Brother 082-8792 User manual

INSTRUCTION

MANUAL

FOR

BROTHER

082-8792

SINGLE

NEEDLE

ADJUSTABLE

TOP

AND

BOTTOM

FEED

LOCK STITCH

MACHINE

NAMES

OF

MAIN

PARTS

DB2-

B792

Usc

Sewing speed

Maximum stitch length

Ill

Th

ank you very

mu

ch

for

yo

ur

pur

cha

se

of

a

BROTH

ER sew

in

g

machine

.

The

full pe

rform

ance

of

yo

ur

new

se

wing

ma

chine depends, a b

ove

all,

on

co

rr

ect op

era

ti

on.

Be

sure to

care

fully read

the

fo

ll

owi

ng ins

truct

io

ns before use.

-

003

I - 013 - 015

For medium

ma

te

ri

als Gathering

4500 spm 3500 spm

4

mm

5

mm

Maximum upper

feed

amou

nt

6

mm

8

mm

0 Nee

dl

e

bar

f)

Presser-regulation

thumb

scr

ew

0

Th

r

ead

re

tain

er

0

Pr

e-t

ens

ion

0 Pulley

0 Fee

d-r

everse lever

(

HOW

TO INSTALL THE

MACHINE

Table

Pre

ss

er

fo

ot heig

ht

(Knee lifter)

Feed

dog

height

ccdlc

Usc

ga

u

ge

Shirring dev

ic

e

10

mm

0.8

mm

DB X I

Group A I Group B Group L

--------1

In

cluded

)

* Fit the h

ead

hinges 0 in the table slot, fit it to

the

rubb

er hinge b

as

e

f)

of

the

ta

bl

e,

and

th

en

pl

ace

the head onto the

rubb

er

pad

s 0

at the

four

co

rners.

* When you u

se

m

ode

l DB2- 8792-013,

01

5 (p

eda

l system), please make a hole

for

chain

as

sh

ow

n on the figure

above

.

(

ADJUSTMENT

OF

THE

KNEE

LIFTER

STOPPER

)

* L

oose

n

th

e nut and a

dju

st

the

l

ef

t

kne

e

li

f

ter

sto

pp

e

rO

so

that

th

ere

isa

bout

2mm

cl

ea

rance

be

tw

een the knee lifter 0

and

knee lifter

pusher

bar

f)

.

*

Wh

en

yo

u

pu

sh the knee pad, l

oo

se

n

th

e

nut

and

adjust the

ri

ght

kn

ee

li

fter st

oppe

rO

so

th

at

there

is

about I

mm

cl

eara

nce betw

ee

n

the oil

pan

and

the knee lifter 0 .

- 1-

From the library of: Superior Sewing Machine & Supply LLC

[

HOW

TO

INSTALL THE BELT

COVERS

Stud

(black)

Spring

wash

er

HOW

TO

INSTALL THE BOBBIN

WINDER

)

* Install

the

bobbin

wi

nd

er

0

to

the

tabl

e with

two

screws

f)

.

(Install it

so

that

the

bobbin

wi

nder

pulley 0 will

not

slip.)

I.

Sc

r

ew

the

bl

ack

stud

into

the

back

of

the

machine

head

.

2.

Screw

the

white

st

ud

into

the

machine

h

ead.

3.

Temporarily

tighten

screw

A

and

the s

pr

ing

washer

to

the

white s

tud.

4.

Install belt

cove

r U

with

screw

A

as

shown

in

the

figure

at

the

left.

5.

Install

belt

cover

U with

screw

B

and

the

spr

ing

washer.

•

When

in

sta

lling belt

cover

U, please

bring

down

the

machine.

6. Install belt

cover

D with

sc

rews

and

washers.

•

When

installing belt

cover

D, pl

ease

set up

the

machine.

*

When

re

placing

the

b

elt,

rem

ove belt

cover

U.

(

HOW

TO INSTALL THE SPOOL HOLDER BASE )

• Install the

spool

holder

base 0

at

the

right

corne

r

of

the

table

with screws

f)

.

- 2 -

From the library of: Superior Sewing Machine & Supply LLC

[ LUBRICATION

1. Lubrication

( I) Su

pp

ly oil sl

ow

ly

to

the

mark

at

the left ("

HI

G H").

If the o

il

level falls bel

ow

the

mark

at the right

("LOW")

,

add

oi

l.

(2) If the o

il

becomes

contaminated,

rem

ove

the

oil

cap

0 and

th

e

oi

l

cover

sc

rew G.

(3) Wipe

away

contami

n

at

ion fr

om

the

ma

gnet

f)

.

* Use

th

e oil specified

by

BROT

H

ER:

Hi-White 70.

2. Oiling

* Before using

the

mach

ine,

be

sure to s

up

ply one

or

two

drop

of

o

il

to

the

point

ind

icated by the

arrow

.

ADJUSTMENT

OF OIL SUPPLY

AMOUNT

TO

ARM

SHAFT

AND

ROTATING

HOOK

€1D

More oil

CID

Le

ss

o

il

* Re

mo

ve

the f

ace

pl

ate

,

and

adju

st the lubrication

for

the

arm

sh

aft

by

turning

the

sc

r

ew

0 .

* Lower

the

h

ead

, and

ad

ju

st the lubri

catio

n

for

th

e

rotat

ing

hook

by

turni

ng

th

e

sc

r

ew

G.

ROTATION

DIRECTION

OF

THE

MACHINE

)

* The

correct

rota

tin

g

direct

ion

of

the m

achine

is

co

unterclockwise as viewed

from

the pulley side.

*

Pr

e

ss

th

e belt0 ,

and

adjust

th

e belt

ten

sion by

turn

ing the nut

G so that

the

belt

can

be

pushed

inward

about

15 - 20mm.

* When

the

mach

ine

run

s

id

le, be s

ur

e to r

ai

se

th

e

presser

fo

ot.

- 3 -

From the library of: Superior Sewing Machine & Supply LLC

* Insert the needle 0 all the way, making sure that the long

groove

of

the needle

is

at

the left, and tighten by using the set

screw

8.

J

(I)

Fit the bobbin 0 onto the bobbin winder spindle

8.

(2)

Push the bobbin winder stop latch 8 completely upward.

(3)

After winding the thread around the bobbin 0 a

few

times in

the direction

of

the arrow, operate the machine.

(4)

If

the thread cannot be wound evenly, adjust the bobbin

winder tension bracket8 by moving itto the left

or

rightafter

loosening the set screw

0.

* To wind more thread onthe bobbin

0,

tighten theadjustment

screw

0.

Raise thread take-up

to its highest position

iJif:f>wiliQJ•fB1~Jl\11§)._~fi

m_f.liE:·-~a~o:~JIJ:t:Nc:~~~;

-

.....

_

---~

--"''

-.

- -

-·

·-· ·-·

(I)

Raise the needle above the needle plate.

(2)

After lifting the latch of the bobbin case

0,

remove the

bobbin case.

(3)

The bobbin 8 will come

out

when the latch

is

released.

Delivery eye

(I) Insert the bobbin into the bobbin case.

(2)

Pass the thread through the slot 0 and under the tension

spring

8.

(3)

Pull

out

the thread from the delivery eye

at

one end

of

the

tension spring

8.

J

-4-

From the library of: Superior Sewing Machine & Supply LLC

(

THREAD

TENSION

o-

~

Stitches

when

upper

t

hr

e

ad

tension

is

too

loose

-

Stitches

when

upper

thr

ead

tension

is

t

oo

tight

-

I

deal

s

eam

J

More

tension

* Adjust the screw 0

so

that

the lower thread tension is

just

st

rong

enoug

h

to

prevent the bo

bbin

case

from

falling by its

own

weig

ht

when it is suspend

ed

by holding the

end

of

the lower

thr

ea

d.

*

Adjust

th

e tension

of

the

upper

thread

wi

th

the tension

contro

l

nut

f)

as

sh

own

in the figure

above

after

lowering the

pr

esser foot.

Ill Thread

take-up

spring

*

The

sta

ndard op

era

ting

rang

e

of

the

thread

take-up

spring is 7

~ lOmm.

The

s

tandard

ten

sion

is 25

~

30

grams.

*

To

adju

st the

operat

ing range, loosen

the

scr

ew

f)

and

turn

the

upper

thread

tension assembly.

*

To

adjust

the tension, in

sert

the tip

of

a screwdriver

into

the

sl

ot

of

the

tension stud 0 ,and tu

rn

it

as

necessary.

[

~_A_D_J_U_S_T_M_E_N_T_O

__

F_P_R_E_S_S_E_R

_F_O_O_T

__

PR

__

Es_s_u_R

__

E

__

__________________________

~

)

Nut

(

ADJUSTMENT

OF

UPPER

FEED

PRESSURE

*

Th

e press

ure

on

materials

dur

ing sewing must be

as

weak

as

possible

but

still

enough

to prevent slippage. Adjust,

if

necessary,

by

using the adjust

ment

screw 0 .

* Loosen the

adjustment

nut

before

adjusti

ng.

)

* Adjust the

upper

feed pressure by t

urning

the

adjustmen

t

upp

er

feed dial 0 so

that

the

upp

er

feed

dog

will feed

the

materia

l

fi

rmly

and

securel

y.

If

you

make

the u

pper

feed pressure stronger, the

upp

er

fe

ed

efficiency will be increased.

If

you

make

it weaker,

the

upper

feed efficiency will be

decrea

se

d.

* Be s

ur

e

not

to

make

the

upper

feed press

ur

e

to

o st

rong,

because, if

it

is,

the

upper

feed

dog

wi

ll li

ft

the

presser foot,

causing

th

e material

to

slip.

- 5 -

From the library of: Superior Sewing Machine & Supply LLC

(

ADJUSTMENT

OF FEED

DOG

HEIGHT

]

'----·

----------

0.8mm

!

*

When

the

feed

dog

0 is

at

its highest

position

above

the

needle pl

ate

,

the

standard

height

is

0.8mm.

*

To

ad

ju

st the height

of

the

feed

dog

0 ,

move

it to the highest

position

above

the

needle

plate,

loose

n the set

sc

rew 8 ,

and

raise

or

l

ower

t

he

f

eed

lift

ing

arm

0 .

ADJUSTMENT

OF PRESSER

FOOT

HEIGHT

e

0

6mm

(

ADJUSTMENT

OF STITCH LENGTH

Feed adjustment

_.......

dial assembly

-·

Model

082-

8792-003

*

The

sta

ndard

height of

the

pr

esser

foot

0 is

6mm

when

it is

raised by using

the

knee

li

fter

,

an

d locked by the

presser

foot

s

topper

f)

.

*

Loo

sen

the

nut

0

of

the

adjustment

screw

and

then

the

pre

ss

er

foot

adjustment

scr

ew

e

so

that

no

pressure

will be

app

lied

to

the presser foot.

Loo

se

n

the

set

screw 0 ,

and

adjust

the

presser

foot

heig

ht

by

raisi

ng

or

l

owering

the presser

bar

0 .

Feed adjustment

dial assembly

Model

013

2- 8792-

013.0

15

0

*

Pr

ess

the

reverse l

ever

0

to

the

center

posi

ti

on,

set the

numb

er

on the feed

adjustment

dial which

co

rr

es

pond

s

to

the

desired stitch

leng

th

(I - 4 on

mode

ls 003

and

013,

and

I - 5 on model 015)

to

the"

12

o'clock"

po

si

ti

on,

and then release

the

reverse lever0 .

(When

se

ttin

g

the

reverse l

ever

in

the

cent

er

position,

be

ce

rtain

to

pr

ess it a

ll

the way into position.)

*

The

amo

unt

of

feed be

co

mes

greater

as the

number

becomes l

arger.

The

maxi

mum

stitch length

of

mode

ls 003

and

01

3 is 4 mm, a nd

the

ma

ximum

of

mode

l

01

5 is 5

mm

.

Th

e

maxim

um

stitch leng

th

of

ba

c

ktack

sewing, however, is

approximate

ly 2 mm.

Ill

Reve

rse-operation

mec

hanism

When

the

reverse le

ver

0 is

pr

essed,

the

mat

er

ial will be fed in

the

reverse direction. Wh

en

the

reverse leverisreleased, it will

return

to

its original

po

si

tion

,

and

the

mat

er

ial will

automati

ca

ll

y be fed

in

the

forw

ar

d

direction

.

-6-

From the library of: Superior Sewing Machine & Supply LLC

(~_

A_D_

J

_

U

_

S

_

T

_

M

_

E

_

N

_

T

__

O_F_U_P_P_E_R

__

F_E_

ED

__

A_M

__

O_U_N_T

__________

____________

__________

~)

Upper feed adjustment dial assembly Upper feed stopper dial

Indication pin

Upper feed adjustment dial assembly

\

--

@

Feed

a d

justmen

~

·

dial assembly

~

0

,______,

Model 0 82- 8792-003 Model

08

2-8792

-

013.015

082

-

8792

-

00

3

*

Pr

ess the reverse l

eve

r 0 to

th

e ce

nt

er p

os

ition, and after

se

ttin

g the

de

si

red

nu

mb

er

( I

~

6)

on

the upper feed adjust

men

t dial

assembly to the " 12

o'

clock" p

os

ition, release the r

eve

rse lev

er

O.

*

Th

e u

pp

er feed

amo

unt

b

eco

m

es

l

ar

g

er

as

the

numb

er becomes larg

er.

Ma

ximum feed amo

unt

= 6

mm

082

-

8792

-

013

* Align the nu

mber

6 (on the

upp

er feed stop

pe

r

di

al) wi

th th

e i

ndicati

on

.

Pr

ess the reverse l

ever

0 to the center position,

and

after a

li

gning the

numb

er (I

~

6)

of

the uppe rfeed

adj

ustme

nt

d ial

as

s

em

bly wi

th

the i

ndi

cation

, release the rever

se

lever.

*

Th

e up

per

feed amount b

eco

mes gre

ate

r as the n

umb

er b

eco

mes larger.

08

2

-8792-015

* Align the

num

be

r 8 on the upper-f

eed

stoppe

r dial with

th

e i

nd

i

catio

n pin.

Press the reverse lever 0 to the cent

er

p

os

it

io

n, align the des

ir

ed

num

ber

(

I-

8) of

th

e u

pper

-feed

adju

stme

nt

dia

lwith the in

dica

t

ion

pin, a nd

th

en

re

l

ease

the reverse l

ever

0 .

*

The

amo

unt

of

up

per feed be

comes

grea

t

er

as the nu

mb

er

beco

mes l

arge

r.

[~_

A_D_

J

_

U

_

S

_

T

_

M

_

E

_

N

_

T

__

O_F_S_E_W

__

IN

_G

__

LA

__

G

____

____________________________________

~)

Upper feed adjustme

nt

dial assembly \\ .

(~

Feed adjustme

nt

\

r-

dl

ol

mo

mbly 1

Mo

del

08

2- 8792-003

Fe

ed

ad

justment

dial ass

embt

y

Upper

feed

adjustment

dial assem

bl

y

Model

082

- 8792- 013

.0

15

~

The lower material is long.

~~

Th

e upper material is long.

* If the lower mat

er

ial is l

on

g when s

ew

ing is finished, set the u

ppe

r f

eed

ad

jus

t

men

t d i

al

ass

emb

ly to a sma

ll

er

n

um

ber,o r set the feed

adjustme

nt

dial assembly to a l

arger

num

ber.

* If the

upper

materia

l is l

ong

wh

en

se

wi

ng is

fi

nished, set

th

e u

pper

feed a

dj

ustm

en

t dial asse

mb

ly

to

a

larg

er

n

umbe

r,

or

set

th

e feed

ad

ju

stme

nt

dial assembly

to

a s

ma

ll

er

n

um

ber.

* If the

uppe

r feed

adju

st

ment

dial

is

to be turned, first

tur

n

the

upper feed s

topp

er

dial

to

the

maximum

n

umbe

r, and t

hen

turn

the

u

pp

er feed

adj

u

stment

dial.

*

Turn

t

he

u

pper

feed adjustme

nt

dial

assembly and the feed adjustme

nt

dial

assem

bly

li

ttle by little

to

t

he

pl

ac

e wh

en

there

is

no

sewing

lag.

-

7-

From the library of: Superior Sewing Machine & Supply LLC

(

GATHER

SEW

I

NG

Upper

feed a

djustment

dial

assembly

---

- ·---...

Upper

feed

adjustment

assembly

0

)

Model Model DB2 8792

013.015

* Use

th

e

gather

type

gauge

for

gather

sewing.

* Use gr

oup

B

or

group

L

replacement

pa

rts

for

tuck

sewin

g.

The

tuck

se

parato

r en

su

r

es

beautifu

l tuck sewing.

Gath

er

se

wing

Ill Sew ing me

th

od

I.

Turn

th

e feed

adju

s

tment

dial

to

set

th

e

desired

s

titch

length

.

2.

Set

the

upp

er feed

adjustment

dial

to

a

po

s

ition

in which

the

amoun

t of

upper

feed

is

larger

than

that

of

t

he

lower

feed.

3. B

ecause

the

amount

of

ga

th

ering

differs

acco

rd

ing

to

the

type

of

material

being

u

sed,

the

l

ength

of

th

e stit

ch

and

o

th

er

factors

,

the

approp

r

iate

amount

mu

st be

determined

and

se

t

by u

sing

the

adju

s

tm

e

nt

dial.

©

Partial

gathering

is

po

ssible

with

model

s

082

-8792-013

and

- 015

I.

Set

t

he

feed

adjustment

dia

l

to

the

des

ir

ed s

titc

h le

ngth

.

2.

Set

the

upp

er

feed s

topper

dial

to th

e

maximum

number.

3. Use

th

e

upper

feed

adj

us

tment

dial

to e

limin

ate any s

ewing

lag.

4.

When

the

ga

th

er

sew

in

g

pedal

0 is

depressed.

the

machin

e

will begin

gat

h

er

se

wing

,

When

th

e pe

dal

0

is

releas

ed.

the

mach

ine will

resum

e

normal

se

wing

.

(Use

the

upper-feed

st

opper

dial

to

adjust

the

gat

h

er

to

th

e

desi

r

ed

amount.)

*

When

the

gathe

r-s

ew

ing

pedal

is

depr

essed,

th

e

material

will

be

sewn wi

th th

e

amount

of

feed

set

by the

upp

er feed st

oppe

r

dial.

When

the

peda

l is releas

ed,

the

material

wi

ll

be

sewn

with

th

e

amount

of

f

eed

set

by

the

upper-feed

ad

justment

dial.

INSTALLING

THE

GATHERING-SEPARATOR

[Standard equipment on

082

-

8792-015]

I. Insta

ll

the guide

bar

0

by

using

th

e

screw

f)

and the

wa

sh

er

0 .

0

/

Separator-p

late

(I

nst

a

ll

th

e guide b

ar

0

so

that

it is in

dire

ct

contact

wi

th

e

proj

ecting

part.)

Fig. A

Separator-

pl

ate

2. Fit

th

e se

parator-plat

e

assemb

ly 0

on

to

the

gu

ide

bar.

and

then

temporari

ly

tight

en with

th

e

grip

sc

r

ew

0 .

3.

Adjust

th

e

sew

ing

mar

gin by us

ing

th

e

grip

s

cr

ew

0.

and

th

en ti

ghten

th

e

grip

sc

rew 0 firmly.

* R

efe

r

to

figure A

for

th

e alig

nment

of

the

front

e

nd

of the se

parator-plate.

(Install

th

e separ

ator-p

l

ate

so

that

th

e needle wi

ll

not

co

me

into

con

tact

with

it.)

8 -

From the library of: Superior Sewing Machine & Supply LLC

Model

082-8792-003

Model

082-8792-013,

015

I. Turn the upper feed adjustment dial assembly to set the upper feed amount to maximum.

2.

Turn the machine pulley slowly.

3.

The minimum clearance between the upper feed dogand the presserfoot should beapproximately

1.0

mm when the forward-pulling

type upper feed dog

is

used, and

2.5

mm when the gathering type upper feed dog

is

used.

~

4. Loosen the screw

0.

and

adjust the clearance by moving the upper feed

arm

f)

forward

or

backward.

1. Needle bar lift amoung

0

i : Reference line

I '

• j

I / 2.2mm

Fig. A

* Turn the machine pulley toward you. When the need

leO

is

at

the position

2.2mmabove

the lowest position, loosen

thesetscrewf),

and adjust so that the rotating hook point 0

is

at

·the center

of

the needle

0.

* Adjust so that the clearance between the rotating hook point 0 and the needle 0

is

0.05

"'

0.1

mm.

2.

Needle bar height

0

•

Reference line

Fig. B

* Loosen the set screw

8.

and raise

or

lower the needle bar 0 so that the clearance between the upper edge

of

the needle hole and

rotating hook point 0

is

about 0.5 mm when the rotating hook point coincides with the center line

of

the needle

0.

* Refer to figure A for the lowest position of the needle bar

0.

and to figure B to raise the needle

bar

0 by 2.2 mm.

-9-

From the library of: Superior Sewing Machine & Supply LLC

~~·1i~*

me~

:~i~~-~·~t~~tse

~~*a~s:

···-

~..;.:.:;__;~~-

. i '

-'"---~·

1.

How

to remove the presser foot, upper feed dog, needle plate and feed dog

•

(I) Loosen the set screw

0,

and then remove the needle

8.

(2)

Remove the set

screw8,and

then remove the

presserfootG.

(3)

Remove the hexagonal bolt

0,

and then remove the upper

feed dog

0.

(4)

Remove the cap screw

8,

and then remove the needle plate

••

(5)

Remove the set screw

f),

and then remove the

feed

dog(!).

* For model

DB2-B792-015,

loosen the hexagonal bolt

0,

and then remove the upper feed dog

0.

2.

How

to attach the presser foot, upper feed dog, needle plate and feed

dog

..

---:~--

0

•

r----

I

-----

-~jii

__

F.

Jl,

~

'-8

Slide plate

•

(I)Temporarily tighten the

feed

dog(!)

by

using thesetscrew

f).

(2)

Attach the needle plate 0 by using the cap screw

8.

* Turn the machine pulley to move the feed

dog(!),

and then

secure it

in

place, by using the set screw

f),

so that there are

front/back and left/right margins

in

the grooves

ofthe

needle

plate

0.

* Confirm the height

of

the feed dog. Refer to page 6.

(3)

Attach the upper feed dog 0 by using the hexagonal bolt

0.

(4)

Attach the presser foot 8

by

using the set screw

8.

* Confirm the height

of

the presser foot

8.

Refer to page

6.

* Confirm the clearance between the upper feed dog 0 and the

presser foot G. Refer to page

8.

(5)

Attach the needle 8 by using the set screw

0.

6mm

-10-

From the library of: Superior Sewing Machine & Supply LLC

Brother 082-8792 User manual

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