Juki Mo-6000g series Quick start guide

a.JUKI®

Super-High-Speed Ovel1ockMachine

High-Speed Ovel1ockMachine/SafetyStitch Machine

M0-6000S

series

M0-6900G

series

(forExtra-heavy-weightMaterials)

High-Speed VariableTop

Feed

OverlockMachine

M0-6900Rseries

M0-6900J

series

(forExtra-heavy-weight Materials)

ENGINEER'S MANUAL

·~:-·

·:~··:.:.:

,:·:

\

....

-~:~:

~,:·:·:·:·::·:·:·:·:;·~·:·:·:\·.:.·.·,::_::::

....

.

:.

·,:

.·

....

·.·.·.:.-.:

..

-~·

...

:\::

:

..

:.:

:~:

~::>:.::

::·.:::.:::L.-::.:

..

:,.·.::·,:

..

·

..

::>:.:.:;..:.:

..

:.>:::

·::::.:./::.:::::·::::

..

:~::::::·:~:.:~::::::·::::·::::~:g~,:::::::·:·:·::~:::\:::.·:::::)\;:y:

·:::

::·:·.

:·:·:.~~

29355807

No.E350-01

!

I

I·

I

11

I

l

ii

ll

11

!

PREFACE

This Engineer's Manual is written for the technical personnel who are responsible for the service and maintenance of

the machine.

The Instruction Manual for these machines intended for the maintenance personnel and operators at an apparel

factory contains operating instructions in detail. And this manual describes "Standard Adjustment", "Adjustment

Procedures", "Results

of

ImproperAdjustment", and otherimportantinformation which are notcovered bythe Instruction

Manual.

It is advisable to use the relevant Instruction Manual and Parts List described below together with this Engineer's

Manual when carrying out the maintenance ofthese machines.

In addition, for the motor for the sewing machine with thread trimmer, refer to the separate Instruction Manual

or

Engineer's Manual for the motor. And for the control panel, refer to the Instruction Manual for the control panel.

This manual gives the "Standard Adjustment" on the former page under which the most basic adjustment value

is

described, and

on

the latterpage "Results of ImproperAdjustment" under which stitching errors and troubles arising

from mechanical failures are described together with the

CIAdjustment

Procedures".

~

MO·6900S MO-6700S MO·6900G MO·6900R MO·6900J

Part No. Part No. Part No. Part No. Part No.

N

Instruction Manual 29351707 29351707 29351707 29356409 29363009

Parts List 29351806 29352408 29352309 29356201 29362803

From the Library of Superior Sewing Machine & Supply LLC

CONTENTS

1. SPECIFICATIONS ......._...•....•..•••.•.••••...•••..••••.••.••••••..•.••...••..•........•..•••.•..•••.••.•... 1

(1) MO-6700S SERIES ........................................................................................................... 1

(2) MO-6900S SERIES ...........................................................................................................2

(3) MO-6900G SERIES

•••••••..•••••••..•••••••...••••••..••••..••••.•••••.•.•••.•....•.••...•••••...•.•••••.•.•.•.•••.•.•.•••.•.

3

(4) MO-6900R SERIES •.••.•••••••••••.••••.•••.••••••••.•••••.......•.•..••..•••...•.......•.•.•••.•.••..•...•..••.....•.•.•...• 4

(5) MO-6900J SERIES.............................................................................................................5

2. MODEL NUMBERING SYSTEM ..••.••.•••..••••...••...•.•••••••.•••.•..•.••.•...•..•...••.•...•..... 6

3. STANDARD ADJUSTMENT ....••.•.•.•..•••..•.••••.••••••....•......•..•.•••.••......•.•.••.••.....•.. 8

(1)

Adjusting

the

needle

height

............................................................................................8

(2)

Positioning

the

throat

plate

............................................................................................ 8

(3)

Installing

position

of

the

needle Clamp .......................................................................

10

(4)

Adjusting

the

length

of

the

lower

looper

holder

(Applicable

only

to

MO-6.616S / MO-6916R, G, J

series)

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

10

(5)

Adjusting

the

lower

looper

._

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

12

1)

Returning amount of the lowerlooper .................................................................................................... 12

2)

Clearance between the lowerlooperand the needle .............................................................................

12

(6)

Position

of

the

upper

looper

guide

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

14

(7)

Positioning

the

upper

looper

holder

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

16

(8)

Positioning

the

upper

looper

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

18

1) Height of the upper looper.................................................................................................

~

.................... 18

2) Longitudinal position

of

the upper looper................................................................................................ 18

(9)

Adjusting

the

double

chain

looper

· (Applicable

only

to

M0-6~

16S/MO-6916R, G, J series) ............................................... 20

1) Returning amount of the double chain looper.........................................................................................

20

2) Longitudinal motion {Avoid motion) ........................................................................................................

20

3) Clearance between the double chain looperand the needle ................................................................. 20

(10)

Adjusting

the

height

and

clearance

of

the

needle

guard

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

~

.......................... 22

1) For 1-needle

or

2-needle overlock machine ...........................................................................................22

2) Forsafely stitch machine ........................................................................................................................ 22

(11)

Adjusting

the

height

of

the

feed

dog

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

24

(12)

Adjusting

the

tillt

of

the

feed

dog

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

24

(13)

Adjusting

the

differential

feed

ratio

...........................................................................26

(14)

Longitudinal

position

of

the

feed

dog

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

26

(15)

Adjusting

the

presser

foot

..........................................................................................28

1) Adjusting the tilt of the presser foot ........................................................................................................

28

2) Adjusting the micro-lifting mechanism of the presserfoot ......................................................................

28

(16)

Positioning

the

upper

knife

arm

shaft

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

30

(17)

Positioning

the

upper

and

lower

knives,

and

available

overedge

widths

.............. 30

1)

lower

knife .............................................................................................................................................30

2) Upper knife .............................................................................................................................................30

3) Overdging width......................................................................................................................................30

(18)

Resharpening

of

the

knife

..........................................................................................32

(19)

Position

of

the

thread

cam

(Applicable

only

to

MO-6~16~

series)

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

32

1) Adjustment of the thread cam.............................................:................................................................... 32

2) Adjusting looperthread cam thread guides A and B and the looper thread cam nail............................. 32

From the Library of Superior Sewing Machine & Supply LLC

rl!

~

11

1·

I

l~i

11

I

1

11

,,

~

I

!I

•l

!I

~

I

(20)

Adjusting

the throat plate support.............................................................................

34

(21)

Adjusting

the

feed mechanism

cover

presser.......................................................... 34

(22)

Adjusting

the

looper

cover

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

36

(23)

Adjusting

the

cloth

chip

cover

...................................................................................36

(24)

Adjusting

the needlemechanism............................................................................... 38

(25}

Position

of

the

upper

looper

lubrication

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

40

1)

Orientation

of

the lubricating pin ............................................................................................................. 40

2)

Setting the lubricating pin ....................................................................................................................... 40

(26)

Longitudinal

momentum

of

the

top

feed

dog

(Top feed amount)...........................

42

(27) Vertical

momentum

of

the

top

feed

dog

.................................................................... 44

(28)

Adjusting

the

height

of

the

top

feed

dog

................................................................... 46

(29)

Locus

cut

of

the

top

feed

dog

....................................................................................48

(30)

Adjusting

the

longitudinal

position

of

the

top

feed

dog

.......................................... 48

(31)

Adjusting

the lateral

position

of

the

top

feed

dog

.................................................... 50

(32)

Position

of

the

motion

of

the

top

feed

dog

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

52

(33)

Adjusting

the feed

bar

guides

A and B.................................................................

~

.•..

54

(34)

Adjusting

the

top

feed

dog

pressure.........................................................................

56

(35)

Lifting

amount

of

the

top

feed

dog

(when operating

the

pedal)••....••..••..••.......•..••.•

56

(36)

Height

of

the presser (pedal operation)..................................................................... 58

(37}

Lifting

amount

of

the

top

feed dog (when

the

presser

lifting

lever

is

operated)

.••

60

(38) Position

of

the

thread

guides

and

the

looper

thread

take-ups................................ 62

(39)

Adjusting

soft

chain making mechanism.................................................................. 64

1)

Replacing· the parts with those exclusively designed

for

making soft chains ......................................... 64

2)

Adjustment value ....................................................................................................................................64 -

3} Important points

in

adjustment ............................................................................................................... 65

(40) Position

of

the

thread

guides

and

the

looper

thread take-ups

of

MO-6900G (J)... 66

4. ADDITIONAL INFORMATION AND PRECAUTIONS.....................................68

(1) Thread

tension

...............................................................................................................68

1)

Strength of tension spring.......................................................................................................................68

2)

Springs used

for

each model. .................................................................................................................68

(2) Upper looper·..................................................................................................................69

(3) Center-to-center distance

of

the

upper

looper

holder

............................................... 69

(4) Caution

in

assembly

......................................................................................................69

1) Application

of

sealant .............................................................................................................................

69

2) Precautions to

be

taken with respect to the lubricating components ...............................................

~

......

71

(5) Kinds

of

motor

pulleys,

belts

and frame

support

plate

bolts

.................................... 72

1)

Motorpulleys

and

belts........................................................................................................................... 72

2)

Pat

No.

of

frame support plate bolt .........................................................................................................73

(6)

Inspection

and replacement

of

the

cartridge

filter

..................................................... 73

5. ADJUSTMENT

OF

THE NEEDLE HEIGHT AND LOOPER TIMMING........... 74

(1) MO-60006. SERIES ........................................................................................................

74

6. TROUBLES AND CORRECTIVE MEASURES...............................................75

7. DIMENSIONS

OF

TABLE

••...••.••..••••....•.•..•.•.••••.•..•••.•..••••..••.••••••..•••.•••.••..••.•..

87

(1) Semi-sunken

type

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

87

(2) Fully-suken

type

..................u

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

88

From the Library of Superior Sewing Machine & Supply LLC

1

..

SPECIFICATIONS

(1) MO-6700S SERIES

No.

Item

1

Model

2

Description

3

Stitch

type

F.

S.

T.

4

Sewing

speed

5

Stitch

length

6

Needle

gauge

7

Overedging

width

8

Differential

feed

ratio

9

Needle

bar

stroke

10

Needle

tilt

angfe

11

Needle

12

Presser

lifting

amount

13

Presser

foot

pressure

14

Stitch

acfJUstlng

method

15

Upper

knife

16

Differential

feed

adjustment

17

Weight

18

Lubrication

19

Lubricating

oil

20

Needle

cooler

21

Needle

thread

heat

remover

22

Micro

presser

lifting

device

23

Motor

Specifications

M0-67048 M0-67148 . M0-6716$

1-neecile

Overlock

2-needle

Overlock

2-needle

Safety

stitch

machine

JISE13 JISE24 JISE13+D12

(USA

standard

:

504)

(USA

standard:

514)

(USA

standard

=

516)

7,000,pm

. 0.8to4mm

1.5to4mm

-

2,

2.4,

3.2

mm

2.

3.2,

4,

4.8

mm

1.6,

3.2,

4,

4.8

mm

32,4,4.Bmm

3.2,

4,

4.8,

6.4

mm

Gathering

1 =2

(Max.1

:

4),

Stretching

1:

0.7

(Max.1

:

0.6)

24.5mm

20·

ORGAN

DC

X

27

(Standard)

(DC

X 1

can

be

used

as

well.)

7.0mm

6.5nm

7.0mm

49N

(5Kg)

By

pushbutton

FlatknHe

By

lever

with

micro

adjustment

medlanism

28kg

Gear-type

automatic

lubrication

•

JUKI

MACHINE

OIL

18

(Equivalent

to

ISO

VG

18)

Optional

Provided

as

standard

2P

550W

(In

case

of

7,000

rpm)

2P

400W

(in

case

of

less

than

7,000

rpm)

* JUKI MACHINE

OIL

18 (Equivalent to ISO

VG

18)

Part No. : MML018900CA (900 mg)

-1

-

111

11

I'

·I

11

II

'I'

11

ij

L

I

r·

!I

·1

j

~

i

11i.

I:

li

111

Ii

1'

Ii

~

i

ii

'I

I

i

I

l

.I

I

From the Library of Superior Sewing Machine & Supply LLC

(2)

MO-6900S

SERIES

No.

Item

Specifications

1

Model

MD-69045

M0-6914$ MQ-69168

2

Description

1-needle

Over1ock

2-neeclle

Over1ock

2-needfe

Safety

stitch

machine

3

Stitch

type

F.

S.

T.

JIS

E13

JIS

E24

JISE13+

D12

(USA

standard

:

504)

(USA

standard:

514)

(USA

standard

:

516)

4

Sewing

speed

8,500rpm

8,000rpm

5

Stitch

length

0.8to4mm 1.5to4mm

6

Needle

gauge

-

2,

2.4,

3.2

mm

2,

3.2.

4,

4.8

mm

7

Overedging

width

1.6,

3.2,

4,

4.8

mm

3.2,

4, 4.8

mm

3.2,

4,

4.8,

6.4

mm

8

Differential

feed

ratio

Gathering

1:2

(Max.1

:

4),

Stretching

1:0.7

{Max.1

:

0.6)

9

Needle

bar

stroke

24.5mm

10

Needle

tilt

angle

20·

11

Needle

ORGAN

DC

X27

(Standard)

(DC

X1

can

be

used

as

weil.)

..

12

Presser

lifting

amount

7.0mm

6.5mm

7.0mm

13

Presser

foot

pressure

49N

(5Kg)

14

Stitch

adjusting

method

By

pushbutton

15

Upper

knife

Flat

knife

16

Differential

feed

adjustment

By

lever

with

micro

adjustment

mechanism

17

Weight

28kg

18

Lubrication

Gear-type

automatic

lubrication

19

Lubricatina

oil

"

JUKI

MACHINE

OIL

18

(Equivalent

to

ISO

VG

18)

20

Needle

cooler

Provided

as

standard

(Exduding

some

of

subclass

machines)

21

Needle

thread

heat

remover

Provided

as

standard

{Excluding

some

of

subdass

machines)

22

Micro

presser

lifting

device

Provided

as

standard

23

Motor

2P

550W

(In

case

of

not

less

than

7,000

rpm)

2P

400W

(In

case

of

less

than

7,000

rpm)

* JUKI MACHINE OIL

18

(Equivalent to ISO VG 18)

Part No. : MML018900CA (900 m ! )

-2-

From the Library of Superior Sewing Machine & Supply LLC

(3) MO-6900G SERIES

No.

·

Item

Specif

cations

1

Model

M0-6904G

M0-6914G M0-6916G

2

Description

1-needle

Overlock

2-needle

Overlock

2-needle

Safety

stitch

machine

3

Stitch

type

F.

S.

T.

JIS

E13

JISE24 JIS E13+ 012

(USA

standard

:

504)

(USA

standard

:

514)

(USA

standard:

516)

4

Sewing

speed

6,000rpm

5

Stitch

length

2.5to5mm 2.5to4mm 2.5to5mm

6

Needle

gauge

-

2.6mm

4.8mm

7

Overeclging

width

4.8,

10mm 6.4mm 4.8,6.4mm

8

Differential

feed

ratio

Gathering

1:

1.75

(Max.1

:

3.8)

Gathering

1:2

(Max.1

:

3.8)

Gathering

1:

1.75

{Max.1

:

3.8)

Stretchirg

1:

0.6

Stretching

1:

0.7

(Max.1

:

0.6)

Stretching

1:

0.6

9

Needle

bar

stroke

28.8mm

10

Needle

tilt

angle

20·

11

Needle

ORGAN

DO

XS

12

Presser

frfting

amount

Max.Bmm

13

Presser

foot

pressure

49N(5Kg)

14

Stitch

acfjUSting

methcxJ

By

pushbutton

15

Upperknife

Flat

knife

16

Differential

feed

adjustment

By

lever

with

micro

adjustment

mechanism

17

Weight

28kg

18

Lubrication

Gear-type

automatic

lubrication

19

Llbricating

oil

*

JUKI

MACHINE

OIL

18

(Equivalent

to

ISO

VG

18)

20

Needle

cooler

Provided

as

standard

(Excluding

some

of

subclass

machines)

21

Needle

thread

heal

remover

Provided

as

standard

(Excluding

some

of

subclass

machines}

22

Micro

presser

lifting

device

Provided

as

standard

23

Motor

2P400W

• JUKI MACHINE OIL 18 (Equivalent to ISO VG 18)

Part No. : MML018900CA (900 m 2)

-3-

·-

t

I

l1

I~

~l

11

II

-!

II

I

From the Library of Superior Sewing Machine & Supply LLC

11

!11\·

I,

'I

l

fi

11

II

·I

i

11

!i

(4)

MO-6900R

SERIES

No.

Item

Specifications

1

Model

M0-6904R M0-6914R M0-6916R

2

Feed

type

Vertical

amount

of

top

feed

dog

3

Description

1-needle

Overlock

2-needle

Over1ock

2-needle

Safety

stitch

r:nachine

machine machine

4

Stitch

type

F.

S.

T.

JIS

E13

JIS

E24

JISE13+D12

(USA

standard :

504)

(USA

standard

:

514)

{USA

standard

:

516)

5

Sewing

speed

7,000

rpm

(longitudinal

amount

of

top

feed

less

than

6rrm)

6,000

rpm

(longitudinal

amount

of

top

feed

6

to

8.5

mm)

6

Stitch

length

0.8to4mm 1.5to4mm

7

Needle

gauge

-2mm 32,4.Bmm

8

Overedaina

width

3.2

1

4,

4.8,

5.6

mm

3.2.4nm

3.2,

4,

4.8,

6.4

mm

9

Differential

feed

ratio

Gathering

1:2

(Max.

1:

4),

Stretching

1:

0.7

(Max.1

:

0.6)

10

Needle

bar

stroke

24.5mm

11

Needle

tilt

angle

20·

12

Needle

ORGAN

DC

X

27

(Standard)

(DC

X 1

can

be

used

as

well.)

13

Presser

lifting

amount

7.0mm 6.5mm 5.5mm

14

Presser

foot

pressure

49N

(5Kg)

15

Stitch

adjusting

method

By

pushbutton

16

Upper

knife

Rat

knife

17

Vertica!

amount

of

top

feed

dog

3.5to8.5mm

18

Lonaitudnal

amount

of

top

feed

dog 1

to

7.5

mm

(deoending

on

the

~ifications

of

the

respective

machines)

19

Top

feed

adjusting

type

By

lever

20

Differential

feed

adjustment

By

lever

with

micro

adjustment

mechanism

21

Weight 29kg

22

Lubrication

Gear-~,pe

automatic

lubrication

23

Lubricating

oil

*

JUKJ

MACHINE

OIL

18

(Equivalent

to

ISO

VG

18)

24

Needle

cooler

Provided

as

standard

(Exduding

some

of

subclass

machines)

25

Needle

thread

heat

remover

Provided

as

standard

(Excluding

some

of

subclass

machines)

26

Micro

presser

lifting

device

Provided

as

standard

27

Motor

2P

55DW

(In

case

of

not

less

than

7,0CYJ

rpm)

2P

400W

(In

case

of

lessthan

7,000

rpm)

• JUKI MACHINE OIL

18

(Equivalent to ISO

VG

18)

Part No. : MML018900CA (900 m f )

-4-

From the Library of Superior Sewing Machine & Supply LLC

(5) MO-6900J SERIES

No.

Item

.

Specifications

1

Model

M0-6904J M0-6914J M0-6916J

2 Feedtype

Vertical

amount

of

top

feed

dog

3

Description

1-needle

Orerlock

2-needle

Overlock

2-needle

Safety

stitch

machine machine

machine

4

Stitch

type

F.

S.

T.

JIS

E13

JISE24

JIS

E13+ 012

(USA

standard:

504)

(USA

standard:

514)

(USA

standard

:

516}

5

Sewing

speed

6,000rpm

6

Stitch

length 2.5to5mm 2.5to4mm 2.5to5mm

7

Needle

gauge

-2.6mm 4.8mm

8

Overedging

width

4.8mm 6.4mm 4.8,6.4mm

9

Differential

feed

ratio

Gathering

1:

1.75

(Max.1

:

3.8)

Gathering

1:2

(Max.1

:

3.8)

Gathering

1:

1.75

(Max.1:

3.8)

Stretching

1:

0.6

Stretching

1:

0.7

(Max.1

:

0.6)

Stretching

1:

0.6

10

Needle

bar

stroke

28.8mm

11

Needle

tilt

angle

20·

12

Needle

ORGAN

DOX5

13

Presser

lifting

amount

Max.8mm

14

Presser

foot

pressure

49N

(5Kg)

15

Stitch

acfJUsting

method

By

pushbutton

16

Upper

knife

Square

knife

17

Vertical

amount

of

top

feed

doa

3.5to8.5mm

18

Longitudinal

amount

of

top

feed

dog

2.7

to

7.0

mm

(depending

on

the

specifications

of

the

respective

machines)

19

Top

feed

adjusting

type

By

lever

20

Differential

feed

adjustment

By

lever

with

micro

adjustment

mechanism

21

Weight

29kg

22

Lubrication

Gear-type

automatic

lubrication

23

Lubricating

oil

*

JUKI

MACHINE

OIL

18

(Equivalent

to

ISO

VG

18}

24

Needle

cooler

Provided

as

standard

(Exduding

some

of

subclass

machines)

25

Needle

thread

heat

remover

Provided

as

standard

(Excluding

some

of

subclass

machines)

26

Micro

presser

lifting

device

Provided

as

standard

27

Motor

2P400W

* JUKI MACHINE OIL

18

(Equivalent

to

ISO

VG

18)

Part No. : MML018900CA (900 m £)

-5-

I

I!

l,

I,

11

I

i

ii

11

.I

l

From the Library of Superior Sewing Machine & Supply LLC

~'.

!j

i

I

2.

MODEL

NUMBERING

SYSTEM

I MO-6000 SERIES MODEL NUMBERING SYSTEM

~I

11

1

1 2 3 4 5 6 7 8 9 10

11

12 1314 15 16 17 18 19 20

21

22

M06666DDD6666/D666-DO6

II

I 4

Machine

code

5.

6

Seam

code 8

Needle

gauge

code

ll

I 7 ·6700 series 0 1-needle

03

Splicing

~

I

11

·I

*

11

ri!

*

,I

i

9 6900 series

7

Basic

specification

code

s

Standard

G

Extra

heavy-weight

materials

A

Variable

top

feed

type

J

Variable

top

feed

type

for

B 2.0mm

C 2.4mm,

26

mm

(for

extra-

heavy-weight

materials)

D

32mm

E 4.0mm

F 4.8mm

04

1-needle

3-threa~

overtock

(504)

05

For

blind

hemmong

(505)

12

2-neeclle

4-thread

mock

safety

stitch

(512)

14

2-needle

4-thread

overtock

(514)

16 2-needle

S.thread

safety

stitch

(516)

43

3-needle

6-thread

safety

stitch

45

2-needle

double

chainstitch

I

extra

heavy-weight

materials

* 6900only 1 4.8mm+2.0

mm

11:

11

I 9

Overedging

width

code

A

1.6mm

D 3.2mm

E

4.0mm

1O

Feed

dogcode

4 2-row

5

1-row

6 3-row

11

Material

code

Classification

based

on

materials

to be used

1

Extra

light-weight

to

light- Forlight-weight materials

such

as

weight

materials

shirts

or

the

Uke

F 4.8mm 7 4-row 2 Light-weight

to

medium-

Knit

wear

only

-----

H 6.4mm 3

weight

materials

General

fabrics

M 10.0mm 4

Medium-weight

to

heavy-

Knit wear

only

such

as

sweater or

N 18.0mm

weight

materials

the

fike

-5 Medium·weight to heavy-weight

materials

such

as

denim

or

the

like

------

6 For

heavy-weight

materials

7 Heavy-weight to extra

Heavy-weight

materials

for

jeans,

car

heavy-weight

materials

mattress,

etc.

12

Application

code

Classification

based

on

type

of

operation

and

process

0

Standard

1

For

blind

stitching

2

Forgathering

4

Forattaching

tape

5

For

binding

6

For

binding

tape

D Splicing•

E Car mattress

F

Soft

chain

•

In

case

of

the

splicing,

13th

figure

is

(1).

-6-

From the Library of Superior Sewing Machine & Supply LLC

JUKI MO-6000G Series Quick start guide

Popular Sewing Machine manuals by other brands