Seiko SK-6, SK-6F, SKM-26 Instruction Manual

OPERATING

MODELS

INSTRUCTIONS

S^^-6/W-6F

SKM-26

SEIKO

SEWING

TOKYO,

MACHINE

JAPAN

CO.,

LTD

SPECIFICATIONS

SPEED:

ROTARY BOBBIN:

NEEDLE: NUMBER

THREAD:

FEED

STITCH PRESSER

PRESSER

WORKING

MECHANISM:

HOOK:

OF

NEEDLE

LENGTH

BAR

FOOT:

SPACE:;.v

:

LIFT:

SK-6,

1,200

#32

34.50x15.6

DDxl #

SK-6P

r.p.m.

18-29

: One •/

Synthetic

.

Drop

feed1(SK~6)^

Drop&upper

Maximum

Flat

presser foot i

.

254mmX195mm.:

-vi:-

mm

#5-#

13

J

00

feedv,

mm

800

•

#32S

34.50X15.6

^

DDxl

V

Two

Synthetic

•

Drop

(SK—6P)

Maximum

Flat

roller presser foot

254

SKM-26 \

r.p.m.

• ; /

mm

#18-29 '

#2-#00

'

feed

8 mm

10

presser foot & . :

mm

X195

mm

VV

-

••••

:•

"f^

[

i

• I :

!

..

CONTENTS

Page

Setting Up the machine 2 Speed

of the machine 3

Oiling 4

Needle

Winding bobbins g Inserting and removing the bobbin case and bobbin 7

Threading the machine 8

Preparing for sewing 9

Regulating the thread tension (SK only) 9

Regulating the thread tension (SKM only) 10

Adjusting the presser foot pressure 10

Adjusting the stitch length 10

Bulge guide of sewing material Gauge parts (SKM only) H One or three needle machine (SKM only) 11

Piping or beading

Dummy-joint finish with, knife Two

Adjusting the clearance between

Timing Adjusting Adjusting Adjusting

Adjusting the feed bar hinged stud 14

Timing

Adjusting

Adjusting the thread controller spring 16

and

thread

(SKM

work

(SKM

roller presser feet (SKM only) 11

only) 11

(SKM

needle

between

the the the

between

the

hook and needle 12 height of hook height

needle

lift

of

the

retainer

of

the

and

presser

heightofthe

needle bracket feeder 14

feeder

foot

presser

only) 10

only) 11

and hook (SK only) 12

bar

and

upper

foot

feeder

(SKM,

(SK-6P

SK—6

only)

5^

; 13

14

15

16

g

Model

SK—6P

- 1 —

ase

and

ma

ig material.

Fig. 2 To Install the

Fig. 3 &

4'

To assemble the pedal

machine

A

on the table

ti.'v30''~40

ii'

s.

Fig. 5 The

proper

angle of the

pedal

i

Fig. 6 To ossemble the knee lifter (SKM-26 only)

SPEED

The

800

OF

maximum

stitches

THE

per

MACHINE

speed

minute.

for

machines

Machines

of class

should be

SK

run

is 1,200

slower

stitches

than

and

the

SKM-26

maximum

speed, until the parts which are in movable contact have become galzed by

their

action upon each

other.

OILING

-

Do

not

operate

properly oiled at every spot requiring lubrication.

The arrows on the

Oiling

operation

must

to

assure

the

figures

be

doneatleast

free

machine,

7, 8, 9, 10 and

running

evenifonly

twice

and

daily

durability

11

when

for

testing,

indicate

the

of the

unlessithas

these

spots.

machineisin

operating

parts.

ir I

i

rV....

mESp

been

continuous

lol

n

®!5

Fig. 11

NEEDLE

The

needle eye, determines

To

bar rise to its highest point, loosen

(SK Fig. 12, SKM-26 Fig.

machine is set up to

thickness of the sewing thread, which must pass freely through the

insert the needle, turn the machine pulley toward you, until

use^DDxl

the

size of the needle.

13)

in size ranging from 18 to 29.

the

needle set screw (2) and put the needle

needle

up into the needle bar as far as it will go, with the long groove of the needle

toward the left (SK), or toward you (SKM).

screw

securely.

Then,

tighten the needle set

THREAD

twist

needle,

/ \ ^

J

F'g*

The

bobbin can be wound with either left or right twist thread.

\^

of

thread

fingersofyour

counterclockwise.

If it will twist tighter, it has a left twist.

If it unravels, it has a right twist.

to test for twist, hold a length

between

hands.

threadisto

thumbs

Turn

be

and

the

used

index

thread

for

WINDING BOBBINS (Figs. 2 and 15)

The

bobbin winder is mounted on the table top with its pulley (5, Fig. 2)

in front of the driving belt so that the

pulley

will separate from the belt after

the bobbin has been wound with suflicieiit thread, push the bobbin on the

bobbin spindle (3 Fig. 15) as far as it will go.

Pass the thread from the thread stand downward through the eye (1, Fig. 15)

in

the

tension

Then,

the

thread

tion several times around the bobbin. Push bobbin winder lever (4, Fig. 15)

downward until the wheel (5) contacts the drive belt and

After

the bobbin is filled with thread, release will cause the wheel to disen

bracket.

between

forward

and

around the back of the tension discs (2

toward

the

bobbin

and

wind

from

Fig.

15) hring

belowinclockwise

start

the machine.

direc

gage from the belt and winding will stop. Cut the thread and remove the

bobbin from the winder spindle.

The

adjusting screw (A, Fig. 15) can be turned in or out to increase or

decrease

If

the

amount

the

thread does not wind evenly on bobbins, loosen

of

the

thread

wound

on

the

bobbin.

the

screw (B, Fig. 15)

and move the bracket to the right or left as may berequired and tighten the screw.

Fig. 15

— 6 —

INSERTING

AND

REMOVING

THE

BOBBIN

CASE

AND

BOBBIN

Turn

Push the

bobbin case (2,

Pull up the latch (1, Fig. 17) and lift

To

the balance wheel until the needle is above the needle plate.

retainer

insert a full bobbin, raise

(1, Fig. 16) to

Fig.

16).

the

left

latch

like the figure 16, and remove the

the

bobbin from the bobbin case.

in center of the bobbin case, and

place the bobbin on the center post of the bobbin case.

Be sure Pull the thread into the

that

the

thread

draws

cut

(4,

out

Fig.

from

18) in

tho

bobbin from left to

the

edge of

right.

the

bobbin case, and

from you under the tension spring (5, Fig. 18). Then, pass its end from

back through the hole (6, Fig. 18) in

the

bobbin case.

Finally, push down the latch to retain the bobbin in position.

the

Fig. 20

• 1

THREADING

(SK

only)

B 1

\vWk

1

JB

j

-^5

HBj

;

six

«•

^

B

S'i

B '

Vyy'SE-

-^B

Bi

"Jspi '

^PiSwwBfWMiiii.i

Fig.

21

Fig.

21

right through the eye of the needle, leaving an end of the thread about 10cm long.

,

J(

^8

^1^3

||

,2 discs (4), over

I

JiS^\

r^[i

\g

*

5 n

j.

,1

'KB

Raise

and

above

down

tween

spring

ulator

from right to left through the hole in

the

the thread guide (9), through

bar thread guide (10), then from left to

THREADING

(SKM

Raise

above

and

der

through

left

lever (8),

the

into

the

bet^veen

from

the

(5),

(6),

take

only)

the

between

from

the

slack

the

through

THE

MACHINE

needle

the

thread

the

tension

under

up

lever

needle

right

thread

guard

the

down

bar

to

thread into the hole (1)

guide

(2)

the

retaining

right,

the

through

THE

the

to left

under

disc

(4),

slack

the

(8),

down

MACHINE

bar

to

retaining

around

the

spring (5), un-

regulator

(7),

from

holeinthe

through

its

highest

and

from

discs

(3),

and

be-

over

the

thread

guard

its

the

reg-

(7),

through

the

needle

highest

discs

(3),

the

ten-

(6),

up

right

take

to

up

thread

Fig.

22

you, leaving the end of the thread about 10 cm long.

through then through

the

needle clamp hole (11),

the

eye of

the

needle

PREPARING

FOR

SEWING

With

of

slack

Turn

until

the

left

hand

hold

the

needle thread, leaving it quite

from

the

end

to

the

the hand pulley toward you

the

needle

moves

down

the

needle.

and

end

up

again to its highest position, thus

catching the under thread.

Then,

pull the end of the needle

thread you are holding, then the

bobbin tliread will be

brought

up

with it through the needle hole in

the

needle plate.

TENSION

OF

THE

BOBBIN THREAD (Fig. 18)

If it is necessary to

the

tension

on

the

alter

bobbin

thread, slightly turn the screw

(7) to

or

to

the

turn

decrease

the

right

screw

it.

to increase it

to

the

left

mf

Fig. 23

~ Perfect stitching.

- Tight tension of needle

Loose

tension

Fig. 24

of

needle

thread.

REGULATING

THE

THREAD

TENSIONS (SK only)

For ordinary stitching, the tension of the

upper and lower threads should be equal so

that

both

If

the

tension on

threads

areinthe

either

centerofthe

thread

is

goods.

stronger

than on the other, imperfect stitching will

be

the

result.

A

correct

stitch

can

be usually

obtained

by adjusting the tension on the needle thread.

To

increase the tension,

nut

(1) to

it

to

If discs the

tension of

the,thumb the

pressure against

the

right,

the

left.

the

thread is found to slip in the tension

without

turning

the

retaining discs by

nut (3) to the right and decrease

the

ing slightly the thumb

or to decrease

them,

turn

the thumb

it,

turn

slightly increase

turning

tension discs by turn

nut

(1) to the left.

— 9 —

Fig. 25

Fig. 26

7*

REGULATING

TENSION

The

(SKM

thread tensions of upper thread

THE

only)

THREAD

(a) and lower thread (b) should be

equal

k

1.

Correct

tension

2. Tight tension of needle thread

3. Tight tension of bobbin thread

ADJUSTING THE TENSION OF THE

UPPER

The

THREAD

serrated nut (6) controls the tension of two

upper threads. To increase the tension, turn the

nut to right, or to left to decrease it.

ADJUSTING

LOWER

See

Fig.

27

ADJUSTING THE

The

pressure of

To

increase the pressure, turn it to the right and to the left to decrease the pressure.

ADJUSTING THE STITCH

Turn

regulating

Continue

the

balance wheel toward you, at

lever

the

PRESSER

the

presser foot is regulated by the screw (1).

(2)

until

pressure on

LENGTH

it snaps

the

lever and

the

FOOT

into

THE

THREAD

instructions

PRESSURE

(Fig. 7)

the

same time pressing on

the

feed

driving

turn

the

TENSION OF

for

SK

(Fig. 7)

mechanism.

balance wheel

THE

machines.

either

the

to or

feed

from

you until the travel of the feed is such as to give the required length of stitch.

BBmmm

^^^81

11,111

|||i||||iii|||i||ii^

IS

'

^

V;

the

bulge

SEWING

Normally,

comes

plate.

screw

ward

varied according to the sewing

purpose.

to

To

adjust this, loosen (2)

the

The

shape of

GUIDE

OF

MATERIAL

the

and

arrow

edge of

center

move

the

of

the

direction.

the

guide

the

guide

needle

the

can

(1)

set

to

be

—

10

—

GAUGE

PARTS

(SKM

only)

There are three kinds of gauge parts (needle clamps) as 3.5 mm 4.8 mm and

7.5 mm, according to your purpore, replace it to the required size.

ONE

moccasin stitch and the other needle makes decorative coarse stitching.

clamp, needle plate,

OR

THREE

One needle machine is used for decorative coarse

On three needle machine, either

Three

These stitcliings can be made by replacing

needle

NEEDLE

machine

and

MACHINE (SKM only)

the

can also be used

feeder.

PIPING

A piping work requires a special needle plate

having

out

for

OR

a hole

the

right

only

the

BEADING

through

work.

or

the

straight

left side (two needles) make

decorative

respective presser foot, needle

which a coad is comming

stitching.

WORK

coarse

(SKM only)

stitching.

Fig. 31

DUMMY-JOINT

A

knife

pers.

fitted on the presser foot makes dummj'-joint finish on

For

this work, knife and special presser foot with groove are required.

: I

t!

FINISH

WITH

allow

KNIFE

roller

the

(SKM only)

the

shoe up

PRESSERS

roller pressers employing ball bearings

curve

stitching

(SKM

successfully.

only)

ADJUSTING

After

position so

mm, eye.

I

|||,„

adjusting

that

when

Then,

THE CLEARANCE BETWEEN NEEDLE

the

center

the

clearance

the

hook point comes to 3.5 mm

tighten

three

of the needle to

between

screws (2).

III

I

the

needle

from

'Pq loosen the screw (4), at first

remove

ratchet (1,

mil

Fig.

33

AND

hook point, adjust the liook

and

hook

the

upper end of the needle

bushing

bottom

the

of

bobbin

Fig.

HOOK

(SK

only)

becomes 0.1 to

(3)tofit

the

hook

39).

like

case

snugly

retainer

0.2

the

THE

TIMING

BETWEEN

HOOK AND

NEEDLE

(SK

only)

Loosen the hook set screws (2, Fig. 33), turn the hand pulley toward you

until

the

1-

THE

.

Loosen

- from its lowest point.

—

-—

I

^ L

3.8mm

T

C—shaft

Fig.

34

TIMING

BETWEEN

HOOK

the hook set screws, turn the

needle

The

dimension

lines (1) and (2) is 3.8

standard.

Bring

tbe

by

screws

Be

tween

the hook point (2,

center

moving

(2,

Fig.

sure

that

the

surface of

bushing

move

smoothly.

AND

NEEDLE

balance

wheel

bar

raises

between

mm,

of

the

needle

the

hook

and

33).

thereisno

the

and

the

hook

(SKM

only)

toward you until the

to

3.8

the

two

use it as a

Fig.

(1,

Fig.

tighten

clearance

hook driving

but

needle bar raises to 3.8 mm from its lowest position.

Bring

(3),

the needle and hook point

the

hook

point

then tighten the

(1, Fig.

hOok

36)

screws,

0.1mm

to the center

at the

to 0.2 mm.

same

between

time,

set the

two

needles

clearance

(2)

between

mm

basic

35) to

35)

three

be

they

and

—

12

—

ADJUSTING THE HEIGHT OF THE

This

should be made

determined.

needle to the hook point (refer to Fig. 35).

Turn

after

the

balance wheel

the

timing

Loosen

2

] /

asmrn-j-

^ Then, tighten the screws.

'

/"•

/

||

\ .

\I|;3.8mm

I \

\ 1 Fig.

\ • y

N.

•'

Fig.

35

eye

comestodown

When

adjust

to

fit

34)

turn

the

the hook point comes to the center of the needle or not when the bottom of the needle bar bush-

ing

fits

NEEDLE

between the needle

toward

two

down

the

needle

the

bottomofthe

and the

hand

to the

BAR

(SK only)

and

hoolc has been

you so as to fit

screws (1, Fig. 37), adjust the needle

so that the

3.5

mm

needle

barisat

bar

bushing

,needle

basic

line

pulley

basic

toward

line

(2,

the

upper

endof the

from

its

up

(1, Fig.

you,

Fig.

center

the

hook

lowest

and

downsoas

bar

bushing

34).

confirm

24).

of the

needle

point,

position,

(3,

Further,

whether

Fig. 37

after

the timing between the

determined.

needle to

the

hook point.

.38),

adjust the needle

Fig. 38

Ftg.

36

ADJUSTING THE HEIGHT OF THE NEEDLE BAR (SKM only)

This

should be made

needle

the

bar up or down so that the upper end of the

eye comes to 3.5 mm down from the hook point, at the same time, the two needles must be parallel.

Then,

and

hook

has

been

Turn

Loosen the screws (1, Fig.

the balance wheel toward you so as to fit

center

of

the

left

tighten the screw (1, Fig. 38).

—

13

needle

ASSEMBLING

THE

Fig.

HOOK

39

RETAINER

BRACKET

This

must be done

the

clearance

hook.

Let

the retaining

sufficiently, but not to bend,

hook (3) without tighten

Excess

makes

unnecessary

between

the

screw (4) securely.

contact

after

the

spring

any

clearance, theri

between

wear

and

adjusting

needle

(2) contact

with

the

noise.

and

the

two

ADJUSTING

Adjust

the

feed dog to its highest position.

Fig.

ADIUSTING

the

40

THE

feed

THE

HEIGHT

motion

FEED

OF

THE

FEEDER

to

the

maximum

and

turn

the

balance

^Loose^

Fig. 41

BAR

HINGED

When

is not parallel with the surface of

loosen

get

the

its parallel, then tighten

STUD

feed dog is at its highest position, if it

stud

screws (1)

and

the

wheel

the^

the

turn

the

screws.

to

raise

screws

needle plate,

stud

(2) to

Fig.

42

14

—

TIMING

The correct timing is as follows:

Adjust

ward

of

the

reaches to the needle plate.

To

five

centric adjusting

V U-, M» y

VJ"

you,

feeder

adjust

oil

v.

BETWEEN

the

feeding

after

become

this,

the

feed

NEEDLE

motiontothe

the

feed

equal

pull

open

eccentric

flange

dog

has

height to the

the

adjusting

(4) for the adjustment.

AND

finished

top

FEEDER

maximum

its

surface

cover

flange

(1),

coupling

and

turn

feeding

of the

loosen

(2)

the

motion

needle

three

and

move

balance

and

plate,

screws

the

wheel

when

the

(3)

feed

to

teeth

needle

out

ec

of

Fig. 43

ADJUSTING

The

adjustmentofthe

forth travel is made so that the teeth of the feeder rise to the highest point

at the

feed lifting

driving

any clearance axialy.

ADJUSTING

UPPER

the presser foot and upper feed dog.

of

the

(3), then tighten the screw (2).

middle

Loosen

To

make

direction

Be

suretotighten

The thickness of the material sewn should control the height of the lift of

It

should

Push

the

presser

upper

two

cam

its

FEED

normally

presser

surface

THE

position,

screws

(6).

up

and

UP

AND

when

(5)

down

DOWN

up

and

feeding

and

adjustitagainst

travel

andtomakeitslower,

THE

DOG

foot

bar

of

screw

LIFT

be

(3)

the

OF

just

lifter

to

needle

pushing

THE

high

(i)'up,

the

needle

TRAVEL

down

plate

travelofthe

travelisthe largest.

faster,

the

PRESSER

enough

loosen

turn

screw

and

(4)

turn

the

against

FOOT AND

for

clearance

the

adjust

and

the

cam

screw

the

Fig. 44

OF

THE

FEEDER

(SK-6F,.SKM

feeder

main

the

bottom

against

shaft

by

feed

lifting

toward

the

measure13mm

opposite

rod

(7)

of the material.

(2),

fit

the

of

the

only)

its

back

and

moving

cam

the

toward

direction.

nottomake

needle

presser

hole

between

foot

—

15

-

Fig.

S M

m

45

.h

Lower

lift to be always equal height by lossing

(6) and moving the upper feeder (5) up and down,

when

When

move crank

raise

knock pin.

Then

justed according to

the

presser

turning

the driving

the

raising

position of the lifting presser .bar bell

position of

lift

bar

balance wheel.

the

lift of the upper feed dog,

cam

shaft

the

of

the

presser foot (3)

the

lifter

and

so adjust

(7)

and

the bell

presser foot (5) by

lift of

the

upper feeder (5).

the

crank

must

the

be ad

both

screw

(8)

the

ADJUSTING

I'-

•

h• I

I

Fig.

ADJUSTING

(SK,

Fig.

25,

THE

46

THE

SKM

HEIGHT

Raise the presser bar lifter (1) and so adjust the

I

gCSr

fMYfpresser

THREAD

Fig. 27)

between

^

OF

THE

PRESSER

the

bottom

adjust

this,

presser

bar

(5)

upordown,

CONTROLLER

FOOT

of

the

loosen

the

foottothe

SPRING

(SKM,

presser

screw

foot

(4),

fit

SK-6

(SKM-26)

(2)

the

needlebymoving

then

tighten

the

only)

and

the

needle

the_

screw.

Normally, the thread controller spring (4) should hold slack of the .upper

thread until the needle reaches to the goods, and it should pause.

To

adjust this, loosen the screw (5) and adjust it by turning the thread take

up

spring

To

screw stud (7) with a screw driver and turn the serrated nut to the right, to

lighten the tension, turn to the left. Then, tighten the tension screw stud.

regulator

strengthen the tension of the controller spring, loosen slightly the tension

(6).

—

16

—

y!

•.

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