Seiko JW-8BL, JW-30, JW-28BL-20, JW-28BL-30 User Manual

OPERATING

INSTRUCTIONS

FOR

JW-8BL-20

JW-8BL-30

JW-28BL-20

JW-28BL-30

SEIKO

SEWING MACHINE CO., LTD.

TOKYO

JAPAN

OPERATING

This

is a

guidetouseofSEIKO

duty

materials sewing machine

mechanism,

Please read

under

this

INSTRUCTIONS

the

guide

Specifications

MAX. SPEED (s.p.m.)

MAX.

STITCH

MAX.

LIFTOFFOOT

NEEDLE

BOBBIN WORKING BED

DIMENSION

POWER

MOTOR

(mm)

SIZE

(mm)

SPACE

REQUIRED

PULLEY

(mm)

(W)

DIA.(mm)

NET/GROSS WEIGHTSM^

MAX.

SPEED

MAX.

STITCH

MAX.

LIFTOFFOOT

NEEDLE

BOBBIN

WORKING

BED

DIMENSION

POWER

MOTOR

NET/GROSS

NEEDLE

(s.p.m.)

(mm)

SIZE

(mm)

SPACE

REQUIRED

PULLEY

WEIGHTS

SPACING

(mm)

(W)

DIA.(mm)

JW series

with

compound

best

condition.

thoroughlysothat

JW-8BL-20 JW-8BL-30

(mm)

DY X3 (sandard No. 24) •

508X153

846X230

JW-28BL-20 JW-28BL-30

(mm)

DY X 3

508X153

846X230

M^

3/16"

(4.7

mm),

SEIKO

model

JW

SERIES

long-arm high

speed

feed and walking

you

may

expect

SINGLE

1,600

NEEDLE

10

20

good

performance.

SY5213.794

37?>x 13

762X153

1,100x230

400W,2P

7Oi'^/

6O0 (50/60HZ)

109/kgs. 151/kgs. 0.377/M3

TWIN

NEEDLE

1,500

10

20

(sandard

60^/509*

112/kgs.

2-3/8"

No.

24)•SY5213•794

37^.x

13

400W,

2P

(50/60HZ)

154/kgs.

(60

mm).

Standard

762X153

1,100x230

0.377/M3

1/4"(6.4mm)

MODEL

for

foot

feeding

heavy-

CODE

EXPLANATION

J :

Jumbo

W :

B :

L :

USE

Tent,

Plate,

Horizontal

Reverse

Large

Hook&Bobbin

FOR

Sail

Clodi,

Leather,

(Super

Hook

Stitch

etc.

Long

Arm)

Rubberized

8 : Single-Needle 20:

508

mm

28:

Twin-Needle

30:

762

mm

Fabrics, Heavy

with

(20

inch)

with

(30

inch) Working

Synthetic,

Compound

Working

Compound

Heavy

Upholstery

Space

Feed

& Walking

Materials,

Foot

Fiber

—

INDEX

CONTENTS

Page

Setting up Caution before starting

the

machine 2

the

operation

Oiling 2 —3

Needle

Thread

Winding

Removing

Threading

Regulating

Adjustmentofthe

Reverse stitching 6

the

lower

threadonthe

and

inserting

the

needle 5

the

thread

the

tensions 5

stitch

pressure 6

bobbin

1

2

3 4

4 4

6

INSTRUCTIONS

Relative

and

positionofvibrating

the

needle

Adjustmentofthe Timing between Adjustment

the

of bobbin case

Adjustmentofthe

Timingofthe

Adjustmentofthe

Replacementofthe

To

re-engage

vibrating

the

Adjustmentofthe

Treadle

assembly

FOR

ADJUSTMENT

holeofthe

heightofthe

hook

heightofthe

and

clearance

thread

safety

controller

connection

clutch

built-in

oiling

for

complete

and

lifting presser bar, also,ofthe

feeder

needle

feed dog 7

and

the

needle 8

opener

presser

lifting presser

for

the

belt

bobbin

the

hook

set

feet

vibrating

spring

and

lifting presser

feet

winder

saddle 14

11-

7

9

10 10

11

12 13

14

15

SETTINGUPTHE

Setting

bolts

(A)

up

under

the

MACHINE

machine on

the

bed.

(Fig.1)

the

table

after

removed

two

pieces of

supporting

CAUTION

1. Do

not

has

been

During

2.

The

machine

(The

auxiliary

3. Do

OILING

not

operation. ting

speed

casebycase.

(Figs.2,3,4&5)

1. Oil

shouldbeappliedateachofthe

4&5.

BEFORE

operate

properly

practice

opearate

To

aretobe

STARTING

the

oiledatevery

period

pulley

hand

turns

wheel

the

take

THE

OPERATION

machine,

the

even if

spot

new

machine

towardtothe

only

and

turnstoclockwise.)

machineatmaximum

practice

changedtoproper

operation

condition

place

for

testing

reservoir shouldbeoiled operator.

andoridling, unless it

required

speedof1,500

at

speed

of

1,000

suitable

designatedbyarrows

lubrication.

more

s.p.m.,

for

the

frequency.

for

starting

but

materials

in Fig. 2,

opera

in

3,

2.

To

fill

the

oil

oil gauge (Fig. 6 A)

reference Whenincontinuous

3.

lineofthe

/ ;ji« H

I.--

for

reservoir

and

of

pour

oil gauge (Fig. 6-1 B).

use, it

shouldbeoiledatleast

hook

the

I,.

Ilf

saddle

oil until

Ik/

from

the

hole

after

taken

out

the

oil level reachedtothe

upper

twiceaday.

NEEDLE

1.

2. To insert

(Figs.7 & 8)

SEIKO

(standard

The

type

needle

JW

series

machines

No.

24)•SY5213•794.

size of needle to be used should be

and

thicknessofthe

the

needle,

bar

movesupto

barasdeeplyasit will go,

(28BL).

Tighten

the

needle

set

IT'

S

"I

'J.

are

sewing

turn

the

its highest

with

screw

setupto

use

determinedbythe

materials.

machine pulley over

point,

the

securely.

put

long

grooveofthe

standard

the

Fig.

6-1

needleofDY x 3

sizeofthread,

toward

needle up

needle

you until

into

faced

the

needle

outside

THREAD

Normally, left twisted

(Fig.9)

thread

side needleoftwin-needle

right

twisted

thread.)

Left

Twist

Is used

for

upper

(needle) thread. (But, for left

288Lmachine.Itcanbefinished

Right

Twist

in fine results

with

WINDING

1. Pass

which

2. Press

matically, The

thread.

REMOVING

1. Draw latch

2. Insert

THE

LOWER

the

thread

setupto

the

lever

In engage

bobbin

X 3

AND

back

the

(2)toa vertical

the

bobbin

hinged latch (2) and

3.

When

closing

through.

THREADONTHE

through

the

shaftofbobbin

(6)toarrow

with

will

automatically

^ o .

INSERTING

side

plate

position,

and

draw

the

side

plate

(1) - (4),

direction,

the

operationofthe

-i

Fig.

10

THE

BOBBIN

(1)onthe

then

pull

thread

the

thread

(1), leave

BOBBIN

and

winder.

be

stopped

bedofthe

remove

out

end

just

wind

then

(Figs.

about

(Figs.

several

(5)

the

machine.

after

12 &13)

and

4—5cm(3),

under

enough

10 &11)

times

bobbin

the

machine,

insert

the

tension

space

winds

bobbin

-

3^-

the

for

arround

the

X A

and

raise

bobbin.

then

push

spring (4).

the

threadtopass

the

thread

is filled

the

down

bobbin

auto

with

hinged

the