Brother EF4, MA4 Service Manual

•

SERVICE

MANUAL

FOR

V SERIES

OVERLO

EF4-V41 •
EF4-V71 •
EF4-V72 • V82 • MA4

CK

SEWING

V51
V81

• MA4-

• MA4-

MACHINE

V61
V91

-V

92

(

PRODUCT

(

SPECIFICATION

SPECIFICATION

LIST

CONTENTS

CODE SETTING STANDARD ) · · · · · · · · · · · · · · · · · · · · · · · · · · ·

) · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 4

( MECHANICAL DESCRIPTIONS )

III Needle

1Z1

Under

00

Over

1!1

Double

liD

Knife

[§]

Presser

[1] Feed mechanism

[I]

Upper

00

.

Lubrication

bar

mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

looper

looper

mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

feed mechanism

mechanism

mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

chain

stitch

looper

foot

mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

.... ~ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

..............................

mechanism (V61, V91, V92)

...............................................................

· · · · · · · · ·

( DISASSEMBLY ) · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·

··

· · · · · · · ·

··

· · · · · · · · ·

~

..............................

...................................

··

· · · · · · · · · · · · · · · · · · · ·

··

· · · · · · · · · · ·

··

· · · · · · · · 30

III Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

IZ1

00

Presser

Knife

foot

mechanism

mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

...............................................................

..

. 18

16

16

17

19

21

25

30

31

1!1

Under

liD

Over

[§]

Double

[1]

Needle

[I]

Feed mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

II]

Upper

looper

looper

feed mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

mechanism

mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34

chain

stitch

looper

bar

mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

.............................................................

mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

( ASSEMBLY ) · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·

III

Upper

IZ1

Feed mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45

00

Needle

1!1

Under

[§] Over

00

[1]

[I]

feed

mechanism

bar

mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

looper

looper
Double
Knife

mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Presser

mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52

chain stitch

foot

mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

...............................................................

looper

mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . .

..

. . . . . . . . . . . . . . . . . . . 54

33

41

41

SO

59

00

Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

61

( STANDARD

[I]

Adjusting

lZ1

Adjusting

rn1

Adjusting

1!1

Adjusting

[§]

Adjusting

[§]

Adjusting

11]

Adjusting

00

Adjusting

00

Adjusting

1m!

Adjusting

Ill]

Adjusting

H2l

Adjusting

111

Adjusting

Ml

Adjusting

1m

Adjusting

ADJUSTMENTS ) ·······

the

height

the

under

the

over

the

chain stitch looper, chain stitch needle guards

the

backward and

the

presser

the

height

the

height

the

positions

the

position

the

horizontal feeding

the

standard position

the

horizontal feed

the

standard

the

height

and location

looper,

looper

of
of

of

the

.............................................................

foot

............................................................

the

knife

the

feed

of

the

of

the

of

the

the

upper feed bar

movable needle guard, and needle guard

forward

dog

needle-thread take-up and

looper

timing

of

amount

vertical feeding

· · · · · · ·

of

the

needle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

movement

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

thread take-up

(position

the

horizontal feeding (level feed adjust arm) . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

··········································

of

of

..

..

.............................................

(F)

. . . . . . . . . . . . . .

(B)

and

(F)

. . . . . . . . . . . . . . . . . . . 66

the

chain stitch

the

.....................................

the

level feed eccentric wheel) . . . . . . . . 76

. . .

.. . ..

looper

needle thread

.. . ..

.. ..

..

.. .. . .. . ..

. . . . . . . . . . . . . . . .

guide . ..

..

. . . . . . 75

..

. . .

..

62

62

63
65

67
68
71
72

76

77
77
78
79

11§)

Adjusting

lll1

Adjusting

1m]

Adjusting

Iii

Adjusting

(

TROUBLESHOOTING

[1]

Needle

lZ1

Looper

rn1

Needle breakage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88

1!1

Improper

1m

Improper

[§] Puckering

11]

Slippage

00

Double scooping (overlocking) . :

the
the
the
the

thread

thread

thread
chaining-off

...........................................................................

cloth

clearance between
vertical feed
differential
clearance

ratio

between

the

upper feed

amount

of

the

upper feed

........................................................

the

cloth plate and

dog

and

the

dog

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

the

needle plate . . . . . . . . . . . . . . . . . . . . 83

lower

feed

dog

. . . . . . . . . . . . . 80

) · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 84

breakage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

breakage

tension

.......................................................................

..............................................................

..............................................................

................................................................

......................................................

81
82

85

88
88
89
90
90

(

NEEDLE

(

MATERIALTHICKNESSANDSTITCHWIDTH

TIMINGGAUGETABLE

(

SIZE

AND

UPPER

)

LOOPER

) · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·

·································

) · · · · · · · ·

··

· · · · · · · · · · · · · · · · · · · ·

···························

···

91

· · · · 92

93

PRODUCT

SPECIFICATION

CODE SETTING STANDARD

Model

[Model]

EF4-V41
EF4-V51
MA4-V61

* Refer

[Stit

ch

plate

(Max. sewing speed

(Ultra

high

speed single needle

(Ultra

high

speed

(Ultra

high

to

SPECIFICATION

width]

Specification

Stitch

width

Device

MADE IN JAPAN

7500-8500

twin

speed safety stitch sewing machine)

LIST

spm)

over

lock sewing machine)

needle overlock sewing machine)

for

details.

[Specification]

~-0

[ill-

[E)

@]-[ill

2 ......

3

4

......

Model

[Model]

EF4-

.

Stitch wid
Stitch

.

Stitch

plate

(Max. sewing speed

V71

EF4-V72 (High speed single needle adjustable

th 2 mm
width 3 mm
width

4 mm

~~ii;;;i~iiiiiiiiiiiiil

MADE IN JAPAN

6000-6500

--

spm)

.......

5

6

7

.......

Specification
Stitch

Device

.

.

width

top

Stitch widt

width

Stitch

width

Stitch

and

bottom

h 5 mm

6 mm
7 mm

feed overlock sewing machine)
EF4-V81
MA4-V91 MA4-V92

[Sewing

2

type]

......

EF4-V82 (Hi

Back feed

.

Front feed

gh

speed

(High

type

type

twin

speed

needle adjustable

top

and

bottom

top

and

bottom

feed safety stitch sewing machine)

- 1-

feed ove rlock sewing machin

e)

[Device]

Device

Model

V41

.

V51

V61

V71
V72

V81

V91

V82 V92

Automatic

Automatic

Semi-auto backtack device

Vertical chain

Horizontal chain

tape

tape

cutter

cutter

feeder

cutter

Stitch number control

Suction pipe, tension release, stitch number control

Suction pipe, stitch number

Horizontal

Vertical

For single needle
For

twin

needle
Pneumatic rear suction
Pneumatic
Vacuum type rear suction
Vacuum
Chain cutter only, rear suction

Chain
Pneumatic
Vacuum type
Chain cutter only

type

cutter

front

front

only,

with

with

suction

suction

front

cont~ol

NP

tension release

NP

tension release

suction

ATC1

0 0 0 0 0

ATC3

0 0 0

ATCS

0 0 0

TFH

0 0 0 0 0 0

TFV

0 0 0 0 0 0

SBL1
SBL2

CV1
CV3

CV4
CV6
CV7

CV9

CH1
CH2
CH3

-

0

-

-

0 -

0 0 0 0 0 0
0 0 0
0

0

0
0 0 0
0 0 0 0 0 0
0 0 0

0 0 0 0 0 0

0 0 0 0 0 0

0 0 0 0 0 0

0 0

0
0 0

- - -

-

-

-

-

0

0

- -

-

-

-

0

0

-

-

0

-

Tape

cutter

Automatic presser

* The

blower

motor

foot I ifter

for

the

Pneumatic knee switch
Solenoid knee switch
Solenoid hand switch

Pneumatic

chain cutter vacuum type

is

optional.

TC1

0 0 0 0

TC3

0

TCS

0 0

PL

1

0 0

0

0

0 0 0 0 0

0 0 0 0

0 0 0 0

-2-

[Stitch type]

Stitch

formation

One needle
Serging Plain stitching Blind-hemming Mock-safety

Stitch

Two needles

with

formation

with

(503)

two

threads One needle

(514)

four

threads Two needles

Safety stitching Safety stitching

with

with

(504)

three threads

One

needle

(515)

four threads Two needles

with

with

(505)

three threads Two needles

(516)

five threads

with

four threads

(512)

-3-

c

SPECIFICATION

A:

Sewing sleeves on

E:

Blind-hemming

LIST )

B:

Forming sleeves

F:

Serging

F

c

0

C:

Joining body parts

G:

Sewing frills on

0:

Joining

inner

leg

H: Joining shoulder

Subclass

01-3

-4

-5

-6

02-5

-6

-7

03-3

-4

-5

~

Stitch

type

needle=

a

(504)

a

(504)

8

(505)

Ultra

[]

~

No.

of

No.

of

Needle

hread5

1

3

1

3

1

3

high

speed

4;,

~.<

*

Stitch

width

~auge

mm)

(®)

3
4

-

5

6

5
6

-

7

3
4

-

5

single·needle

EF4-V41

==

:t

00

--

Max. Differential Height

stitch

length

(~)

0.9-3.8

0.6-2.6

0.9-3.8

ratio

0.7-2

1-3

0.7-2

presser feed dog

foot

(mm)

5

6

5

overlock

lr

~

of

Pitch

of

(mm)

1.6

2.5

1.6

[Main)

m

I

Dlfferen

Ia

I)

Type

of

feed

dog

H

Ill

n

Ill

n

II

sewing

+

Needle size

0007

#11

#14

#9

machine

l)j

Max.

Looper Usage (Material)

(spm)

8500

8000

8500

path

s

H

(-6)

H

s

s=

S:

Standard specification

H: High

lift

specification

m

Thin and medium

thick materials

A, B,C, D

Bulky knits

A,B,C

Blind-hemming

E

Attachment

-

(With

angle

knife)

Blind­hemming
ruler

04-3

-4

-5

~3)

(Using spreader)

05-4

-5

~3)

(Using spreader)

NOTE:

The

rotating

1 2

1

2

speed has been set according

3

0.9

·3.8

4

-

5

4

-

5

0.7-2

1.4·5.9

0.7-1.3

to

Brother's standard sewing specification.

5 1.6

5 1.6

-4-

m

II

'

k

#9

#14

8500

8500

Blind-hemming

s

Serging

s

Blind­hemming

E

F

ruler

Serging ruler

H

-~

F

r

t-C

c

Subclass

06--4

-5

07-2

-3

<,

Stitch type

ij

No.

of

t~eedle!

1

~

(504)

1

~

(504)

F

l]

lf

No.

of

Needle Stitch Max.

hreads

~auge

mm)

3

-

3

-

G

~

width

stitch

length

(®)

(~~)

4

1.4-5.9

5

2

0.9-3.8

3

==

00

Differential

ratio presser

0.7-1.3

0.7-2

r

0 F

~

--

~eight

of

Pitch

feedd99

foot

(mm)

5 1.6

5 1.6

ir

~

(mm)

of

[Main)

~

I

Differen1

ial)

Type

of

feed dog

p

k

~

I

+

Neediesize

DCx27

#14

#11

E

~

Max. Looper

path

s=

(spm)

8500

8500 s

s

m

Usage

(Material)

Serging

Serging ruler

F

Curlin~

(lower

curing)

-

Attachment

-

08-5

~

09-5

~

10-4

-5

~

-6

11-5

~·

-6

-7

12-3

~·

-4

-5

17-3

~·

-4

-5

(504)

(504)

(504)

(504)

(504)

(504)

1 3

1 3

1 3

1

1

1

Ruffling

s

A,G

Ruffling (with piping)

s

A,G

Taping

with

medium thick

s

H

s

materials

Taping

bulky knits

Backtacking
thin

and medium

thick materials

A,B,C,D

Soft chaining
thick

and

thick materials

thin and

H

with

H

medium

with

with

Ruffling
attachment

Parts

of
ruffling
attachment

Tape guide

Tape guide
(with angle
knife)

Backtacking
parts

-

0.8-3.2

5

-

0.8-2.8

5

1.6

[

#11

7500

m

0.8-3.2

5

-

0.8-2.8

5 1.6

[

#11

7500

m

4

0.9-3.8

5

-

6

5

3

-

3

-

0.6-2.6

6
7

3

0.9

4

5

·3.8

0.7-2

1-3

0.7-2

5 1.6

6 2.5

5 1.6

n

#11

~

H

#14

Ill

n

#11

8500

(-6)

8000 H

8500

D

3

3

-

0.9-3.8

4

5

0.7-2

5 1.6

n

#11

~

8500 s

-5-

G

F

<:,

Subclass

Stitch

22-4

-5

··,

-6

-~

.

--...

-7

23-4

-5

-6

a.

-7

(Mock-safety)

24-5

-6

•'

,·,"'-

-7

Ultra high speed

[]

~

type

No.

of

No.
hreads

reedle

4

2

:

{514)

2

4 2.2

(5

4)

,

~

(514)

4

2

'ff

of

Needle Stitch

~auge

mm)

2.2

3 6

~

~<

Max. Differential

width

stitch ratio

length

(®)

(~)

4

5

0.9·3.8

6
7

4

5

0.9

·3.8

6
7

5

0.9·3.8

7

twin

needle overlock sewing machine

EF4-V51

(Main}

==

00

~

--

!Height

presser

foot

(mm}

lr

!:::!::!:::!::>

Pitch

of

feedd~

(mm)

0

+

e

of

Oifferen

Needle size

Ia

I]

DCx27

of

Type

feed dog (spm)

H

0.7-2

5.5

1.6

#11

I

H

0.7-2

0.7-2

5.5

5.5

1.6

1.6

#11 7000 H

lit

n

#11

Ill

eD)

Max. Looper

path

sewlnJ'

spee

8000

8000

H:

High

E:

lift

Extra high

m

Usage

(Material)

Medium thick and

heavy materials

H

A,B,C,D

Medium thick and

heavy materials

A,B,C

Thin and medium

thick materials

H

A,B,C

specification

lift

specification

Attachment

-

-

-

25-5

-6

~

-7

(Mock-safety)

27-5

-6

-~

·:·--..

-7

28-5

-6

~

-7

31-6

-7

32-6

-7

{512)

(Mock-safety)

-~

{514)

~2)

(Mock-safety)

{512)

(514)

2

4

3

4

2

2

2

2

2.2

4

2.2

4

3

4

3

5

0.9·3.8

6
7

5

0.6·2.6

6
7

5

0.6·2.6

6
7

6

1.2·

7

5.0

0.7-2

1-3

1-3

0.7-1.4

1.6

5.5

2.5

5.5

5.5 2.5

6 2.5

n

#11 7000 H

Ill

n

#14

lh

H

#14

•

H

#18

7500 H

7000 H

6500

Thin and medium

thick materials

A,B,C

Bulky knits

A,B,C

Bulky knits

A,B,C

Extra heavy materials

E

A,B,C,D

(With

knife)

(With
knife)

(With
knife)

-

angle

angle

angle

•

6

1.2.

5.0

7

0.7-1.4

6

2.5

H

lh

#18

6500 E

-6-

Subclass

33-5

<f;,

Stitch
width

('(&')

5

~<

[]

(514)

j

No.

of

No.

of

hreads

t~eedle!

2 4 2.2

~

Needle

~auge

mm)

~

Stitch type

.·~

·

.........

==

00

MalC.

Differential Height

stitch ratio presser

length

(~)

0.8-3.2

0.8-2.8

~

--

foot

(mm)

5.5 1.6

of

Pitch

feed

lr

~

(mm)

(Main)

of

Differen1

dog ial)

Type

feed dog

I

m

~

I

of

+

Needle size

DClC27

#11

f)j

MalC.

Looper

sew~

spe
(spm)

7500 H

path

m

Usage

(Material) Attachment

Ruffling

Ruffling

A,G

attachment

34-5

2 4

2.2

~2)

(Mock-safety)

37-5

--~

·:·-.....

-6

38-5

~

41-5

.,~

-6

42-5

-6

~2)

(Mock-safety)

45-5

-6

,·,

-~

._

........

-7

(514)

(512)

(514)

(514)

2 4

2 4

2

2 4

2

2.2 5

2.2

4 2.2

2.2

4

2.2 6

0.8-3.2

5

0.8-2.8

5.5 1.6

[

#11

7500 H

m

0.8-3.2

0.8-2.8

5

1.6

[

#11

7500 H

m

5

0.8-3.2

0.9-3.8

0.8-2.8

0.7-2

6

5
6

5 1.6

5.5

1.6

[

#11

m

n

#11 8000 H

7500 H

Ill

5

0.9·3.8

6

5

0.6-2.6

7

0.7-2

1-3

5.5

5.5 1.6

1.6

H

Ill

H

HI

#11 7500

#14

8000

Ruffling

A,G

Ruffling

(with

A,G

Ruffling (with piping)

A,G

Taping

with

medium thick

materials

Taping

with

medium thick

H

H

materials

Taping

bulky knits

H

H

H

piping)

thin

thin

with

and

and

Ruffling
attachment

Ruffling

attachment,
piping parts

Ruffling
attachment,

piping parts

Tape guide

Tape guide

Tape guide

(with

angle

knife)

46-5

-6

-7

~2)

(Mock-safety)

49-5

~~~~.

-6

~

57-6

.~

-7

2 4

2 4

(514)

2 4

(514)

2.2

2.2

2.5

5

0.6-2.6

6
7

5

0.9-3.8

6

1-3

0.7-2

5.5 1.6

5.5 1.6

H

Ill

H

Ill

6

0.6-2.6

7

1-3

7

n

2.5

Ill

-7-

#14

#11

#14

7500 H

8000 H

6500 E

Taping

with

bulky knits

H

Backtacking
thin and medium

thick materials

Bulky knits

with

A,B,C,D

A,B,C

Tape guide

(with

angle

knife)

Backtacklng

parts

(With angle
knife)

c

F

G

Subclass

61-2

-3

-4

-5

62-2

-3

-4

-5

63-3

-4

-5

-6

-7

64-3

-4

-5

-6

-7

65-4

-5

-6

-7

66-4

-5

-6

-7

67-4

-5

68-4

-5

Ultra

<,

Stitch

type

~.

<'~

(516)

~

{515)

(Using spreader)

*r""··

·~·

-~

{516)

~~

(515)

(Using spreader)

·'-.·

..

>~

{516)

~~)

(Using spreader)

[l\

~

No.

of

No.

of

hread

~eedle!

2 5 2

2 4 2

2

5

2 4

2

5 5

2 4

2

5

Needle

<~6)

(Using spreader)

<~,6)

(Using spreader)

2 4 2

high

~

~

Stitch Max. Differential
width

(®)

2
3

4

5
2
3

4

5

3

4

5
6
7

3
4
5
6
7

4
5
6
7

4
5
6
7

4
5

4

5

stitch ratio

length

<mr>

0.9·3.8

0.9·3.8

0.9-3.8

0.9-3.8

0.9

0.9-3.8

0.8-3.2

0.8-3.2

lauge

mm)

3

3

5

2

speed

==

00

0.7-2

0.7-2

0.7-2

0.7-2

·3.8

0.7-2

0.7-2

0.8-2.8

0.8-2.8

safety

MA4-V61

~

--

[Height

of

presser

foot

(mm)

5

5

5 1.6

5

5 1.6

5 1.6

5 1.6

5 1.6

stitch

lr

~

Pitch

of

feedd!>Q

(mm)

1.6

1.6

1.6

sewing

[Main]

~

I

Differen

ial]

Type

feed dog (spm)

machine

+

Needle size Max.

DCx27

of

f)j

sew~

spe

~

#11 7500

~

IY

#11

7500 s

~

~

#14

7500

hi

~

#14

7500

ld

~

#16

7500

ld

~

#16

7500

ld

t

m

t

m

#14

#14

7000

7000

S:

Standard specification
H: High
E·

lift

Extra high

m

Looper

Usage

path

s

s

H(-6)

{-7)

s

H{-6)

{-7)

s

H{-7)

(-6)

s

H(-7)

(-6)

s

s

(Material)

Thin materials

A,B,C

materials

Thin

A,B,C

Thin and medium

thick materials

A,B,C,D

Thin and medium

thick materials

A,B,C,D

Medium thick and

heavy materials

A,B,C,D

Medium thick and

heavy materials

A,B,C,D

Ruffling

with

and medium thick

materials

A,G

Ruffling

with

and medium thick

materials

A,G

specification

lift

specification

Attachment

thin

Ruffling
attachment

thin

Ruffling
attachment

-

-

-

-

-

-

-8-

A

F

c

[Main)

Subclass

69-4

-5

70-4

-5

71-5

-6

72-5

-6

75-5

76-5

77-5

-6

78-5

-6

<::,

Stitch

type

<.

....

.

~

(516)

[]

ij

No.

of

No.

~eedle!

hreads

2

5

2

4

of

~5)

(Using spreader)

(516)

2

2 4

5 5

t..,.,.

/~

~5)

(Using spreader)

(516)

2 5

2

4

"-·

...

-~

~

~

Stitch

Needle

width

lauge

mm)

('®)

4

3

5

4

3

5

5

6

5

5

6

3

5

3

5

Max.

stitch

length

(~)

0.8-3.2

0.8-3.2

0.8-3.2

0.8-3.2

0.8-3.2

0.8-3.2

~5)

(Using spreader)

5

2

5

<~

(516)

2 4

5

5

~5)

(Using spreader)

0.9-3.8

6

5

0.8-3.2

6

=..,..

00

Differential Height

0.8-2.8

0.8-2.8

0.8-2.8

0.8-2.8

0.8-2.8

0.8-2.8

0.8-2.8

0.8-2.8

~

--

ratio presser

foot

(mm)

5 1.6

5 1.6

5

5

5 1.6

5

5

5 1.6

db

of

Pitch

of

feed dog ial)

(mm)

1.6

1.6

1.6

1.6

0

a

l)j

+

Differen1

Needle size Max.

DCx27

#14

#14

#14

#14

#14

#14

#14

#14

5~~~

7000

7000

7000

7000

7000

7000

7000

7000

Type

of

feed dog (spm)

t

m

t

m

t

m

t

m

t

m

t

m

t

m

t

m

Looper

Usage

path

Ruffling

and medium thick

s

Ruffling
and medium thick

s

medium thick and

s

H

(-6)

medium thick and

s

H

(-6)

Ruffling (and piping)

s

Ruffling (and piping)

s

Ruffling (and piping)

with

s

and heavy materials

H(-6)

Ruffling (and piping)

with

s

and heavy materials

H(-6)

m

(Material)

with

materials

A,G

with

materials

A,G

Ruffling

heavy materials

A,G

Ruffling

heavy materials

A,G

with

thin

medium thick

materials

A,G

with

thin and

medium thick

materiaio;.

A,G

medium thick

A,G

medium thick

A,G

with

with

and

thin

thin

Attachment

Ruffling
attachment

Ruffling
attachment

Ruffling
attachment

Ruffling
attachment

Ruffling
attachment,
piping parts

Ruffling
attachment,
piping parts

Ruffling
attachment,
piping parts

Ruffling
attachment.
piping parts

-9-

<::.,

Subcla$$

Stitch

type

81-4

<~

-5 5

82-4

-5

83-4

-5

-6

84-4

-5

-6 (515)

{516)

~

{515)

(Using spreader)

/~

t.._ • .,.._"·

{516)

~

(Using spreader)

ij

No.

of

reedles

2

2

2 5

2

l]

No.

of

hreads

5 3

4

4

lf

Needle

~auge

mm)

3

5

5

~

@..;

Max.

Stitch

stitch

width

length

('&)

~~

4

0.9-3.8

4

0.9-3.8

5

4

0.9-3.8

5
6

4

0.9-3.8

5
6

==

00

Differential

ratio

0.7-2

0.7-2

0.7-2

0.7-2

~

--

Pitch

of

Height

feed dog

presser

foot

(mm)

5

5

5

5

[Main)

lr

~

Differen

of

(mm) Type

ial)

feed dog

-~

1.6

hi

1.6

1.6

1.6

~

II

+

Needle size Max.

0Cx27

of

#14

~

#14

hi

~

#16

ld

ICB

#16

~

l)j

sewincr

spee
(spm)

7500 s

7500 s

7500

7500

.

Looper

path

H(-6)

H(-6)

m

Usage

(Material)

Taping

with

thin

with

with

with

H

thin

H

medium

H

medium

H

and

and

medium thick

materials

Taping

medium thick

materials

Taping

thick and heavy

materials

Taping

thick and heavy

materials

Attachment

Tape guide

Tape guide

Tape guide

Tape guide

85-3

l~,._

•

.,..

/~

-5

86-5

(516)

2

5 3

4

2

3

~5)

(Using spreader)

89-4

{~

....

<~

-5

90-4

-5

~5)

(Using spreader)

92-5

-6

<~

-7

93-5

-6

~

-7

(Using spreader)

(516)

{516)

{515)

2 5

2 4

2

2

3

3

5

5

4

5

3

1.2-5

5

0.7-1.4

3.5

2.5

~

#18

6500

~

1.2-5

5

0.7-1.4

3.5 2.5

~

#18

6500

~

4

0.9-3.8

5

0.7-2

5

1.6

lw

#14

6500

~

4

0.9-3.8

5

0.7-2

5 1.6

~

#14

6500

~

5

1.2-5

1.2-5

0.7-1.4

0.7-1.4

3.5

3.5 2.5

6
7

5
6
7

2.5

~

#18

~

~

#18

6500 E

6500 E

~

Extra heavy materials

E

A,B,C

Extra heavy materials

E

A,B,C,D

Binding

and medium thick

s

s

materials

C,H,J

Binding

and medium thick

materials

C,H,J

Extra heavy materials

A,B,C,D

Extra heavy materials

A,B,C,D

with

with

thin

thin

Tractor

foot

(with

angle

knife)

Tractor

foot

(with

angle

knife)

Binding
parts. tape
guide

Binding
parts. tape
guide

Tractor

foot

(with

angle

knife)

Tractor

foot

(with

angle

knife)

-10-

High

speed

adjustable

top

and

bottom

EF4-V71·V81, MA4-V91

feed

Overlock

sewing

machine

(Back

E:

Extra high

type)

lift

specification

<:::,

Subclass

71..01-3

81·22-4 4

91-63·3

91-65·3

Stitch

type

-4

~

·5

-6

·5

-6

-7

-4

·5

·6 6

-7

-4

-5

-6

-7

(504)

-~

:-

........

~.

(514)

1\.•q.

-~

{516)

r.

.•.

/~

{516)

l]

~

No.

of

No. of
hreads

~eedles

1

3

2

4 2.2

2

5

2

5

Stitch Stitch

Needle

*

width

~auge

mm)

-

3 5

5

~

length

('&)

(®)

3
4

0.9-3.8

5
6

5

0.9-3.8

6
7
3

4

0.9-3.8

7
3

4

0.9-3.8

5
6
7

t==

00

Lower feed
differential

ratio

0.7-2

0.7-2

0.7-2

0.7-2

~

~

~

--

Height

He~~ht

ofupJ:r

presser

eed

(mm)

(~~\

5.5

5 6

5.5

5

5 5

5 5

og

a

c;;;:v

Max.

uffe:I

amount

6

6

6

1§1 1§1

i i

Shape

[and

pitch

of

lower

feed dog

H

Ill

{1.6)

H

~

(1.6)

p

hi

(1.6)

p

hi

(1.6)

+

Needle

size

(0Cx27)

#11

#11

#14

#16

l)j

Max.

s;=

(spm)

6500

6500

6500

6500

Looper

path

H

H

H

H

m

Usage

(Material)

Thin and medium

thick materials

Thin and medium

thick materials

Thin and medium

thick materials

Medium thick and

heavy materials

Attachment

-

-

-

-

91-92-5

·6

t ...

/~

-7

2

(516)

5

0.9-3.8

5

6

5

7

0.7-2

3.5 6

6

p

#18

ld

{1.0)

5500 E

Extra heavy

materials

Tractor

(with
knife)

foot

angle

-11-

Subclass

72.01·3

-4

·5

·6

High

speed

.::::,

Stitch

type

a

(504)

~

No.

needles hreads

1

adjustable

(l\

of

No.

of

3

top

and

bottom

EF4-V72•V82,

<£;,

®.;

==

00

lf

Needle Stitch Stitch Lower feed

width

~auge

mm)

-

length differential

(roo')

(~)

3
4

0.9-3.8

5

6

ratio presser eed og

0.7-2

feed

overlock

MA4-V92

~

~

==:!:

Height Max.

He~~ht

of

ur3cer

(mm)

(~~\

5.5 4.6

sewing

8

!NV

ureper

eed

amount

machine

~~

iii

Shape
and pitch size
of

lower

feed dog

H

6 #11

~

(1.25)

(Front

em

+

Needle Max.

sew~

(DCx27)

spe

(spm)

6000

feed

H:

High

E:

Extra high

Looper

path

H

type)

lift

specification

lift

specification

m

Usage

(Material) Attachment

Thin and medium

thick materials

-

72.01-4

~4)

·5

(Using small·
%:)presser

72.02·5

·6

a

·1 7

72.08·5

a

{504)

72-09·5

~

82·22-4

·~

1~

'"'-~.

·6

·7

(504)

{504)

(514}

1

1

1 3

1

2

3

-

3

-

-

3

-

4 2.2

4

0.9·3.8

0.6·2.6

0.7-2

1-3

5

5
6

5.5

6.5

4.6

6.2

6 #11

~

(1.25)

n

8

#14

6000

5000 E Bulky knits

Thin and medium

H

thick materials

-

(With angle
knife)

lh

(1.25}

H

0.9·3.8

n

0.9-3.8

0.9-3.8

0.7-2

0.7-2

0.7-2

5.5 3.5

5.5 4.7

5.5 4.6

8

8

6

~

{1.25)

n

~

(1.25)

n ·5

I

(1.25)

#11 5000 E

#11 5000 E

#11

6000

H

Shirring

Shirring

with

piping

Thin and medium

thick materials

-

-

-

5

5

4
5
6
7

82-22·5

.•

~)

·6
(Using small·
%:resser

82·23-4

·5

·6

~

·7

(Mock-safety)

82·31·6

a

·7

(Using small·
%:\presser

{512}

{504)

2 4

2 4

2

5

2.2

2.2

4

3

0.9·3.8

0.9·3.8

0.9

·3.8

0.7-2

0.7-2

0.7-2

6

4

5
6
7

6 n

7

5.5 4.6

5.5 4.6

6.5

6.2

-12-

u-

6

I

(1.25)

n

6

~

{1.25)

6

lh

{2.5)

#11

#11

#18

6000 H

6000

5500 E

Thin and medium

thick materials

Thin and medium

H

thick materials

Extra heavy

materials

-

-

-

Subclass

High

speed

<:.,

Stitch

type

needles

adjustable

[]

~

No.

of

No.

of

hreads

top

and

~

~

Needle Stitch Stitch

width

('00')

length

(aD)

1auge

mm)

bottom

EF4-V72•V82,

Lower feed

~Jfferential

c=:.=

00

ratio

feed

overlock

MA4·V92

~

~

~

Height

He~~ht

presser

~~~

(mm)

~~~\

sewing

8

c:;;v

Max.

'feper

eecl

amount

§I §I

B

~

Shape

and pitch

of

lower

feed

dog

machine

I))

+

Needle

size

sew~

(0Cx27)

spe

(Front

Max.

(spm)

feed

type)

rn

Usage (Material)

ooper
path

Attachment

82·32·6

·1

~

(512)

(Mock-safety)

82·33·5

.~

·6

(514)

82·34·5

~

-6

82-37·5

·6

82·38·5

-6

(512)

(Mock-safety)

:~

(514)

~

(512)

2

2 4

2

2

2

4

3

2.2

4 2.2

4 2.2

4

2.2

6

0.9-3.8

7

5

0.9-3.8

6

5

0.9

6

5

0.9·3.8

6

5

0.9-3.8

6

·3.8

0.7-2

0.7-2

0.7-2

0.7-2

0.7-2

6.5

6.2

5.5 3.5

5.5 3.5

5.5 4.7

4.7

5.5

n

6

#18

5500 E

Extra heavy

materials

-

lh

(With

(2.5)

angle

knife)

H

8

#11

5000 E Shirring

-

I

(1.25)

9

8

#11

5000

E

Shirring

-

I

(1.25)

n

8

Ill

(1.6)

#11

5000 E Shirring

with

piping

-

n

8

#11

5000 E Shirring

with

piping

IIi

(1.6)

-

82-41-5

-6

-~

·:...-.,.

·1

82-42·5

·6

~

-7

82·51·5

·6

':·"'--.

~

·1

82·57·5

-6

·:~

·1

(514)

(512)

(514)

(514)

2

2

2

2

4

4 2.2

4

4

2.2

2.5 6

2.5 6

5

0.9

·3.8

6
7

5
6
7

5

7

5

7

0.9·3.8

0.7-3.2

0.7

·3.2

0.7-2

0.7-2

0.8-2.8

0.8-2.8

5.5 4.6

5.5 6

6.5 6.2

6.5 6.2

-13-

6

I

(1.6)

6 #11

I

(1.6)

m

8

1111

(1.25)

w

8

uu

(1.25)

#11

6000 H

6000 H

#14

5000 E Bulky knits

#14

5000 E Bulky knits

Taping

with

and medium

materials

Taping

with

and medium

materials

thin
thick

thin

thick

Tape

guide

Tape

guide

(Wlthangle
knife)

(With

angle

knife)

High

<,

speed

adjustable

[]

~

top

~

~

and

bottom

EF4-V72·V82, MA4-V92

==

00

feed

j:

overlock

~

__j_

8

[;WI

sewing

I§

ti

machine

~

i

+

(Front

()j

feed

type)

m

Subclass Stitch

92·63·3

-4

·5

·6

·7

92-63-4

·5

92·64·3

-4

·5

·6

·7 (Using spreader)

92-65·3

-4

·5

·6

·1

92-66-3

-4

·5

-6

-7

type

<.~

(516)

.-~

··~'<..

(516)

(Using small-

I

~~~~\presser

~

(515)

l,

...

,

-~

(516)

~

(515)

(Using spreader)

No.

of

No.

of

hreads

~eedle!

2

5 3

2

5 3

2

4 3

2

5

2

5 5

Needle Stitch Stitch Lower feed

~auge

mm)

5

length

width

(COO')

3
4
5
6
7 (1.25)

4

5

3
4

5

6

7

3
4
5
6
7

3
4

5
6
7

~ifferential

·3.8

·3.8

ratio

0.7-2

0.7-2

0.7-2

0.7-2

0.7-2

(®)

0.9-3.8

0.9

0.9

0.9·3.8

0.9-3.8

Height Max. Shape Needle Max.

Height

of

ofu'fo:

eeclog

presser

(mm)

c~\

4.6

5.5

4.6

5.5

4.6

5.5

4.6

5.5

4.6

5.5

and pitch size

uf:Jr

amount

6

of

lower

feed dog

f

(DCx27)

#14

Ill

6

#14

h~

(1.25)

6

#14

flu

(1.25)

6

f

(1.25)

6

#16

Ill

#16

fld

(1.25)

Usage (Material)

Looper

path

s;~

(spm)

6000 H Plain stitching

6000 E Plain stitching

6000 H Plain stitching

6000 H

6000

Plain stitching

H

Plain stitching

Attachment

-

-

-

-

-

92-69-4

·5

·6

92-70-4

·5

·6

92-71-5

·6

92-72-5

·6

2

2 4

2

2

5

5

4

·\·

....

-~

(516)

:}J

(515)

(Using spreader)

..........

--~

(516)

~

(515)

(Using spreader)

4

0.9.

3

5

3.8

0.7-2

5.5 3.5

8

f~u

6

4

3

5

5

0.9·3.8

5
6

5

0.9.

6

5

0.9-3.8

6

3.8

0.7-2

0.7-2

0.7-2

3.5

5.5

5.5 3.5

5.5 3.5

-14-

(1.25)

8

f~u

(1.25)

8

fid

(1.25)

8

fld

(1.25}

#14

#14

#14

#14

5000 E

5000 E

5000

5000

Shirring

Shirring

E

Shirring

E Shirring

-

-

-

-

Subclass

High

<,

Stitch

type

speed

adjustable

[}1

~

No.

of

No.
hreads

reedles

:rr

of

Needle
lauge

mm)

top

and

1f?

Stitch

Stitch

width

length

(®)

(®)

bottom

EF4-V72·V82, MA4·V92

Lower feed

~ifferential

~=

00

ratio

feed

overlock

~

~

===:!:

--

Height

Height

of

ofu':cer

presser

~eed

foot

(mm)

Cmml

og

8

wv

Max.

u~r

amount

sewing

(§

~

~I

Shape

and pitch

of

lower

feed dog

machine

()j

+

Needle

size

(DCx27)

s:=

(Front

Max.

(spm)

feed

Looper

path

type)

m

Usage

(Material)

Attachment

92-75-4

-5

'\·

...

-~

-6

92-76-4

-5

•~...

.....

-~

·6
(Using spreader)

92·77·5

''··~

-~

·6

92-78·5

~

-6

(Using spreader)

92-92-5

(:

·6

..

·~~

·1

..

~

{516)

(516)

(516)

(515)

(516)

2

2 4

2

2 4

2

5 3

3

5 5

5

5 5 6

4

E

E

E -

E

Shirring

(with piping)

Shirring

(with

piping)

Shirring

(with

piping)

Shirring

(with

piping)

Extra heavy

materials

-

-

-

-

Tractor
(with

knife)

foot

angle

0.9-3.8

·3.8

0.9

·3.8

0.9·3.8

0.9

·3.8

0.7-2

0.7-2

0.7-2

0.7-2

0.7-2

5.5

5.5

5.5

5.5

3.5

4.7

4.7

4.7

4.7

5.7

8

#14

5000 E

P~u

(1.25)

8

P~~

(1.25)

8

pld

(1.25)

8

pld

(1.25}

6

~~.~

(2.5)

#14

#14

#14

#21

5000

5000

5000

5500

5
6

4

0.9

5
6

5

6

5

6

5

7

92-93·5

-6

~

·1

(Using spreader)

2 4

(515)

5 6

5

0.9·3.8

0.7-2

7

3.5

-15-

5.7

6

~~

(2.5)

#21

5500 E

Extra heavy

materials

Tractor

(with

knife)

foot

angle

c MECHANICAL

[!]

Needle bar

mechanism

DESCRIPTIONS

)

(1) When

moves up and

(2)

The needle
the

needle shaft@).

(3)

The needle bar
and (D)

the

crank shaft 0 rotates

down

on

6,

driving

and

crank rod assembly @ moves

@)

attached

is

moved

the

eccentric

up

to

and

Eccentric

in

the

direction

part

of

the

needle bar clamp assembly e

down.

of

the

crank shaft.

the

the

arrow,

needle bar clamp assembly e up and

part

the

needle driving crank rod assembly @

is

guided by needle bar bushes (U)

down

via

<9

-16-

[2]

Under looper

mechanism

Eccentric

part

(1)

When

(2)
(3)

the

crank shaft 0 rotates in

mounted on
The

under looper shaft

The

motion

shaft e.

the

is

eccentric part

arm@)

transmitted

the

direction

of

the

crank shaft

oscillates.

to

the under looper holder 0 and

moves

-17-

of

the arrow, the under looper connecting rod @

up and down.

the

under looper

@}

via the under looper

~

Over looper mechanism

(

Eccentric

~

part

(1)

When the crank shaft 0 rotates in the direction

@ moves up and down on

(2)

The

over looper connecting rod assembly @ oscillates the over looper arm 0 via the shaft arm

the

over looper shaft

(3)

The motion
over looper@) follows

is

transmitted

0.

the

the

eccentric part

to

the over looper holder 6 via

ideal track.

of

of

the arrow, the over looper connecting rod assembly

the

crank shaft.

the

over looper guide holder

-18-

@,

@)

then

and

the

[!]

Double

[Longitudinal feed mechanism]

[Oscillating mechanism]

chain

stitch

looper

mechanism

(V61,

V91,

V92)

[Double chain stitch looper longitudinal feed mechanism]

{1)

When

longitudinal feed

{2)

The motion

longitudinal feed shaft@).

[Double chain stitch looper oscillating mechanism]

(1)

When the crank shaft 0 rotates in the direction

{2)

The

(3)

The chain stitch looper lever 0 moves the chain stitch looper holder @)and the chain stitch looper &
via

the

crank shaft 0 rotates in

arm@), and the slide block clamp 0

is

transmitted

motion

the

is

transmitted

longitudinal feed shaft@).

the

direction

to

the chain stitch looper holder

to

the chain stitch looper lever 0 via the chain stitch looper link@).

of

the arrow, the longitudinal feed rod @ moves the

is

moved up and down.

@)

of

the arrow, the under looper shaft arm@ oscillates.

-19-

and

the chain stitch looper & via

the

[51

Knife

mechanism

[Upper knife mechanism]

(1)

When

the

crank shaft 0 rotates in

moves up and

(2)

The upper knife differential

(3)

The upper knife differential arm

down

on

the

eccentric part

arm@)

the

direction

connected

@)

oscillates

of

the

of

the arrow,

crank shaft

to

the

upper knife driving rod assembly 8 oscillates.

the

attached upper knife holder 9 and

the

0.

@).

[Lower knife mechanism]

(4)

The

lower

knife

(9

is
the
The

spring

lower

attached

@).

knife holder guide@) positions

to

the

lower

the

knife holder

lower

knife

-20-

6,

and

is

<a,

and guides the lower knife holder

upper knife driving rod assembly @

the

upper knife

engaged

with

the

upper knife 0 via

6.

[§]

Presser

foot

mechanism (1) (V41, V51, V61)

(1) When

(2) The presser bar

(3) When

the

presser

@}is moved

moves

caught by
pressure

the

the

of

foot

downward

lifter

presser arm

presser bar
the

end

of

the

presser spring

lifter

via

the

arm

0,

fi

up

lifter

the

presser bar

lever 0

presser bar

attached

via

the

@)

is

lowered in

en>.

is

lowered

to

presser arm shaft e and

lifter

in

lifter

link@.

the

presser bar

the

@),

and

-21-

the

direction

lifter

direction

is

raised. The presser arm

of

the

the

of

lever

pin(!).

the

arrow,

@)

arrow,

the

presser bar

and

the

presser arm shaft

the

presser bar assembly

fi

is

released

lifter

from

lever

9,

@)

is

the

[I) Presser

foot

mechanism (2) (V71, 72, 81, 82, 91, 92)

Adjustable

(1)

(2)

top

When

the

feed bar
When

the

presser arm & starts

and

bottom

presser

lifter

upper feed dog

foot

m moves

to

feed overlock sewing machine

lifter

lever 0

the

upper feed support bar

@attached

rise.

is

lowered, the presser bar

4)

to

the

tip

of

lifter

lever

@)

rotates, and

up and down.

the upper feed support bar @

Smm

the

is

raised 5 mm,

upper

the

-22-

111

Feed

[Differential feed mechanism]

mechanism

(1)

Slide

block

* The

(1) The

(2)

differential

shaft

0.

differential

differential
The

differential

@),

and

ratio

To acquire a bigger

feed lever

link

lever e and

feed

the

differential

* For gathering feeding,

For stretched feeding,

is

adjusted by changing

differential

@)

moves

the

differential

amount

the

the

is

transmitted

feed dog

differential

differential

@)

operates.

feed lever@)

feed lever

JGathering

the

height

ratio, change

the

slide block on

feed adjust

to

the

@)

feeding

of

the

slide block against

the

height

the

link@.

differential feed bar

is

set

to

is

set

to

of

the

differential feed arm @ vertically via

lower

position.

upper position.

that

main feed shaft

fi

via

the

differential feed

of

0.

the

main feed

the

link

-23-

111

Feed

mechanism

(2)

[Stitch length changing mechanism]

(1) When

with

a finger and

0 enters

(2)

The stitch length

part®

It

is

convenient

*

After

changing

the

feed adjust shaft 0

the

pulley @

part®

of

the

of

the

can

eccentric

to

align

the

stitch length,

be adjusted by turning

is

pressed

is

turned in

eccentric cam.

cam

with

the

the

graduations on

it

can

Reference

around the eccentric

the

direction

the

pulley

feed adjust shaft 0

the

pulley@

be fixed using

the

mark

cam

of

the eccentric wheel assembly

of

the

arrow,

while

the

pressed.

with

the reference mark on the

screw.

tip

of

the

the

tip

of

the

feed adjust shaft

feed adjust shaft 0 enters

belt

cover@).

-24-

1!1

Upper feed

[Horizontal feed mechanism]

mechanism

(1)

(1)

When

the

crank shaft 0 rotates in

the

eccentric wheel

(2)

The

motion
feed shaft
and

the

(3)

The level feed crank shaft
is

moved horizontally.

is

0.

feed

transmitted

arm@

@.

to

The horizontal feed

oscillates.

@)

the

direction

the

level feed adjust arm block assembly

amount

transmits

the

of

the

is

transmitted

motion

to

-25-

arrow, the feed rod

to

the upper feed bar

the

@)

moves back and

(9

via the feed arm e and

feed arm @ via

G!>,

and

the

feed rock I

the

upper feed bar

forth

ink

on

the

fj,

G!>

[I]

Upper feed mechanism (2)

[Horizontal feed adjusting mechanism]

the

When
plate

0 and

feed rock

position

link@.

of

the

slide block 0

the

level feed adjust lever shaft

Then,

the

horizontal feed amount

is

changed using

@,the

-26-

the

level feed adjust lever

rocking amount

of

the

upper feed dog

of

the

feed arm 6

is

changed.

@)

via

is

the

feed adjust

changed via

the

00

Upper feed mechanism {3)

[Vertical feed mechanism]

(1)

When
and down.

(2)

The

differential

<9

(3)

The
feed

the

crank shaft 0 rotates in

motion

osci

vertical feed crank shaft G transmits the motion

bar@)

II

ates.

is

transmitted

arm@) I

is

the

moved up and down.

to

vertical feed amount

the

direction

the vertical feed adjust arm block assembly 0 via the upper knife

of

is

transmitted

Eccentric

the arrow, the upper knife driving rod @ moves up

to

the feed

to

the upper feed bar assembly @),and

part

lifting

link@) I and

the

the

feed arm

upper

-27-

[I]

Upper feed

[Vertical feed adjusting mechanism]

mechanism

{4)

the

(UL)

position

0,

When
shaft
horizontal feed

of

the

rocking

amount

the

slide block 0

amount

of

the

is

changed using

of

the

feed arm (§}is changed via

upper feed dog

is

changed.

the

vertical feed adjust lever @ via adjust lever

the

feed

lifting

link

0.

Then,

the

-28-

[II

Lubrication

-29-

c

DISASSEMBLY)

[II Covers

NOTE:

Drain

the

oil

from

the

pump by

turning

the

pulley a

I

®

I

few

times before

remo-ooing

--~

the

cover.

(

1)

Remove

(2)

Remove

(3)

Remove

(4)

Loosen

(5)

Remove

(6)

Loosen

(7)

Remove

(8)

Remove

(9)

Remove

(1

0)

Remove
(11) Remove
(12)

Remove
(13) Remove
(14) Remove

the

three screws and

the

four

bolts and

the

four

screws and

the

two

screws, and remove

the

presser arm assembly 0 from

the

set screw, and remove

the

two

screws, and

the

two

screws and

the

six screws,

the

two

screws, and

the

four

screws, and

the

two

screws, and

the

three

screws, and

the

six screws,

the

the

the

the

the

the

feed bar cover@), and

the

the

the

the

the

cover

belt

cover

0.

oi I reservoir@.

top

cover@).

the

face plate cover e by sliding

the

needle plate.

the

cloth plate along

cloth guide

cloth guide set plate@).

eccentric wheel cover

frame side cover G).

front

front

for

feed mechanism

cover

cover

6.

the

(L)

guide~.

(L)

assembly@) by sliding

-30-

with

the

packing.

4Il>.

(B)

4D,

and

cloth plate (lower)@).

the

it

to

the

it

to

the

packing.

front.

front.

~

Presser

foot

mechanism

(V61

(V711

I

V91

V721

I V92)

V81

V821 V91

1

1

V92)

(

1)

(2)

Loosen

Remove

the

screw, and remove

the

screw, and

the

the

upper feed dog

presser

foot

0.

@.

(This

step

is

for

overlock sewing machine.)

(3)

Loosen

(4)

Remove
remove the presser bar

(5)

Remove

(6)

Remove

the

bolt

for

the

presser bar I

the stud screw, and

lifter

the

two

screws, and

the

screws, the thread guide pipe G, and the looper thread guide

ifter

arm

the

presser bar

lever@).

the

lever adjust plate@.

@),

and remove the

lifter

link from the

sewing machine only).

-31-

only adjustable

presser

arm shaft·

presser

foot

top

and bottom feed

0.

lifter

lever

€l

(for

the safety stitch

@).

Then,

~

Knife

mechanism

(1)
(2)
(3)
(4)

Remove
Remove
Remove
Loosen

the

screw and

the

screw,

the

bolt, the lower

the

screw, and remove

the

the

upper knife

upper knife holder@, and the nut.

knife@

the

0.

I and the

lower knife holder (D and

lower

-32-

knife

presser

the

e.

spring

@).

III Under looper

mechanism

(1)

Loosen
(2) Remove
(3)

Remove
(4) Remove
(5)

Loosen

from

the

(6)

Remove

the

set screws

the

two

the

screw, under looper thread guide

the

screw and looper thread take-up

the

screw

under looper shaft & .

the

movable needle guard from

of

the

screws and

of

the

movable needle guard, and

needle clamp

the

needle plate@).

0,

and remove

(L)

e I and

(L)

<9.

the

under looper holder@).

the

the

the

bolt, and remove

needles@.

under looper

0.

the

under looper holder

@)

-33-

~

Over

looper

mechanism

(1)

Remove

(2)

Loosen
looper

(3)

Remove

(4)

Loosen
(5)
(6)

Remove
NOTE:

Loosen

the

three screws and the thread guide bracket

the

screw, and remove over looper thread take-up

thread take-up

the

five screws,

the

screw, and remove

the

bolt

for

the

two

The guide bush positioning plate

unless

it

is

necessary.

(R) 0 will

the

the

over looper arm

screws,

the

come off.)

inside cover@), and

the

over looper@) from

over looper mechanism assembly

{I)

0.

(R)

@)

from

the

looper thread guide

the

over looper holder & .

@).

4Ii>

from

has

already been adjusted before shipping.

-34-

the

over looper shaft @. (Under

(9.

the

over looper shaft@.

Do

not

remove

it

(§]

Double

chain

stitch

looper

mechanism

(V61,

V91,

V92)

(1)
(2)
(3)
(4)

(5)
(6)
(7)

Remove
Remove
Remove
Remove

(F)@).

Loosen
Remove
Loosen

the

bolt,

the

main feed dog

the

screw,

the

screw and

the

screw, chain stitch needle guard

the

bolt, and remove the chain stitch looper holder 0 from the longitudinal feed shaft@).

the

stud screw and the thread handler

the

two

set

the

chain stitch looper@ from the chain stitch looper holder

the

felt

screws,

and remove the thread take-up assembly

0,

and the differential feed

support assembly@.

(B)

@,needle guard

bracket~.

-35-

dog@.

(F)

6,

tD.

e.

and chain stitch needle guard

11]

Needle

bar

mechanism

(1)

Remove

(2)

Loosen

(3)

Remove

(4)

Remove
lifting

(5) Loosen

needle bar clamp assembly

the

needle

the

set screw, and remove

the

screw 0

the

oil cap

it

from above.

the

bolts

bar@

<9,

for

by

turning

the

of

needle bar bush (U)

and loosen

the

needle balance

4D

along

the

needle clamp 0 in the direction

needle thread holder@) from the needle

9.

the

screw

of

@)

and

with

the needle shaft

the needle bar clamp

the

needle driving crank rod assembly

4D).

fj.

of

the arrow.

bar@.

Remove

the

needle bar @ by

@).

Remove

the

-36-

[II

Feed

mechanism

I

)

®'

~

(1)

Loosen

(2)

Remove

(3)

Tilt

of

(4)

Return
machine head, and

(5)

Remove

only).

(6)

Loosen

(7)

Tilt
shafteD.

*

the

set screw

the

two

the

machine head until

the

set collar@.

the

machine head

the

two

the

bolts

the

machine head until

After

the

feed shaft

0,

and remove the set screw knob@.

bolts, and

Remove

the

oil

screws

for

and the longitudinal feed arm stopper@) (for the safety stitch sewing machine

the

feed arm assembly

CD

the

differential stitch control plate@).

it

stops.

the differential feed adjust lever(!).

to

cap@}

it

is

removed, return the machine head

Loosen

its original position.

on the machine side.

stops.

4!0,

Loosen

the

the

-37-

bolt

the

set

of

the differential link lever

Remove

differential feed arm

screw

of

the oil

the set collar

to

cap

& on the rear side

4D,

and

its original position.

e,

and

the

main feed arm

@,

and

the

set

screws

of

the

4).

remove the feed

[I] Upper feed mechanism (1)

[Horizontal feed]

~

-~

"'

---"', .

Jf!f:::r~d~r

Stud screw J assembly

(

1)

Remove

(2)

Loosen

(3)

Remove

(4)

Remove the

(5)

Loosen

(6)

Remove

(7)

Loosen

the

Remove

the

the

set screw

the

the

set screw, and remove upper feed bar guide

the

the

feed arm

the

spring

two
two

stud screw

set screws

level

0.

screws and
screws and

@).

fee~

knob@,

the
the

of

the

for

the

crank shaft

and remove the set

level feed length control plate@).

feed adjust plate e from

level feed crank shaft@). (The upper feed bar assembly

two

set collars attached

@).

screw@)

(L)

to

from

the

feed adjust plate

the

level feed adjust lever shaft@).

6.

the

level feed crank shaft @),and

e.

will

come

the

off.)

bolt

of

-38-

[j] Upper feed mechanism (2)

[Vertical feed]

(

1)

Loosen

(2)

Remove

(3)

Loosen

vertical feed adjust lever(!). Remove adjust lever shaft

(4)

Loosen

(5)

Remove

{6)

Loosen

the

set screw

the

two

the

set screw

the

adjust screw

the

screw and silicone

the

set screw, and remove upper feed bar guide

0,

and remove

screws and

for

the

6,

the

set screw

the

vertical feed length control plate@.

set collar 0 attached

and remove

tank

it

along

assembly

with

(U)

knob@.

to

(U

the

~.

Setscrew

adjust lever shaft

L)

0.

spring.

(R)@).

(U

L)

0,

and the

bolt

of

the

-39-

[I)

Upper

[Vertical feed]

feed

mechanism

(3)

(7) Loosen

vertical feed crank shaft
(8) Remove

the
(9)

Remove

the

set screws

the

upper feed bar assembly

upper feed bar assembly.)

the

vertical feed crank shaft

of

the

0.

set coli

ars

@from

0.

4n>,

and

o

____

Set

collars

0

the

bolt

of

the

feed arm

the

presser arm shaft bush

____

_

4D.

Remove

tD.

(The

o

0

the

wick

screw

is

attached

of

the

to

-40-

(ASSEMBLY)

1I1

Upper feed mechanism (1)

[Vertical feed]

0-----...

6 m m ---+--+--•

0

____

o

0

(1)

(2)
(3)

Pass

the

the

set collar @

surface.)
Attach
Secure

the

the

vertical feed crank shaft 0 through

so

that

the

end

of

the

vertical feed crank shaft 0 protrudes 6 mm from

upper feed bar assembly 0 along

vertical feed crank shaft 0 using

Set

collars

the

frame. (Position

with

the

wick

the

screw.

the

vertical feed crank shaft 0 using

to

the presser arm shaft bush

9.

the

frame

-41-

[i] Upper feed

[Vertical feed]

mechanism

(2)

r

(4)

Pass

adjust lever shaft

bolt

of

{5) Secure

(6) Attach
(7) Insert

the

vertical feed adjust lever@).

the

vertical feed length control plate@) using

the

set screw knob

the

spring

4»

(U

into

L)

(i)

Q)

to

the

frame, and

through

adjust lever shaft

the

frame, and

tighten

tighten

the

(UL)

(i) using

the

adjust screw@.

-42-

the

screw.

the

set screw

set screw

of

the

set collar & and

4ID.

the

[!]

Upper feed

[Horizontal feed]

mechanism

(3)

0

(1)

Insert

the

level feed crank shaft 0

collar @

tighten
(2) Insert
(3)

Secure upper feed bar guide

backward

feed bar assembly

so

that

the

the

set screw and

the

upper feed bar assembly 0

or

forward, and position upper feed bar guide

end

e.)

into

the

frame. (Position the level feed crank shaft 0 using

of

the

level feed crank shaft 0 protrudes

the

bolt

of

the feed arm 8

into

(R)

0 using

the

the

.)

level feed crank shaft

set screw. (Move

Silicone tank

(R)

assembly

7.5

0,

the

0

so

(U)

mm

from

the

frame edge. Then

and

tighten

upper feed bar assembly 0

that

it

does

the

stud screw.

not

touch

the

the

set

upper

{4)

Attach silicone

{5)

Attach upper feed bar guide

{6)
{7)

Attach

Attach

the
the

tank

assembly

{L) ~ using
feed adjust plate@)
upper feed dog@)

{U)

to

to

using

the

screw.

the

set screw.

the

level feed adjust lever shaft & using

the

upper feed bar assembly e using

-43-

the

the

screw.

screw.

[!]

Upper feed mechanism (4)

[Horizontal feed]

(8)

Attach

(9}

Attach

(10) Attach

the

level feed length control plate

the

set screw knob 4i

the

spring@.

to

the

CD>

using

the

screw.

feed adjust plate@) using

the

set screw

tD.

-44-

~

Feed mechanism (1)

©

{1)

Tilt

the

machine head until

the

differential feed arm
stitch sewing machine,
(Insert

block,

. (2) Position

inside face

the

and place them on

the

shaft

of

the

feed shaft 0 using

of

the

bush.)

it

stops.

8,

the

the

longitudinal feed arm(§) should

differential feed

the

differential feed arm 8

Pass

the feed shaft 0 through

main feed arm

link 6 into

the

set collar @

e,

-45-

so

and

the

set collar 0 in

be·

the

differential feed adjust

.)

that

the

the

bush,

also inserted.)

end

of

the feed shaft 0

the

feed arm assembly@,

that

order. (For

link

@)

is

the

and

flush

safety

the

with

slide

the

~

Feed

mechanism

(2)

(3)

Set

the

stitch length
reference mark
retracted.
NOTE:

(4)

Pass

$,and

set screw

(S)

Attach the longitudinal feed arm stopper@ using the

(6)

Attach

(7)

Attach the set screw knob

When tightening
on both

the

differential feed adjust lever @)through the

remove any

of

the

the

differential stitch control plate

to

the maximum. Tighten the bolt

of

the feed shaft 0

the

bolt

sides.

looseness

set

collar®.

trP

on the

(Hang

to

is

of

the feed arm @,make

left

and right

the

spring ~ .)

the differential feed adjust lever@) using the set screw@.

on the

6)

top

of

using the bolt.

I

)

~

~

of

the feed arm assembly @

when the feed arm

sure

that

bush,

set collar

the differential feed adjust lever, and tighten the

screw.

(Only

for

no

looseness

®,and

V61,

assembly

of

the differential link lever

V91,

V92.)

so

that

the

@

is

extremely

the feed arm @

·

is

-46-

~

Feed

mechanism

(3)

Slide block

Approx.6mm

Main feed bar

Differential feed bar

(Lower

the

(Raise

the

differential link lever.)

differential link lever.)

•

~

[Adjusting
{1)

(2)

(3)
[Adjusting the feed

* Before this adjustment, set

(1) Temporarily tighten

(2)

the

standard feeding position

Set

the

stitch length
extreme back.
Temporarily

Loosen

that

it

tighten

the

set screw knob

stops by moving

of

the main feed bar and

positioned 6 mm above
aligned
Align

the

lever @ up

the

with

the

maximum setting.

the

differential feed adjust lever @)to the upper third reference line (for plain stitching). Adjust

timing

between
or

down

farthest forward position.

To

the

farthest forward position

of

the differential feed arm]

to

the

maximum, and

the

bolts

for

the

differential link lever

@.

Adjust the back and forth inclination

the

differential feed adjust lever@).

the

movement

the

differential link lever

the

differential feed arm

the

main feed bar and

so

that

the

main feed bar

turn

the

differential feed bar]

of

the main feed dog

-........

the pulley

to

C@

Then

C@

until

the

slide block

@)

when the differential feed adjust lever

the

differential feed bar by moving

is

even

with

the differential feed bar when they move

-47-

To

the

farthest

set

the differential feed arm

and

the differential feed arm@).

forward

of

the differential feed arm

position

tighten the bolts again.

to

3.8 mm.
of

the differential feed arm

the

@)

to

differential

the

@)so

@)

is

@)

is

link

to

~

Needle

bar

mechanism

(1)

Screw~

Frame

top

(1)

Insert

the

needle shaft 0

balance
ofthethrust.

(2)

Insert
and

(3)

Attach

(4) Turn

the
the

NOTE:

(5)

Tighten

bar

{6)

Temporarily attach the main feed dog

@)

and the needle driving crank rod assembly e

the

needle bar 0

the

needle bar clamp & , and attach

the

screw

of

the

pulley

to

set

needle driving crank rod e

bush.

Make sure

the

is

at

its lowest position.

bolt

that

of

with

into

needle bar

the

needle driving crank rod 0

the

the needle balance

the needle bar clamp assembly @ into the

so

that

·

needle bar

bush

so

pulley turns easily.

bush

(U)

~-

Pass

the

needle clamp@).

(U)

~.

that

the needle bar clamp &

@)

so

that

it

aligns

4ID,

the differential feed dog

them through the needle thread holder @

to

its highest position, then tighten

with

the

bush,

and attach

there

is

no

looseness

is

positioned 3

top

of

tD,

and the needle plate C).

mm

the frame when

in

the

under

the

needle

direction

the

bolt

the

end

the

needle

of
of

-48-

~

Needle

bar

mechanism

(2)

(7) Loosen

into

the

screw

the

needle hole on

of

the

needle bar clamp assembly

the

* For a single-needle machine,

*

For

a twin-needle

H

(8)

Turn

the

clearance between

pulley

or

safety stitch sewing machine,

H

to

move

the

needle

needle plate.

turn

the

the

needle bar 0

tip

needle

and

the

6.

Turn

bar@)

H

to

face surface A

turn

the

needle

Dimension H

V411

V611

V71

V721 V911 V92

VS1 I V81

to

its highest position. Refer

I V82

needle plate top, and

the

pulley slowly

of

the

screw

bar@)

to

find

S {Standard) H (High

10±0.2

mm

10.9±0.2

11.4±0.2

~

to

the

fix

it.

to

insert

the

needle

toward

n·eedle

the

front.

locati~n.

lift)

E (Extra

mm

12±0.2

mm

12±0.2

above table, adjust

high

mm

mm

tip

lift)

the

(9)

Remove

the

needle@,

the

needle plate

4D,

the

main feed dog Q), and

-49-

the

differential feed dog

CD.

[II

Under

looper

mechanism (1)

(1)

Attach the under looper @

(L)

thread guide

using the
looper holder
using the bolt.

NOTE:

The
so

under looper holder

@)

screw.

Temporarily attach

0

under looper @ should be attached

that its bottom sticks

and

under looper

to

the under looper holder 0

the

to

the under looper shaft e

to

the pin

0.

under

of

the

0-0.0Smm

overlap

------'

[Adjusting the farthest
looper]

<D

Turn the pulley

to

way

®

Loosen

0

the center

point.

®

Raise
the under looper
looper
when the under looper @ point aligns
center

the left.

the bolt. Move the under looper holder

so

that

there

of

the needle

the needle from its lowest position. Adjust

@ point overlaps the needle

of

the needle.

left

position

to

move the under looper all the

is a 3.8

holder 0

mm

and

of

the

under

clearance between

the under looper

so

that

the under

0-

0.05

mm

with

the

-50-

[!]

Under looper

mechanism

0-0.05

mm

{2)

[Adjusting the movable needle guard]

<D

Attach the movable needle guard

looper holder

®

Raise

the needle from its lowest position

the under looper

needle.

® Loosen

movable needle guard

there

is

needle and the under looper

0 using the bolt.

@point

the

bolt. Adjust

a 0 - 0.05

with

the

@)

by moving

mm

clearance between

@.

@)

to

the

center

position

the under

to

align

of

the

of

the

it

so

that

the

[Adjusting needle guard

<D

Attach needle guard
support bracket using the screw

®

Raise

the needle from its lowest position

the under looper

needle. Adjust the position

so

that

the

clear.ance
and the needle
with

a thread number over and including
(thin thread); approx.
(thick thread).

(F)]

@point

is

0.05-

(F)

(§)

to

the needle plate

f).

to

with

the center

of

needle guard

between needle guard

0.2

mm

for

using threads

0.3

mm

using #30 thread

align

of

the

(F)

(F)

#50

(§)
(§)

-51-

~

Over looper

mechanism

_..,....~-A

(1)

~

A

S (Standard)

1.6±0.2 0

Touch

H (High

the

lift)

right

side.

E (Extra high

1 ±0.2

lift)

(1) Insert

screw

@).

NOTE:

(2)

Attach
Adjust
(S

(standard) = 1.6 ± 0.2, H (high

the

over looper mechanism assembly 0

so

that

the

over looper guide holder touches the

Make sure
assembly.

the

over looper e

the

clearance between the over looper 0 and the over looper holder@

that

the

over looper holder

to

the

over looper holder@ using

lift) = 0,

into

the over looper

@)

E (extra high

(3) ~ Turn

under
without
position
tighten the screw.

shaft@,

right

side

of

moves smoothly in the over looper mechanism

the

screw.

lift)

= 1 ±

0.2)

the

pulley slowly

the

projection

contacting each other, and adjust

of

the under looper

the

and secure them using the

guide

bush

positioning plate

as

follows;

to

pass

the

over looper 0

of

the

under

@),

looper

and temporarily

@)

the

-52-

[§]

Over

looper

mechanism

(2)

12mm

(4)

Attach

Attach looper thread take-up

looper thread take-up
(The looper thread guide@) should be positioned
Turn
the

the

inside cover & and

the

pulley

over looper e

so

the

looper thread guide@)

(L)

@)

so

that

(L)@)

is

12 mm when

that

over looper thread take-up

is

at

its lowest position. Then

to

the

the

distance from the center

the

under looper 8

39

mm above

(R)

0)

is

positioned 9.5 mm above the frame when

tighten

the

screw

e.

Attach
screws.

the

thread guide bracket

4)

to

the over looper mechanism assembly 0 and

-53-

frame using

of

is

positioned all

the

top

of

of

over looper thread take-up

the

screws.

the

screw

the

way

the frame.)

the

4ll>

to

the

hole

to

the

left.

frame using

of

(R)

the

Ill

Double chain stitch looper mechanism (1) (V61, V91, V92)

(1)

Attach the chain stitch looper holder 0
longitudinal feed

(2)

Attach the chain stitch looper
stitch looper holder

(3)

Attach chain stitch needle guard

needle plate support bracket@) using

(4)

Attach chain stitch needle guard

needle plate support plate

shaft@ using the bolt.

@)

to

0 using the screw.

(B)

the

(F)

fi

using the screw.

to

the

the chain

0

to

the

screw.

(i)

to

the

(5)

Adjust the clearance between chain stitch needle

(B)

9 and the needle

at

its lowest position.

(F)

(i) and the needle

at

(6)

-54-

guard
needle

Adjust the clearance between chain stitch needle
guard
the needle

to

its lowest position.

to

0 mm

0.05 -

0.

1 mm

with

the

with

111

Double

chain

stitch

looper

mechanism

(7)

(8)

(2)

Attach the thread handler bracket

bearing

Attach the thread take-up assembly ·
chain stitch thread take-up shaft ~ using the set
screw
mm
the needle bar

NOTE:

cap

using the stud screw.

so

that

the thread take-up assembly

above the thread handler bracket

is

at

its highest position.
Adjust
assembly

slo~

the

position

4)

of

the thread handler bracket

so

of

that

the

it

is

4D)

to

the

0)

to

the

(D

is

«!>

when

thread take-up

centered

at

the

CID.

6

(9)

Attach the looper thread guide

the

using

(1

0)

Position the thread guide pipe
protrudes
head, and

2.5mm

-55-

screw.

2.5

secure

mm

from the side

it

to

the frame using

@)

of

to

tD

the

the

the

frame

so

that
machine
screw.

it

Ill

Double chain stitch looper mechanism (3)

(11)

Attach the

screw.
NOTE:

When attaching the

~,

needle guard.

felt

it

support

should

assembly

felt

not

touch

~

using the

support assembly

the

movable

-56-

Ill

Knife

mechanism

(1)

(1) Insert the spring

using the screw

(2)

Temporarily attach
the bolt.

(3)

Align the

(4)

Loosen
so

that

be aligned

(5)

Insert

(6)

Temporarily attach the upper knife

(7)

Temporarily attach

tip

the screw

the

the

nut@)

into

the lower knife holder

@).

the

lower knife 0

of

the lower knife 0

@).

Adjust the position

stitch

width

with

the extended line equal

into

is

equal

the

upper knife differential arm

the

upper knife holder@)

to

0,

and attach them

to

the lower knife holder 0 using the lower knife holder and

with

the needle plate top, and tighten the bolt.

of

the lower knife holder 0

the

stitch tongue width.

to

the stitch width.)

(The

<9.

fi

to

the upper knife holder (D using the bolt.

to

the

upper knife differential arm

-57-

Stitch width

to

the needle plate support plate @

by

right

side

moving

of

it

to

the

left

the lower knife 0 should

<9.

or right

[l] Knife mechanism (2)

(8)

Turn the pulley

lowest position.
position

0.5

and the lower knife e when they engage.

- 1

of

mm

to

set

tHe

upper knife 6

Loosen

the upper knife 6
overlap between the upper knife 6

the screw, and adjust

so

that

to

there

its
the
is

a

(9)

(10)

-58-

Engage

9.

presses

spring.) Then, tighten the

Insert

and the lower knife
thread

the upper knife 6

Loosen

the screw

the upper knife 6 due

the

thread in between the upper knife 6

is

trimmed.

@).

screw@)

e,

and make

with

the lower knife

(The

lower knife 9

to

pressure

again.

sure

of

that

the

the

[I]

Presser

foot

mechanism

(1)

Spring

(1) Insert

(2)

(3)
(4)

(5)

the

presser arm

lifter

bar
Insert

@).
Attach
Attach

(Before attaching, make sure
Attach

into

lever@) and

the

link

49

Temporarily

the

lever adjust plate@)

the

presser

the

presser

the

hole on

into

tighten

the

The

front

shaft@

the

presser bar

the

presser bar

the

bolt

foot I ifter

foot

@)

to

needle plate.

of

the

presser

foot

should

along

with

the

main presser arm 0

lifter

arm e

lifter

lever @),and

of

the

presser bar

to

the

frame using the screw.

lever 6 and

that

the

the main presser arm 8

link

the

is

to

lifter

spring

inserted

be

the bush.

put
arm

to

the

frame using

into

the

so

that

Needle

plate

~.

,.,..,zz...,.c,..,.a...,.z.,.,.vam

into

the

spring under

0.

presser bar

the

front

///!1/

the

bush, and attach

the

the

stud screw.

lifter

lever.)

of

the

presser

The

bottom

foot should
contact.

presser bar

foot

of

the

make

the

lifter

@)

presser

complete

presser

lever

is

fitted

(6)

Adjust

the

inclination

of

the

presser foot@)

so

as

-59-

to

match

the

shape

of

the

slots on

the

needle plate.

00

Presser

foot

mechanism

(2)

:JODD~

Align

with

the

[Adjusting the
(7)

Turn the pulley
the needle plate.

(8)

Turn the upper screw (!) until
from the underside
then temporarily tighten the nut.

(9)

Loosen
Just
with
the bolt.

NOTE:

lift

stroke

the bolt

allow the stopper screw @)to make contact

the

presser

Tighten
looseness
direction

of

to

align the

of

of

the

bar I ifter lever

the

of

the

of

the thrust.

the presser foot]

presser

the lever adjust ·plate (!),

presser

bolt

so

presser

foot @ with

it

protrudes 6

bar I

ifter

arm

@,

and tighten

that

there

arm @ in the

is

mm

0.

no

:JDDD~

Nut

Lift stroke

Smm

(10)

Press

the

presser
and adjust the
mm

by inserting or removing the lower screw

the lever adjust plate

*

The

lift

specification.

(11)

Loosen
Just
contact
tighten the

(12)

Turn the upper screw (!) until
and then tighten the nut.

the screw

allow the

with

lift

stroke

presser

the main

screw.

foot

stroke

is

of

lifter lever

of

the

fi

downward,

presser

foot

<D.

different depending on

the

presser

arm stopper

presser

arm stopper

4ID

to

arm

it

0.

is

raised 1 mm,

Then,

to

5

of

the

4ID.

make

-60-

~

Covers

(1)

Attach the oil reservoir 0 using the bolt.

(2)

Attach
(L)

the

stopper plate

assembly @)to reduce

for

the

front

cover e and

looseness

screws.

(3)

Adjust
support
NOTE:

the

position

at

the

Make sure

the

chain stitch looper and

of

farthest

that

the

left

the

front

cover

position, and attach

clearances between

front

lowest position.

(4)

Attach

(5)

Attach

(6)

Attach the cloth guide set plate@) using the screw.

(7)

Attach

(8)

Attach

(9)

Attach

( 1

0)

Attach

(11)

Attach

(12)

Attach the cover

(13)

Attach

(14)

Position

(15)

Attach the

the

eccentric wheel cover

the

feed bar cover & and

the

cloth guide

the

cloth plate and

the

frame side cover 0 using

the

face plate cover 4i using

the

top

cover

the

oil

caps 0 and@.

the

presserfootoverthe needle plate.

belt

cover@ using

CD)

using

4D

using the screw.

for

feed mechanism

<9

the

the

the

cloth plate (lower)

the

screw.

using the screw.

packing@) using the screw.

screw.

the

the

(B)~

of

the

(L)

guide @

cover

screw.

screw.

and

the

stopper spring

front

cover

the

front

the

upper knife

(S)

are

0.5

ID

using

the

packing

for

front

(L)

so

cover

assembly

that

front

(L)

@),and then

cover

guide@ using

tip

and

front

mm respectively when

the

set screw.

CD)

using the screw.

Front cover

~Chain

~u---O.Smm

~'--o.smm

cover @)to the

secure

(S)

does

not

touch

the

screw.

cover

(S)

the

upper knife

(S)

stitch looper

front

cover

it

using

the

the

felt

and between

is

at

its

-61-

(STANDARD

[I]

Adjusting

~

If

II

1-4

II
II

II

II

II

II
II
II

II
V

Twin

needle overlock machine Safety stitch sewing machine

V51,81,82 V61,91,92

ADJUSTMENTS)

the height

and

H

I I

location

II

1-f

II

II

II
II
II
II
II
II

v

of the

needle

Adjustment reference needle

The

adjustment reference needle
sewing
The
stitching

(Single

is

the

left

adjustment

is

the

overlock needle.

needle overlock

needle.

reference

machine)

Needle

Surface

bar

A

for

needle

Left needle

twin-needle

for

safety

(1)

Loosen

the

cover 0 and the oil

(Safety

eedle plate

screws,

and remove

cap.

stitch sewing machine)

~-----.

Overlock stitch needle

the

face plate

tip

the

needle bar

(

the

and

pulley slowly

the

feed dog.

to

face surface A

(2)

Loosen
hole

Adjust
slot

of

of

the

the

the

the

screw @

of

the

needle plate slightly.

positions

needle plate

of

the

is

centered

* For single-needle sewing machine,

·~

needle bar clamp. Turn
needle plate support plate and needle plate support plate

at

the

needle

turn

front.
For

twin-needle sewing machine

or

safety stitch sewing machine,

needle location.

-62-

so

turn

that

the

needle

of

the

the

needle bar

tip

enters

(B)

so

that

screw toward

to

set

the
the
the
the

Dimension H

S (Standard)

H (High

lift).

E (Extra high lift)

H

(3) Turn

(4) Remove

~

[Adjusting

the

clearance between

Adjusting

and

needle guard

the

H

pulley

the

to

move

the

needle,

the

under looper,

under looper]

the

needle

the

needle plate,

(F)

needle bar

tip

and

the

V41, V61,

H

to

its highest position. Refer

the

needle plate

main feed dog, and

the

V72, V91,

V51, V81,

top

movable needle guard,

0-0.5

V71

10±0.2

V92

V82

~

by moving

the

differential feed dog.

mm

overlap

mm

10.9±0.2

11.4±0.2

to

the above table, and adjust

the

needle bar up

mm

mm

12±0.2mm

12±0.2mm

or

down.

the

(1) Insert an adjustment reference needle.

NOTE:

(2) Turn

clearance between
the

0.05 mm

(For

twin-needle

Insert

the

Before adjustment, position

the

pulley

position

when

right

to

move

the

of

the

under

they

align.

sewing

needle. Turn

machine)

the

under

looper

the

the

movable knife

under looper 0 all

looper 0 point

holder

needle bar

so

until

that

the

so

that

the

way

and

the

center

the

under looper 0

under looper 0

-63-

to

it

the

of

is

behind

left. Loosen

the

point

the

needle

point

touches each needle evenly.

under looper point.

the

bolt

@.

Adjust

so

that

it

is

3.8 mm. Adjust

and

the

needle overlap

the

0-

[Adjusting

the

movable needle guard)

Raise

the

needle

under looper 0
needle.

Loosen

and adjust the position

@

under looper 0 point and the needle.

NOTE:

so

the

that

When
the
guard

bolt

there

from

point

is

@)

of

the

is a 0-

the

center

@ should touch

0.05 mm clearance between

under looper 0

of

the

its

lowest

aligned

movable needle guard

of

the movable needle guard

needle,

with

the

position

point
the
needle.

until

the

the center

is

movable needle

aligned

of

with

the

@,

the

[Adjusting

needle guard

(F))

of

the

Align the center

0 point, and loosen

between

0.2
and including

using #30 thread (thick thread).

mm

the

needle and needle guard

for

using threads

#50 (thin thread)

needle

the

screw@. Adjust

with

with

the

under looper

the

clearance

(F) 0 to

a thread number over

or

approx. 0.3 mm

0.05­for

-64-

~

Adjusting

(1)

Loosen

the

the

Dimension A

screw

@.

over

looper

Adjust the position

of

the over looper 0

over looper and the over looper holder) by moving the over looper 0
that

the clearance between the over looper 0

looper
Before shipping,
bush
Do

tip

is

aligned

with

the

positioning plate e.

not

change

the

position

the

needle plate

bush @ has

of

the

already been adjusted

bush

top

@.

tip

and the center

(dimension

B),
so

to

dimension A (clearance between

to

the

left

or

right. Make sure

of

the

needle

is

as

in the following table.

that

it

touches the

right

@,when

side

of

the

the

the

over

guide

(2)

Loosen

the

the

bolt

@).

Adjust dimension C (the clearance between the center

over looper when

Dimension A

Dimension B 6:8mm
Dimension(

Single needle overlock machine
Safety stitch sewing machine

Twin
overlock
machine

it

is

in its farthest

Specification Standard

needle

Two needle
Mock-safety 4.8mm

four

left

position) by moving the over looper arm 6 vertically. ·

threads

®

Protrusion

1.6mm

~

~

of

the

needle and

High

lift

0

8.4mm 9.6mm

4.8mm

Extra high

1.0mm

5.6mm

lift

the

tip.

of

(3)

Remove

(4)

Adjust clearance

passes

*

the

needle plate.

®to

0.1 -0.5

over

the

protrusion

If

clearance® becomes larger,

of

mm, clearance

the

under looper.

the

over looper

-65-

®to

can

0.05-

0.2

not

catch the loop, resulting in skipped stitches.

mm

when

the

tip

of

the over looper

[j] Adjusting the

chain

stitch

looper,

chain

stitch

needle

guards

(B)

and

(F)

(Adjusting

(1) Turn

the

chain stitch looper]

the

pulley
Adjust
center

(The standard distance from the circumference
mm except

the
of

the

to

move

the

chain stitch looper 0 all the way

chain stitch looper 0

needle

for

is

1.8-2.0 mm.

special specifications. Adjust the distance using

so

e.>

(2)

Raise

the

needle from its lowest position until

center

Loosen
mm. (Make sure

*

[Adjusting chain stitch

of

the

needle.

the

bolt

@.

Adjust

that

chain stitch needle guard

For

denim specification, adjust

needle guards

the

clearance between the needle and the chain stitch looper 0

the

{B)

to

the left, and loosen

that

the clearance between the chain stitch looper 0

of

the

shaft

to

the

tip

of

the chain stitch looper 0

the

stopper plate @ and

the

clearance

and

(F)]

chain stitch looper 0

(B) 6 does

to

0.05-

(3)

not

touch the needle.)

0.1

mm.

Loosen
lowest position, and make contact chain stitch

needle guard
the screw
chain stitch needle guard
to

number over and including
approx. 0.2 mm
thread).

the

0.05 -0.1

screw

(B) 6 with

@),

and adjust

mm

point

(S}

when

for

using threads

for

using

the
point

the

is

aligned

the

needle

the needle

the

clearance between

(F)

@)

and

#50 (thin thread)

#30

0.

the
with

thread

bolt

@.

and

the

is

60

set screw

with

the

to

0.05

is

at

its

Loosen

needle 0

a thread

or

(thick

-66-

Ill

Adjusting

the

backward and forward movement

of

the

chain

stitch

looper

* The backward and forward movement

the

on

needle size and sewing condition. ·

of

the chain stitch looper may

( 1)

Loosen

feed mechanism

be

the screw

required

@),

(B)

0 and

to

change depending

and remove

the

packing

!

the

cover

@.

for

(2)

Loosen
the
sliding

the

nut@)

upper end

it

to

the

Needle

type

Backward and

of

lower end

and size

forward

for

the

longitudinal feed arm screw using the attached wrench. Sliding

the

longitudinal feed arm

will

decrease it.

movement

will

increase the backward and

DCx27 DCx27 DCx27

#9-

#11

2.8mm

-67-

#12-#17

3.1

mm

#18-#21

3.4mm

forward

the

nut 0 to

movement;

[§]

Adjusting

the

presser

foot

(1)

[Adjusting

the

left

Loosen
presser
presser
evenly

the

and

right

the

screw

foot

assembly 0

foot

when

inclination

direction]

@.

touches

the

presser

lowered. ·
[Adjusting

the

forward

of

the

presser

The
the

foot

bottom

presser
should make
complete contact.

Adjust the position

so

that

the bottom

the

needle plate

foot

assembly 0

and backward position

in

of

foot

of

the

of

the

@)

top

is

of

the upper feed dog]

[Adjusting the backward and forward position

the presser foot]

Align

the

end

of

the

the

end

of

presser

the

overlock

needle

the

needle

foot

end

Loosen

needle groove on
plate

with

groove on
assembly.

the

the

the screw @ slightly. Align
overlock needle groove on the needle plate
with
foot

assembly 0

the end

of

the needle groove on

as

shown in

the

the

presser

figure above.

of

of

@)

(

1)

Set

the

feed amount
Front feed type
(2)

Loosen

the

backward
assembly 0

the

bolt

of

Back

feed type

(3)

Loosen

the

backward

assembly 0

arm@).

bolt

or

forward

is

the

bolt

or

forward

is

to

of

the

1.2

mm

feed arm

of

the

1.0

mm when

Front feed

I

Back

6 on the level feed length control plate

feed arm

so

that

when

@).

feed arm

so

that

@).

Adjust

the

clearance between

the

upper feed dog @

@.

Adjust

the

the

position

the

is

fed

position

the clearance between the upper feed dog @ and the presser

the

upper feed dog @starts

type

The

feed

type

farthest

I

back position

0.

of

the upper feed dog @ by moving
upper feed dog @ and the presser
at

the farthest back position. Then tighten

of

the upper feed dog @ by moving

to

feed. Then tighten the

bolt

of

the

it

foot

it

foot

feed

-68-

[§] Adjusting the

presser

foot (2)

[Adjusting

®.

---~

:JDOD~

the

lift

stroke

Nut

of

the

presser

the

v

foot]

Align

with

needle plate.

(1)

Turn the pulley

the needle plate.

(2)

Turn

the

upper screw

until

it

protrudes 6
lever adjust plate @1 and temporarily tighten
nut.

(3)

Loosen
Just
with
bolt.

the

allow the stopper screw e

the

presser

bolt

to

align the

mm

of

the

bar

lifer

presser

of

the lever adjust plate @

from

the

underside

presser

bar

to

lever 0 I and tighten

foot 0 with

of

the
the

lifter

arm

make contact

the

@).

Lift stroke

Smm

(4)

Adjust
by taking the bottom screw
plate@ in and out.

*

(5)

Loosen
make contact the
presser

(6)

Loosen

8

the

lift

The

lift

stroke

specification.

the screw

arm@)

the upper screw

so

that

it

is

raised

stroke

slightly. Then tighten

of

the

presser

is

different depending on

of

the presser arm stopper & I

presser

arm stopper &

of

the lever adjust plate

1 mml and tighten

foot

to

of

the lever adjust

with

the

screw.

the

5 mm

the

the

nut.

-69-

[I] Adjusting the

presser

foot

(3)

[Adjusting

Bolt

the

rising

Screw

timing

between

0.3-0.5

I

the

upper feed dog and

mm

the

(1) Turn

(2) Adjust

(3)

the

until

it

lever adjust plate

between
presser bar

Loosen

presser

protrudes 5 mm

foot]

upper screw

0.

the

adjust screw 9

the

upper feed bar

lifter

lever@)

the

bolt

of

the

of

the

lever adjust plate 0

from

the

so

that

lifter

is

0.3-

0.5 mm.

presser bar

underside

the

clearance

@ and

lifter

arm

of

0.

the

the

(4)

Press

the

until

the

upper feed dog 8

the

needle plate

@)of

the

bar

lifter

presser bar

presser

presser bar

lever

lifter

foot

top.

@),

arm

lifter

lever

is

Make contact stopper screw

lifter

arm 0

and

tighten

(9

downward

raised 5 mm above

with

the

presser

the

bolt

of

0.

the

-70-

[1]

Adjusting

the

height

of

the

knife

0.5-1

mm

(1)
(2)
(3)

Loosen

Turn

Loosen

the

the

pulley

the

e and lower knife@

* Make sure

, Align

tip

with

plate top.

bolt

0.

AI

to

move the upper knife e

bolt

@.

Move the upper knife e up or down

to

that

the upper knife e

the

lower knife

the

needle

ign the

0.5- 1 mm.

tip

of

the lower knife @

does

with

to

its lowest position.

not strike

front

(4)

Position the lower knife @
the

@).

the

top

of

the needle plate

to

set the overlap between the upper knife

cover

(S)

fi.

width

of

the stitch tongue

@).

so

that

it

of

the needle plate

is

equal

.

to

--

Stitch

width

NOTE:

In

order

to

establish the position

move the upper knife

@,

knife

@)

(so
lower knife
knife

and temporarily loosen the set screw

that

due

to

the action

@will

e),

and tighten the set

push

of

the

e overlap

of

up

against the upper

screw@).

the

the spring the

knives,

lower

-71-

7.94mm

111

Adjusting the height of the feed

0-0.05

*

If

the

cutting

lower knife

Because

super hard metal, sharpening

not

dog

(V41,

the

necessary

capability decreases, sharpen

as

shown in the figure on

tip

of

the

for

extremely long periods

V51,

V61)

upper knife

of

the

the

left.

is

constructed

upper knife

of

time.

the

of

is

(1)

Turn the pulley

(2)

Loosen

above

(3)

Loosen

feed

(4)

Loosen
below
main feed dog

the

the

the

dog@).

the

the

to

set

the

differential feed dog 0

bolt

@.

Adjust the main feed dog

needle plate

bolt

screw

main feed dog@)

@)

8.

<9.

for

top

Adjust

Adjust

using

(1.2 mm

the

height

the

height

for

using

V61.

for

using V61).

of

the

of

V41

to

its lowest position.

@)so

that

its

second

differential feed dog 0

the

chain feed dog 0

or V 51,

-72-

0.1

mm

(0.15

mm

tooth

from

the

rear

is

so

that

it

is

flush

with

so

that

it

is

positioned

for

denim specification) below

raised 1 mm

the

main

0.3-0.5

mm

the

liJ

Adjusting

Extra high lift

specification

1

0

·

mm

(1)

Turn

(2)

Loosen
raised 0.9 mm

top.

(3)

Loosen

feed

(4)

Loosen
below
specification)

Needle

the

pulley

the

the

dog@).

the

the

the height of the

plate

to

set

the

feed dog

bolt

@.

Adjust the height

for

high

lift

specification

bolt

8.

Adjust the height

screw
main feed dog

<9.

below

Adjust

the

the

main feed dog

@)

feed

to

its highest position.

of

height

for

using

dog

the

main feed dog

or

1 mm

of

the

differential feed dog 0

of

the
V71,

@)

for

using

chain feed dog

(V71 I V721

for

extra high

V72,

V81,

V91

or

@)so

or

V92.

V81 I V821

r-T-;=;-;:=r====t.

that

its

second

lift

specification above

so

that

@)so

that

it

is

V82,

or

0.1

mm (0.15 mm

V91

I V92)

V71,

tooth

from

the

it

is

as

same

positioned

V72.,

V81 I V82

0.3~0.Smm

v!i1,

V92

o:1

mm

the

rear

is

needle plate

as

the

main

0.3-0.5
for

mm

denim

-73-

[Adjusting

the

backward and

forward

position

of

the

mah1

feed dog

Main feed bar

•

for

the

needle plate]

Main feed

Loosen
Refer

the

to

arm

bolt

the

following

~

Plain stitching
Bulky
Serging

Backtacki ng

Ruffler

Thick material

Extra

thick

material

of

the

main feed arm, and move
table, and adjust

[V41]

Main feed dog

m/m

2.1

2.8

1.0

0.7

2.4

-

-

the

main feed bar.

the

clearance between

[VS1]

Main feed

dog

2.1

2.8

-

0.7

2.4 1.2

0.9

-

m/m

the

needle plate and

[V61]

Main feed

dog

0.8

-

-

-

-

0.6

m/m

the

main feed dog.

*

Each

value in

when

the

When viewing the. machine

the

above

main feed

table

amount

from

shows

is

set

the

the

clearance between

to

the

maximum and

front,

you can

-74-

see

the

the

main feed dog

the

clearance

feed dog and

the

is

at

at

the

farthest position.

slot

the

on
end

the

needle plate

of

the

feeding.

111

Adjustin.g

the

needle thread guide

[Needle

thread

take-up]

positions

of the

needle

thread take-up

[Needle thread guide]

and

the

Needle plate

*Dimension

~

3threads

2threads

Loosen
NOTE:

the

Dimensions A and

table

forV41,

cotton

cotton

screws 0

top

V61, V71, V72, V91, V92

B

A

12

51

49.5

I@

and@).

1

8

Bare

A

D E

c

55

58

55

58.5

the

(min.)

Adjust

the

measured values

*Dimension

11.5

(min.)

11.5

(min.)

Two

needle

--------------

four threads

Mock-safety

clearance referring

when

the

table

cotton

woolen yarn

cotton

woolen

to

the

upper

c

Needle plate

for

V51, V81, V82

yarn

tables above.

knife

is

at

top

A B

48 16.5

48 16.5

16.5

48

16.5

48

its

lowest

D

c

55

(min.)

(min.)

55

(min.) (min.)

55

(min.)

(min.)

55

(min.) (min.)

position.

D

53.5

53.5

53.5

53.5

E

11.5

{r:nin.)

11.5

(min.)

11.5

(min.)

11.5

(min.)

-75-

lim

Adjusting the

position

L

K

of the looper thread take-up

*DimensiontableforV41,

3 threads cotton

------------

2threads

Loosen

NOTE:

cotton

the

screws e

Dimension F
Dimension J

Ill]

Adjusting the horizontal feeding timing
(position of the

Maximum

V61,

V71,

V72, V91,

F G H I

30

26.5

(max.)

28 23.5

(max.)

I and

measured value

measured value

I@)

is

is

9.5

9

I@)

the

the

level

V92

K L

J

27.5
12

(max.)

19

(max.)

6.

Adjust each clearance referring

feed

39 66

0

v v

when

the

when

the

eccentric

*DimensiontableforV51,

Two

needle cotton

------------

four

thread$

woolen yarn

Mock·$afety cotton

woolen yarn

to

over looper

under looper

is

at

its lowest position.

is

at

the

V81,

9.5

9.5

9.5

9.5

the

tables above.

farthest

wheel)

V82

F

G

30

(max.)

30

(max.)

30

(max.)

30

(max.)

left

H

I

27.5

26.5

(max.)

27.5

21.5

(max.)

27.5

26.5

(max.)

27.5

21.5

(max.)

position.

J

12

12 39

13.5

12

39

K

39

39

L

66

66

66

66

(1) Set
(2) Set
(3) Remove
(4) Adjust

the
the

lower

feed

machine

the

screw and

the

timing

amount

so

that

by

turning

the

the

to

the

maximum (set

lower

feeding starts.

top

cover

0.

the

level feed eccentric wheel

the

stitch length

@so

to

that

-76-

the

maximum).

the

upper feeding starts.

4screw

l1ZJ

Adjusting

the

standard position

(level feed adjust arm)

(1)

Set

the

(2)

Tilt

the
feed adjust arm
upper feed dog

machine

machine head until

with

€)

by sliding the set screw knob @

@)

does

the

horizontal feed finished.

it

not

stops.

move.

Loosen

of

the horizontal feeding

---------

the

bolt

of

the feed arm

of

the level feed length control plate 0

0.

,----~

:

Adjust the angle

of

so

the

that

level

the

Iii Adjusting

,~

....

___ \ ___

'

Q.

....

_u....

' \ -

feed amount

machine

the

bolt

the

clearance between them

(1)

(2)
(3)

{

C

\---}6

,o

Set

the

Set

the

Loosen
adjust

the

horizontal feed amount

-,

----/.._

/

\

to

so

that

of

the

_

----------

10

on the level feed length control plate

the

horizontal feeding starts.

level feed adjust lever

to

0.5

mm.

@.

Push

__r-----~

----

:

------~

0.

the slide block against the stopper screw, then

(4)

Make sure
stopper

to

that

moving

the

maximum feed amount

the

lever

can

changes

for

each

the

feed amount reading from S

specification.

-77-

to

10.

Then position

the

JB1

Adjusting the standard of the

Lowest position

vertical

feeding

(1) Turn

position).

(2)

Remove

(3)

Loosen

@}until

the

the

pulley

the

the

to

set

the

upper knife 0

screw and

bolt

of

vertical feed adjust arm block assembly 8 does

the

top

cover.

the

vertical feed adjust arm block assembly @. Move the vertical feed adjust lever

to

its highest position

(Set

the

not

move, and tighten

upper feed dog

the

bolt

to

its lowest

again.

-78-

[II

Adjusting the height of

the.

upper feed

bar

Center
of

upper

of

screw

feed dog

(1)

Turn
reading

(2)

Loosen the
there
platetop.

NOTE:

(3)

· Tighten

(4)

Apply
23

the

pulley

is

is

a 13.3 mm clearance between the center

Loosen
Make sure

the

the

mm above

to

6.
bolt

of

the

bolt

of

prtssure

the

move

the

upper feed dog

the

feed arm

adjust screw@), and release

that

the

the

feed arm

of

the

spring by tightening

nut.)

0.

Adjust

upper feed support bar 0

0.

to

its lowest position when the horizontal feed amount

the

position

the

the

of

the

upper feed bar @ by moving

of

the

screw

of

the

spring pressure.

is

positioned horizontally.

adjust screw

@).

upper feed dog and

(The adjust screw

@)

·

is

the

positioned

it

so

needle

that

-79-

Iii)

Adjusting the

clearance

between the upper

feed

dog

and

the lower feed

Check

the

height

Screw

of

the

Lowest position

dog

lower feed dog before adjusting.

(1)
(2)

(3)

For
(1)

(2)

Set

the horizontal feed amount

Turn

the

pulley

to

set the upper feed dog 0

lowest position.
Loosen

Adjust

the

screw

the

clearance between

of

the

0 and the lower feed dog @

gathering

After

adjusting

set

the

upper feed dog 0

Loosen

Adjust the clearance between the upper feed dog

0 and

1 mm from A mm.

the screw

the

the

above

of

the

needle plate

top

to

6.

upper feed

the

to

0.2

steps,

turn

to

its highest position.

upper feed

so

that

dog

upper feed dog

mm.

the

dog

it

is

decreased

to

pulley

its

0.

to

0.

Fine adjustment

1)

Loosen

(
(2)

Insert a wrench

presser
Turn the wrench clockwise
feed dog.
Turn

upper feed dog.

*

The

has

the

set screw 0

arm shaft

the

wrench counterclockwise

adjusting hole

already been adjusted

into

bush

of

the

of

the

machine head.

the

adjusting hole

8.

to

lower

presser

to

arm shaft

45°

before shipping.

to

the

raise

bush

of

the

upper

the

@

-80-

1m

Adjusting

the

vertical feed amount

of

the

upper feed dog

(1)

Set

the

set
control plate
for

back feed type.

(2)

Turn the pulley
highest

(3)

Loosen

@).

lever
mm
different depending

po!;ition.

the

Adjust the position

@)

above the needle plate top.

screw knob

0

to

to

set

bolt

of

so

that

the upper feed dog

of

the vertical feed length

1 - 2

for

front

feed type, 1 - 3

the upper feed dog

the vertical feed adjust lever

of

the vertical feed adjust

(The

on

specification.)

@to

is

raised

distance

its

4.6
is

*

For

front

feed type

For

example, when the
feed length control plate
vertical feed amount
follows:

(0.9 + 0.2) = 3.5

4.6-

(upper feed dog height)- (lower feed dog height +
clearance between upper and lower feed dogs)
actual vertical feed amount

*

If

the material
lower.
higher.

If

it

is

with

is

thin,

thick,

plain stitching

set

screw knob

is

set

of

the upper feed dog

set

the vertical feed amount

set

the vertical feed amount

to

of
2,

the vertical

the

actual

is

as

=

-81-

Iii

Adjusting

*

The

differential ratio

main feed arm).

(1)

Remove

the

packing

the

the

cover

@I

and

differential ratio

can

be changed according

for

feed mechanism

the

screw

@).

(B)

to

0

1

the position

Nut

(2)

Loosen

the

of

the main feed shaft (the length

the

nut, and change

main feed shaft

e.

the

Loose.

position

of

the

of

Specification

Plain stitching

Ruffler

Bulky

Max. stitch length

:------,

...

,

__

..

~,

>----~

Differential ratio

~·

3.8mm

3.2mm

2.6mm

0.7-2.0

0.8-2.8

1.0-3.0

Position
mark

of

feed arm

1

1

i

of

match

main

Upper

Middle

Lower

Main
feed arm

Lower

Lower

Lower

Plain stitching
(Serging)

Rufflertl)

Bulky

(Denim)

[Main feed arm]

~Upper

[Main feed shaft]

~

t

f

Lower

Denim

Serging

S.Omm

5.9mm

0.7-1.4

0.7-1.3

f

Lower

Upper

t

-82-

Upper

Upper

HIJ

Adjusting the

clearance·

between the

Adjust the clearance between the cloth plate 0 and
the

cloth

shape

plate

of

the needle plate@

and

the needle plate

to

0.3

mm

- 1

m·m.

Loosen
forward
needle plate
collar@.

Use
clearance.

the

set screw

clearance between the cloth plate 0 and the

@ by turning the cloth plate support

the adjust screw 0

to

adjust

to

the

backward and

adjust

the

sideways

-83-

( TROUBLESHOOTING )

[)]

Needle

thread

breakage

(overlockingl

PROBLEM

(i) Incorrect threading.

®

Excessive

®

Poor

® Needle groove or needle

pressure

thread quality.

of

tension

disk.

eye

poorly finished.

® Incorrect looper thread take-up position.

@ Thread

(/) Needle plate

® Under looper

passage

has

has

has

flaws.

flaws.

flaws.

~

~

~

~

~

~

~

~

Refer

to

nThreading

Adjust

to

suitable

Use

thread

of

Change

needle for a good

Adjust

to

proper position.

Change

part with new

Replace

it

with new one, or smooth or buff surface with oil and stone.

Flaws~

r

Replace

it

with new one, or smooth or buff surface with oil

ADJUSTMENT

diagram. n

pressure.

good quality.

one.

'-Burr

one.

and

stone.

® Incorrect timing

of

needle

and

looper.

~

Adjust

to

correct timing, needle

clearance

and

position

of

needle guard.

-84-

Needle thread breakage (double

chain

stitching)

PROBLEM

<D

Incorrect threading.

®

Excessive

®

Poorthread

@ Needle groove or· needle eye poorly finished.

® Incorrect needle

® Incorrect

(l) Thread passage has flaws.

® Chain stitch

® Insufficient clearance

pressure

quality.

looper

looper

of

tension disk.

thread

thread

has flaws.

of

guide position.

take-up

position.

needle guard.

~

~

~

~

~

~

~

~

---.

Refer

to

"Threading diagram."

Adjust

to

suitable pressure.

Use

thread

of

Change needle

Adjust

to

proper position.

Adjust

to

proper position.

Change

Change

it

for a new

it

for a new

~Blunt

~

Adjust

to

correct clearance between needle and needle guard.

ADJUSTMENT

good quality.

for

a good one.

one

or

one

or

aws

smooth surface

smooth surface

with

with

oil stone

oil stone

or

or

buff.

buff.

®>

~

Incorrect

Looper

timing

of

needle and looper.

thread breakage

PROBLEM

<D

Incorrect threading.

®

Excessive

® Poor

@ Incorrect looper

pressure

thread

of

quality.

thread

® Thread passage has flaws.

® Needle plate has flaws.

tension disk.

take-up

position.

---..

___..

---..

---..

---..

---..

---..

Adjustto

correct

timing,

ADJUSTMENT

Refer

to

"Threading diagram."

Adjust

to

suitable pressure.

Usethreadofgoodquality.

Adjust

to

proper position.

Change

it

Change

for a new

it

for a new

one

one,

needle clearance and position

or

smooth surface

or

smooth

or

buff

with

oil stone

surface

with

of

needle guard.

or

buff.

oil and stone.

-85-:-

Skipped

stitches

{overlocking)

PROBLEM

<D

Incorrect threading.

®

Excessive
In
needle.

<D

Incorrect position

® Insufficient or

left

@ Large clearance between needle and over

looper.

@ Incorrect

In
and under looper

the

case

of

over looper

the

case

or

insufficient pressure

skipping between over looper and

of

looper thread take-up

too

much movement

height

of

of

needle bar.

skipping between over looper

of

tension

to

the

~

disk~

~

~

~

~

ADJUSTMENT

Refer

to

"Threading diagram."

Adjust

to

suitable pressure.

Adjust

to

correct position.

Adjust

the

position

Adjust over
needle and over looper.

Adjust

to

suitable height.

of

looper and under looper

over looper

so

it

is

appropriate.

to

appropriate clearance between

<D

Large clearance between under looper and
over looper

® Top

of

over looper

In

the

case

and needle.

<D

Large clearance between under looper and
over looper

® Top

of

under looper

@ Incorrect position

@ Incorrect

® Incorrect

height

timing

blunt

or

bent.

of

skipping between under looper

blunt

or

bent.

of

needle guard.

of

needle bar.

of

under looper.

----..

----..

~

~

~

~

_____..

Adjust

Change

Adjust

Change

Adjust

Adjust

Adjust

to

appropriate clearance.

it

for

a new one

to

appropriate clearance.

it

for a new

to

correct position.

to

suitable height.

to

correct timing.

or

one or smooth

smooth

Blunt

with

with

oil stone

oil stone

or

or

buff.

buff.

-86-

Skipped

stitches

(double

chain

stitching)

PROBLEM

<D

Incorrect

® Excessive pressure

@ Tension disk pressure

® Incorrect

In
movement

<D

Large clearance

® Incorrect position

the

threading.

looper

case

of

of

of

thread

skipping

looper.

between

of

needle

too

weak.

take-up

during

looper

needle

thread.

position.

rightward

and

guard.

needle.

-----..

-----..

-----..

-----..

-----..

___..

Refer

to

Adjust

to

Adjustto

Adjust

to

Adjust

to

Adjust

to

ADJUSTMENT

"Threading

suitable pressure.

appropriate

correct position.

diagram."

pressure.

~t

appropriate

correct position.

position.

@

Top

of

looper

® Incorrect

In
movement

(j) Large clearance

the

case

timing

of

skipping

of

blunt

of

double

looper.

between

or

bent.

chain stitch

during

looper

leftward

and needle.

looper

-----..

-----..

___..

Change

Adjust

Adjust

it

for a new

to

correct

to

provide small clearance.

one

or

smooth

with

oil

stone

timing.

~t

Big

clearance

or

buff.

® Incorrect

timing

of

double

chain stitch looper.

-----..

Adjust

to

correct

timing.

-87-

~

Needle breakage

PROBLEM

<D

Poor

thread

quality.

® Needle size

@ Incorrect needle location.

® Needle and
® Incorrect adjustment

too

small.

looper

out

of

sequence.

of

needle guard.

[j] Improper thread tension

PROBLEM

<D

Poor

thread

quality.

®

Needlesizetoosmall.

@ Tension disk pressure

too

weak.

---..

----..

----..

----..

~

----..

----..

----..

ADJUSTMENT

Use

thread

of

good quality.

Change

Adjust

it

for

larger one.

Correct needle location.

the

Adjust

position

to

correct position

of

needle guard and looper properly.

ADJUSTMENT

Use

thread

of

good quality.

Change

Adjust

it

for

larger one.

to

suitable pressure.

for

needle guard.

® Incorrect position

of

thread

take-up.

Ill Improper chaining-off

PROBLEM

<D

Incorrect threading.

®

Excessive

@ Tension disk pressure

® Incorrect position
® Incorrect position

® Incorrect installation

CV

Needle plate has flaws.

pressure

of

tension disk.

too

weak.

of

looper

of

needle

of

chain feed dog.

thread

thread

take-up.

take-up.

----..

Adjust

to

correct position.

(~verlocking)

ADJUSTMENT

----..

----..

----..

----..

----..

----..

----..

Refer

to

Adjust

Adjust

Adjust

Adjust

Adjust

Change

"Threading diagram."

to

suitable pressure.

to

appropriate pressure.

to

correct position.

to

correct position.

to

correct position.

it

for a new

one, smooth

with

oil stone,

or

buff.

® Incorrect

timing

between

needle and looper.

----..

Adjust

to

correct

timing.

-88-·

Improper chaining-off (double

chain

stitching)

PROBLEM

<D

Incorrect threading.

® Poor

®

® Tension disk pressure

thread

Excessive

quality.

tension disk pressure.

too

weak.

® Excessive presserfoot pressure

® Incorrect position

(l) Incorrect position

® Incorrect installation

differential

® Chains

get

® Existence

chaining-off

feed dog

out

of

of

clearance

of

presser

of

thread

guide.

of

looper

thread

of

main feed dog and

feed dog.

at

pressing

foot.

take-up

part

for

~

~

~

~

~

~

~

~

~

-+-

Referto

Replace

Adjust

Adjust

Adjust

Adjust

Adjust

Adjust position

Move feed dog

Change

"Threading diagram."

with

good quality thread.

to

suitable pressure.

to

suitable pressure.

to

suitable pressure.

to

correct position.

to

correct position.

it

for a new

ADJUSTMENT

while

maintaining

to

right

or

one. For model V61, replace presser

left.

the

same level.

foot.

®

lncorrecttiming

1§1

Puckering

<D

Excessive

® Thread size

®

Excessive

® Needle size

® Incorrect

®

Height

between

PROBLEM

tension disk pressure.

too

thick.

presser

foot

pressure.

too

big.

differential

offeed

ratio.

dogs.

needle and looper.

~

~

~

~

~

~

~

~

~K.

~

__)

Adjusttocorrecttiming.

Adjust

to

appropriate pressure.

Change

Adjustto

Adjust

itforthinnerthread.

suitable pressure.

Change

it

to

correct ratio.

Adjust

to

appropriate height.

for

one suitable

If

there

perform chaining-off sewing.

ADJUSTMENT

is

a clearance here, you

for

thread

and materials.

can

not

(l) Knife

® Knives are

width

too

not

large.

sharp.

~

~

Adjust

to

proper

Change them
(If

the

engagement
adjusted,
the

the

engagement

width.

for

new

knives

is

ones,

of

the

do

correct.)

-89-

or

upper and

not

cut

regrind.

the

the

materials

lower

well.

knives

In

is

this

not

case,

correctly

adjust

so

[1]

Slippage

cloth

PROBLEM

<D

Excessive pressure

® Knives are

@ Feed

00

Double

dog

not

too

PROBLEM

<D

Under looper have flaws.

® Insufficient angle

of

presser

sharp.

high.

scooping

of

under

looper.

foot.

~

-..

-..

(overlocking)

-..

-..

Adjust

to

suitable pressure.

Change

them

Adjusttoa

Change

Increase angle.

lower

it

for a new

ADJUSTMENT

for

new

ones

level.

ADJUSTMENT

one

or

or

regrind.

smooth surface

with

oil stone

or

buff.

-90-

( NEEDLE SIZE AND

Refer

to

the following table when replacing a needle or upper looper,

material thickness.

IIJ

V41, V61, V71, V72, V91,

(1)

Three threads

the

thickness

High

#17­#13

#9-12

~h

Ov

A (2·25)

(2·15)

B

(2·35)

c

(2·45)

H

(2·5)

G

(2·5)

K

For

woolen

The numbers in

yarn

Standard

#9-12

#13

the

()show

-16

UPPER

V92

lift

Extra high

21

-16

#9-21
#9-21

of

the

over looper.

LOOPER )

(2)

Two threads

lift

~h

0

p

(2·55)

(N)

(2·4)
(2·35).

L

(2·2)

M

Q

(2·5)

The numbers in

to

find one appropriate

Standard

High

#9-12

#13

#9-12

the

#17

thickness

#13

the

-16

()show

lift

-16

-21

of

Extra high

#9-21

the

over looper.

to

the

lift

~

V51, V81,

(1)

Two threads

e

~

r

(2·15)

B

(2·0)

D

(1·9)

J

(2·5)

G

(2·5)

K

For

woolen

yarn

The numbers in

e

V82

with

four needles

High

lift

2.2 2.5 3 1.8

#9

-12

#13

#9 #9

-16 -12
#13

-16 -14

the

()show

the

thickness

-10

#11

ofthe

over looper.

Extra high

lift

2.2 2.5 3

#9

#9

-18

-18
#9 #9

#9

-18 -18

-18

#9

-18

(2)

Mock-safety stitching

~h

0

(2·0)

F

(1·8)

E

(2·0)

R

The

numbers

in the

()

High

#9-12

#1-3

show

the

lift

-16

thickness

Extra high

#9-18

of

the over looper.

lift

-91-

(MATERIAL

Stitch

width

Model1 Standard

V41

01,

10

(stitch

width 5 mm

, 03,

OS,

07, 09,

15

THICKNESS AND STITCH WIDTH )

Looper

height

7.5mm

6.5mm

5.3mm

specification
specification

(height

5.3 mm)

or

specifications

less)

Looper path

E l Extra high

~

H l High

s l Standard

*

Use

or

Use

when

When the stitch width
02,

11

specifications

I
I

I

I

the

more.

the

High

lift

high

high

the

lift

lift

lift
lift

material thickness

(6.5 mm) Extra

is

6 m m or more

Stitch

width

7.5mm

6.5mm

5.3mm

when
or

extra

is

6 mm

For

extra

bulky knits
For

thin

materials, bulky knits

For

thin

materials

the

stitch

high

lift

or

more.

high

Use

heavy

materials

and

medium

thick

and

medium

thick

width

is

specification

lift

(7.5 mm)

..

and

6 mm

V51

i

V61
V72
V82
V92

----------

When the stitch width

I

I

.

----------

----------

22,

24,

27,

33,

37,41,45,49,

is

5.9

mm

or

less

When the stitch width

01,

02

specifications

221

41

specifications

631 651

95

specifications

57

specifications

is

6 m m or more

31

specification

--------

85 -92

specifications
02,081091
31 I 331
691

51 I 57

71 I 751

11

specifications
specifications

77 I 92

specifications

-92-

TIMING GAUGE TABLE

c

[]

V41,

61

c

·=.!!

cu-o

.s=ep

u

CIJ

CIJ

c

:C.s:::

5~

ot;

.s:::

u

-~

t;

.:.I.

u

Oep

"i:=ti

CIJep
>ep

Oc

)

f

.:.I.

m

Needle plate

top

<(

Guide bush positioning plate

Center

B

80.1

of

over looper shaft

Standard

Overlock stitch needle

----------

A

B

10±0.2 10.9±0.2 12±0.2

46.1

c 4.8±0.3

Over looper

Under looper

Double chain stitch

Double chain stitch needle

NOTES:

Letters
For specificationS, H, and
positioning
guide
Letters e,

looper

I,

J, and K

bush

f,

D 1.6±0.2

e

22.4

f 6.8

g

H 3.8±0.2

I

J 64±0.1 64±0.1

10.6

k

show

the

dimensions

E,

plate. For specification U, push
positioning
and g,

show

plate.

the

reference dimensions.

±0.1

2_

8.2

8.4

push

(S)

the

for

over

High

lift

(H) Extra

46.1

±0.1

4.8±0.3
0

20.8 21.2

8.4

10.8

3.8±0.2
2_

8.2

9.3

the

V61.

looper

the

guide

over

holder against

looper

guide

high I ift

46.1

±0.1

4.8±0.3
1

±0.2

9.6

10.9

3.8±0.2

2_

8.2

64±0.1

9.9

the

holder

(E)

right

against

Ultra

of

the

the

high

guide

left

of

lift

bush

the

(U)

-93-

liJ

V51

<(

Center

of

crank shaft

Guide bush positioning plate

High

lift

(H) Extra

Overlock stitch needle A 11.4±0.2 12±0.2

------------

8

c 5.6±0.3 5.6±0.3

D

e 20.8 21.2

46.1

±0.1

0 1

f 8.4

Over

Under

looper

looper

g

cT

DT

eT

f T

gT

H

10.5 10.5

4.8±0.3
0

20.4

8.9 .

10.8

3.8±0.2 3.8±0.2

high

46.1

9.6

lift

±0.1

±0.2

*
*
*
*
*

80.1

(E)

8

Ultra high

Center

lift

(U)

of

over

looper

shaft

NOTES:

Letter~)Vith

For specification
positioning plate. For specification
guide
Letters e,

a

...

mark

show

Hand

E,

push

bush positioning plate.

f,

and g, show

the

reference dimensions.

the

dimensions

the

over

U,

looper

push

-94-

for

mock-safety stitching (stitch

guide

holder against

the

over looper

guide

holder against

the

formation

right

of

the

the

512).

guide

left

bush

of

the