Juki LK-280 User Manual

mJUICI

m

HIGH

SPEED,

SINGLE

NEEDLE,

ENGINEERING

LOCKSTITCH

INDUSTRIAL

SEWING

MANUAL

I •

Gl

H • UUKI

BARTACKING

MACHINE

TOKYO

JUKI

INDOSTRIAl

CO..

LTD

•A

MODEL

LK-280

CONTENTS

ENGINEERS

MANUAL

(STANDARD

(CORRECTIVE

(I)

(II)Thread

ADJUSTING

Thread

MEASURES

slippage

breakage

(III)Inadequate

(IV)

Needle

( V

)Cautions

(VI)

Inadequate

(CAUTIONS

(HOWTOTIGHTEN

(ADJUSTING

(I)

Adjusting

(II)

Adjusting

(III)

(IV)

Adjusting
Adjusting

breakage

ON

DISMANTLING

METHODOFVARIOUS

FIGURES) 1

FOR

thread

on sewing

thread

THE

RATTLE)

the

starting

the

pedal

the

thread

the

position

FAULTY

STITCHES)

trimming

synthetic

tension

OF PARTS) 22

DEVICES)

and

pressure

trimming

of

materials

stopping

decreasing

device

the

stop-motion

with

unit

synthetic

lever

thread

7 '

7

11

16

18

19

20

23

24

24

34
39
42

(V)

Adjusting

(VI)

Adjusting

(VII)

(VIII)

(IX)

(X)

(XI)

Adjusting
Adjusting
Adjusting
Adjusting
Adjusting

(XII) Adjustment

(XIII)

(XIV)

(MANUAL

AO-10

ENGINERS

Dismantling

Notable

FOR

REMODELLING

UNIT

(ONE

MANUAL

the

thread

the

feed

the

shuttle

the

height

the

height

the

safety

the

bobbin

of

the

the

places

PEDAL

AO-11 64

on assembling and

FOR

tension

release

components 44

race

of

the

of

work clamp

the

wiper

foot

device

thread

winder

V-belt

silicon

oil

tank

disassembling

THE

SUBCLASSES)

LK-280) 60

42

46
47
47
48
49

50
50

51
53

LK-280

ENGINEERS

MANUAL

(STANDARD

ADJUSTING FIGURES).

1. Stop-motion angle

* At

the

2.

Matching

highest

*

Feeding
is

above

(Refer

point

point

the

stops

lowered

the

to

5.5mm(7/32")

feed

to

throat

Fig.15

53°

lower

of

the

needle

cam

when
7—10mm(9/32"'~-25/64")

the

needle

plate.

page9,page

bar.

point

20

than

3)

the

(Fig.l)

Stop-motion

0-

53

angle

Fig.l

Fig.2

3.

Matching

* At

4.

Installing
*

*

of

Left

with

Fore

the

the

stop-motion

the

knife

right

the
aft

thread

and

position

position

center
position

trimming

time,

end

of

of

groove

the

of

needle

shuttle

Needle

Rear

knife

should jibe with the angle @ (Fig.3)

clearance

hole

race

spring

should

end

of

needle

between

is

1.5mm(l/i6").

jibe

the

thread

handling

Fig.3

device

- 1 -

5.

Matching

*

Height

the

of

needle

needle

and

bar

the

shuttle

race

Match

needle

end

bushing.

(Note]

In

(over

raise

higher

*

Matching

When
of
end

bushing

of the needle

*

Clearance
and

of

case

the

needle

of

shuttle

the

bar

the

CFig.4-a)

#30)

the

thgin

the

lower

needle

are

upper

with

needle

thick

is

height

standard.

shuttle

bar

bar

jibed,

and

between

Should

mark

the

bar

line

bottom

lower

thread

to

be

used,

0.5mra(l/64")

mark

and

line
the
lower

the

bottom

center

the blade point

the

needle

be

of

of

Upper

Fig.4-a

shuttle

mark

line

Lower

Fig.4-b

should match. (Fig.4-b)

mark

line

0.050.

*

Clearance

and

Should

front

driver

prevent

needle.

*

Clearance

shuttle

(Fig.4-b)

lmm(Fig.4-c)

driver

be

end

as

curving

(Fig.4-d)

should

between

Omm

surface

a

guide

between

the

Make

of

the

to

of

the

be

0.3i(l/100"]-^

needle

the

driver

and

0.5mm(l/64")

0.05~0.l

Fig.4-c

mm

•Omm

Driver

Fig.4-d

- 2 -

6.

7.

Position

*

42-stitch

The

on

the

of

work

*

28-stitch

bartacking

The

on

the

of

work

Position

26th

matching

18th

matching

of

of

stitch

clamp

stitch

clamp

work

large

large

machine

wiper

clamp

bartacking

falls

center

foot.

falls

center

foot.

foot

(Fig.5)

machine

mmviSww

26th

18th

Fig.5

stitch(42-stitch

large

stitch(28-stitch

large

bartacking)

bartacking)

8.

* At

* When

Position
* At

the

stop-motion

is

at

the

right

of

the

point,

1.5inm(l/6").

the

of

the

stop-motion

position

needle.

wiper

clearance

(Fig.6)

safety

time,

13inm(33/64")

passes

should

adjusting

time:

by

wiper

the

be

plate

to

needle

the

O

Fig.6

Left

right

Top&bottom

(Fig.7)

clearance ® —0.3nim(l/64")

clearance

®—0.3mm(l/64")

- 3 -

Fig.

0.3mm

©

7

9.

Position

*

Position

At

the

of

stop-motion

of

stop-motion

stop-motion

time,

regulating

clearance

cam

between

the stop-motion

roller

*

Position

At

clearance

and

be

should

of

the

low

the

stop

3inmCl/8").

regulating

be

stop-motion

speed

between

link

(Fig.9)

cam

0.5mmCl/64")•

frame

rotation

the

rod

time,

stop-motion

latch

and

(Fig-S)

should

the

cam

Fig.

8

10.

Fig.9

Position

*

The

running and

of

moving

speed

range

at

the pulley should be

(Fig.10)

(Note)

Adjust

so

driving

speed

rotation.

that

to

the

when

and

driving

when

high

speed,

decreasing

components

of ® at both idle

high speed running

0.9*^

pulley

is

rotated

it

changes from low

1.lmm(l/32'^^3/64")

pressing

to

start

that ©

makes

of

plate

1/4

A © 0 O 0)

0.9-1.1

mm

.

...

Fig.10

Q)

-

_J

'

IT

- 4 -

11.

I *

Timing

When
the

of

the

last

thread

needle
stitch

tension

thread

has

release

loop

slipped

of

out

*

12.

Position of

*

brim

the

from

thread

released.

The

at

rotating

from

cam

When

as

seen

the

the

comer

tension

tension

the

outer

by 0.

bobbin

the

bobbin winder

from

outer

will

V-belt as

rim

be in contacting

of

bobbin

disc

release

time

is

rim

of

3mmCl/128")

winder

above,

of

the

shown

in

No.2

latch

separated

is

the

. (Fig.11)

assembly

is

in

make

adjustment

bobbin

Fig.12.

case,

feed

idle

winder

position

Tension

(Fig.12)

condition

so

that

wheel

with

Slanted

/

release

part

•

bar

Fig.11

V-belt

- 5 -

for
Fig.12

driving

pulley

13. Relation between motor

rotations

are

marked

pulley

on

the

and belt(Power source cycle and

pulley)

number

o£

Power

source

50

Hz

60

Hz

14. Relation

Sewing

specs.

Extreme

light

Synthetic

materials

Standard

weight

Sewing

speed

2000

1700

2000

1700

spm

spm

spm

spm

between

Needle

size

DP X 5

Max.

of

pulley

99.50

87.5

84

74

B7101280000

B710128000B

B7102280000

B710228000B

needle,needle hole guide,sewing specifications

#11

#14(super)

#16

dia.

Needle

guide

D2426282C00

Standard

B2426280000

Driving

47inch

46

46

46

hole

r r

belt

MTJVM004700

MrJVM004600

MTJVM004600

OTJVM004500

.

Bartacking
pattern

D242684M00

Pressure

belt

35inch

34

34

35

Knit

Men's

casual

f T

II II

m'JVM003500

MTJVM003400

OTJVM003400

NfrJVM003400.

Sewing

goods,tricot,undergarments

suits,ladies'

wear

decreasing

garments

suits,

•• It

Heavy

materials

Extreme

heavy

weight

weight

(Note)1)For

2)

DPX17

DP X 5

DP X

17

sewing

#21isabout

#18

#19 #21

#19 #21

extreme

ft

B242628000B

heavy

weight

4.5mm(ll/64")

II

materials,use

longer

- 6 -

than

Work

uniforms,coats,

Jean

pants,cold-preventing

clothes

B181728000B

DP

x 5

for

#21

shuttle

etc.

race

ring

(CORRECTIVE

MEASURES

FOR

FAULTY

STITCHES)

This

symptoms
breakage

(I)

Thread

*

*

*

1)

chapter

such
and

slippage

Faulty

needle

any

sewing

Principal

*

Stitches

*

Inadequate

*

Inadequate

*

Bobbin

Corrective

Prevent

*

Verify

If

not,

will

as

thread

inadequate

stitching
thread

shape

reasons

skip

length
adjustment

thread

measures

the

if

the

adjust

treat

on

slippage,thread
thread

symptoms

slips

is

at

is

out
formed.

the

first

of

the

too

short.

of

skip-stitching

shuttle

according

the

trimming.

from

trimmed
the

race

to

corrective

This

the

needle

stitch.

needle

thread

of

the

and

the

the

standard

measures

breakage,

is

a

faulty

at

thread.

take-up

first

needle

stitch.

on

skip-stitching,

condition

first

are

or

spring.

in

correcting

faulty

second

correct

procedure.

stitching

needle

by which
stitch

relationship.

the

before

*

Lessen

Loosen

shuttle

rotating

adjusting

the

However,

becomes
might

of

damaged.

clearance

hit

the

the

the

race,

the

shaft

if

too

the

shuttle

Use

clearance

clamp

and

shuttle

to

this

small,

blade

and

caution.

between

screw

adjust

and

O-OS-^O.1mm.

clearance

race

make

the

point

might

for

needle

(Fig.13)

by

be

the

needle

and

the

shuttle.

.-j

n

Shuttle

Clamp

for

Fig.13

screw

shuttle

race

adjusting

race

shaft

- 7 -

*

Inadequate

rotation

of

the

shuttle.

When

lap

it

Also,

the

surface

Watch

*

Prevent

sewing

To

prevent

would be

work clamp

and

the

a

convex

* Watch

Watch

has

started

"floating",

the

shuttle

well.

sometimes

of

carefully.

"concaving"

cloth.

these

best,

foot

work clamp

shapeC Q£| )

the

phase

carefully

to
loosen

does

thread

the

shuttle

and

faulty

normally,

with

a concave

foot

of

the

and

see

pierce

the

not

rotate

hards

race.

"convexing"

conditions,

to

process

lowering

as

shown

feed

the

feed

cam.

if

the feed has completely stopped

surface

cam

smoothly,

get

stuck

shape(

plate

in

Fig.14.

of

guide and

of

it

the

the

to

the

cHa

with

Sewing

)

sewing

adjust

cloth.

the

cloth

feed

Work

Fig.14

when

Should

cam.

Work

clamp

lowering

the needle

the

clamp

foot

foot

plate

needle be

After

cam and

2)

Insufficient

When

moving

tension

the

Worm

length

the feed

releasing

Tension

wheel

length

of

the

cam,

shaft

set

of

nut

trimmed

needle

be sure to adjust the

timing.

releasing

Stop-motion

regulating

Fig.15

needle

thread

(Fig.15)

timing
adjustment

Feed cam

cam

thread

after

guide

Standard

it

is

stitch

pin

hole

first

number

for

stitch

controlling

trimmed

from

the

the

cloth

is

too

needle

at

short,

first

eye

the

at

stitch.

the

thread

time

(Fig.16}

- 8 -

will

of

slip

needle

out

piercing

Thread

slips

Fig.16

*

The

standard length

of

trimmed

needle thread

is

35'-40mmCl-3/8'-l-37/64")

* When

or

the

Adjust

(Refer

Conversely,

too

long.

* When

too

short.

* When

thread

needle

appropriate

0.1^0.

*

If

the

handling

thread

the

tension

thread

the

to

the

tension

the

counter

is

thread

ISmm.

clearance

device

will

will

timing

Fig.47,

if

the

trimmed

and

tolerance

become

release

by

page

disc

knife

at

the

of

of

slip

means

timing

No.l

the

bobbin

between

l.Smm

the

shorter.

timing

out

of

4-3

is

pressure

is

too

c£]ii

between

counter

from

tension

).

too

high,

part

thread

the

is

the

fast,

knife

late,

needle.

is

the

of

will

needle

the

is

the

release

the

too

thread

the

be

hole

end

widened,

thread

lever.

trimmed

strong,

moving

trimmed

guide

of

needle

will

will

length

the

be

knife,

short.

and

eye

the

thread

trimmed

so

the

and

length

be

trimmed

will

generally

The

counter

the

of

be

sporadic

will

before

most

thread

trimmed

too

be

both

knife

short

or

trimmed

the

is

needle

3)

Inadequate

*

adjustment

When

knife

Consequently,

insufficient,

the

will

moving

pull

the

causing

Tension

range

in

the

length

post

of

set

the

of

needle

the

socket

screw

thread

the

of

thread

thread

thread

thread

Fig.17

take-up

take-up

immediately

from

to

slip

spring

the

out.

.'Tension

spring

needle

(Fig.17)

set

is

after

to

post

screw

too

the

the

big,

thread

thread

the

counter

is

end

trimmed.

becomes

- 9 -

*

When

the

moving

range

of

the

thread

take-up

spring

is

too

big,

loosen

the

*

(Note)

4)

Inadequate

*

*

thread

controller

When

insert

direction.

When

the

tension

the

a

the

tension

matching

return

If

from

can

The

2.2cm(7/8").

If

properly.

the

length

the

not

standard

it's

be

short,

toward

take-up

screw

tension

release

point

length

of

bobbin

formed.

length

(Fig.18)

post

No.2

counter-clockwise

spring

driver

disc

to

is

pin

is

at

parallel

of

bobbin

the

bobbin

comer

from

slightly

set

is

strong,

the

released,

is

positively

thread

is

too

the

widen

screw

arrow

part,

thread

short,

bobbin

the

and

rotate

direction.

loosen

place

be

sure

at

sometimes

coming

sewing

comer

clearance

the

and

rotate

to

midway

out

shape

is

the

entire

tension

see

that

of

the

tension

it

the

thread

post

toward

the

slanted

tension

socket

set

counter-clockwise

matching

part.

release

bar

screw,

point

If

does

of

the

not

between

hole

*

If

guide

and

*

If

bruised,

Polish

* To

bobbin,

guide.

the

difference

is

will

@

part

it

prevent

the

too

be

it

use

counter

high,

trimmed

of

will

with

forcing

the

of

the

the

shuttle

invite

some

out

exclusive

knife

level

and

bobbin

short.

bobbin

abrasives.

of

the

bobbin

the

between

thread

race

thread

(Fig.19)

bobbin

needle

the

spring

case

counter

will

be

is

breakage.

thread

for

LK-280

knife

sucked

due

to

model.

in

idle

and

by

spinning

Pig.18

the

the

Fig.19

needle

counter

of

hole

knife

the

-

10

-

(II)

(A)

Thread

Thread

*

Faulty

*

Principle

breakage

breakage

condition

reasons

during

stitching

Here,

the

*

Shuttle

*

Thread

*

Bruise

*

Too

*

Bruise

*

Needle

*

Bruise

operation

it

bobbin

small

means

thread

is

bites
of

the
clearance

of

the

hits

of

the

the

bruised

into

driver

needle

the

needle

breaking

in

the

the

between

work

middle

shuttle

hole
clamp

of

the

guide

foot

the

of

needle

stitching

driver

thread

and

and

operation.

the

shuttle

*

Corrective

1)

Bruise

* The (a)

of

with

of

a

the

knife.

Smooth

retreating

needle.

However,

with

the

corrected,

rear

side

If

the

measures

the

shuttle(Fig.20}

part

blade

this

part

the

if

it's

above

verify

of

dimension

is

where

point

with

position

retreated

preventative

and

the

shuttle

is

* Too much

the

the

bruise

of

the

a

whetstone

of

the

too

see

that

race

insufficient,

tension

cloth

is

shuttle

and

shuttle

much,

measures

the

ring

smooth

of

formed due

and

the

finish

race

skip-stitching

the

blade

dimension

is

same

it

thread

to

blade

it

with

somewhat,

point

of

the

as

shown

out

with

when

the

point

may

slant

in

needle

hitting

becomes

some

prevent

result.

of

the

Fig.21.

a

whetstone.

is

of

like

abrasives

hitting

shuttle

line

part

piercing

the

and

Also,

can

of

needle

a

shape

by

of

the

even

not

the

if

be

Fig.20

-

11

-

Fig.21

CM

d

1

*

The

(D

part is

the

place

where

bruise

is

formed

when

the

needle

becomes

curved

or

broken.

This

be

*

is

given.

The

© part is the place

exchanged

This

does

to

stitch.

*

The

(d)

out

of

happen

careful.

2)

Biting

*

into

When

the position of the shuttle race spring

properly disposed

correct

or

broken and

the

most

and

not

part

the

thread,

its

occur

is

when

frequently occuring bruise, so special

blade point gets

often

the place

causing

so frequently but

the

shuttle

and

position

as shown

the

needle

where

but

where

when

bruise is

when

the thread is

the

thread

synthetic thread

bites into the

in

Fig.3.

thread

caught

it

is

to

shuttle

slips

out

the

thread

attention

formed

or

bruised,

be broken.

when

when

damaged

is

is

bad, the needle thread

the shuttle is to

the needle is broken.

it

is

practically

at the time of slipping

This,

to be used, be extremely

too,

race. Set the spring to the

is

damaged

should

impossible

does not

is

be

not

*

When

fault

*

The

but

inadequate

Watch

the R of the ® part of shuttle blade point

results.

installed

if

this

carefully.

dimension

becomes

and

the

Exchange

smaller,

faulty

(Fig.23)

the

shuttle

with large R with a smaller

of ® part of the shuttle race

proper

biting

disposition

in

results.

of

is

too great, the biting

is

7.Smm(19/64")

the

needle

7.5mtn

thread

R.

(Fig.22)

becomes

Fig.22

-

12

-

Fig.23

3)

Bruise

*

Verify

of

if

the

driver

there

is

or

there

is

not

any

0.3~0.5mm

4) Too

*

Conversely,

high.

bruises

shuttle

sewing,
spells
operation.

thread

part

small

The

(1/64^1/32").

When

causing

on

driver

any

deathknell

path

and

clearance

standard

this

thread

(Fig.24)

the

entire

spring.

bruise

This

finish

its

neighbor

clearance

clearance

breakage

if

the clearance is too big, the

on

to

the

is

especially

of

both

area.

between

is

circumference

In

high

the

driver

stitching

true

sides

(Fig.24)

the

driver

between

too

the

small,

speed

spring

of

shuttle

the

of

of

the

A

and

needle

the

the

or the needle thread to

shuttle

and

thread

sound

Fig.24

the

driver

does

become

is

0.3-0.5mm

not

slip

extremely

too

of the shuttle gets too

out

welit,

long.

*

The

the blade point of shuttle

5) Bruise

*

When

Also,

containing

6) Needle

When

position

work

If

some

7)

Bruise

*

If

Be

if

clearance between

of

the needle

the

needle

if

abrasion is

lapping

hits

the

the fore

of

clamp

foot

the needle

kind

of

of

the

breaks, invariably bruise is

work

and

the

work

and

should

sand

needle

hole

formed

agent,

clamp

aft

clamp

cuts

hit

paper

the

feed

the needle is bruised,

sure

the

to

verify

driver

is

the

clearance between the needle and

guiding

driver

came

guide

on

and

foot

amount

foot

the

the

and smooth

it

the

and

the

shuttle

to the

bottom

the needle,polish the guide with

it

will

is

thread.

work

be

is

increased,

bad,

clamp

it

out.

smooth.

the

foot

invites thread breakage.

needle.

position.

formed

sometimes

needle

and

bruised

should be measured

to the

needle

an

will

when

hit

it,

the

the

the

polish

shuttle

inside

when

hole

oil

guide.

wick

installed

of

it

with

and

also

the

-

13

-

8)

Tension

of

thread

when

needle

is

piercing

the

cloth

(B)

* Make

and

pulling.

Thread

*

Faulty

*

Principal

*

Corrective

the

also

breakage

condition

thread

make

reasons

measures

take-up

the

at

pressure

thread

spring's

of

trimming

the

stroke

spring

time

This

needle

at

is

the

forming

*

Defective

*

Moving

*

Height

*

Shuttle

*

Inadequate

surface

*

Position

to

to

a

thread

last

the

knife

of

small

about

faulty

stitching

normal

thread

counter

race

finish

of

needle

of

scale(6-^8mm)(15/64-^5/16")

30—50gr

condition

or

the

is

bruised

spring

moving

bobbin

thread

releasing

knife

of
hole

knife

time

is

thread

at

the

by

thread

without

trimming

timing

bruised

guide

start

which

path

of

the

is

cut

per
process.

of

lower

1)

Defective

*

When

tension

* The

is

shown

Condition

needle

1

Too

2

Scattering

3

Short

4

Cut

When

adjustment

adjusting

measures

the

thread

disc

relationship

below.

of

thread

long

§

jumps

in

midway

shaft,

releasing

holder

(Fig.

up

is

move

not

in

between

25)

Tension

Lower

Lower

Raise

Raise

impossible

the

thread

timing

releasing

the

down

down

up
up

either

thread

release

release

is

at

too

slow

condition,

releasing

lever

and

thread

timing

the

above or below the

notch.

thread

breakage

and

is

the

needle

thread

cut

occurs.

release

with

thread

the

-

14

-

2) Moving

knife

is

bruised

(Fig.26)

Raise

Lower

Fig.25

*

3)

Height

*

4}

Shuttle

up

down

When

When

occurs.

there

of

the

In

counter

height

knife before

breakage.

(Refer

to

race

Fig.29

is

bruise

suchacase

knife

of

it

is

6 30

spring

is

along

the

cut

for

bruised(Fig.27)

the

polish

counter

at

the

standard

Fig.26

thread

the

knife

cO=t

passing

parts

is

part

height)

with

too

of

5

parts(A,B,C,D),

some

high,

the

abrasives.

the

moving

5

Fig.27

thread

thread

touches

knife and causes thread

breakage

the

counter

*

When

a

there

case

5) Inadquate

*

6)

When

surface

knife

at

thread

and

correct

Position

*

When

the

the

will

the

polish

finish

thread

needle

catches

thread

will

be

this

of

moving

needle

is

bruise

it

with

on

theApart

some

abrasives.

of Fig.27,

thread

breakage occurs. In such

of thread path of lower surface of needle hole guide

hole

the

trimming

be

scraped

cut.

fault.

path

of

guide

thread

Be

(Fig.28)

the

and

time

at

careful

is

the

lower

bad

feed

and

comer

and

the

the

it

moving

out

(^777777m

T '

knife

thread

passes

the

shuttle

Moving

at

the

knife

last

A

Fig.28

stitch,

v

f

J V

Cut

I—'

if

here

the

'

tension

seems

somewhat

to

be

too

strong,

larger.(Standard

make

is

the

matching

1.5mm(l/16"),

-

15

-

clearance

refer

to

with

Fig.2

the

).

moving

knife

(Ill)

Inadequate

thread

trimming

Faulty condition

*

Principal

*

Corrective

1) Inadequate

*

When

all

the

A

the

gone

cutting

somewhat

This

stitching

the

is

is

bobbin

extremely

reasons * Inadequate

*

Too

small clearance between

and

the

* Inadequate matching
* Inadequate

*

Skip-stitching

measures

cutting

moving

or

when

power

braded

power

of

the

knife

knife or counter knife

the knife is brand

of

the

knife

new

moving

knife cuts

a faulty condition in

is

completed,

thread

too

cutting

moving

position

new

becomes

is

long

knife

of

is

and

inadequate.

better

either

not

trimmed

or

too

power

of

clearance
of

the

the

last

extremely abraded or

the cutting surface is inadequate,

than a brand

which

the

or

short.

the

the

with

shuttle

stitch

even

needle

the

though

thread

needle

or

thread

knife
needle hole guide

the
race

new

moving

spring

the

moving

knife

blade

knife.

is

*

Relative

(1)

Height

Should be 0.5mm(l/64")

(2) Difference

Counter

(3)

Moving

Should be

(4)

Rattle

dimensions

of

counter

of

level

knife

knife

should be

and

biting

of

moving

of

various

knife

above

between counter knife and needle hole guide

0.1mm

counter

knife

by 0.2Smm(l/lQ0")(Refer

knife

toward up and

Should be 0. OS(l/512")'^-> 0. lmm(l/256")

Counter

Throat

knife

plate

parts

the bottom surface

(Fig.29)

of

throat

higher(1/256") (Refer to Fig,28)

to

Fig.28)

Counter

down

knife

at

Left

direction

the

tip

thread

of

moving

Moving

•Right

plate

knife

Moving

thread

knife

link

knife

Needle

Fig.29

-

16

-

Fig.29»

hole

guide

* When

the

right

thread

is

not

trimmed

*

2) Too

*

* When

Adjust

less

When

Reverse

than

Please

by

when

small

As

by

pinned

of

will

race

the

than

the

0.2mm(l/128")

left

the

0.2mm.

note

making

adjusting.

the

clearance

seen by Fig.30,

0.5mm(l/64"),

between

the

needle

be

torn,

the

thread

but

if

counter

thread

above

(1/128")

that

blade,

the

thread

resulting

there

knife

procedure

the

between

the

but

moving

is

trimmed

are

so

(Fig.29).

is

not

counter

except

@

if

this

after

in

any

that

trimmed

and

make

knife

the

blade

the

needle

part

of

clearance

knife

trimming

this

normally,

and

faulty

remaining

the

slant

the

is

point,

hole

of

slant

constructed

rather

guide

the

of

counter

the

to

and

the needle hole guide

is

too

small,

the

will

stitching

the

thread

needle

be

thread

hole

exceedingly

condition.

does

left

in

be

soft,

the

the

guide

not

the

knife

counter

easier

so

moving

is

thread

and

long

remain

shuttle

will

knife

for

have

knife

cut

diagonally

will

thus,

or

sometimes

in

race,

be

more

adjustment

this

in

be

the

the

shuttle

the

mind

length

it

3)

Inadequate

*

*

defective

condition

When

matching

the

thread

trimming

it

correctly.

Correct

its

thread

inside

(Fig.30)

places

of

Shape

matching

is

can

moving

the

of

of

not

not

route

can

remaining

the

of

"the

caught

be

handling device ®

end

of

the

inner

be

classified

thread:

remaining

»

^

the

moving

moving

thus

performed.

of

the

side

thread

knife

knife

correct

Watch

moving

to

of

the

in

following

(Refer

is

inadequate,

thread

and

knife

pass

needle

B

C

is

the

to

Fig.30)

Trimmed

part

part

match

for

hole.

order

place

of

moving

of

shuttle

according

knife

race

•

Needle

o

Bobbin

to

the

spring

thread

thread

-

17

-

Fig.30

4)

Inadequate

position

of

the

shuttle

race

spring

5)

Skip-stitching

* When

ly.

Needle

*

*

* When

in

the

caught
Adjust

Faulty

Principal

the

the

case

proper

the

by

the

breakage

condition

position

of

inadequate

position

of

the

stitches

the

knife

needle

reasons....*

of

of

last

skip

and

and

the

shuttle

matching

the

shuttle

stitch

at

the

thus

the

shuttle.

This

means

operation

Insufficient

*

Inadequate

last

the

race

thread

the

timing

is

of

the

race

stitch,

(Fig.4)

needle

guide

bad,

moving

spring.

the

will

breaks

of

of

the

not

front

feed

same

knife

(Fig.3)

needle

be

in

faulty

occurs.

thread

trimmed.

the

surface

does

middle

of

condition

Adjust

not

of

sewing

the

driver

it

get

as

to

*

Corrective

1)

Insufficient

* As shown

the

shuttle

Therefore,

2j

Inadequate

*

When

and

adjust

The

point

in

driver,

to

timing

the

cloth

thus

needle

the

standard

has

measures

guide

Fig.4-d,

the

cause

adjust

feed

adjustment

come

*
*
*

of

front

unless

needle

needle

so

that

of

feed

feed

movement does

starts

timing.

down

to

Bruise

Needle

Inadequate

may

breakage.

on
hits

surface

the

be

curved

the

needle

needle

assembling

of

needle

not

to

"flow",

is

to

needle

match so

7'^10mm(9/32'^

the

the

when

will

25/64")

hole

work

driver

is

stop

breakage

that

guide

clamp

of

guided

it

pierces

be

guided

before

the

above

foot

moving

at

the

by means

the

occurs.

feeding

the

knife

front

the

needle

stops

throat

cloth

Refer

end

and

of

the

pierces

to

when
plate.

surface

hits

driver.

the

Fig.15

the

of

the

cloth

and

needle

-

18

-

3)

Needle

* A

hole

needle,

guide

once

broken,

sometimes

bruises

inside

suface

of

the

needle

hole

4)

Hits

*

5)

Inadequate

guide
the

point

The

bruise

with

Also,

are

please

use

the

If

the

foot,

when

extreme

or

due

needle

will

needle

so

a

new

as

there

available

refer

correct

work

needle

needle

changing

caution.

assembling

to

hole

be

caught

hole

easily,

one.

depending

to

ones.

clamp

hits

breakage

are

the

the
guide.

is

heat-treated

but

many

page

foot

the

stitch

curving

of

Unless

again

in

by

case

kinds

on

the

6 No.14 and

work

occurs,

of

clamp

size,

moving

the
this

the

harder

it

of

usage,

so

apply

knife

needle

bruise

bruise

is

bruised

needle

when

causing

than

hole

piercing

is

smoothly

needle

the

needle

toagreater

guide

in

the

cloth,

removed,

breakage.

and

so

it

degree,

combination

Moving

connecting

may

the

needle

should

exchange

with

knife

bruise

not

it

needles

link

(V)

1)

* When

if

the

knife

and

will

needle

knife

CFig.31)

Cautions

Extreme

materials

Thread

removing

installation

connecting

the

needle

hit

the

to

will

on sewing

caution

with

breakage

moving

be

broken

be

should

synthetic

the

knife

link

is

dropped,

bruised.

synthetic

due

to

components,

of

the

is

knife

or

the

be

exercised

thread

heat

moving

forgotten

the

causing

moving

Be

careful.

materials

as

needle

the

for

under:

with

sewing

synthetic

synthetic

Fig.31

thread

or

mixed

synthetic

Due

to

the

to

should

cause

be

the

taken:

resistance

cloth

to

of

be

the

cut

cJoth

or

stick

at

-

19

piercing

by

melting,

-

time,

following

the

needle

corrective

gets

over-heated

measures

*

Change

to a

pulley

for

synthetic

materials(SOHz

B710128000B,

60Hz

B710228000B).

Sewing speed

*

Use

silicon

machine", page 5 and No,7, page 4)

*

Use

super needle for

*

If

a fine needle

effective.

2)

To

prevent the thread

*

During

thread

3) Thread

*

When

the

For

the

guideAtoward

releasing

thread

feed.

adjustment,

adjustmentsothat

4) Bruise on the

*

In

sewing

should

oil

be

lubricant.(Refer to

synthetic

is

used, piercing resistance will be less

from

sewing,ifthe

left

at

start

releasing

occurs

refer to

the

shuttle

synthetic

driver

materials,

1,700

s.p.m.

splitting

thread

and

of sewing

at

the

chapter

feed

stops

spring

INSTRUCTION

materials.

finely

should

make

the

the

start of

on

near

bruise

is

BOOKon"How

split

thread

finely

take-up

sewing,

"Matching

the

10mmC25/64")

liable

the

to

and

or

breaks,

lever

adjust

feed

cam"

rangetobe

be

formedonthe

to thread the

will be

move

stroke

the

timing

and

more

the

bigger.

of

make

effective.

tail

frame

end

of

the

thread

carefully.

5)

Smooth

To

following

*

*

*

* Needle

* Needle

(VI) Inadequate

*

1)

Adjust

out

enable

Shuttle

Shuttle

Shuttle

In

case

the

the

the

parts:

driver

race

hole

bar

thread

of

timing

slipping

When

this

thread

thread

spring

spring

guide

thread

inadequate

guide B1405280000

tension

of

out

happens,

path

to

pass

thread

feed

side

of

the

smooth

smoothly,

B1813280000

B1818280000

B1815280000

B2426280000

tension

shuttle

this out

smooth

out

driver

with

the

spring,

buff, etc.

thread

path

so

watch

of

the

Within

the

effective.

the

range

describedonthe

timingoffeedsothat

Then,

the thread tension

the

chapteron"Matching

feed

-

stops

20

will

-

nearer

become

the

better.

the

feed

7mmC9/32")

cam",

rangetobe

adjust

2) Tension

disc

No.2 and

thread

tension

spring

Make

become

*

1)

Adjusting

Install

left.

Be

When

careful.

the

tension

better.

the

the

the

However,

needle

facing

needle

of

thread

if

both

of

about

it's

of

these

is

intersecting

the

needle

10°

rotated

Intersecting

parts

toward

too

much,

Fig.32

and

left

here

it

the

than

might

tension

the

invite

of

the

standard

skip-stitching.

thread

by

rotating to

will

-

21

-

(CAUTIONSONDISMANTLINGOFPARTS)

1}

Howtoremove

*

When

pulling out the shuttle driver shaft,

for

shuttle

the

driver

shuttle

shaft

driver

with

shaft

crank.

with crank

do

not ever pull out the

knock

2)

This

driver

is

because needle bearings are used

shaft

with

crank

and

will

damage

for

the

the

needle

In pulling out the shuttle driver shaft with crank,

and

the

How

*

The

Remove

main

plate,

pull

When

the

cam,

oscillating

to

remove

main

the

shaft

can

the counterweight, feed

shaft

them

speed

knock

thrust

and

stop-motion

out

toward

decreasing device

pin

screw

as the stop-motion

main

rock

shaft

shaft

hinge

be pulled out without

cam

driving

collar,

tension

rear.

brake

must

release

spring

be

then insert a thick

cam

is

set

tight

pin

and

removing

worm,

cam

and

by

removed

screw

with

roller,

tapping

for

rear

bushing

bearing.

pull

remove

them

the

speed

shuttle

the shuttle driver

out toward

decreasing device.

drive connecting rod,

driving pulley pressing

the

rear

some

driver

an

adhesive agent, then

reason,

between

the stop-motion

of

the

rear.

bushing

first

shuttle

lightly,

remove

remove

it

3)

When

Be

sure

become

the

speed decreasing device

to

remove

damaged.

the

needle

as

Driving

Brake

Fig.33

is

it

might

-

removed

22

pulley

release

collide

-

pressing

adjusting

cam

with

roller

plate

screw

hinged screw

the

moving

knife

and

(HOWTOTIGHTEN

1)

How

to

eliminate

THE

RATTLE)

the

rattle

of

the

Feed

main

cam

0

shaft

2)

*

When

the

direction

greatly

thrust

toward

* Most

* After

tension

How

to eliminate the

wheel

*

When

tension

of

the

To

eliminate

affected.

collar

the

appropriate

tightening

releasing

rattle

releasing

main

Main

shaft

thrust

machine becomes

of

the

main

shaft,

To

tighten

toward the

arrow

direction.

rattle

the

rattle,

timing.

rattle

is

formed

shaft.

this

on the feed

timing

rattle,

collar

Fig.34

old

arrow

(Fig.34)

toward

of feed

will

remove

and

rattle

the feed

and

eliminate

direction

the

main

re-adjust

cam

cam

be

greatly

the

begins

and

while

shaft

the feed

driving

driving

affected

to

be formed toward

the tension releasing timing

this

rattle,

rotating

direction

cam,

worm

worm

and

parts,

just

move

the feed

should

stitch

feed

in

the

the

the

shaft

will

the

main

cam

be 0.01'^0.04mm.

regulating

cam

driving

feed and

case

shaft

strongly

cam

the

of

the

be

and

worm

rattle

driving

Then,

*

the
between

shaft

worm

of

be

cover

and

rotate

of

the

loosen

worm.

press

the

arrow

will

the

eliminated.

direction

the

will

move

main

the

down

feed

main

not

shaft

top

2

become

toward

(Fig.35)

surface

screws

the

cam

shaft

and

of

feed

driving

so

that
and

wrong.

the

the

of

cam

rear

rattle

the

the

worm

the

the

frame

feed

shaft

toward

relation

feed

Then,

bushing

will

-

23

cam

and

cam

the

-

r1

1

—

0

Fig.35

X

w

])

J

After

adjustment,

be

sure

to

tighten

the:

set

screws.

(ADJUSTING

(I)

Adjusting

(A)

1)

Adjusting

When

*

When

will

suchacase

the

adjusting

(Fig.36,

i:

METHOD

the

method

the

the

rotate

position

(D

9 I.I

machine

OF

starting

does

clearance

at

low

rotate

as

screw

36a)

O O O 0

mm

VARIOUS

and

not

of

speed
the

shown

so

that

X Brake

DEVICES)

stopping

rotate

the

driving

but

driving

in

Fig.36a,

the

brake

Brake

(speed

at

it

does

pulley

plate

stopper

plate

decreasing

high

pulley

not

adjust

cork

speed

with

ring

pressing

rotate

the

the

driving

rotates

and

at

hand

stop-motion

plate

high

is

speed

and

when

pulley

idlyl/4^1/2

Feed

cam

too

or

the

pressing

mechanisms)

big,

the

slips.
roller

plate

turns.

Roller

machine

So,

in

came

to

0.8'^'

*

2)

Inadequate

*

I

imm

At

flrrom
does

shaft

When

pedal
pedal

the

the

high

Driving

pulley

Driving

assembling

the

not

the

is
is

main
become

and

shaft,

assemble

starting

position

stepped
stepped

speed.

pulley

presser

Fig.36

time,

even

so

of

on,
on,

plate

when

the

ball

with

the

that

it

the

starting

the

machine

sometimes

Stop-motion

regulating

the ball(@Page

gets
main

won't

the

caught

shaft

lever

does

machine

fall

so

off

stopper

not

in-between

start

skips

33)

apply

from

for the

grease

the

is

bad,

or

depending

the

cam.

Fig.36a

and

main

low

main

the
to

even

speed

clutch

the

shaft.

if

on

shaft

ball

the

the

and

came

surface

for

starting

way

jumps

off

main

the

into

-

24

-

Adjust

the

position

of

the

starting

lever

stopper

so

that

at

the

low

speed

sewing,

the

stop-motion

to

function

clearance

regulating

effectively.

between

cam

roller

(Fig.37)

the

stop-motion

comes

to

lmm(

Starting

regulating

3/64'*)

lever

cam

to

enable

stopper

and

the

the

stopper

* When

so

the

clearance

the

roller

they

might

or

make a "bump-bump"

make

(Fig.38)

the

is

big

catch

clearance

between

at

each

the

stop-motion

other

noise

to

O.Smm.(1/64")

Fig.37

the

stop-motion

at

starting

sometimes,

time,

time

Stop-motion

regulating

latch

cam

groove

and

Fig.38

-

25

-

•Fig.

Stop-motion

38»

cam

*

If

an

unusual

torque

should

bear

on

the

machine

during

running, the

machine

might

speed

machine.

3)

When

*

When

the brake clutch

stop

running

running.

the

machine

the floating

when

Adjust

does not run

the

the

amount(rise)

becomes

inadequate

So, adjust the brake plate stopper so

running

amount

brake cork ring fore

idly

stop-motion

When

of driving

machine

If

the

or at

of

all

high

parts

speed

even.

and

whenitreaches the

time.

the

brake

is

brake

cork

and

af

running

cork ring

ring

stop-motion

at

low

running

And,

aft

extreme

is

speed.

is

too far

low

speed

machinesothat

at

low

of the

running

speed

brake

and

that

is to

no

unusual

plate is

slips.

the floating

comesto1.5mmCl/16")

after

so

that

observed to be stopping

time, the

that,

as

shown

the stop-motion latch begins to rotate

outer

worn

rim

of the stop-motion

brake

is perfectly functioning

out to be adjusted,

be

switched

torque

too

big, the biting of

amount

and

make

over

is

borne

at

either

the floating

to

by

in Fig.38', adjust the

cam

at the

momentarily

at the

start

and

exchange

it

with a

high

the

idle

the

new

one.CFig.36,

*

In

height

*

Whem

will

case the

oil

not

brake

of

the spring to

and

grease

enter

into

to driving clutch also in

(Note)

*

slipping

Do

not use thinner or trichlorothane as they

brake

When

driving clutch

In such a

the

main

sound.

cork.

the returning

does

case,

shaft

and

the driving belt is too strong,

the

tension

Generation of unusual noise
*

When

the clearance of the pulley pressing plate

of

the

Fig.38')

spring

etc. are sticking to the

is

8mmC5/16")

low

speed, so

too

which

weak,

case

it

or exchange

wipe

if

too will

them

brake

off

slip,

it

with a

cork

with alcohol. This holds

oily matter sticks to

impede

power

not separate

either

of the spring for the the

and

the

machine

exchange

the

spring

or

main

will not rotate at

insert

adjust the strength of the spring. Also,

sometimes

belt.

the spring will not return,

is

too narrow, the driving

so either adjust the

new

one.

ring

it

might

it,

it

produces

slip

the function of the

shaft is

weak,

low

a washer

into

if

the hole

the tension of

so

true

the

speed.

adjust

and

of

a

t

clutch

bearing

will

at high speed,

will

to

slip

generate

enter

during

refer

out.

at

low speed running, causing the

As a

idle

to 1) of

result,

running.

this

-

the

Therefore,

chapter

26

-

ball

and

will-be

when

make

outer

bruised

the

proper adjustment.

ring

and

machine

inside

unusual

is

to

the

be

noise

run

*

Unusual

When
of

like

To

the

*

The

*

The

correct

the

cork

a

squeaky

cause

cause

noise

surface

this

is

of

of

from

of

small

sound

this

this

unusual

the

cork

the

and

generates.

sound

sound

cork

when

at

at

sound,

of

the

starting

starting

stopping

remove

clutch

is

time

time

the

is

oscillating,

stopped,

is

is

723

cork

and

sometimes

38

of

rof

with

the

Fig.39-1.

Fig.39-1.

a

sand

contacting

an

unusual

paper

make

area

noise

the

contacting

* Even

the

Use

grease

* Even though

timing

main

stop-motion

bruised

refer

5)

Generation

*

If

the

pulley

refer

and
is

big

surface

if

dust

gets

ball

will

of

lithium

the

is

such

shaft

is

cam

and

the

to

page 26 3) and make

of

unusual

floating

and

at

to para.3) of

make

proper adjustment. This

and in

wider.

into

be

bruised.

group

stop-motion

that

the

trying

to

is

interlocked

sound

of

heat

amount

high speed

this

this

case

the

grease

So

consistency

hook

brake

rotate

speed

proper

of

the

running,

chapter on

refer

or

be

careful

is

caught

plate

at

to

is

low

the

decreasing

adjustment.

brake

is

this

"When

also

to

the above

the

quality

when

No.2

biting

speed,

assembling.

for

this

in

the
into

it

hook and thus

device

not

uniform

unusual

heat

the machine does not run

happens

when

para,

of

grease

purpose.

stop-motion

the

cork,

can

not

rotate

the

ball

becomes

at

both

generates.

the

oscillation

on "Unusual

has

loud.

idle

become

cam,

then

even

because

bearing

In such a

running

In such a

noise

if

will

at

of

from

inferior,

the

if

the

the

be

case,

of

the

case,

low

speed"

the cork

the cork"

and

*

If

hard

generates
very

capacity

*

How

Refer

6)

Stop-motion

correct

too

much

grease(high

also.

lightly

of

to

apply

to

the

sound

this

defect.

grease

consistency

In such a

to

the

the

driving

grease

following

is

is

outer

big

poured

ring

ring

chapter

(Fig.39)

into

the

number)

case,

apply grease

inside

long holeCS

on "Assembling

ball

is

the

bearing

used

ball

places).

for

at

assembling

of

lithium

decreasing

time,

group consistency

the

unusual

bearing and apply about 1/5

the

speed

decreasing

unit".

speed

heat

or

No.2
of

-

27

-

* When

the

clearance

between

the

stop-motion

lever

and

the

stop

ring

rod

latch

is

small,
by

the

ring

*

Correct

cam

so

stop-motion

*

Also,

into

para.3)

adjustment.

the

stop

stop-motion

rod

latch

stop-motion

that,

at

at

the

low speed

above on

link

and

and

the

at

the

the

same

end

of

step,

"When

Stop-motion

rod

latch
generates
stop-motion

timing

last

stitch,

time

sewing,

thus

the

into

hits

sound,

lever

can be

the

as

obtained

the

it

passes

high

generating

machine does

goes

action

the

stop-motion
so

to

stop

ring

the

speed

adjust

14mm(9/16").

by

adjusting

stop

running

rod

lever

the

clearance

latch

ring
suddenly

the

rod

shock sound. In such a

not

run

at

low

speed"

Stop-motion

cam

by

the

stop-motion

cam

part

latch.

stops

case,

and make

shock

between

enters

without

refer

produced

the

stop

regulating

into

entering

to

the

proper

Stop-motion latch

Fig.39

Stop-motion

lever

-

28

-

(B)

Assembling

the

speed

decreasing

unit

This

of

chapter

parts,

refer

treats

to

only

the

the

parts

assembling

list

for

order,

LK-280

and

so

for

the

construction

names,

construction

diagram.

etc,

that

grease

to

ring.

grease

much

that

balls

Cautions

all

and

grease

carefully.

there

Assembling

ordei

1.

2.

3.

1.

Note

Apply

Refer
thrust

Apply

capacity

2.

If

N)

CO

3.

too

so

watch

Verify

in

the

on

parts

to

Fig.39-1

the

are

needle

to8long

set

the

is

are

or

inside

assembling

concentric.

bearing

for

inserting

holes

balls.

applied,

no

dust

and

outside

to

heat

or

parts

about

foreign

rings.

the

will

1/5

generate,

matter

1.

2.

Cautions

Verify
the
If

something

with

balls

new

that

and

ones.

on

dismantling

there

inside

is

wrong,

are

no

and

exchange

bruises
outside

on
rings.

them

1.

Put

the

2.

3.

pushing

clipped

Watch

Verify

through

lower

in-between

out

that

the

for

end

push

the

all

shaft)

parts

on

top

of

in(2) . ( ^

byaplier).

balls

which

are

the

base

and

and

@

may

jump

concentric.(Pass

may

out.

by

be

them

1.

By

pushing

(T)

and by gouging between

Q) and (y) , with a screw

2.

remove

Watch

jump

out

out.

©•

for

the

balls

driver

which

might

♦

•>

Assembling

C/l
o

order

1.

Insert

setting

surface,

2.

Be

sure

the

outer

3. Attach

not

rotate.

4.

Order

1.

Assemble
Be

sure

inserted

2.

As

oil

bruised

Cautions

needle

the

insert

that

outer

of

thrust

in

that

into

seal

or

set

dented

on

and

thrust

outer

circumference

the arrow

the

groove

screw

set

screw to © so

ring

order

is

the

the

very

of

circular

groove.

sensitive

ones.

assembling

ring

part

of

© and

match

is

explained

circular

clip

to

@ and by

of

of

^ evenly.

each

that

in

clip

is

completely

to

heat,

the

the

other.

page

and

bottom

center

©

will

oil

do

not

seal.

of

use

Cautions

1.

After

of

removing

© )

2. Hold the

lightly

side

of

1.

When

pulling

likely

have

new

on

poll

outer

hitting

insertion,

out

to

be

bruised

one

ready

dismantling

the

outer

out © .

rim

of

it

from

pull

the

for

set

© and by

the

it

out

oil

seal,

or

dented

replacement.

screw

opposite

©.

it

so

is

1.

In

2.

attaching

side

Eliminate

and

be

easily

of

the

corks,

the

figure

all

bruises

circumference

interlocked.

should

on

of

6

the

cork

be

setscrews

tightly

inside

so

that

screwed

diameter

they

of

left

in.

of

can

Assembling

Cautions

on

assembling

Cautions

on

dismantling

1. Apply grease

2.

Assemble

inserted to the hole of

3.

Apply

of 0

plenty of grease to 3 places of the

(figu^®

to

the

so that the

shows

needle.

f£b

part of 0 will be

0.

the

back

of 0 •

4. After assembling, verify that 0

1.

2.

Insert

Apply

the

cDa

part

of

©

grease to the needle.

to

side)

and

moves

the

holeof© -

groove

3 holes

smoothly,

1.

When

2.

® is to

caught

sure

Be

means

shaft.

to the

that

sure to verify that

of the spring

it

be

inserted, ® is liable to

hinged

is

part of the shaft, so

concentric.

and

10

returns

smoothly

balls inside the

be

be

by

main

HOW

TO

*

REFILL

Refill

THE GREASE

the

grease

at

least

once

in2years.

* Use

* How

NAMES

ESSO

SHELL

grease

to

Remove

up

the holes with grease

grease.

Repeat

speed

OF GREASE TO BE USED

kerosene

kerosene

decreasing

of

refill

@

(Fig.54).

this

lithium

and

after

process

device.

Listan

Albania

family

removing

of

consistency

the

spring

and

push in hard with

3 times and about 2

2.

Beacon

2

CC

No.2.

and

of

balls in

screw

grease

the

for

will

main

refilling

be

refilled

shaft,

the

fill

into

the

-

32

-

w

Ui

(II)

Adjusting the pedal pressure decreasing

— -

unit

(A)

ASSEMBLING

METHOD

When

the assembling

adjustments

be

treated

are

here

easy,

first.

method

so

is

clearly

the

assembling method

understood, the

will

Assembling

order

1.

Attachascrew

spring.

1.

Install

gear(small).

Be

sure

thrust.

Cautions

pulley

that

on

assembling

^ for catching the

and

there

pressure

is

no

decreasing

rattling

on

1.

Verify

bruise

This

gear(large).

Cautions

existence

on

also

on

disassembling

the

gear

applies

or

non-existence

surface.

to

the

pressure

of

decreasing

1.

Install

by

rotating

until

contacts the spring washer (2).

2. Apply

of

sufficient

the

interlocking

grease

part

to

tUJdd.

of

the

the

the

end

inner

surface

spring.

rim

1.

Remove

the

arrow

the

spring

direction.

by

rotating

it

toward

on

Assembling

4 (2

order

1.

Assembling

sketch.

2. After

matching

by the figure,

the

arrow

3.

Apply

rim

sufficient

of

Cautions

in

the

direction.

except

on

assembling

order

the

end

assemble

grease

the

as

shown

by

the

above

of spring with ^ as

by

rotating @

to

the

gear

wheel

outer

part.

toward

and

inner

shown

1.

When

decreasing

it

Cautions

removing

toward

on

dismantling

the

gear(large),

the

arrow

pressure

direction

rotate

also

1.

Set

it

Knock

pin

2.

3.

and

insert

Hammer

Remove
pin

of

to

in

scratch

knock

.

as

.

from

shown

pins

in

to2places.

the

hole

the

above

part

of

sketch

knock

1.

To

pull

out

the

screw

pull

direction

and

it

out

the

knock

out

pin,

by

tapping @ lightly,

toward

of

the

first

loosen

the

arrow.

pull

the

reverse

V F

Assembling

o^

order

1.

2.

1.

2.

Wind

lever(rear

R

part

toward

Verify

Adjust

position,

rotate

time

toward

to

such

sketch.

After

the

tightening

incorrect.

the

and

the

if

as

idly

position

the

Cautions

c£h

part

side
set

it

arrow

the

lever

follows:

the

pressure

and

adjust

the

arrow

adjustment,

is

on

assembling

which

in

the

to

the

direction.

moves

When 8

decreasing

direction

of

No.9-B

tighten

inadequate,

is

caulked

figure),

lever

smoothly.

comes

7

and

or

to

catch

by

push-opening

to

gear(large)will

8

at

so

that

C,

as

shown

the

9

the

phase

the

it

No.9-A

the

same

2

screw.

becomes

to

comes

in

the

the

If

Cautions

on

dismantling

3.

Rotate

and
decreasing gearClarge)

touching

means

re-adjustment

the

verify

the

pulley

if

it

with the hand.

9

toward

is

No.9-B and C

must

be

stopped

is

are

made.

the

normal

when

rotating

If

defective,

direction

the pressure

idl>^

it

is

wiggling,

so

by

it

CB)

ADJUSTING

1)

When

[i)

METHODS

the

work

Verification

The

correct

clamp

of

foot does not

phase

phase under

of

the

work

various

condition as

parts

properly

shown

Phase

of

various

parts

[ii) If

[iii)

in Fig.41 should be as

there

do

not operate

with hexagonal

is

no

is

given,

carefully.

Verification
When

lifting

clearance,
and

return

is a

clearance.

gear

returning

lever

the

sometimes

properly.

clearance

properly,

holes

If

noise

of

work

spring

is

too

reaction

the

work clamp

shown

between©

so loosen

and

adjust

too

much

will

emanate, so watch

clamp

of

the

weak

or

of

in Fig.40.

so

thrust

foot

lifting

work clamp

there

the

lever

foot

does

and

the

that

is

® ,

screw

rattle

a

is

not

there

lever
foot

dull

they

^

Work

clamp

foot

^ lowering shaft

^ Decreasing

Cy

Decreasing

©

clutch

latch

inner

sleeve

^ Decreasing outer

Cy

sleeve

Fig.41

Work

lifting

Work

lifting

clamp

Work

lifting

clamp

lever,

foot

lever

clamp

foot

foot

lever

guide

returning

plate

Fig.40

spring

-

37

-

2) When

(i)

In

*

noise

case

Verify

generates

of

gear

the

respective

noise

(

thrust

rattle

of

large

and

small

gears.

When

*

Also,

generates.

(ii)

In

*

Verify

If

3)

Other

* Following 3

of

Ci) Large

* Diameter

new

(ii)

Unusual

*

When

the

thrust

when

case

of

that

this

malfunctions

these

relationship

malfunctions

gear.

of

one.

condition

the

inside

rattle

dust

or

foreign

So

watch

tearing

all

components conform

carefully.

noise

is

malfunctions

is

Abrasion

shaft.

of

of

If

clutch

diameter

is

big,

matter

inadequate,

can be

very

slight.

interlocking

it

becomes

spring

became

gear

noise

is

stuck

to

tKe

a

tearing

considered

part

less

over

18.9^orwhen

generates.

on

the

relationship

noise

but

it

of

spring.

than

19.2

gear

emanates.

is

opined

exchange

the

surface,

of

No.Q-A'vC.

that

spring

gear

occurrence

it

with

power

noise

a

is

weakened,

exchange

it

with

a new

one.

-

38

-

(Ill)

1)

Adjusting

Matching

the

the

moving

thread

trimming

knife

device

* The

*

correct

At

the stop-motion time, the clearance

and

the

When

this

position

end

of

position

screw and by moving

the

correct

position.

Thread

connecting

the

of

the

needle

is

incorrect,

the

(Fig.42)

trimming

moving

hole

thread

screw

0
0

knife

should

is

as

between

be

1,5mm(l/16").

follows:

the

loosen the thread trimming

trimming

lever

lever(small)

Thread

Moving

trimming

knife

tail

back and

link

end

of the

lever

forth

lever(small)

moving

knife

connecting

adjust

to

2)

How

The

last

or

when

too

small

decreasing

device

to

adjust

correct

stitch

thread

or

are

the

thread

movement

but

if

the

trimming

for

any

device

dimensionally

and

of the

moving

is

other

verify

trimming

moving

knife

not
reason

if

correct.

Fig.42

device

knife is

activates

performed

if

unusual

all

the

due

related

performed

between

to

the

stroke

defect

occurs,

components

between

the

low

of

of

215°~'357°

speed

the

remove

the

sewing

moving

the

thread

of the

area

knife

speed

trimming

is

-

39

-

(1)

Verification

of

position

of

cam arm

releasing

plate

No.l

Release

minimum

caliper

the

main

cam arm

the

stop-motion

radius
and when

shaft

releasing

l:

position

the

is

made

plate

lever

of

distance

to

23mm(29/32"),

and

cam

the

tension

roller

between

cam

m

spring,

and
the

roller

Slide

Main

Cam

Cam

as
stop

verify

B

caliper

shaft(14

Cam

arm

match

shown

link

if

is

0.5mm(l/64")•

roller

roller

releasing

in

the

A

B

the

Fig.43

rod

clearance

cam

latch

plate

roller

contact

and

(Fig.43)

A

the

between

to

a

slide

end

the

of

the

*

If
cam

is

*

If

this

the
therefore

(2)

Verification

With

stop-motion

that

of

the

in

*

When

*

Conversely,

this

roller

forced

stroke

the

there

Fig.45.

this

clearance

A becomes

to

clearance

of

sometimes

stop-motion

regulating

is

maximum

clearance

when

activate.

the

of

position

a

clearance

radius

is

is

moving

it

is

this

bigger

less

less

and

than

knife

happens

of

lever

lever

of

of

the

big,

clearance

Fig.43

than

0.5mmCl/64"),

at

low

speed

0.5mm(l/64")^

which

that

cam

arm

tension

is

placed

0.7w0.8mm(l/32")

thread

the

starting

is

is

the

releasing

spring

trimming

less,

sewing,

necessary

thread

in

at

the

pedal

sometimes

the

it

becomes

is

plate

set

condition,

position

between

cam

and

becomes

tension
sometimes

impossible

for

thread

not

trimmed.

No.2

shown

the

the

heavy.

the

moving

releasing

the

trimming

and

in

outer

cam

roller

moving

to

when

Fig.44,

circumference

as

knife

activates

amount

knife

obtain

and

the

verify

shown

of

in

the

low

speed

sewing

zone.

-

40

-

0.7'^0.8mm

Fig.44

All

of

above

to

prevent

to

inadvertant

The

cam

arm

and adhesive agent

take

it

out.

related

dimensions

malfunctions

inadequate dimensions, exchange

releasing

Also,

to

when

plate

produce

emergency measure must be
latch
This

purely

from 3mmCl/8")

is

an emergency measure

as

an

emergency

to

measure

are

carefully

but

should any

is

set

to the stop-motion lever by screw,

correct

the

knife

taken,

activates

adjust

4mmC5/32"), as

to

prevent

only.

Fig.45

checked

malfunctions

the

dimensions, so

within

the

clearance

shown

the

in

Fig.46.

knife

Stop-motion

from moving

at

the

occur

in

time
the

of

assembling

open market due

stop-motion lever(B26012800AO)

it

is

the

low

between

regulating

roller

knock

very

difficult

speed zone and an

the

but

shaft

stop

consider

lever

link

nut

pins

to

rod

this

Fig.46

-

41

-

C3)

Verfication

*

Verify

When

this

if

of

tension

the

spring

tension

is

spring

spring

not

set

for

knife

for

knife

properly

driving

driving

or

worn

out

rod

rod

is

and

functioning

the

necessary

normally.

spring

CIV)

pressure

it

is

trimming

Therefore,

Adjusting

* As

shown

of

low

latch

When

trimming,

action

Therefore,

* The

regulating

shaft

of

impossible

becomes

the

in

speed

should

this

of

position

to

right

4.53kg
to

inadequate.

it

is

very

position

Fig.46,

sewing

be

3mm(l/8").

relative

inadequate

the

safety

verify

of

the

lever

roller

and

+

0.5kg(overall

obtain

important

of

the

correct

zone,

position

movement

device,

the

correct

stop-motion

shaft

left

within

normal

the

stop-motion

the

is

etc.

length

function

to

verify

position

clearance

wrong,

of

speed

occur.

position

lever

nut

and

the

area

99mm(3-S7/64"))

of

the

the

condition

lever

of

the

between

such

malfunctions

decreasing

of

this

can be

move

of

adjusted

the

the

moving

stop-motion

the

stop-motion

components

stop-motion

by

stop-motion

long

groove.

can

knife

of

the

lever

as

inadequate

and

lever.

loosening

regulating

If

not

be

and

tension

at

cam

inadequate

it's

obtained,

thread

spring.

the

time

and

the

stop

thread

stop-motion

roller

moved

(V)

toward

cam

and

When

Adjusting

*

The

standard

so

that

of

the

However,

hole

screw

the

the

you

the

when

bobbin.the

on

the

and

arrow

do

when

adjust

direction,

stop

link

this,

thread

adjustment
the

last

the

upper

by

rod

leave

the

tension

is

stitch

No.2

tension

following

left

side

raising

the

clearance

latch

becomes

stop-motion

release

for

the

needle

disc

phenomenon

of

the

the

tension

thread

thread

will

cam

between

wider.

lever

tension

loop

be

occurs,

cover,

release

tension

has

released.

insert

loosen

lever

the

stop-motion

spring

release

slipped

a

the

up

lever

screw

tension

and

in

out

driver

down.

regulating

the

set

to

be

from

release

(Fig.47)

condition,

set

the

from

comer

the

hinge

-

42

-

The

standard

length

of

the

needle

thread

is

35~40mm(l-3/8"-«^l-37/64")

No.

1

2

3

4

Condition

needle

Too

thread

long

Disarranged

Jumps

short

Breaks

up

length

in

midway

Tension

Tension

of

in

Tension

Raise

Lower

release

release

release

hinge

it

it

lever

latch

Tension

Lower

Lower

Raise

Raise

lever

screw

release

it

it

it

it

Tension

tripping

lever

release

segment

link

Fig.47

Tension

Adjusting

for

tension

release

screw,

release

leverfAQ.

latch

\

Outer

Fig.48

-

43

rim

of

feed

-

cam

* Adjust

the

end

of

the

tension

release

latch

by

means

of

the

tension

release

(VI)

latch

a

end

*

If

release

Adjusting

1)

Adjusting

*

If

shorter

adjusting

clearance

and

the

the

adjustment can not be

lever,

the

the

screw so

of

0.2~0.3mmCl/I28"'v

feed

adjust

feed

bartacking

the hinge nut

and

if

it's

that

cam.

components

is

(Fig.48)

by means

length

loosened and

lowered

during the running of the machine,

made

of

down,

1/100")between

within

tension

raised

it

the

adjusting

release

up, the bartacking length

will

become

the

link

longer.

tension

area

tripping

(Fig.49)

of

there

release

the

tension

segment.

will

will

latch

become

be

2)

Adjusting

*

Loosen

spanner

of

If

and

the

bartacking

the feed regulator

into the

the

bartack.

it's

rotated

if

it's

rotated

thickness

hexagonal

zoward

left

toward

Fig.49

knob

nut

and

patt of the

direction,

right,

it

by

inserting a double face

feed

the

becomes

Feed

knob

L/

Feed

knob

Longer

Hinge

regulator

bartacking

thinner.

regulator

nut

regulator

nut

knob,

adjust the

thickness

(Fig.50)

14mm(9/16")

thickness

becomes

thicker

-

44

-

Fig.50

*

When

3)

Adjusting

*

With

the

the

adjustment

the

left

large

bartacking

is

and

completed,

right

indicating

machine

be

of

sure

to

tighten

linesCFig.51)

42

stitches,

the

the

26th

knob

stitch

nut.

comes

to

the

center

that

matching

(For

*

If

driving

feed

adjust.

*

The

joint
will

of

the

bartacking

they

across

standard

is

be

Feed

Feed

driving

the

stitches,

matching

with

point

each

machine

are

not

matched

stud(left)

connecting

concentric

S0mm(l-31/32")

small

across

driving

across

stud(left)

and

if

connecting

so

of

other.

of

with

set

screw

driving

between

but

it's

connecting

studCleft)

set

rotate

the

work

28

stitches,

each

and by

stud(left),

the

please

shortened,

screw

the

clamp

other,

inserting

shuttle

note

the

machine

foot

18th

loosen

rotate

that

stitches

to

stitch

a

driver

if

and

the

bar

it's

the

the

is

feed

into

it

shaft

will

26th

stitch

center

the

center)

across

the

to

right

with

lengthened,

become

and

of

the

connecting

open

and

crank

the

big.

verify

needle

hole

left

and

stitches

(Fig.51)

of

and

the

are

the

ball

4)

Adjusting

* Be

work

sure

to

clamp

the

Feed

fore

verify

foot

across

and
that

or

the

driving

Fig.51

aft

the
feed

arm

indicating

needle

plate.

Work

clamp

base

lines(Fig.52)

is

dropping

foot

set

screw

Shuttle

with

uniformly

mounting

crank

driver

shaft

concentric

without

hitting

Fig.52

the

Feed

plate

set

screw

A

-

45

-

*

If

the

fore

and

aft

indicating

lines

are

incorrect,

loosen

the

feed

plate

set

screw and

must be tightened

[Caution)

When

and

the

be

Very

the spring

the

work

work clamp

careful

when

(l)

of Fig.52 is taken off, be sure to create a clearance of

0.1'S'0.2inm(l/256"'N/1/128")

there

(VII)

is

no

Adjusting

*

To

adjust the fore

screw

of

driver shaft

clearance

the

shuttle

shuttle

and

race

adjust the fore

clamp

foot

back and

securely

tightening.

between

here,

and

the

race

aft

on

foot mounting base

but as

the @

feeding

forth.

the

After

feed

and

becomes

direction of the

the

right

and

front

aft

Shuttle

clamp

side

direction of the shuttle race. (Fig.53)

set

the

plate

the

lower

heavy.

shuttle

of

driver

screw

screw and

adjustment,

is

made

adjust

of

surface of the

race, loosen the

the

bed,

shaft

all

aluminuim

rotate

the

set

the

feed

screws

material,

cam.

If

clamp

shuttle

plate

*

When

pulled

is

out,

shuttle

side of

race.

*

In

"jClamp

,rof

scre^

shuttle" race / \

n

lJ

Shuttle

Fig.53

removing

out

inserted into the hole of the

it

can

race

bed,

order

the shuttle race, note that unless the shuttle driver shaft is

it

can

not

be

removed

be

pulled

is

withametal

to

prevent

connected to

out

easily.

tool,

scorching,

the

7

driver

but

if

the shuttle driver shaft

shuttle

Also,

oil

remove

driver shaft

as

wick,

this

a shuttle for

shaftj

the oil

which

metal

exclusive

clamp

clamp

wick

is

coming

and

then pull out the shuttle

use

screw

and

for lubricating the

out

from

of

LK-280

screw

pulled

the

rear

series is

adopted

of

part

but

shuttle

of

the

be

sure

when

and

also about 1/10

bed

installing

unpacking

of

base.

-

to oil

the

46

oiler

-

one

drop

of oil to

in the accessory

the

box

race

to the

surface

felt

(VIII)

Adjusting

*

The

the

height

height of the

work

of

clamp

the

work clamp

foot can be adjusted

foot

from

6^15inm(15/64'vl9/32") so

adjust

*

To

and

*

To

condition

pressure

the

make

rotate

height

this

adjustment, loosen

the

in

stud.

adjust the height, stop the

(stop

decreasing pedal) and

the

because the height of

tfork

\

clamp

fork

foot

stud

consonance with

(Fig.54)

motor when

the

lowering

set

the

work

nut

the

work

machine

work clamp

in

this

clamp

the

sewing

materials.

clamp foot lowering fork

with the

condition

work

foot

has gone up by

it

can be

clamp

foot in raised up

easily

foot can be observed while

stud

set

stepping

adjusted

adjusting.

on

nut

the

(IX)

Screw

2

Adjusting

* The

standard

the

height

position

13mm(33/64") away from

point

* To

screw
moving

within

*

In

careful

the

of

the

adjust

of

the

the
the

adjusting

of

needle.

needle,

the

wiper

wiper

area

the

hitting

height

of

for

of

the

of

the

the

of

installing

installing

the

long

height

against

applying

Fig.54

wiper

the

needle

clearance

the

wiper,

plate

groove.

of

the

the

grease

wiper

should

at

should
loosen

plate

up

wiper,

work clamp

the

and

and

be

be

for

stop

adjust

down

extremely

motion time and when

be

1.5mm(l/16")•

the

foot

by

or

the

wiper

Wiper

to

be

(Fig.55)

installing

set

about

it

screw

passes

plate

the

-

47

-

Fig.55

(X)

Adjusting

the

safety

device

* The

correct

When

the

toward

andaclearance

plate

At

so

safety

left

and

this

that

adjustment

Stop-motion

Stop-motion

adjustment

stop-motion

and as a

of

the

work clamp

time,

there

make

will

driving

latch

of

the

activates,

result

Imm

and

2.2mmC3/64"

foot

adjustment

beaclearance

plate.

lever

lever-*

r!--

(Fig.56)

/

Work

lowering

ii

slide

safety

device

is

the stop-motion

the

safety

lowering

by

loosening

plate

and

slide

of

0.3mm(l/64")

is

5/64")

plate.

the

ySafety adjusting plate

clamp

foot\Work

\ /safety

plate

\

as

follows:

lever

pushed

is

safety

between

clamp

driving

out

toward

created

adjustment

foot

between

the

lifting

adjustment

gg-j-

lever

plate

safety

plate

screw

is

right

lever

pushed

direction

the

set

plate

safety

screw

and

Clearance between

This

clearance

can

the

not

decreasing device, so

First

and

the

Consequently, the
Next, step

between

rod

If

come

clamp

of

all

step

while stepping

pressure

latch

this

off

foot,

decreasing

on

the

the

stop-motion

is

2.5'v4mm(3/32'*'5/32")

clearance

and even

there

on

on

work

starting

is

during

is

work

be

seen

verify

Fig.56

clamp

by

as

Safety

foot

the

lowering

it

is

obstructed

following method:

plate

plate

by

and

the

the pressure decreasing pedal, raise

the pedal turn

pedal.

clamp

foot will

pedal

cam and

too

big,

the

a danger

cam

rising

of

off

the

motor

remain

and

at thid instant verify

the

stop

CPig*57)

and

latch

of

the

starting

link

will

work

of

in raised

the

switch

safety

pedal

up
and

up

position.

2.5~4mm

plate

pressure

the

work

after

if

the clearance

that release

clamp

foot

machine.

After

plate

In

the

verification,

to

the

suchacase,

standard

adjusted

exchange

adjust

the

the

safety

figure.

-

48

-

safety

adjusting

plate.

Fig.57

(XI)

Adjusting

*

When

bend

In

the

the

the

the

bobbin

bobbin

bobbin

reverse

thread

winder

case,

thread

base

bend

is

winder

not

toward

it

toward

wound

uniformly

the

arrow

the

direction.

opposite

and

direction

leaning

to

of

one

side(Fig.58},

the

arrow

and

adjust

*

amount
arrow

The

to

standard

is

direction

wind

Bobbin

more

it

Fig.58

amount

than

and

evenly.

winder

of

this,
if

wound

it's

base

screw

less

thread

the

than

is

bobbin

this,

80%

of

winder

reverse

the

Bobbin

adjusting

Fig.59

bobbin

adjusting

this

winder

diameter

screw

action.

screw

but

toward

(Fig.59)

if

the

the

*

Bobbin

In

has

Therefore,

only.

case

order

adopted

*

*

to

boost

a
to

Bobbin

Bobbin

and

special

prevent

bobbin

up

case

the

sewing

dimension

sewing

B18282800A0

B1827280000

efficiency

bobbin

case

malfunctions,

of

and

be

synthetic

bobbin,

sure

to

thread,

use

genuine

LICt-280

JUKI

series

parts

-

49

-

CXII)

Adjustment

*

First,

of

adjust

the

the

V-belt

tension

of

the

driving

pulley

side

by moving

the

slide

base

*

CXIIIj

*

up and

decreasing

Be

belt

Dismantling

down

side

sure

to

is

somewhat loose

Whenanoil

open

the

cover

felt

and suck out only

In so doing, be

pulled

So,

do

out,

not

it

ever

and

after

by

adjust

the

other

on

can

moving

so

silicon

than

top

of

careful

not

pull

this

that

that

than

oil

silicon

the

the

for

be

adjust

the

pressure

the

tension

the

belt

tank

oil

frame

long

felt

if

the

re-inserted

out.

the tension of the

decreasing

of

the

of

the

driving

is

poured

withascrew

inside,

long,

again.

which

thin

unit

pedal

into

driver,

felt

belt

frame up and

pressure

pulley

the

silicon

take

is

sticking

inside

of

the pedal pressure

down.

decreasing

side.

oil

tank

out

the

cylindrical

out,

with a

the

silicon

pipe

side

by

error,

rag.

is

-

50

-

(XIV)

1}

Notable

Lock

tight(nut

places

on assembling and disassembling

lock)

set

parts

No.

3.

When

all

1.

2.

assembling

oily

1100

(1100-1199)

1500 (Work clamp

(1500-1599)

'1800

(1800-1899)

substances and

Category

(Exterior

(Shuttle

crahk

components)

and

disassembling the following

set

Part

with lock

Number

tight(nut

components)

B1125280000
B1126280000

B3114771000

foot

components)

SD0790431SP

SD0640602SP

SD0720331SP

NS6150310SP

driver

shaft

with

parts,

lock).

Part

name

Tension

Silicon
Thread

Work

plate

Work clamp

link

Hinge

lever

Hinge
lowering

thread

oil

take-up

clamp

hinge

screw

screw,

screw,

foot

foot

lever

be sure to eliminate

guide

pipe

guide

lowering

screw

lowering

for

lowering

nut

for

Qty.

1
1
1

2

2

1

1

SDOamo^lTP
NS6660430SP
PT0301600SH

•

4.

2400

(Thread

SS8110320SP

trimmer

components)

Crank

Crank

Shuttle

taper

Shuttle

set

screw

rod

rod

pin

hinge

hinge

driver

driver

screw

screw

shaft

shaft

nut

crank

crank

1
1

1

1

(2400-2499)

B2409280000

B2417280000

PS0300132KH

SS6111140SP

NS6120310SP

SD0650305SP

SD0790303SP

Knife

link

Moving

lever

Cam

lever

plate

Cam

lever

set

screw

Knife

Knife

screw

Knife
link

driving

mounting

lever

shaft

returning

pin

returning

driving

driving

driving

hinge

bar

base

driving

bar

bar

bar

screw

connecting

plate

nut

hinge

connecting

1

1

2

2

3

3

1

-

51

-

5.

2500 (Feed

components)

(2500-2599)

6.

2600

(Stop-motion

components)

(2600-2699)

3000

(Pedal

unit

(3000-3099)

2) Grease applying

When

assemblingordisassembling

B2618280000

NS6150440SP

NS6150310SP

pressure

components)

B3023280000
SD0640324TP

places

SS6110620TP

mechanism

B2602280000

decreasing

the

following

Work

lever

clamp foot

set

Stop-motion

shaft

Stop-motion

shaft

Pressure

nut(large)

Pressure

nut(small)

Pin,

for

stopper

Stop-motion

plate

hinge

parts,

screw

lever

lever

spring

spring

lever

screw

be

sure

lifting

installing

installing

adjusting

adjusting

driving

to

apply

grease

(lithium

No.

1.

2.

group,

Category

1200 (Main

consistency

shaft,

components)

speed

(1200-1299)

B12**280010

2500 (Feed components)

No.2).

Part

Refer

number

decreasing

to

page

Part

Speed

ing

for

name

decreaS"

assembly

applying

Frictional

except

2cc

from

every

grease.

Remarks

to

main

2

cork

be

years

surface

surface

applied

shaft

(2500-2599)

B2534280000

3.

•

2600

(2600-2699)

(Stop-motion

components)

machanism

B26162800A0

B2618280000

Ball

connection

Stop-motion
regulating

lever

Stop-motion

regulating

lever

joint

shaft

Apply

on

left

carrier

Tip

of

condition

Outer

lever

from

felt

rim

shaft

side

bar

of

the

of

the

hole

feed

-

52

-

4.

3000

(3000-3099)

(Pedal

unit

pressure

components)

B3004280000

B3014280000

decreasing

Pressure

gear(large)

Pressure

shaft

decreasing

decreasing

(Apply 2cc every 2

years

)

Inner

groove

Grease

screw

of

shaft

rim

part

from

part

of

enc

(MANUAL

(1)

FOR

Model

Model

LK-280

LK-282
LK-283

LK-284
LK-285

LK-286

LK-287
LK-288

LK-289

LK-290

LK-291

LK-292

REMODELLING

numbers

number

and

THE

number

No.

SUBCLASSES)

of stitches

of

stitches

(When

1/2

Worm

is

used)

Parts

code

Remarks

Standard

bartacking

large

machine

(2)

Relation

Sub

Sub

(3) Remodelling

To

direction

of

No.

No.

remodel

of

subclass

the

subclasses

the

standard

page

54

numbers

N0.1M99

Over

No.500

and

the

frame

Standard

Special

i

machinetosubclass

-

53

-

frame

frame

machines,

follow

the

arrow

REMODELLING

Exchanging

Feed

cam

Feed

plate

Work

clamp

Work

clamp

WI'lHIN

Part

foot(right)

foot(left)

SAME

STITCH

Blank

part

available

••

" '•

NUMBER

Remarks

Refertousage

of

blank

REMODELLINGBYCOMBINING

NUMBER, USED

Exchanging

Feed

Feed

Work
Work

Stop-motion

cam

Tension

tripping

"

cam

plate

clamp
clamp

Part

foot(TighC)
foot(left)

release

segment

regulating

link

1/2

WORM

Blank

part

available

"

Even

within

same

stitch

No.

tliere
are2kinds
of

worms

used:

partial

non-partial

worm

Number

changes

presence

partial

non-partial

worm

Remarks

or

with

of

or

Refertousage

of

blank

"

Refertostop­motion

regulating

cam

Ex.96--

stitches
48--

96

46

1--2ea.
2--1ea.

Feed

Feed

Work

Work

Stop-motion

cam

Tension

Feed

Feed

wheel

SAME

Exchanging

STITCH

cam

plate

clamp

clamp

cam

cam

Part

foot(right)

foot(left)

release

driving

driving

regulating

link

worm

worm

CHANGEOFNUMBER

Remarks

Blank

parts

available

" -

•1

Exclusive

available

depending

number

stitches

Exclusive

segment

available

depending

number
stitches

Exchange

depending

on

stitches

number"

"

cam

on

of

on

of

it

of

OF STITCHES

Refertousage

of

blank

"

Refertostop-

motion

regulating

cam

Refer

to

to

cam

wheel

"

tension

tripping

feed

worm

driving

release

segment

Refer

driving

feed

worm

and

cam

IREMODELLINGOFSUBCLASSESI

IN

Part

Needle

Shuttle

Needle

Needle

guide

CASE

name

hole

race

bar

bar

IN CASE SEWING

Condition:

from

standard

Remodelling

and

aft

sewing

sizetoover

6mm

Remodelling

and

aft

sewing

sizetoover

70inm

Remodelling

the

bigger

Remodelling

the

direction

the

direction

to

size

SIZEISCOMBINED

machine

fore

of

fore

of

make

-5+

Part

name

Work

clamp

mounting

for

large

Feed

plate

spring

Feed

across

connecting

rod(set)

Feed

across

driving

Feed

plate

spring

Work

clamp

foot

hook(right)

Work

clamp

foot

hook(left)

base

arm

size

foot

Part

No.

1)2S36L9SB00

D2S461.9SBOO

D2524L7VVOO

D2530L7W00

DS2545L4BB00

D2542L9SBOO

D2543284K00

CHANGINGOFSIZEOFNEEDLEISCOMBINED

Part

guide

thread

ring

No.

D2426282COO

B2426280000

B242628000B

E1817280000

B181728000B

B1401L7VV0O

B1405L7VVOO

Size

DP-17

Over

#11

#14,

#11

Over

of

needle

#18

#19

#18
#19

Over

#19

Remarks

Standard

Standard

Extreme

weight

Canton

of

over

sheets

heavy

material

material

10

thick

(4)

Relation

No.

of

between

stitches

the

stop-motion

Part

No.

stop-motion

regulating

of

cam

cam and number

(When

1/2

is

used)

worm

of

stitches

Part

motion

cam

No.

of

regulating

stop-

(5)

For

For

For

For

stitches

For

stitches

For

stitches

For

Relation

tension

No.

(1/2

28

stitches

36

stitches

42

stitches

56,64

72,84

96,108,116

128

stitches

release

of

stitches

worm

used)

between

D2612282A00

B2612280000

D2612L7VV00

feed

link

tripping

Part

cam

No.

driving

segment

of

worm

worm,

with

For

For

For

For

For

For

For

feed

Part

wheel

14

stitches

18

stitches

21

stitches

28,32

36,42

48,54,58

64

stitches

cam

the

number

No.

stitches

stitches

driving

of

worm

stitches

of

stitches

worm

D2612284D00

D2612L5RU00

wheel

Part

tensioi;

link

and

No.

tripping

segment

of

release

28

36

42

56

64

72

84

96

108

116'

128

(14)

D2205282AOO

D2204282AOO

D2304282A00

(18)

(21)
(28)

B2205280000 B2204280000

D2205L5RUOO

D2204L5RU00

B2304280000

(32)
(36)
(42)

D2205L7VV00

D2204L7VV00

'

(48)

'

(54)

(58)
(64)

-

55

-

(6)

i)

How

Part

In

to

numbers

case

use

the

the

blank

of

blank

stitching

feed

plate

work clamp

size

is

and

foot

within

blank

work^clamp

and blank feed

the

range

foot

plate

of

(vertical)60mm(2-3/18")

x

(crosswise)90mm(3-35/64"),

D-2551-L9SBV0

Large

clamp

right

Usage:

blank

foot

with

knurling

For

heavy

large'

work

tool

stitching

Large

clamp

knurling

weight

D-2552-L9SBV0

blank

foot

materials

-.size

use

tool

work

with

with

the

following

Large

left

clamp
right
Usage:For

blanks:

D-2551-L9SBW0

blank

foot

work

without

knurling

light

stitching

attached

clamp

foot

tool

weight

size

to

the

to

D-2552-L9SBW0

Large

clamp
left

material

to

be

backside

prevent

blank

foot

work

without

knurling

with

used

whencGnis

of

work

skip-stitching

tool

large

Large
joined,

Usage:

Large

work clamp

with

knurling

For

heavy

large

blank

stitching

feed

D-2551-L9SBX0

foot,

right

tool

weight

materials

size

D-2519-L9SBY0

plate

by

and

left

with

using

right

D-2551-L9SBY0

Large
joined,

Usage:

1.

work clamp

without

For

light

large

and

left

When

the

blanks

used,
parts

it

is

in

combination

D2S36L9SBA0...Work

D2560L9SBOO...Work

foot,

knurling

weight

stitching

joined

CAUTIONS

necessary

base

slide

on

D2S61L9SB00. . .Work-jclamp

slide

SS-1110640-TP.

2.

"Select

foot

mounting

center

at

nearly

clamp

the

of

foot.

the

the

" "

position

base

sewing

center

right

tool

materials

size

together.

ON

USAGE

this

to

:
clamp
for

clamp

plate

plate

of

set

screw

shape

of

and

by

using

page

use

foot

large

foot(right)

foot

Set

the

work clamp

can

the

blank

left

with

are

the

mounting

size

(left)

screw

so

that

be

right

to

be

following

(2)

the

placed

work

-

56

-

In

case

the

stitching size is

within

the

50inmCl-31/32"), use the following blanks :

range(vertical)18inmC45/64")x(crosswise)

B-2551-280-0V0

Blank

foot
knurling

Usage

work

clamp

with

right

tool

: For heavy weight

small

stitching

B-2551-280-0X0

Blank work clamp

tool

and

left

and

foot

right

B-2552-280-0V0

Blank

with

tool

work

left

materials

size

with

right

foot

joined

clamp

knurling

with

knurling

together

foot

B-2551-280-0W0

Blank

foot
knurling

Usage

work

without

tool

: For

used

backside

clamp

right

light

wheniis

prevent

B-2551-280-0Y0

Blank work clamp

tool

and

left

together

B-2552-280-0W0

Blank

foot

knurling

weight

attached

of

work

skip-stitching

foot

without

and

right

work

without

tool

materials

clamp

foot

foot

knurling

joined

clamp

to

left

to be

the

to

Usage: For heavy weight

Blank

right

feed

and

left

B-2519-280-0Y0

plate

materials

foot

joined

with
together

Usage:

CAUTIONS ON OPERATION

1.

2.

For

light

Use

attached

clamp

and

the

to

foot

left

foot

standard

(B-2536-280-0A0)

blanks

Select

foot

the

are

the

mounting

center

to

position

of

weight materials with

the

and

be

base

the

used

joined

feed

when

used.

set

sewing

backside

mounting

all

of

the

screw so

of

with

right

together

of

the

work clamp

shape

work

base

that

can

above

placed at nearly the center of the blank

work

3.

When

right
one

the

off

clamp

.foot

installing

other

and

using

don't

foot.

the

blank

joined

part

installing

use

with

together,

only and cut

part

or

this

part.

left

use

and

either

off

shave

cDa

be

it

-

57

-

ii)

Howtoprocess

By

referring

the

work clamp

to Table

1,

set

foot

the

work clamp

foot

mounting base to

the

either

screw

direction

Standard

mounting

Oscillating

foot

holes

of

mounting

of

A,B,C

the

sewing

work clamp

base

work

clamp

base

of

the

size.

foot

work clamp

TABLE

Fore

of

sewing

O-lBram

0-24mm

24-42nim

42-60mm

S)

@ ©C

and

foot

plate,

1

aft

direction

size

(23/32")

(61/64")

(61/64"-l-21/32")

(l-21/32"-2-3/8")

according

Set

foot
Fig.60)

to

the

position

mounting

B

A

B

C

fore

of

base(refer

and

work

aft

clamp

to

@

Attach

Process

@

surface

©

Drive

surface

@

To

it

surface.

@

Also,

is

clamp

preventing

all

the needle

of

the

the

machine

of

the

process the

liran

larger

as

shown

made

on

the

foot,

skip-stitching.

respective blanks.

by

shortening

work clamp

foot

in this condition

work

shape

than

in Fig.61,

lower

it

will

clamp

this

be

foot.

of the needle

needle

if

surface

very

effective

Fig.60

it

so

and

set

and

drop

drop

mark

a protrusion

of

the

work

in

that

it

it.

make

needle

part of the

and

makeafacing

will barely contact the

drop

marks

work

clamp

If, Work

r?

on

foot, process

of

30*^onthe

/

•0.4

Feed

the

clamp

T

plate

upper

upper

upper

foot

-

58

-

Fig.61

iii)

@

Processing

As

there

the

sewing

the

feed

plate

are2kindsofshapesofthe

specifications

and

Cloth

process

A

shape

feed

it.

plate,

Work

foot

selectitin

clamp

Cloth

accordance

B

shape

Work

with

clamp

foot

Shape

Note

Cloth

Special

of

feed

thickness

features

plate

Feed

The
of

the

larger

clamp

Heavy

\

7

plate

needle

feed

by

foot.

weight

1^

drop

plate

0.2mm

0.2

hole

should

than

material

mm

shape

the

be

work

A

f

Feed

plate

The groove shape

plate

than

the

The

clamp

small

Trimmed

No

should

the

work

outer

foot

as

Light

thread

bobbing

be

outer

clamp

shape

should

possible.

weight

of

.

mm

of

1mm

shape

foot.

of

be as

material

is

cloth.

feed
larger

of

the

short.

work

-

59

-

AO-10

(1) Cautions on assembling and disassembling

1)

UNIT

When

(ONE

the

PEDAL

machine

FOR

head

LK-280)

is to

be

installed

on

the table for

AO-10

unit,

do

not

use nut and washer of the

the bed base, as the lever

surface of the table, acts as a

the

top

of

the

table.

2)

When

lifting

it

installing the

stud to the hole at the

with

the

stop

ring.(Fig.61)

work

furthest

instaUing

substitute

clamp,foot

end

adjusting

rear

screw of the 3 screws

base

which

for the nut. So,

lifting

of the

Safety

chain, insert the

work

clamp

Work

clamp

Stop

plate-

Work clamp

is

attached to the

screw

foot

lifting

foot

lifting

ring

foot

lifting

for

work

lever

chain

installing

bottom

this

in

clamp

lever

and

from

foot

set

3)

When

hinge

installing

screws

and by screwing

The

hinge

lever,

so do

Starting

A , B to

screws

not

the

starting

starting

into

the

A

and

mix them

connecting

Fig.61

connecting

starting

lever's

connecting

bar,

hole

B are temporarily

up.(Fig,62)

bar

I

insert

and

bar

set

the connecting

pedal

lever's

and firmly

hole, respectively,

tighten

bar

the

to the respective holes of the

set

nut.

Fig.62

-

60

-

4) Be

left

sure

and

to

right

carefully

and

up

adjust

and

down

the

position

clearance

of

of

0.3mm(l/64")

the

safety

O.Sinin

of

adjusting
plateCFig.61).
direction

broken,

5)

Adjusting

Adjust

the

spring

grease

so

the

to

becomes

be

careful.

the

spring

spring

retainer

the

rim

If

the

larger,

switching

roller

area

clearance

the

switching

cam

base

of

the

•Spring

Spring

of

safety

cam

either

will

roller

switching

m

retainer

0.3nun
adjusting

up

move

base.

of

the

plate

and

down

smoothly.

(Fig.63)

cam

roller

horizontal

may

or

left

Also,

base

be

and

apply

right

sufficient

so

that

6) The

is

to

roller

be

7) As shown

stud
AO-10
the

direction.

part

is

LK-280 model and

used,

in

of

to

Work

base

so

Fig.64,

the

be

purchased,

clamp

set

hinge

be

very

work clamp

stop-motion

adjust

lifting

screw

careful

regulating

install

so

}

Fig.63

nut(NS-6110530-SP)

when

lifting

assembling

returning

lever

the

work clamp

that

the

starting

Starting

of

is

the

or

disassembling.

spring

AO-10.
lifting
lever

goes

lever

place

is

attached

So,

when

returning

up

toward

for

only

lock

to

spring

the

tight

the

the

to

arrow

Fig.64

8) AO-10

pedal

uses

plate

a

pedal

adjusting

plate

plate

for

lockstitching

by

sliding

-

61

but,

its

hole,

-

as

one

shown

by

in

one.

Fig.65,

Also,

set

the

the

pedal

plate

So,

stopper

adjust

by

screw

the

is

pedal

attached

plate

to

support

the

pedal

arm

set

plate

screw

and

so

pedal

that

plate

at

stop-motion

support

arm,

Pedal

bushing

(2)

1) The

position

(l/64--S/64").(Fig.66)

D

Order

AO-8

goes

Pedal

L-@—>

of

order

unit

up

at

the

clearance

stopper

Fig.65 Fig.66

operation

of

operation

and

operates

the

same

Pe^l

Cn=)

Pedal

screw

adjusting

of

the

time

of

of

in

with

the

pedal

plate

machine

the

machine and

the

order

the

plate

as

stop-motion

stopper

1.S-2mm

shown

the

pedal

in

of

screw

Pedal

is

Fig.67.

the

machine.

comes

to

1.5--2iTim

(Stop-motion)

Pedal

stopper

same as

screw

the

The work clamp

previous

foot

m

(3)

Adjustments

1) At

lever's

to

the

stop-motion

long

hole

l.S--2mm(l/16--S/64")

(Fig.69)

to

adjust

part

to

time,

this

the

and

as

When

the

machine

Fig.67

clearance

the

starting

shown

clearance.

-

in

62

stops

between

lever

Fig.68.

This

-

First

(Work

nut

comes

the

hinge

Turn

locks

step

clamp

the

of

pedal

foot

down)

stop-motion

screw

chain

up

should

at

each

Second

(Machine

regulating

be

adjusting

half

m

step

of

pedal

starts)

matched

nut

turn.

Stop-motion

0

regulating

1.5-2mm

II

lever

Starting

hinge

lever

screw

2)

When

the pedal

not

go

up,

turn

Also,

friction

be

3)

When

smooth.

the

when

of

work

the above causes,

cam

smoothly and

it

up

and

down.

4)

When

the machine

operation,

on

strongly,

up

without

the

starting

Fig.68

is

stepped

the

chain

the

work clamp

work clamp

clamp

if

if

not,

is

work

the

clamp

machine

the

on

adjusting

foot

one step

foot

lifting

lifting

up

nut(Fig.69)

lever

foot does not go up

the spring switching

then

started

will

machine,

foot

adjust

and

will

start.

if

the pedal

stop

pull

the

When
the

Chain

Fig.69

and

down

lever's

and

to

right.

movement

components so

at

the

stop-motion time,

roller

spring

is

moving

switching cam(Fig.63) by

is

returned in the midst of pedal

going up. But

the

work clamp

safety

plate

adjusting

the

work

is

that

bad,

the

nut-"'^

clamp

lessen

movement

verify,

the spring switching

if

the

pedal

foot

is

to

be

strongly

toward

foot does

the

will

besides

moving

is

stepped

raised

the

arrow

direction.(Fig.70)

Safety

adjusting

plate

I

Fig.70

-

63

Safety

-

plate

ENGINEERS

MANUAL

OF

AO-11

set

digest

Pedal

AO-11

sideways

(1)

Cautions

As a

the

connecting

To

connecting

bar

connecting

stud

is

a

unit

the

INSTRUCTION

basic

pedal

install

composed

on

the

table

on

assembling

step,

connecting

lever

bar

the

and

pedal

stud

of

and

BOOK

install

bar

the

connecting

retainer

components.(Fig.72)

bar

retainer

models

to

on AO-10

and

disassembling

the

in

place

pedal

so

LK-284-10, LK-282-20,

which

AO-10

AO-10

thoroughly,

unit

of

pedal

connecting

bar

stud

that

there

(Note)

This

unit

sideways

lever

bar

set

will

is a

Pedal

is

installed.

on

stud,

stud

retainer.(Fig.71)

screw,

be no

view

from

connecting

244mm

LK-284-40

the

table

install

install

friction

etc.

Please

and

by

the

pedal

the

pedal

of

pedal

the

backsideofthe

Pedal

connecting

lever

which

read

and

exchanging

connecting

/

are

table

bar

9

Pedal

Fig.71

connecting

Fig.72

bar

529mm

stud

retainer

-

64

-

BASK;_j^pjUSTMENTONTHE

CLUTCH

jUSJD

STOP-MOTION

Note:

1)

3/16"

(Note)

On

latch

The

same

the

following adjustments must be

sequence.

last

should

stitch

sit

before the

on

the

cam

machine

about

3/16"

Adjust

done

comes

(5

in

the

exactly

to stop, the rod

mm.)

below

the

hole

At

slow-speed

heavy weight

within

2)

At

and

the

a

slow-speed

the

Adjust by

regulating

rotation

materials,

range

cam

of

should

loosening

cam

(1400

the

150®.

position,

be

the

Roller

Roller

1/8"

roller

spm)

range

the

to

Adjust

shaft

or

with

5mm

clearance

5/32"

(3/16")

shaft

set

nut

(3

set

3-4mm

subclass

to

may

between

4 mm).

nut

of

Stop-motion

machine

be changed

the

rod

the

stop-motion

cam

for

latch

Stop-motion

regulating

cam

Stop-motion

link

rod

latch

3)

Abosolutely

do

not

move

the

brake

ring

stopper

where

the

Brake

ring

white

paint

stopper

is

applied.

Driving

O

O

©

HI

pulley

Stop-motion

(Note)

However/

adjusted

at

the

brake

the

with

stop-motion

low-speed

releasing

center

the

cam

Brake

in

the

center

Brake

case

speed

line

frame.

release

cork

the

decreasing

rotation

cam

of

the

of

the

ring

cam

exchanged

and

adjust

long

brake

time,

hole

/

Center

speed

device

remove

the

releasing

brake

of

line

Screw

Stop-motion

decreasing

which

the

ring

the

brake

cam

hole

are

hinge

screw

lever

device

not

painted

screw

stopper

releasing

hole

so

of

(set)

of

cam

or

white

the

that

matches

the

4)

The

clutch should

the

rod

latch

comes

be

engaged

off

the

for the

cam.

slow

The

brake cork

speed

just

ring

after

(the

middle

slow

Stop-motion

ring)

speed.

is

link

rod

Stop-motion

During

'pulley

stationary

latch

cam

this

is

running

Adjustment should be done as

whenever

interval,

follows:

idly.

^

When

the

machine

the

stop-motion

is

at

its

link

rod

latch

stop-motion

adjust

each

so

other.

5) Before

it

runs

driving

half

rotation

is

placed

cam, move

that

the

the

machine goes from

idly

pulley).

(the

(180

on

the

brake

brake

The

to

the

ring

proper

200

outer

brake

cork

degrees).

circumference

cork

and

the

ring

ring

the

cork

slow speed

rotates

length

of

fore

part

counter

idling

part

and

barely

to

the

is

of

the

aft

and

touch

high speed,

to

the

about

one

Adjustment

should

be

done

as

follows:

Rotate

right

rotated

plate

driving

In

case

idle

the

and with

condition,

adjusting

clutch

the

rotation

driving

number

will

pulley

driving

adjust

screw

begin

of

be

pressing

pulley

by

to

left

to

touch

stitches

increased

and

rotating

so

that

each

become

to

Brake

plate

the

brake cork

the

the

other.

over

270°

cork

adjusting

driving

driving

56,

range.

Driving

ring

1

ring

the

clutch

I

screw

pulley

pulley

range

Driving

\

in

Driving

pressing

fully

180°

pressing

and

the

(180°)

pulley

to

i^ly

of

pulley

plate

Roller

position

at

high-speed

Stop-motion

lever

Adjusting

screw

Driver

•''If

n-.

.•k'l

- •

'.

.A-

'

A'

»♦■