Seiko TH-2B Manuale utente

Operating

Instructiona

*********

• *

* T H - 2 B

* *

* T H - 6 B *

* • *

* T H - 7 B *

* *

* T H - 8 B *

*************

SEIKO

SEWING.

MACHINE

CO.

From the library of: Superior Sewing Machine & Supply LLC

Contents

Lubrication

Setting

the

needle

Thre

ad 2

Removal

and

insertion

of bobbin ' 3

5Winding

the

bobbin

thread

6 Needle

threading

7Tension

bobbin

thread

and

needle

thread

8Pressure of

presser

foot

9Adjustment of

stitch

length

Determination

positioning

for

stitch

length

forward

and backward amount 7

Timing

thread

tension

releasing

mechanism

..i.......

12 Removal

shuttle

hook 9

Adjusting

the

each

points

(A)

Adjusting

needle

position

against

needle

hole

feed

dog. (7B &

Types) 9

(B) Adjusting the

height

of feed dog 10

for

timing

feed

dog-rise

(D)

Adjusting the forward and backward

position

needle

bar

frame

(E) Timing of

needle

and hook

Positioning

between the

upper

side

needle

eye. 11

Adjusting

the

height

needle

bar

®Adjusting the

position

of the

tip

hook

® Adjusting the clearance

between

needle

and

the

tip

hook

Determination

the

position

needle

bar

rock

frame

for

7B & 8B

®Each

timing

for

up/down moving amount

presser

foot

(2B &

only)

From the library of: Superior Sewing Machine & Supply LLC

Specification

for

Model

Types

Max.

Sewing

speed:

Needle:

Feed

mechanism:

Presser

lift:

Needle

bar

stroke:

Bed

size:

Working

space:

Use:

800

(s.p.m.)

Sewing

speed

may

changed

the

models

and

applications.

BY X 1

(forTH-2B)

(8B)

Alternating

pressers

(7B)

Flat

presser;

(6B)

Roller

flat

presser

(2B)

Alternating

pressers

20mm

(10mm

lever)

56™"

253inm

656mm

180mm

400mm

Suitable

for

sewing

extra

heavy

materials

such

shoeSf

bagSt

leathert

sproting

goods

and

thick

fabrics*

From the library of: Superior Sewing Machine & Supply LLC

Lubrication

all

points

indicated

arrows

figures.

- 1 -

From the library of: Superior Sewing Machine & Supply LLC

Setting

the

needle

Tii-rn

+hP

balance wheel over tov/ard you

until

the needle

"bar

ita

hisLst

Mint.

Loosen

the

needle

clamp

sorew(l).

Sold

Ind

insert

the

Ledle(2)

into

the

needle

bar

hoi®

deeply

will

go,

keeping

the

long

groove

of the

needle

the

left

and

tighten

the

set

sorew(l)

securely.

Thread

The

needle

thread

should be

used

the

left—twisted

thread

only»

the

bobbin

thread

can be

used

either

left

right

twisted

find

out

thread

twist,

hold the

thread

shown

illust

ration,

and turn the thread over toward

you

between the

thumb

and

forefinger

right

hand,

and

then

left-twisted

thread

will

wind

tighter

strands,

and

right-twisted

thread

will

unwind.

- 2 -

From the library of: Superior Sewing Machine & Supply LLC

Removal

and

insertion

bobbin

ORemoval

bobbin

Open

the

bed

slide,

then observe the

hook

position (as

shown

figure)

and

drop-do^

the needle

bar

lowest

point,

then

apring(l)

and

bobbin

caseu)

and

depress

the

snap

spring

and

pull

the

bobbin

case

outward and

take

the

bobbin

out

of the bobbin

case.

•

- 3 -

From the library of: Superior Sewing Machine & Supply LLC

OInsertion

bobbin

Put

the

bobbin(4)

into

the

bobbin

easel5)

while

holding

down

the

thread

and

pass

the

thread

through

underneath

the

bobbin

case

spring!6;

lead

out

from

the

bobbin

case

slit(7).

5Winding

the

bobbin

thread

Pass the thread in the order numerically

instructed

figures.

(1)

Spool

pin—^(2)

Thread

guide

(am)-^(3)

Needle

teneion thread guide

»-the

clearance between

two

tension discs

»-(4)

Meedle

thread tension

thr^d

guide—?-(5)

Bobbin

(winding several timesj ^

(6)

Move

the

bobbin winding

lever#

un-\U

Winding

length

should

adjusted^by

the

screw(7)

and

left

rightward

positioning of the lever(6).

- 4 -

From the library of: Superior Sewing Machine & Supply LLC

Needle

threading

Pass

the

thread

the

order

numerically

instructed

the

figures.

Spool

pin—^(2)

Thread

guide

thread

tension

(3) Clearance between two

tension

discs

^(4)

Thread

guide of thread tension ^(5) Thread

controller

discs

single

turn

>-(6) Thread guide

Tension

spring

^(q)

Thread

take

levIT^^

-I

^7^

Tension

sprffig_~^'(g)

(9) Thread guide on

face

plate

(11)

Needle

-^(10)

Needle clamp

Tension of bobbin

thread

and

needle

thread

Balanced

tension

(A)

When

stitch tension is

well

balanced,

the

bobbin

thread

IS enpged with the needle thread

the center of

given

material

thickness,

shown

fig.

(A)

(B)

Tight

needle

loose

bobbin

thread

tension

(B)

Pig.

(B)

shows

unbalanced

tension, tight

needle

thread or

loose

bobbin

thread.

(C)

Loose

needle or

tight

bobbin

thread

tension

- 5 _

From the library of: Superior Sewing Machine & Supply LLC

Adjusting

needle

thread

tension

turning

the

tension

regulating

nut

clockwiseneedle

thread

tension

increases.

turning

the

tensionregulating

nut

counter-clockwise^^^

needle

thread

tension

decreases.

Adjusting

hoBbin

thread

tension

loosening

set

screw(l)

and

tension

regulating

screw(1).

The

set

screw(l)

should

exactly

tightened

after

the

bobbin

thread

tension

was

adjusted.

turning the tension

regulating

screw

clockwise/^

thread

tension

increases

and

turning

the

tension

regulating

screw

counter—clockwise

thread

tension

decreases.

- 6 -

From the library of: Superior Sewing Machine & Supply LLC

Pressure

presser

foot

Loosen

the

nut,

then

turn

the

pressure

regulating

thumb

screw

clockwise^^pressre

increases

turn the pressure

regulating

thumb screw

counter-clockwise^^>.pressure

decreases,

^ter

adjustment,

tighten

the

nut.

Adjustment

should

be made

accordance

with

the

materials

sewn.

(ill

Adjustment

stitch

length

lever(l),

reverse

stitch

performed,

perfSLld!

regulating

lever{l),

forward

atitlh

knurling nut(2) 4 (3) clockwise/'"^ feed

length

deoreasea,

turning the knurling nut(2) &(3) oounte?-

increases.

The

knurling

nut(2)

ias

determined

®^

®^^®^

desired

stitch

length

}^:

ikO

- A

(Note)

When

upward

&downward movemei

the

feed

regulating

lever

;

loosened,

the

feed

adjusting

screw(4) should be

tightened,

Determination

positioning

for

stitch

length

forward

and

backward

amount

Equivalent

stitch

length

forward

and

backward

can be

obtained

adjustment

of t upward &

downward

position

feed

regulating

set

plate(A)-, and

back-lever(feed

regulat

ing

collar

should be placed

feed regulating

set

plate

(A)

- 7 -

From the library of: Superior Sewing Machine & Supply LLC

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