

presser

the

of

its

to

moving

auto

running

- 3

10.

TWIST

THREAD

It

is

advisable

(S

twist)

right-twist

the right. If it is

right-twist

do

for

the

to

for

the

thread

thread(Ztwist).

bobbin

OF

SEWING

S

twist

twist

use

the

needle

(Z

not

thread.

twist)

left-twist

on

the

for

possible, use only the

Either

the

left

thread

and

needle

twist

the

on

will

11.

THREADING

("C" specification)

THE

MACHINE

12.

STITCH

LENGTH

.7?

Set stitch dial O for a desired stitch length.

* Revert feed

1. Depress reverse feed

2. Reverse stitches are made as long as you

keep

depressing

3. Release

forward.

14.

CONNECTION

THE

operation

the

the

lever, and the

PEDAL

control

lever.

lever

machine

OF

O.

will

run

Thread

Thread

Thread O to ® for

(NOTE)

the

machineasillustrated.

O

to

®

for

When

you

operate

the

needleonthe

the

needle on

the

the

thread

left.

right.

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

The

^ Attach

Move pedal adjusting

the

pedal connecting

* Adjusting

the

pedal connecting rod

righttomake

the

motor

rod

& straight.

slant of

plate

O to the

control

the

left

lever O and

pedal:

or

Slant of the pedal is adjustable by changing
the effective length of the pedal connecting

rod.

Tighten

connecting

rod

firmly

after

the

the

adjustment.

clamp

screwofthe

pedal is

1. Depress

2. Depress the pedal further forward for high-speed operation.

3.

Bring

with

4. Depress the pedal backward (toe-up) for thread trimming.

o You can depress the pedal backward for thread trimming directly

o You can bring the pedal back to its initial position immediately after

o If you want to rise the needle which has stopped, in "down"

(NOTES) This machine is designed to permit you to select the machine

operated

the

in 4 stages.

pedal lightly forward for low-speed operation.

the pedal back to its initial position, and the machine will stop

the

needle

"up"or"down".

from its high-speed or low-speed position,

you have confirmed the start of a thread trimming action. The
machine will stop after completing a thread trimming action,

position,

depress

the

pedal

to stop with the needle

instruction

- 4 -

Book

for

the

once

backward.

"up"or"down".

Motor

for

further

Thread

trimming

Refer to the separate

details.

15.

THREAD

TENSION

16.

THREAD

TAKE-UP

SPRING

Increase

iReduce

I

ncrease

Reduce

♦

Needle

Turn

or

Turn

or

counterclockwisetoreduce

in

the

•it

Bobbin

Turn

counterclockwise

17.

19.

thread

thread

counterclockwise

thread

needle

tension

tension

tension

after

thread

adjusting screw ® clockwise to increase or

HAND

RELATION

MAIN

tension

thread

tension

to

reduce

LIFTER

SHAFT

DRIVING

nut

No.

to

reduce

nut

No.

trimming.

the

o

BETWEEN

SHAFT

2 ®

the

1 ®

the

lengthofthe

bobbin

When

the

lifted position,

lifter

of

the
6

until

lowered.

Operate

and

rise 10 mm

its

AND

clockwise

needle

clockwise

thread

presser

the

presser

mm

the

working

thread

tension.

you

®

in

arrow.

(15/64")

the

the

presser

THE

THE

to

to

thread

want

foot

turn

the

Bysodoing

foot

hand

knee

(25/64")

level.

HOOK

increase

tension.

increase

left

to

keep

in

the

hand

direction

will rise

and

stay

lifter

lifter,

foot

will

from

is

0

O

o

•k

When

you

wanttochange

1.

Stroke
moving
stopper

2.

Strokeoftake-up

moving

stopper

3. Move

to

^ When

1.

Tension

turning
to

2.

Tension

by

the

reduce

you

reduce

turning

of

take-up

stopper

setscrew

stopper

setscrew

stopper

the

strokeofthe

®
@ .

@ to

® .

wanttochange

of

the

take-up

stud

®

after

of

counterclockwisetoincreaseorclockwise

loosening

the

take-up

spring guide ® clockwise

counterclockwise to reduce

18.

ADJUSTMENT

PRESSURE

m

spring

to

the

spring

the

to

the

springonthe

nut

9

the

strokeofthe

O

on

the

leftorthe

O

on

the

leftorthe

right

to

take-up

spring.

the

tensionofthe

O .

spring

on

after

loosening setscrew

OF

OF

THE

Loosen

presser

clockwise
counterclockwise

the

foot.

the

sewing

adjust
headofthe
regulatorto28to30

(1-7/64"to1-3/16")

height

approx.

0

0

spring:

leftisadjustable

right

after

rightisadjustable

right

after

increaseorto

leftisadjustable

the

rightisadjustable

to

increase

THE

PRESSER

nut

Q

spring

regulator

to

increase

pressureofthe

Tighten

adjustment.

general

the

is

5 Kg.

nut0after

height

presser

equivalent

0

0

by

loosening

by

loosening

the

left

spring:

by

O.

and

turn

to

reduce

presser

When

fabrics,

of

spring

mm

The

or

O

or

the

to

Engraved

Relation

is

the

the

in

1.

2.

3.

between

determined

timing

related

the

following

Set

the

stitch

Turn

the

pointed

of

the

throat

Turn

the

by

belt

parts,

handwheel

end

hook

the

main

the

timing

from

the

you

way;

dialto"0".

of

the

plate.

driving

must

the center of No. 1 setscrew

thrust

collar

aligns

4.

Put

timing

care

not

from

to

the

shaft

with

belt

O

move

the

above-mentioned

Needle

Throat

plate

shaft

belt.

shaft

position

in

the

needle

shaftinthe

the

engraved

on

lower

hook

Engraved

and

the

If

you

for

repairoradjustment

the

timing

normal

had

O.

direction

come

normal

of the hook driving shaft

lineonthe

sprocket

driving

position.

shaft

line

hook

driving

replaceorremove

down

direction

bed.

wheel

and

belt

to

until

the

O

the

shaft

exactly

level

until

taking

main

the

of

- 5 -

20.

ADJUSTING

THE

FEED

The

be

hook

1.

2.

(CAUTION)

When adjusting

eccentric,

to

direction.

increase

TIMING

feed

fixedinphase

Loosen

set

guide.

Align

spot

eccentric

spot

driving

move

eccentric

driving

screws O

the

feed

engraved

O

0

shaft.

take

it

Becauseitmay

the

load.

shaft.

on

with

on

in

must

with

which

eccentric

marker

the

marker

the

hook

the

care

the

the

feed

feed

not

axial

21.

The

HEIGHT

'

Feed

feed

dog

dog

0.9

I j

Throat

must

mm

plate

protrude

OF

THE

its

teeth

FEED

0.9

mm

DOG

from

throat

plate surface when it has come up to the highest point of

its

trajectory.

1.

Set

the

stitch

dialto"0".

2. Turn the handwheel in the normal direction to bring the

feed dogtothe highest

point.

3. Loosen screw and adjust the height of the feed dog to

0.9

mm by moving feed

bar

slide

fork

O •

22.

TIMING
THREAD

(Starts pushing)

t

Throat

plate

TPZTTTTTT^^'

1. Raise

surfacebythe

2. Loosen screws e

release link (B) O in

the

the

tension

3

mm

presser

hand

disc

TO

TENSIONS

foot3mm

lifter.

and

adjust

the

awaytorelease

way

RELEASE

(1/8")

from

the

heightofthread

that

the link starts pushing

the

thread.

the

THE

throat

plate

tension

23.

*

Set

the

1.

Set

the

2.

Turn

the

bar

connection.

(Set

the

3. Align

4. Loosen

5.

6. Align

upper

(Set

the

the

needle

Loosen
needle0and

the

NEEDLE-TO-HOOK

o

needletohook

stitch

dialto"2".

handwheeltobring

needle bar height)

marker

hook)

three

setscrews O to set free the

bar

meets

two

setscrews O

hook

hook

blade

relationinthe

the

line O engraved on needle

the

lower

endofthe

and

blade

point

point

with

needle

adjust

0 .

the

centerofthe

RELATION

following

bartothe

bar

hook

shaft

needle

bar

the

positionofhook

needle and fix

way:

lowest

O with

gear (small).

frame.

pointofits

the

lower

endofneedle

Turn

driving saddle O

the

hook

shaft gear (small) by tightening three setscrews.

stroke

and

loosen

bar

the handwheel

to

provide

o

screw

O

which

clamps

frame ® and tighten screw Q •

until

lower

marker

line © engraved

a clearance

0.02

~0.05

mm

the

needle

between

on

24.

HOOK

NEEDLE

GUARD

25.

BOBBIN

LEVER

(Bend

hook

guard

needle

inwards)

(Bend

guard

hook

outwards)

needle

r

0.2

0.15

When a

hook
for 0.15 or 0.2 mm. Adjust it by carefully bending the

guard.

1. If

needle

2. If

needle

mm

hook

is replaced,

you

must

adjust

the

working

pointofthe

needle guard. Hook needle guard 0 must push needle O away

hook

needle

you

wanttobend

guard

you

want

guard

usingascrew

to bend it

using a

it inwards, do it from

driver.

screw

outwards,

driver.

do it from the inside of the

the

outside of the

hook
hook

- 6 -

1.

Turn

the

handwheel

bobbin case opening lever O has entirely

drawn

from

its

screw

between

working

case

0 rests in

0

0 on

2.

Turn

until

plate

3.

Loosen

clearance

and

bobbin

stopper

O.

protrusion

CASE

in

the

position..

0 in

and

providea0.2

the

bobbin

the

OPENING

normal

the

directionofthe

the

groove

case

bobbin

case.

direction

on

to

opening

arrow

throat"

0.3

until

with

mm

lever

26.

AMOUNT
TAKEN

LEVER

Reduced

Increased

OF

UP

BY

The

taken

take-up

reduced

weight

raise thread guide

Inversely,

guide O

or

are

G

specification

hasaspecial

THREAD

THE

amount

up

by

the

lever

when

fabrics

lower

when

heavy-weight

sewn.

Note

thread

of

must

are

medium

fabrics

that

machine

thread

thread

light

sewn;

O.

thread

the

guide.

be

27.

THREAD

TRIMMER

CAM

28.

(Left

1. Using

2.

3.

side)

Turn

bring

the

feed
Further
reaches

INITIAL

THE

0.4 ~

the

stitch

the

handwheel

the

needle to

dog.

turn

its

lowest

POSITION

MOVING

Aii„„

©

dial, set

the

the

in

the

centerofthe

handwheel

point.

KNIFE

Align 0

o

stitch length to

the

forward

until

OF

(Right

"0".

direction

needle hole in

the

needle

side)

to

bar

4. Loosening setscrews o and O , make adjustment

so that the edge surface of the feed dog O aligns
with O and 0 of fixed knife © .

5. Loosen rocker arm clamp screw 0 .

6.

Turn

cam follower 0 in

cam roller shaft 0 comes in

the

directionofarrow

the

contact with

stopper 0 .

7. Tighten rocker arm clamp screw 0 when the top

endofmoving knife 0 protrudes

from

8.

Turn

several

performas its

O and ©offixed

the

handwheel,

times

and

action

knife

let

the

make

sure

as adjusted.

(CAUTION) Be suretocomplete

fixed knife

before

positioning

the

thread

0.4

0 .

trimmer

that

the

moving

the

positioning of

moving knife.

to 1.2 mm

operate

knife

the

1.

Loosen

2. Align

3.

Push

thread

4.

Turn

axisofthe

pressing

29.

two

screws

red

marker

O

on

the

machine

cam

follower 0

trimmer

the

thread

the

thread trimmer camofthrust collar 0 .

HEIGHT

1

^0r

✓WiSU/1

cam

spot

cam.

trimmer

roller

P

® \ \ ^

0

1.

Remove

2.

Loosen
Loosen

3.

4. Adjust moving knife

moving knife 0 to

30.

ftxed

knifeOfrom

screws 0toset
screw O

which

ADJUSTMENT

OF

THE

0

which

0

arm.

to

let

cam

and

OF

free

clamps

link

touch

moving knife rest

CLAMP

set

on

the

cam

until

fix

THE

hook

the

the

0 in

the

thread

handwheel

roller

its

marker

the

thread

MOVING

shaft

moving

rocker

the

OF

SPRING

trimmer

0 restinthe

trimmer

spot

with

0 aligns

cam

O

red

marker

grooveonthe

with

camasyou

KNIFE

saddle

0.

knife

shaft

thrust

collar.

arm.

vertical directiontopermit

0.

THE

Tighten screw

PRESSURE

Lightly

0

touch

0.

spot

the

are

31.

HOW

THE

TO

FIXED

RESHARPEN

KNIFE

As

soon

as

trimmer

dull, resharpen

knife

an

oUstone.

knife

as

illustrated

the

the

thread

becomes

fixed

using

1. Loosen screw O .

2. Screw in adjusting screw 0 until adjusting metal fittings 0 lightly

touches the clamp spring O

3. After adjustment, securely tighten screw O to fix adjusting metal

Fixed

Oilstone

knife

nttings

(CAUTION)

- 7 -

0 .

Be careful not to overtighten adjusting screw 0 , or else

and

excessive spring pressure will result and inferior

ing

may

often

occur.

damp

32.

1.

2.

POSITION

Align

red markerspot ®

Move

red0in

the

engraved

arrowed

between the needle and wiper O .

OF

direction

THE

WIPER

Needle

2

mm

on the arm \vith white marker spot 0

and

perform

adjustment

using

engraved

adjusting

on the handwheel.

screw0so

thataclearance

of2mmis

provided

33.

REVERSE

o

34.

TABLE OF

FEED

©

©

SWITCH

*

Howtouse

1. Depress
the

runinthe

2. Reverse

as

switch

3.

Release

forward

A

Heightofthe

Adjust
lever

Loosen

heightasdesired.

switch

machine

reverse

stitchismadeaslong

you

keep

lever.

the

sewing.

the

height

for

your

screw

LEVER

lever

will

immediately

direction.

depressing

switch

switch

of

and

the

adjust

convenience.

0

O,

lever

and

the

lever

switch

the

0

for

0

O

*

Positionofthe

1.

Set

the

stitch

reverse

dialtothe

feed

maximum

solenoid

value.

2. Loosen screws O which fix the solenoid in place.

3. Depress rererse feed control lever 0 fully downwards,

provide a 0.5 to 1.0 mm

(1/64"to3/64")

e

clearance

between solenoid 0 and rubber packing 0 on the
plunger by moving solenoid bracket 0 up and down

and

tighten

screws

0 .

SEWING

SPEED

FOR NEEDLE

GAUGES

Specification

S

G

A

C

(Notes)

The

You

above

sewing

are

requestedtodetermineanoptimum

Needle

1/8"~3/8"

7/16"-3/4"

7/8"

- 1-1/4"

3/16"-3/8"

7/16"-3/4"

7/8"-

1-1/4"

3/32"-3/8"

7/16"-3/4"

7/8"

- 1-1/4"

3/32" -

1/4"

speed

are

gauge

(3.2~9.5mm)

(11.1 -

19.1mm)

(22.2-31.8mm)

(4.8-9.5mm)

(11.1-19.1mm)

(22.2-31.8mm)

(2.4-9.5

(11.1-19.1mm)

(22.2-31.8mm)

(2.4 - 6.4 mm)

AO

-TjV/w

Ot^.Jll.Wiiwil

based

onthe

mm)

jfUtIoCW

average

speed

Stitch

4mm

4mm

4 -

4mm

4 -

4mm

4 —

4mm

4mm

Uwllilil

sewing

XlCaVlCl

conditions.

dependingonthe

- 8 -

length

6mm

6mm

6mm

lllcill

kindsofmaterials

Sewing

4,500

3,800

3,500

»4,500

4,000

3,800

3,500

3,500

3,200
4,000
3,500

3,200

3,000

speed

s.p.m.

and

(Max.)

sewing

Sewing

process.

speed

4,000

3,500
3,200

4,000

3,800
3,500

3,200

3,200

3,000

3,800
3,200
3,000

2,800

(normal)

s.p.m.

35.

*

Needle

GAUGE

Tableofgauge

gauge

inch

mm

sets

(For

long

SETS

4mm

stitch)

Throat

plate

2 Q

(For

"C

specification)

(For

long

6mm

stitch)

Feed

dog

Needle

clamp

IX

31.8

S"specification

A

specification

G

specification

C

specification

Needle

gauge

Presser

(Forked

foot

top)

('Locomobile^

^forked

topJ

ir

(Needle

#11~#20)

(Swivel-guide)

2.0mm

2.0mm

•(r (Needle

u u

#18-#22)

Common

all

specifica-

(No

differ-

to

a> 4>

★

Standard

^

Commontoall

specifications

needle

gauges •

Non-standard

Non-forked

specifications * Specially

top

_ 9 _

manufactured

upon

Commontoall

(No

difference)

request

specifications

36.

WINDING THE BOBBINS (TWIN BOBBIN WINDER)

1 Take the thread end from a thread spool, pass it through the thread guides

Q , @ and @ in that order for an inside bobbin or the thread guides

11

(D,(i

the

2. Tilt bobbin presser Q permitting the thread winder pulley to touch the

running

3. Adjust screw O to wind a bobbin about 80% of its capacity; turn the

adjusting screw clockwise to increase or counterclockwise to reduce the

amount

4. If the bobbin is wound unevenly,move tension bracket O or O to the left

or

the

5. When the bobbin is filled up, the bobbin presser automatically releases

thread

and for an outside bobbin and

bobbin.

belt.

of

threadtobe

right so

winder

that

pulley

wound.

the

bobbiniswound

from

the

running

evenly.

belt.

CSPEGIAL

winditseveral

ORDER]

turns round

the

37.

TURNING

ON/OFF

THE

SWITCHES

IN

THE

CPU

BOX

(1152-5)

a

Depress

p p rn

il

2 3 4 5 6

Insert a small flat-bit screwdriver into P and depress it in the direction of the arrow to remove CPU control panel cover O , and

DIP

switches

automatic

(Importat

For

more

38.

When sewing heavy-weight material, if the motor clutch produces loud noise while sewing at low speed, change the setting of DIP

switch 2 O

This

reduces

^III

VI I

1 to 8

(for

MC-210) or 1 to 6

reverse

feed

'.)

Be sure to turn the power switch

switch

detail,

stitching

cannotbechanged.

refertothe

TURNING

\

11

mounted

the

11

II

II

II

\ f

on the circuit

clutch

noise,

I —imz

I

lijfl

I

I

I I///A *

rm

timingatsewing

MC-210orMC-1 10

ON/OFF

withanapprox,

I V

V'

THE

board

in the PSC box to

(for

MC-110) will

start

and

OFF

before turning a DIP switch ON or

Instruction

SWITCHES

20%

reductioninthe

f

f—

—I

oj

rn

^

cn m detail, refer to the MC210 or

become

prevent

^ 2.

needle

Book.

"ON".

low sewing speed.

0

3.

(Important)Besuretoturn

tion

accessible.

breakage.

IN

THE

Turn

the

Open

the

Turn

DIP

Book.

Turn

DIP

switch

OFF,

or else the function of the DIP

PSC

power

PSC

box

switch2OON.

before

else

changed.

BOX

switch

OFF.

cover.

turningaDIP

the

functionofthe

3 Q ON to

the

(1152-5)

power

switchONor

DIP

MC-110

|-|

compensate

switch

OFF,

switch

cannot

Instruc-

the

OFF

or

39.

PEDAL

r

PRESSURE

--r'

AND

STROKE

*

Adjusting

The forward pedaling pressure can be adjusted by hooking adjusting

spring O on the right or left side. When the spring is hooked on the

left side, the pedal resistance reduces. When it is

side

the

* Adjusting

This can be achieved by adjusting screw Q . When the adjusting

screwistightened,

the

pedal

*

Adjusting

When

the

strokeisreduced.

-

10

(LH-1152-5)

the

forward

pedal

resistance

the

backward pedaling (heel down) pressure

the

resistance

connecting

-

reduces.

the

forward

rod @ is

increases.

pedal

pedaling

pedaling

resistance

inserted

(toe

down)

increases. When it is

stroke

into

the hole on

pressure

hooked

on the right

loosened,

the

left side,

40.

TROUBLES

AND

CORRECTIVE

MEASURES

TROUBLES

1

Thread

(Threadisuntwisted

or

(Needle

mm

the

fabric.)

2

Stitch

3

Loose

4

Thread

the
thread

action.

5

Thread

the

startofstitching.

6

Threadisnot

sharply.

7

Threadisnot

8

Needle

comer.

scraped)

thread20to

(approx.

wrong

needle

needle

at

all.

the

wrong

fabric

breakage

1")isleft

sideofthe

skipping

stitch.

escapes

trimming

escapes

eyeatthe

thread

sideofthe

when

eye

sewing

from

after

from

cut

cut

shows

30

CAUSES

® There isa sharp edgesor burrs on the thread

path,

needle

point,

hook

bobbin

plate.

case

resting

(2) Needle thread tension is

blade

grooveonthe

too

high.

(3) Bobbin case opening lever provides an

excessive

clearance

at

the

bobbin

@ Hook blade point hits the needle.

(D Hook is not lubricated properly.

®

on

Needle

d) Threadtake-up springistoo tight andits

strokeistoo

thread

tensionistoo

small.

low

(D Needle-to-hook relation is wrong.

(D

The

thread

twistismoved.

(D Clearance

blade

between

pointistoo

the

great.

needle

(D Needle-to-hook relation is wrong.

d) Pressingforce of the presser foot is not

enough.

®

Needle

(5) Hook needle guard is

® Needles are a
®

The

(D Bobbin

d)

thread

forked

bobbin

Thread

bar heightis

little

twistismoved.

thread

endofthe

does

case.

path

has rough surface.

wrong.

not

too

not

tension

functional.

thin.

pass

through

springonthe

d) Bobbin does not spin smoothly.

® Bobbin case opening lever provides too much

®

®

clearance

Bobbin

Bobbin

at

the

thread

bobbin.

tensionistoo

threadiswound

too

low.

tightly.

(D Thread tension given by the tension post

No.

1 is

too

high.

@ Timing of the thread trimming action is too

early.

®

The

needle

thread

threadiscaughtbythe

catching groove on

the

(D Thread tension given by the tension post

No.

1 is

too

high.

® Pressure of the clamp spring is too low.
@ Position of the clamp spring is wrong.

® Needle hole in the presser foot is too large

comparedtothe

®

Bobbin

thread

stitch

length.

tensionistoo

low.

(f) The needle thread is caught by the bobbin

thread

catching

grooveonthe

® Position of the moving knife to the fixed

knifeiswrong.

® Thread trimmer knife is chipped or worn.

® Moving knife tilts wrongly.

® Initial position of the moving knife is

wrong.

@ Moving knife does

bladeofthe

fixed

not

come back to the

knife.

@ Timing of the thread trimming action is

wrong.

on

®

Thread

a

is

tension

release

working a little early

operated.

components

when

the

point

or

throat

case.

and

the

hook

the

bobbin

moving knife.

moving

knife.

start

knee

lifter

CORRECTIVE

o

Remove

sandpaper.

case

resting

a

buffing

0

Adjust

o

o

o

o

o

o

oItis

o

the

See25and

Adjust

the

accordingto23.
Increase

hook

accordingto2.

Adjust

the

Reduce

increase

Adjust

accordingto23.

Adjust

the

the

wound

the

sharp

wheel.

needle

needle-to-hook

the

needle

the

MEASURES

edgesorburrs

Polish

the

grooveonthe

adjust

amount

surfaceofthe

thread
the

clearance.

oil

thread

tensionofthe

stroke,

needle-to-hook

onto

the

needle.

needle-to-hook

usingafine

throat

plate

tension,

relation

suppliedtothe

tension,

spring

and

relation

relation

bobbin

using

accordingto23.

o

Adjust

the

accordingto23.

o

Tighten

o

Adjust

the

accordingto23.

o

Adjust

the

guard

o

oItis

o

o
o

o

o

o

o

o

o

accordingto24.

Replace

wound

Thread

the

Remove

or

polish

Replace

Adjust

the

accordingto25.

Adjust

the

Adjust

the

thread

winder.

Loosen

Adjust

to

Adjust
knife

Loosen

tension

the

27.

the

accordingto28.

the

needle-to-hook

the

presser

needle-to-hook

positionofthe

the

needlesbythicker

onto

the

bobbin

rough

surface

the

surface using a

the

bobbinorthe

bobbin

bobbin

tension

case

thread

componentsonthe

post

thread

trimmer

initial

positionofthe

tension

relation

spring

regulator.

relation

hook

needle.

case

correctly.

usingafine

buffing

hook,

opening

tension,

No.Islightly.

cam

post

No.

1 slightly.

needle

ones,

sandpaper

wheel,

lever

according

moving

o Adjust the clamp spring pressure or replace

o

Adjust

the

accordingto30.

positionofthe

0 Replace

needle

o

Increase

o

Adjust

knife

Adjust

o

clamp

o

Resharpenorreplace

o Adjust

o

Adjust

knife

o

Adjust

to

o

Adjust

to

o

Adjust

release

the

hole,

the

the

initial

accordingto28.

the

positionofthe

spring

the

moving knife according to

the

initial

accordingto28.

the

the

thread

thread

27.

27.

the

timingofthe

action

presser

bobbin

positionofthe

accordingto28,29and

positionofthe

trimmer

trimmer

accordingto22.

clamp spring

foot

having a smaller

thread

tension,

moving

the

knife

cam

cam

•'

•*

•

thread

moving

knife

blade,

moving

according

according

tension

and

30.

29.

it.

-

11

-

41.

AUTOMATIC

PRESSER

FOOT

LIFTER,

AK-II

(optional

attachment)

The automatic

heighest

.—..

-

f^l

position

•—

presser

foot lifter

for60seconds

AK-11

after

I I

is an optional attachment which is capableof lifting the presserfoot and holdingit at the

thread

trimming

has

been

made.

—I

^ .. . 1.

\ n * ~ — 2.

J^i

cU

' l' I 3.

''

*

Presser

by

Push

Loosen
Lower

loosening

•(7 ^

Knee

switch—•/

Ml

^1

*

Operation

*

Operation

If
If

you

If

you

r \ . • • ,

foot

foot

the knee switch. Such

the

presser

presser

^ . j- » 1 ft th ' - ^ I and the

own la ey a er e g loosen the nut of

down

nee

knee

.

wanttoraise

wanttoraise

duringasewing

duringasewing

knee

switch.

. ^ .

foot

foot

immediately

swi

c isre

switchisreleased.

n\

n ^ ^ ^ \ \

l L=

<=

J/^

<=r-<5y

the

the

work,

work,

Such

will

be

will be

after

ease

.

-=.

comming

comming

c V /r^ 1

<=

presser

presser

press

press

raised

raised

the

<=

/^

\(^)

n(i(W^ 5.

^[dLfM\

\\IlU

\\

\\

\\

your

hand

the

top

end/of

machine

each

lock

head

nut.

W V o-

/ri\

Nv

I®\S4\ 1

w\\p

/^iWb

and

the

knee

becomeabout 1 mm (3/64"). After obtaining aproper position, retighten

increasedbya

decreasedbya

(The

presser

Raise

K ^

rn »u u

1

W i

stopper

adjust

(B)O >

the

lifter

height

rod

push

of the

and

reservoirbyactivating

Raise

another

switch

t'

7.

Tighten

the

stopper

the

knee

u*

j

presser

foot

lifter

locknut O of the

presser

the

foot stopper (A)0

the

lock

knee

switchtodrive

adjust

the

rotating

solenoid;

clockwise

maximum

footisabout8mm

stopper

the

'

.v

(B)sothat the

lifter

counterlockwise

stroke

(A)

stopper

ir..

half

turn

♦!.

i i *<•*i.

the

lock

i »• .

coupler

lifter

lever

connecting

respectively.

f- i • »u i

after

nutsofthe

stroke

coupler.

nut.

the

strokeofthe

plunger

untilithits

the

(A),

towards

rod

@ on the

the

stroke

turn

performedbythe

releasing

clearance

turn.

(5/16")).

solenoid

by

rotating

♦

stopper

the

located

fully

sole-

presser

is

and

is

the oil

it

the

knee

/•a\

(A)

solenoid

between

on

the

42.

1. Use

2.

The

isasfollows.

Outer

dia

meterofthe

motor

pully,

(Note)

The

pullys

subtracting5mm

MOTOR

Type-MVbelt.

relation

between

Part

motor

MTS-POIOOOAO

MTS-P00950AO

No.

pully

PULLEY

the

of

motor

pully, belt length

Revolution

4,250s.p.m.l

4,000

3,820 I

MTS-P00850AO 3,610 4,320

MTS-P00800A0 3,390 4,000

MTS-POQ750A0

3.160 3,790

MTS-P00700A0 2,950 3.520

MTS-P00650A0

MTS-P00600A0

MTS-P00550A0

holesinthe

cannot

2,740

2,530

2.320 2,780

motor

be

used.

from

tbe

pully

The

outer

are

effective

AND

4.540s.p.m.

3,280

3,030

tapered.

diameter.

V-BELT

Therefore,

motor

and

sewing machine revolution

Part

No.ofbelt

MTJ

-VM004300

ImTJ

-VM004200

;MTJ

-VM004100

I

MTJ

-VM004000

commercially

pully

diameterIsobtained

available

by

(HowtoInstall)

O O 0 0

Remove pulley cover O . and install

motor

pulley 0 on the

fittingitinto

spring washer 0 to them, and tight

en

nut

O , using a wrench.

To remove motor pulley 0 . take off

the pulley cover, and reverse
stalling
advisable to use a gear puller

J1065000000),

extra

pulley,

(Caution)

procedure

cost,toeasy

the

which

When

removing

pulley,

hard

withahammer

like,

or

damaged.

motor

key way.

stated

above. It is

is

available

remove

do

not

elseitmay

shaft,

Attach

the

(Part

No.

the

motor

the

motor

hitIttoo

or

the

in

be

at

-c-

f

Please

do not hesitateto contact ourdistributorsor

inyour areafor furtherinformations when

•

Appear

TOKYO

Head Office & Plant: 2-1, 8-chome, Kokuryo-cho, Chofu-shi, Tokyo, Japan

BusinessOffice: 23-3, Kabuki-cho 1<home, Shinjuku-ku. Tokyo 160, Japan

Cable:

JUKI

Phone:

and

specification

03(205)1188,1189,1190

JUKI

TOKYO

listedinthis

IKOUSTRIAl

Telex:

J22967,

instruction

232-2301

book

are

subjectedtochange

CO..

ITO.

without

notice.

agents

necessary.

1986.3PrintedinJapan