Juki DDL-555-4, DLN-415-4, DLU-450-4, DLD-432-4 Instruction Manual

BE5554T0B0A

Model

DDL-555-4

High

Speed

industrial

Automatic

Model

DLN-415-4

High
Lockstitch
Equipped

Model

OLU-450-4

High
Feed

with

Model

DLD-432-4

High

Feed

with Automatic Thread Trimmer

Single

Sewing Machine

Thread

Speed

Single

Industrial

with

Speed

Single

Industrial

Automatic

Speed

Single

Lockstitch

Needle

Trimmer

Needle

Sewing

Automatic

Needle

Sewing

Thread

Needle

Industrial

Lockstitch

Equipped

Feed

Machine

Thread

Top

Machine

Trimmer

Differential

Sewing

Trimmer

and

Bottom

Equipped

Machine

with

Instruction

0

Book

TOKYO

JUKI

INDUSTRIAL

CO..LTD.

This INSTRUCTION BOOK is compiled for JUKI models DDL-555-4, DLN-415-4, DLU-450-4

and

DLD-432-4

like DDL-555, DLN-4I5, DLU-450 and DLD-432. Since the basic principle of operation and

adjustment are entirely same as those of mother models, please refer to the separate INSTRUC

TION BOOK prepared for them as well.
Please do

questions

I.

SETTING

1. Installation of the machine head 1

Z

3. Installing and adjusting the pedal -

4.

5.

6.

II.

HOW

1. General instruction 6

2. Lubrication and the amount of oil 6

3.

4. How to operate the pedal 6

5.

6. Automatic counter-back stitching 9

7.

8.

9.

10.

11.

12.

13. Howto selectthe

14.

15.

16. The

17.

18.

19.

20. Howto installand

III.

HOWTOADJUST

1.

2.

IV.

HOWTOUSE

1.

2.

3.

V.

AUTOMATIC

1.

2.

VI.

SPECIAL'SWITCH

DIAGRAM

VII.

VIII. DIMENSIONAL DIAGRAMOF THE TABLE (TOP SURFACE) 24

which are equipped with the automatic thread trimmers to their mother models

not

hesitate to

or details.

UPTHE

Motor

pulley

Installing
Connecting
Confirming

TO OPERATETHE

Checking

Adjusting

Passing

the

Adjusting

Adjusting

Adjusting
Sharpening

Importantnotes '3

Adjusting
Adjusting

floating

Changing

Adjusting

Adjusting

Adjusting
Adjusting

Forming

Adjusting

Adjusting

Howtooperate

Adjusting

SHOWING

contact

with our agent in your area or our main business for further

CONTENTS

MACHINE

andbelt 1

the

synchronizer
thecords ^
the

operating

the

pedal

the pedal

needle

the thread

the

lengthofthread

the

needle

thecounter

the

timing

the

position

range

the

moving

the

bobbin

the

slide

THE

the

positionofthe

the

positionofthe

AND

ADJUST

the

switch-back

the

position

the

reverse

PRESSER

voltage

MACHINE

action

pressure

thread 10

andstroke 8

tension

stop

remaining

position

after

onthe

thread

needle

trimming

after

thread

trimming

knife

presser

foot, throat plate,

of the

thread

of the

of the

second

knife 17

thread

shaft

remove

WIPER

timming

moving

thread

presser

the knife

knife

tension

installing

sewing

hookandfeeddog 14

cam

di.sc

base 19

wiper
wiper

THE

magnet

SWITCH-BACK

BUTTON

stitches

ofthe

switch-back

stitch

FOOTLIFTER,

length

lever

AK-2

AK-2

the

presser

foot

TO HOLDTHE NEEDLE ATTHI-TOP

stroke

METHODOFASSEMBLING

POSITION

TABLE 23

....

I

3

5

6

6

•0

II
12
'3

14
15

17

18

19

20

20
20

21

21

21

21

22

22

22

22

I.

SETTING

1.

Installationofthe

Not

only

table in the same way as

Instruction

Z

Motor

The maximum sewingspeed of the

and DLD-432-4 is

the

machine

Book

pulley

UP

for

and

4,200

THE

MACHINE

machine

head

but

also

that

model

of the general lockstitch machines. Please refer to the separate

DDL-555, DLN-415,

belt

s.p.m.

head

the

DDL-555-4

oil reservoir

DLU-450

Set up
by

shown in the illustration. Do

lock

of

and,

and

the

or DLD-432.

the

making

nut

too

the table

DLN-415-4

bobbin

winder

spool

standonthe

useofthe

much,orthe

top

will be cracked.

installation

is 5,000 s.p.m. and

are

installedonthe

machine

not

tighten the

laminated

DLU-450-4

table

hole

surface

You must use the M-type V-belt

The under mentioned table indicates the maximum sewingspeeds related to the motor pulleys

and the length of belts. The effective diameter of the motor

5mm(13/64")

Outer

diameter

motor

pulley

125mm

115

105

100

95

90
85
80

75

from

of

MTS-P01200A0

MTS-POllOOAO
MTS-POIOOOAO

MTS-P00950AO

MTS-P00900A0
MTS-P00850A0

MTS-P00800A0
MTS-P00750AO
MTS-P00700A0

the

Motor

Part

outer

pulley

No.

diameter.

50

5,060

4,630
4,250

4,000

3,820
3,610
3,390

3,160

Sewing speed

Hz

s.p.m.

5,040

4,540
4,320
4,000

3,790
3,520

pulley

is obtained by deducting

Belt

60

Hz

length

43"

Belt

Part

No.

MTJ-VM004300

s.p.m.

42"

MTJ-VM004200

41"

MTJ-VM004100

(Note) The center hole on the motor pulley is tapered, and the normal pulleys commercially

availableinthe

market

can

notbeused

for

these

machines.

If the belt is too long,the connecting rod may not work smoothly.

as

- 1 -

3. Installing and adjusting

Motor

the

pedal

regulating

lever

1)

Howtoattach

After

pedal were

connecting

of the connecting bar by sliding the con
necting bar positioner.

Connecting

bar

posj

tloner

2) How to adjust the pedal angle

You can adjust the pedal angle by chang

ing the effective length of the connecting

bar. Loosen the clamp screw and change
the effective length of the connecting bar.

the

connecting

the

motor

regulating lever

connectedbymeansofthe

bar, adjust

the

vertical position

bar

and

the

ft

- 2 -

4. Installing

the

synchronizer

The necessary instruction for installation is indicated on the packing case on

SHITA"

(CAUTIONS)

and

"HITACHI"

Cord

motors.

Nylon

\\\

Support

rod

clamper

\\ \

"MATSUSHITA"

Screw

the

support

locatedonthe

wheel

side

Fix

the

of

the nylon clamper so

contact

right looking from the hand-

and

fixitwithalock

cord

onto

with

the

V-belt.

motors

rod

the

into

support

both

of "MATSU

the

threaded

nut.

rodbymeans

that

it does

hole

not

Printed

Magnet

circuit

board

Stater

Rotor

- 3 -

"HITACHI"

Be

careful

statertocontact

The

clearance

board

cover

Pass

the

cord

chronizer

so

cover

thatitdoes

motors

nottoallow

with

each

between

and

the

rotor

through

and

fix it

not

contact

the

rotor

other.

the

printed

magnet

the

insideofthe syn

with

the

with

the

and

the

circuit

is I to 2mm.

cord

clamp

V-belt.

5y

Connecting

Before starting to connect the cords, make sure that the power source is

cord

with care

the

cords

nottoletittouch

the

motor

pulley, V-belt or any

other

cutout

moving parts.

Connect each

Whileyou are connectingeach plug, make sure that the plug is firmly secured in the receptacle by

trying to pull it lightly.

(1)isthe

power

supply

cord.

(2) is the cord for the magnetic clutch brake which is pre-connected with 4-pole connector

(HITACHI) or 3-pole connector (MATSUSHITA).

(3) is the cord for controlling the knee lifter (2-pole connector). Only for AK-2.
(4) is the cord to the selector switch for controlling the count-back stitching (with 3-pole plug

for HITACHI, 6-pole plug for MATSUSHITA).

(5) is the cord to the wiper and the control lever for switch-back stitching (with 6-pole connec

tor). Pass the cord through the opposite side of the motor pulley via the hook beneath the

table

and

plug

in.

(6) is the cord for driving the thread trimmer solenoid and the automatic reversefeed solenoid,

(with

4-pole

connector).

(7) is

the

cordtodrive the solenoid for

Only

for

AK-2.

(8) is the cord to the synchronizer, (with 12-pole connector

for

MATSUSHITA).

(9) is the pre-connected cord to the controller. (3-pole connector).

HITACHI

the

automatic

lifter (with 4-pole connector).

for

HITACHI and 8-pole connector

UUKI

- 4 -

(MATSUSHITA)

6. Confirming the operating voltage

(HITACHI)

.

aJUBCI

' KEfOlC

wttt

rnw

I^OSITIOKCA

iKDWiei

itni

wto«

•«

UM-«

Check your operating voltage with the rated

voltage, Hz., and phase specified by the ma

chine

If the

voltage,

control

plateofeach

motor

not

circuits may be

motor.

is operated with a different

only

the

motor

itself

but

broken,

also

please note.

the

(MATSUSHITA)

PANA

enam

Eucrmc

SER.Na

200

60

200l£3450

iwwsTim

STOPE,

rating

type

FORM TSAI ROTOR

LAMP6V20W

400w2poUSO

V7I-I0M

masusHnA

1.7

288^

caiin

CONT.

C

cooeO

H
G

- 5

II. HOW

1.

General

After

hand,

watching

from the open side of the handwheel.

If you fail to judge it, you can repeat to

found.

o Clean up the installed machine.

o

Before

DDL-555,

oDonot

oDonot

machine

after the first 1 month has passed,

o Keep awayfrom the needledropping placewhen you switch the machine on.

o Do not fail to switch off the machine before you tilt the machine head backwards for lubrica

tionor

will

motor

o Whenyou move the machine to other places, to not hold it with the cover located on the rear

of

o

Even

ed on or the thread is trimmed, the needle would not come down or the thread trimmer would

not

forwards (toe-down).

2.

Lubrication

Beforestarting to operate the

JUKI

TION

3. Checking

o Firstly, check your machine without passingthe threads.

o

Switch

Even

by switching on the machine,

o When you switch on the machine, do not put your hand under the needle.

4. Howtooperate

As

the

(1) Placeyour feet gently on the pedal at the stop position.

(The needle is held at the lowest position).

(2) Tread on the pedal lightly forwards (toe-down), and the machine starts to rotate at a low

speed.

(3)

Treadonthe

gradually

the switch for the counter-back stitching is turned on, the machine will attain it's maximum

sewing

the

TO

OPERATE

instruction

the

machine

switchonthe

the

has

been

machineontril

rotationofthe

startingtooperate

DLN-415,

drive

replace

at a

DLU-450orDLD-432.

the

machine

the

motor

higher

speed

clearingorremoving

be stopped immediately by

assembly.)

the

handwheel.

if you tread on the pedalbackwards (heel-down) immediatelyafter the machineisswitch

work.

Such thread

and

amountofoil

industrial

BOOK.

the

following

pedal

on the

needle

speed

lubricating

the

pedal action

machine,

staying

the

illustration

pedal

and

attain

only after the

fully.

further

the

set

handwheel.

the

before

pulley

depending

the

trimming

machine,

oil.

Refer

and the

at a

lower

pedal

shows,

maximum

THE

MACHINE

up,

bring

down

and

check

The

machine,

theoil

V-belt.

means

needle

forwards

count-back

read

reservoirisfilled

withalarger

on the

(If

of the built-in safety

motion is

fillthe oil

to the

will

position

the pedalof this

(toe-down),

speed

the

needlebyrotating

that

the

motor

handwheel

switch

on and off the

through

the

one

within

necessityofsewing

you

mistakenly

performed

corresponding

beheldat it's

willbebrought

whenithas

stitch has

only after the pedalhasbeentrod once

reservoir

model

and

been

the

handwheel

rotatesinthe

must

rotate

machine

separate

with

the

lubricating

first1month.

works

tread

onthe

device

up to the "HIGH" marked

paragraph

highest

position

upand

isoperatedin4

the

machine

been

trod

formed,

correct

counterclockwise

until the direction is

INSTRUCTION

oil.

You

and

operator's

pedal,

separate

without

at the

stages.

will

fully.

though

the

increase

in the caseof "HITACHI"

in the

held

down

even

with

direction

watching

BOOK

may

operate

motor

level

INSTRUC

fail.

highest

it's

However,

you tread on

your

the

ability

pulley

with

position

speed

when

by

of

- 6

High

Low

speed

speed

©

Stop

Thread

(needle

trimming

down)

o You can obtain the normal performance of thread trimming by treading on the pedal back

wards (heel-down) directly from the high or low speed position,

o You can

tread

back

the pedaltothe

neutral

position

immediately

after

the

nachine

has

started

to perform the thread trimming action. The thread trimming action is automatically completed

not

and you do

need to keep the pedal at the thread trimming position any longer,
o When the machine stops, the needle will be held at the lower position.
o When you

want

to bring up the needle, tread on the pedal fully backwards (heel-down) once.

Then, the machine will perform a thread trimming action and will bring up the needle and hold

at

it's

highest position.

(Note)

In

some

cases,

the

machine

with

"MATSUSHITA"

motor,

does

not

starttorun

immediately

after

a thread trimming action was made even though the pedal is trod forwards (toe-down). This is

simply because

tread

case,

the

machine.

In tlie

caseofthe

the

machine is

on the pedal

machine

locked

backtothe

with

"HITACHI"

by the

neutral

safety

position

motor,

device

built

in tlic

motor

assembly. In such a

once

and tread on it again forwards to drive

such

safety

device is

automatically

released

after a thread trimming action has been completed.

- 7

5. Adjusting the pedal pressure and stroke

(MATSUSHITA)

Pedal

pressure

spring

1) Adjustment of the forward pressure

Adjust the forward pressure by changing

the position of the spring.

"HITACHI"

motor:

The pressure is reduced by moving the

spring to the left and is increased to the

right.

"MATSUSHITA"

motor:

The pressure is reduced by moving the

.spring

to the right and is increased to the

left.

Adjustment

Adjustment

nutofthe

backward

pressure

spring.

(MATSUSHITA)

grooves

(HITACHI)

Connecting

-—(upper)

(HITACHI)

I

rod

2) Adjustment of the backward pre.ssure

"HITACHI"

motor:

The backward pressure can be adjusted by

means of the adjustment nut of the back

ward pressure spring. The pressure is in

creased by tightening the

reduced by loosening.

.spring

3) Adjustment of the pedal stroke
The pedal stroke can be adjusted by

changing the connectionofthe upper

connecting rod with the motor regulating

lever.

"HITACHI"

The

rod

with

increased by the right

"MATSUSHITA"

The

motor:

.stroke is reduced by

the

left

hand

sideofthe

hand

motor:

stroke

is reduced by

connecting

lever

side.

connecting

rod with the riglit hand side of the lever

and is increased by the

left

hand

side.

and

the

and

the

- 8

6. Automatic count-back stitching

You

can

form

the

without

operationofthe feed

BACK

START

ENDdTO)

•JUKI

count-back

Count-back

at

'

Count-back

at

TAC

SW.

(»i^)

stitches

control

the

the

stitch

start.

stitch

end.

TTsr

Selector

formingacount-

back
startofa

Selector

formingacount-

back

endofa

switch

stitchatthe

seam

switch

stitchatthe

seam

J

at thestart

and/or

theend of a

leverorswitch-back lever.

1) You can preset the machine to form the

count-back

endofthe

selector

2)Ifthe

enough for your sewing purpose, turn

the

selector

sary lengthofreverse

making usofthe reverse feed

or

the

switch-back

3)

When

turned
automatically

ately by treading on the pedal backwards

before or after forming the count-back

stitchatthe

for

iine.

for

line.

though you tread on the pedal for thread

trimming while the count-back stitch is

being formed, the thread trimming action

will

not

tionofthe

4)

When

the

turned on, the thread trimming action will

be

performed

has

been

If you tread on the pedal for thread trim

ming while the machine is forming a

count-back

line,

the

after completing the said count-back stitch.

seam

line

automatically

stitchesatthe

seam line by

switches.

numberofcount-back

switch

and

stitches

start

meansofthe

stitchisnot

produce

manually by

and/or

the

control

lever.

the

selector

on,

you

can

trim

startofa

switch

off

let

the

for

the

thread

seam

"Start"

machine

immedi

line.

be performed prior to the forma

said

count-back

selector

after

formedatthe

stitchatthe

machine

will

switch

the

endofa

trim

stitch.

for

"End"

count-back

seam

endofa

off

the

thread

the

off

neces

lever

is

to

Even

is

stitch

line.

seam

- 9 -

7. Passing

(D

the

needle thread

(D

©

(4)

oIfthe

machine

stops

ing the needle at a lower
position, tread on the pedal

backwards
an idle

before passing

thread.

thread

Then,

for

performing

the

the

trimming

will go up and stay at
highest position,

o

Pass

the

needle

thread

the order fromCDto © as

showninthe

illustration.

leav

needle

needle

the

in

©

8. Adjusting

Tension

decreased

the

thread tension

Tension

increased

(The

length

remaining on

adjustable with the disc.)

Tension

\

increased

Thread

disc

Tension

decreased

(The

is

adjusted

this

Thread

disc

No.2.

thread

disc.)

No.1

of a

the

tension

tension

thread

needle is

tension

with

©

Refertothe

ately prepared for the model DDL-555,

415, DLU-450 or DLD-432 for the method of

thread tension adjustment excepting the fol

lowing points;

1) Adjustment of the thread tension spring.

If the thread tension spring of

chine

or synthetic fiber thread like
Nylon thread has an excessive tension or
stroke, it may produce some skipped

stitchedatthe

cordingly the thread may not be trimmed

off

INSTRUCTION

whichisthreaded

endofa

normally.

withathin

seam

BOOK

Tetoron

line

your

separ

DLN-

cotton

and

ma

or

ac

-

10

-

2)

Adjustment

of the thread tension disc

No.l

o o The length of a thread remainingon the needle is shortened by increasingthe tension of the

disc No.1 and is lengthened by decreasing the said tension,

o

Wlien

you use a thin thread (like a synthetic thread), reduce the tension properly. On the

other

hand,

when

you

use a

thick

thread, increase the tension.

3)

Adjustmentofthe

o The methodof adjustmentis
o If you reduce the

thread

tension

tension

disc

No.2

same

as that of

normal

too much,it maycausea thread

lockstitch

breakage

sewing

at the start of

machines,

sewing.

9. Adjusting the length of thread remaining on the needleafter trimming

o The length of the thread remaining on the needle after the thread trimmer has worked is

closely related with the

from

judge it

a floated needle thread or

o You can adjust the length of remainingthread by means of the thread tension disc No.1.

o It is

possibletochange

threads,if

necessary.

correct

formation of stitchesatthe

bobbin

threadatthe

the

timing

of the thread

Please

consult it with our agentor our main businessoffice.

trimming

startofa seam line.

start

between

You

of a seam line,

the cotton andsynthetic

can

-

11

-

10. Adjusting

the

needle

stop

position

after

thread

trimming

You can adjust the position at which the needle stops after a thread trimming has been com

pleted.

The standard needle stop position is shown by the coincidence of the white

hand

wheel with the red

installation angle of the sensing element of the synchroniser

Instruction Book prepared for the

dod

on the machine arm. This adjustment can be made by changing

component

motor

assembly for the detailsofadjustment.

dot

marked on the

Refer to the separate

the

White

Red

dot \ j .

dot

Printed
board

circuit

cover

Rotor

Magnetic

n

flange

"HITACHI**

Remove

component
of

the

justable range of the oval holes on

the

and

printed

motor:

cover

adjust

circuit

from

the

the

installation angle

board

synchronizer

within

the

the

rotor

flange.

"MATSUSHITA**

Remove

the

cover

motor:

from

the

synchronizer

adjust the installation angleofthe magnetic

plate.

ad

and

-

12

-

11.

Sharpening

Horn

Sharpen

Needle

this

this

Blade

Moving

center

corner

face

tip

knife

the

counter

a

Counter

knife

knife

o As

soonasyou

trimmer

counter

has

knife

o Put the resharpened

noticed

become

immediately,

dull, resharpen

counter

that

knife

the

thread

back

it's correct position shown by the following

illustration.

oIfyou

move the installing positionofthe

counter

position,

the

needle

and

vice

knife to

the

versa.

the

length of

after

right

thread

trimming

Bottom

the

throat

from

face

the

standard

remaining on

becomes

of

plate

the

to

longer

*Do

not

re-sharpen the moving knife.

12.

Important

o Allow the

Shorter

The

remaining

of

the

thread

notes

thread

spool to supply thread to the machine freely.

length

becomes;

Longer

Stepped

of

Counter

the

bed

knife

part

(If not, the length of the remaining thread on the needle after thread trimming may be too

shorttostayonthe

needle.)

o If skipped stitches are produced, the thread trimmer may trim only the bobbin thread.

In such a case, adjust

skipping

stitches.

the

timingofthe needle and the

-

13

shuttle

race in

order

to remove such

13. How to select the presser foot,

1)

Presser

foot

(

n

nz

2) Throat plate

Na

throat

plate, sewing hook and feed dog

1) Ptesser foot: Select small a and b parts.

2)

Throat

plate: Select small needle eye and

A

part.

3) Needle: Finer needle for less thread slip

page.

4) Sewing hook: Automatic lubricating

with

a groove.

5)

Feed

dog: If a feed dog which is
ly used is adopted, there is no problem,
but

if an extremely thick feed dog is used,

the backside of the dog teeth might be

.scratched when the moving knife moves

fully.

hook

common

14. Adjusting

the

timing of

DLD-432-4

the

thread

trimming cam

1) How to Judge the correct timing of the

trimming cam
In

order

to change

the

lengthofthe

remainingatthe needle eye after trimming,

adjust the timingofthe thread trimming

cam.

This

can be

done

the

arm

with

hand

wheel, according to the

thread

used-cotton

Tilt

the

machine,

your

hand

before

until

the

Just

the

turn

the

upper

easily by

indicated

or

the

thread

dead

sewing hook presser (D is pushed deeply

to right,

grooveofthe

there.Inthat

wheel

conventional

come

any

matched

arm ®

wheel (f) are matched together as shown

in the fig., it becomes a

timing.

the

cam

roller

cam

and

condition,

in

the

reverse

way,

to a

point

more. At this

so

that

and

the indicated lineofthe

direction

and

the

where it will

point

the

indicated

But if the indicating line 0 is

matched with the indicating line®,it

becomes a timing for

synthetic

matching

line

on

kind

synthetic

hand

thread.

wheel

take-up

point

andifthe

will

enter

the

will be

interlocked

rotate

the

than

hand

wheel

not

if cam timing is

lineofthe

cotton

thread.

thread

the

of

with

comes

cam

hand

the

will

rotate

hand

thread

-

14

-

Thread

trimnning

cam

Cam

roller

Cam

roller

shaft

arm

set

screw

2)

Howtomatch

Rotational

Rotate

this
with

the timingofthe

First, loosen the 2 set screws

match

the indicating lineofthe

cam

direction

hand

direction

Set

in

thread

of

the

Thrust

collar

screw

trimming

arm

trimming

cam

caminorder

with

the indicating lineofthe

Green (6)

from

set screw

hand

No.l

wheel.

and

(For

thread, match red color ® with the red color (5) and for synthetic thread, red color ® with

the green color

®).

Then, by pushing the sewing hook presser @ to right, interlock the cam and the cam roller,

and

the normal

cam does

and

15.

Adjusting

without

finally

•2.5mm'

rotating

hook

not

tighten

the

the

hook

shaft rotational direction with

rotate

any more, push the cam against the

the

cam

set screws in

positionofthe

Needle

Moving

shaft,

moving

knife

rotate

the

orderofNo.2

knife

the cam

your

1) The

when it has

is, as

moving
(1/6-^3/32")

When
position, it

bobbin

while if
the

Therefore,

the

only

toward

the

reverse

direction

finger tips. At the position where the

thread

trimming cam

and

No. I.

correct

positionofthe

movedtoits

shown

in fig., when

knife

has

from

the

retreated

cannot

threadatthe

it's

too

moving knife

it is

retreatedto2~2.5mm

the

centerofthe

range is less

scoopupthe

much,

might

very

importanttomatch

thrust

moving knife

maximum

the

trimming

the

feed

hit

each

tipofthe

positionofthe moving knife correctly.

No.2,

cotton

needle.

than

needle

instant,

dog

other.

and

than

collar

range

this

or

and

-

15

2) How to

match

knife.

Thisisadjusted

the positionofthe moving

by changing tlie right or

left position of the movingknife shaft ®

when the machine stops. By this adjust
ment, the interlocking

of

cam roller also changes, so match the

positionofthe

ward

the

shaft

thread

direction,

trimming

also.

a. First, loosen the magnet set screw (2)

and pull out the magnet link pin (3).

b.

Move

the magnet link ® downwards

and adjust the screwed-in amount of

the knife moving

CD.

If this nut is screwed in deep, the

shaft

retreating range of the knife becomes

greater

andifit's

loosened,

gets less.

c.

Loosen

both

set screwsoftrimming

cam ® and the thrust collar

d. Match the indicating lineofthe

wheel with the indicating lineofthe

arm.

(In case of

cotton

thread,

with ® of the front

synthetic thread, match @ with

e.

Rotate

the set screw

No.2®

point)ofthe trimming cam so

comestofront

and

whenitcomes

front, push the sewing

right.

f. Move the cam to right and left and

interlock

g. With this

cam

direction

anymore.

h.

Temporarily

®

i. Tighten the lock

the

condition,asyou

to right,

until

of

the cam.

cam

and

the

moveittoward

the

cam

tighten the set screw No.2

nut

®.

j. At this point, verify the following:

(T)

Is the indicating line of the pulley

matched?

@ Is the roller inserted smoothly into

the cam groove?

® Is the retreated range of the moving

knife

k.

Tighten

securely.

16

-

2~2.5mm?

the

two

set

screwsofthe

the cam and the

cam

adjusting

the

nut

range

hand

match

fig.

and for

®).

(indicated

that

hook

prcsser to

cam

roller.

pull

the

the

arrow

cannot

rotate

cam

to

®

it

to

1.

Push the thrust collar against the cam and tighten the two set screws,

m. Attach the magnet link pin in its original position.

The

simple

methodtojudgethe correctpositionof the

moving

knife

would

be to

verify

if the

step part of the bed and the forked base of the knife are parallel to each other. If they are

parallel,

the

positioniscorrect

(Note) 1) No matter how slight the right or left position adjustment may be, it has a big

bearingon the retreating rangeof the movingknife.

2) Verifyif the movingknife disposesthe thread properly as shown in

fig.

16. The floating range of the second thread tension disc

1) How to verify the floating range

At

the

position

come

just

lower

the

thread

presser is

verify

that

thread

tension

2) Adjusting the floating range of the second

thread

tension

(T)

To increase the floating range, loosen

nut

(B)

(DTo decrease the floating range, loosen

nut © and tighten nut

17. Changing

the

@ (D ©

moving

knife

After the adjustment is completed, tighten
both

® and © nuts.

To change the moving knife, do as follows:

1) Loosen the knife forked base pin set screw

(Fig.C®)and pull out the knife forked

base

pin

(Fig.C

2) Remove the moving knife hinge screw

(Fig.A

®),

(Fig.A

d))

to the position shown in Fig.B (I) and

remove the pin of the moving knife from

the

knife

forked

3) Move the knife forked base to the position

shown in Fig.B© and remove the knife

Fig. A

hingedscrew(Fig.B(D ). For this purpose,

u.se

the

box.

special

For installing back, reverse the above procedure. After the knife hinged screw is tightened, move

the moving knife with your hand and see if it moves smoothly without any rattling. Match the

knife forked base to the position shown in

Fig.B

(D and firmly insert the knife forked basepin

into the forked base. (If the knife moving shaft is moved to right or left, the pin willgo in deep

into the base). When the shaft is moved to right, be sure to see that the knife moves to right, also.

where

the

take-up has

before

the

upper

dead

presser

foot

and

when

the

pushed

hard

the

floating rangeofthe second

discis0.5~lmm.

disc.

to right,

and tighten nut (§).

(g).

d)).

move the knife forked base

and the

moving

knife

(Fig.ACD)

ba.se.

spanner

in the acces.sories

point,

hook

-

17

Knife

Moving

forked

base

knife

Knife

forked

base

Knife h!nged_

screw

/

Moving

knife-

Knife

Moving

forked

base

knife

Fig. BCD

18. Adjusting

the

If the bobbin thread

bobbin

presser

thread

(Fig.C

Fig. B(D

Fig. B(D

presser

(D ) is penetrating too deep toward the bobbin caseat the

trimming time, the bobbin will not rotate and the bobbin thread will be trimmed too short,

causing thread slippage at the start of sewing.

On

the

the

contrary,

bobbin

thread

if it is not

presser

inserted

at the

deep

trimming

enough,

time,

the

needle

shortening

thread

the

thread

will

slip

remaining

out

from

amount

thetipof

at the

tip of the needleeye after the trimmingand invitesthreadslippingout.

1) The correct position of the bobbin thread presser

When

the thread trimming lever is pressed hard against the stopper side, the bobbin thread

should

be pulledout

the bobbin thread

shown in Fig,D.

2) How to adjust the bobbin tliread presser

Loosen

the

.screws

easily.

At this

pre.sser

position,

and the upper carved part of the bobbin should be 1.5~2mm as

(Fig.C

® ), and

adjustbymoving

the

clearance

the

between

bobbin

the tip

thread

(Bobbin

presser

presser)

inand out or

up ond down. At this instant, adjust the fore and aft position of the bobbin thread presserand

adjusttheposition of the thread

After

adjusting,

tighten

the set

shaft is not contacting the bottom of the cam

trimming

screw

stopperarmas shownin the

of the stopper. Besure to

groove

figure.

verify

that the tipof the

roller

when the stopper isdeeplyinserted. If

it's contacting, refer to the chapteron"Adjustingthe slideshaft" and re-adjust the positionof

the

slide

shaft

collar.

1.5

~2mm

T

Ea

of

-18-

OLO-432-4

19.

Adjusting

20.

Howtoinstall

the

slide

and

shaft

remove

20mm

13.5mm

the

Q>.

knife

The

moving

range

of the slide shaft (D is

5.4mm{7/32"). This is adjusted by moving the

slide collar (D toward the shaft direction. Alsp,

the position of the cam roller shaft arm (D

should be

* The adjusting procedure is as follows;

® Determine the position of the thread trim

13.5mm(33/64")

ming arm

positionofthe

stopper

hook

as shown in fig.

depending

thread

presser.

(D Adjust the position of the slide collar so

that

the moving range of the slide shaft

comes to

5.5mm(7/32").

(D Adjust the position of the thread trimmer

magnet

(DC

When

the

the

position

solenoid).

thread

trimming arm has moved to

where it is

almost

touching

stopper, adjust the position of the thread

trimming magnet so

is

attached

plunger

hits

the

to the

rubber

that

the snap ring which

thread

trimming

ring

and

stops

when the magnet is pulling, there should be

no

rubber

installing

clearance

base

ring.

between

the

two

To remove the knife installing base 0 do as

followsinorder:

1)

Take

out

the

sewing

hook.

2) Loosen
out

3) After removing the

link hinged screw

the

the

knife

knife

forked

forked

base (5) and. pull

base pin (§).

hook

(0,

and if the hook

thread presser

presser hinged screw 4 knife installing base

set screw (2) is pulled

out,

installing base will come off. To install

back,

reverse

this

order.

upon

the

the

magnet

and

also

endsofthe

the

knife

-19-

Hi.

HOW

TO

ADJUST

1.

Adjusting

You

must

adjust

the

the

in the following way;

THE

positionofthe

positionofthe

WIPER

wiper

wiper according to

the

thicknessofthe

Rotate

1)

the handwheel manually in the

normal direction so

on

the

handwheel

dot(Don

the

that

coincides

frame.

materialtobe sewn

the white

with

dot

the

red

(D

2) Insert the wiper ® into the wiper driving

shaft (D so

tween

becomes

clearance

that

the

wiper edge and

2mm

and

between

the

vertical clearance be

the

the

needle

needle

parallel

also

the

center

point

and

the straight inside faceofthe wiper be
comes 1mm. Fix the wiper at such a

position by tightening the lock

nut

(3).

2.

Adjust

Wiper

the

positionofthe

switch^

2mm

M

wiper

magnet

Pull the plunger fully

into

the

coil, loosen

screw ® which is clamping the wiper magnet

and adjust the positionofthe wiper magnet
so

that

the wiper tip is positioned with a clear-

ranceof2mm

the

needle.

After a
the wiper magnet at

ing

the

When you do
wiper switch.

-

20

-

from

the

center

correct

position has been obtained, fix

that

screw.

not

position by tighten

use the wiper,

line

of

turn

off

the

the

IV.

1.

Forming

HOW

TO

USE

the

switch-back

ANDADJUST THE

stitches

Switch-back

button

SWITCH-BACK

1) Push the switch-back button, and the ma

chine will perform a reverse feed to form

the

switch

back

BUTTON

stitches.

2)Aslong as the button is kept pressed, the

machine will perform

the

reverse feed.

3)Assoon as the button is released, the

4)

machine

When

reverse

will reversed to the

normal

feed.

you sew the half stitches, use the

feed

control

lever.

Z Adjusting

I

3. Adjusting

the

the

reverse

position of

stitch

the

switch-back lever

length

You

may

change

the

positionofthe

switch

back button to a suitable height for your

operation. Loosen the screw (D, move the
switch lever up and down and obtain a suit

able height. Tighten the

adjustment.

An excessive length of reversestitch is usually

formed

by the operator until he gets

operate

this

new

In such a case, it

en the seam line with the reverse feed by
decreasing the stitch length of reverse feed in

comparison with the stitch length with the

normal feed, if it is permissible. To lessen the

length of the reverse stitch, loosen the screw

(D

and

push

push it

down

lengthsofthe

identical.

device.

would

up the

to the

normal

screw

firmly after

be advisabletoshort

stopper

bottom

and

plate

end. the stitch

reverse

used

(2).Ifyou

feeds

are

to

-

21

-

V.

AUTOMATIC

PRESSER

FOOT

LIFTER,

AK-2

(Optionalattachment)

The automatic

presser

been made. A special

1.

Howtooperate

presser

foot lifter

foot and holdingit at the

motor

is used for this lifter AK-2.

AK-2

AK-2

is an optional attachment

heigliest

position for 10 to 15secondsafter thread

which

is capable oflifting the

trimming

If you want to raise the presser foot during a

sewing work, press the

knee

switch.

Such raised presser foot will be comming

down

immediately

released.

after

the knee switch is

If you want to bring down the presser foot

which

has

been

Knee

2.

Adjusting

switch

the

Coupler

presser

lifter

stroke

the

and release

the

lock

knee

rai.sed as

the

matic run, tread on the pedal forwards (toe-

down)orpush

1. Loosen

2. Lower the presser

by loosening

3.

Push

the

resultofan

the

nutofthe

foot

stopper

lock

nut.

switchtodrive

knee

switch.

coupler.

the

(A) fully

4. You can adjust the stroke of the presser
foot by rotating the plunger on the far

Presser lifter

Tighten the lock

Loosen the

lock

Presser

nuts

nutofthe

stopper

Presser

stopper

V.

lifter

of the

lifter

(A)

lever

stopper

stopper

(B)

(A) and the

(B), push the presser

sideofthe
by a

a

counterclockwise

(The
presser

5. Raise

voir by activating the solenoid.

6. Raise the

ther

switch.

coupler

solenoid;

clockwise

maximum

footisabout

stopper

(A)

stopper

half

turn

respectively.

lifter

lever

the

strokeisincreased

turn

andisdecreased

turn.

stroke

performedbythe

8mm(5/16")).

untilithits

(A) by

after

releasing

towards

the

the

rotatingitano

the

solenoid

your hand and adjust the height of the stopper (B) so that the playing gap between the top
end/of the knee lifter rod and the knee lifter connecting rod located on the machine head

become about

lmm(3/64").

After obtaining a proper position, retighten each lock nut.

has

auto

solenoid.

by

oil reser

knee

with

VI.

SPECIAL

(Optional

SWITCH

TO

attachment)

HOLD

THE

NEEDLE

AT

THE

TOP

POSITION

We are also ready to supply you with a special switch to hold the needle at the top position when
the machine is stopped during a sewing work with the pedal at the neutral position. This switch
is operated with

business

office.

your

knee.

For

further details, please

—22—

contact

our

agent in

your

area or our main

Diagram

JZ-D31

Showing

MethodofAssembling

Table

88101-552-000

SM-9082023-SE

WP-0871602-SE

WS-0861410-KR

S0-1204215-SE

WP-1252210-SC

WS-1253010-KN

80207-012-000x2

88209-125-000

x4

x4

x4

x4

x4

x4

B8216-012-0A0

x2

B82O4-552-A00

SK-l2IIOOO-SCx6

88204-552-800

88203-552-000

D7114-555-BA8

88126-552-OAE

SM-9082023-SE

WP-0871602-SE

WS-0861410-KR

MM-6080721-SE

88102-552-000

88104-552-000

08212-125-000x2

88213-125-AAOX2

08201-555-COO

x2

SK-3514000-S0X4

88105-552-000

D8112-555-80E

SM-9061203-SE
WP-0671016-SE

WS-0621210-KRX3

88111

552-000

x3
x3

88103-552-000

88112-552-000
WP-0871602-SE
WS-0861410-KR
SM-9082023-SE

88110-552-000

gg.

NM-6120003-SE

88107-552-000

08113-555-800

x2

x2
x2
x2

D8II4-555-BOE;

SM-9082023-SE

WP-0871602-SE

WS-0861410-KR

NM-6080721-SE

x2

08110-555-BOE
08115-555-800

88108-552-000

88109-552-000

—23—

DIMENSIONAL

DRAWER
INSTALLING
POSITION

STOPPER

INSTALLING

POSITION

DIAGRAM

(525)

OF THE TABLE (TOP SURFACE)

339.7

^08.5

depih

POWER

SWITCH

POSITION \

(holM)

30

SOURCE

—100

I

holt})

INSTALLING

•BTpnTr

618

(holfrt)

TOKYO

JUKI

TOKYO

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

Business

Cable:

JUKI

Office: 23-3, Kabuki-cho 1-chome,Shtnjuku-ku, Tokyo 160. Japan

JUKI

TOKYO

INDUSTRIAL

Telex:

22967;

232-2301

CO.,

LTD.

ii?:

'

?j:inted in

Japan(T)