Pfaff 481 Service Manual

481

Service

PFAFF

INDUSTRIEMASCHINEN

Manual

GMBH

KAiSERSLAUTERN

Instructions

and

Illustrated Guide for

for Adjusting

Tape-Recorded

the

Instructions

Pfaff 481

Important

Never

damage

length

with the reverse-feed control depressed, that means with the machine

wardsata

note

use a

C-clamp

Its

special

of "0"on

stitch

on the needle bar of

coating.

Model

lengthof1.5

Furthermore,

N machines have to be carried out at a stitch length of 1.5mmand

mm.

Pfaff

480 series

all adjustments

machines

which

are to be made at a

because this

set

for sewing back

would

stitch

The machine can be blocked at certain positions by Inserting a 5-mm-thlck pin In one of

the holes In the bearing plate

the

pin,

be sure to push ItInuntil

which

Is located underneath the face cover.

Itenters the slotInthe disc

behind

the bearing plate. For

When

Inserting

easy Identification, the Individual holes are marked by the numbers 1 to 5 or by the appro

priate adjustment data. The abbreviations used In this connection stand for the

n. o. T. =

n. u. T. =

o. T. N. =

o. T. F. =

Schl.-H. = 1.8 mm

past

the

topofthe

past

the

bottom of

topofneedle

topoftake-up

past the

bar

stroke

lever

bottom of

needle

the

stroke

bar

needle

the

stroke

bar

needle

stroke

bar

following:

stroke

The following tools, gauges and accessories are required for adjusting the Pfaff481;

1

setofscrewdrivers

1

setofalien

1

setofspanners

1

22-mm

spanner

1

metal

rule

1 cylindrical pin, 5 mm dia..

1

universal

1

wrapper

1

stripofwhite

gauge.

with

keys

System

paper,

with

ranging

from

Order

blades

from

7 to 14 mm

Order

Nr.

61-111642-19

134

needles

sewing

thread

from

2 —10mm

1.5

to 6 mm

wide

No. 13-030341-05

and

material

wide

for

testing

purposes.

1.

Preparations

for

adjusting

Note:

The machine can be blocked at different positions by inserting the 5-mm-

thick pin in the appropriate hoie of the bearing plate. For easy identifica

tion,

the

priate

holes in

adjustment

the

bearing plate

data

(Fig. 1.0.1.).

are

marked by numbers or

the

appro

Fig.

1.0.1.

1.1.

1.2.

1.3.

1.3.1.

1.3.2.

1.4.

Remove

Take

To Turn

Push

bearing

The

the

belt

out

both

screws

block

the

machineatthe

the

balance

the

pin into

plate.

functionofeachofthe

guard.

of

the

wheeltobring

the

hole

five

1.4.1. Hole 1 (0.6 n. o. T.) = 0.6 mm

1.4.2.

1.4.3.

1.4.4.

1.4.5.

Hole

2 (o. T. F.) =

Hole

3 (0.6 n. u. T.) = 0.6 mm

Hole

4 (Schl.-H. 1.8) = 1.8 mm

Hole

5 (o. T. N.) =

topoftake-up

topofneedle

face

cover

various

the

until it

holesisas

past

lever

past

bar

1

and

positions,

needle

enters

the

topofthe

stroke.

the

bottomofthe

the

bottomofthe

stroke.

remove

it.

proceedasfollows:

bartothe

the

follows:

desired

slotinthe

needle

bar

position.

disc

stroke.

bar

stroke.

bar

behind

stroke.

the

2.

Zeroing

the

feed

motion

Correct

setting:

The

stitch

feed

length

dog

must

control

not move

setat"0".

when

you turn

%

the

balance

wheel with

the

2.1.

2.2.

2.3.

2.4.

2.4.1.

2.4.2.

2.4.3.

2.4.4.

2.4.5.

2.4.6.

2.4.7.

2.4.8.

Fig. 2.0.1.

Remove

Raise Remove

Adjustment

Turn Take

gasket,

Take

Loosen

tobeturnedonits To

crank3(see

Rotate

shaft

no

Tighten

Check

the

needle

the

presser

the

knee

proceduretobe

the

stitch

iength

out

the16screwsofthe

making

the

oil

sponge

both

clamp

faciiitate

longer

the

until

both

this

adjustment,

Fig. 2.0.1.).

balance

the

feed

moves.

clamp

adjustment

sure

from

the

bar

iifter.

lever

together

controlto"0".

that

the

outofthe

screws

2 of

shaft

against insertascrewdriver

wheel

andatthe

dog

(or

screws

2 of

(see

topofpage).

needle

with

applied

gearcase

oil, if

gearcase.

feed

rather

feed

bar.

its

joint

when

the

cover

any,isdrained

crank1just

resistance.

same

the

screwdriver

crank

1.

and

tilt

the

machine

gearcaseisopen

and

remove

off

intoacontainer.

sufficientlytoallow

in

the

slotoffeed

time

adjust

feed

in feed rock

back.

(Fig. 2.0.1.)

the

cover

crank1on

shaft

the

rock

crank

with

crank

its

shaft

Its

3)

Note:

The feed motion

can

also be zeroed with the

gearcase

ciosed (see Fig.

Qb

2.O.2.).

Fig.

2.5.

2.5.1.

2.5.2.

2.5.3.

Adjustment

2.O.2.).

Turn

Pusha22-mm

feed

Loosen

2.5.4. With

regulator

shaft

2.5.5. Hold there

2.5.6.

Check

slotofthe

2.0.2.

proceduretobe

the

stitch

iength

regulator

the

crank3)remains

the

is a

this

shaft2fast

clamp

screw

aidofthe

shaft

2 until

spannerinthis

clearance

adjustment

feed

controlto"0".

open-ended

4 of

spanner

the

absolutely

of 5 mm

(see

rock

shaft

applied

spanner

with

feed

position

it.

regulator

pushed

dog

still

between

when

and

over

(or

when

tighten

feed

topofpage2)and

crank.

the

hexagon

crank

hexagon

rather

the

regulator

^ r

gearcase

tension

3. tension

the

screwdriverInfeed

balance

clamp

screw4,making

crank3and

pull

the

coverisclosed

nut1and

nut1turn

wheelIsturned.

the

screwdriver

(Fig.

hold

feed

rock

sure

casting.

outofthe

Feed

lifting

motion

Correct

setting:

The feed dog should be at Its highest point when

the

needle bar Is at a

position 0.6 mm past the bottom of its stroke (pin in hole 3). In this position,

the

notchinthe

below

the

feed

centerofthe

lift

shaft

eccentric

(Fig. 3.O.2.).

should

be

positioned

perpendicularly

I."

Fig.

3.0.2.

3.1.

3.2.

3.3.

3.4. In

3.5.

3.6.

Fig.

Loosen

Bring block

Turn

dot

this

Leave

Check

3.0.1.

both

screws2of

the

needle

the

machineInthis

feed

lift

line

eccentric

In Fig. 3.O.2.), I. e.

position,

the

pin In

this

adjustment

bartoa

securely

the

holeofthe

feed

lift

eccentric

position

0.6 mm

positionbyInserting

1 until its

the

tighten

feed

notch

dogisat

both

bearing

(see

topofpage).

points

screws

plate.

1.

past

its

2.

the

exactly

highest

bottom

pin In

of its

hole

3.

downwards

point.

stroke

(see

and

dash-

Feed

dog

height

Correct

setting:

The the

at

"0"

stroke

feed

gauge

and

(pin in

dog

should

throughout

the

needle

hole

be

positionedinthe

its

entire

barisataposition

3). (Fig. 4.0.2.)

length

when

middle

the

0.6 mm

of its

stitch

past

slots

length

the

and

contact controlisset bottom

of its

Fig.

4.0.2.

4.1. Turn the stitch length control to "0" and check to make

4.2.

4.3.

4.4.

inserted

Loosen Loosen

Place

the

4.5.

4.6.

4.7.

needle

Lower

Position

Push

the

4.8. Turn dog

4.9. Tighten both

4.10.

4.11.

4.12.

feed

Check

throughout

crank

Raise

pull

Check

in

hole

clamp

both

the

universal

direction of

plate.

the

presser

the

feed

the

feed

doginthis

eccentric

is in

contact

dog

is still

to

make

its

1.

the

presser

the

outofthe

this

adjustment

3.

screw

2 of

screws

gauge

and

bar

lifter to

upwards

position.

feed

4 in

under

its front

middleofits

until

ciamp

feed

doginthe

bar

bushing5underneath

with

the

screws

that

length

lifter,

holeinthe

(see

gauge

4 of feed rock

the

remove topofpage).

clamp

centeredinits

sure

entire

bar

lift

feed

the

rest

the

throughout

slots.

feed

and

crank

rock

presser

edge

the

dog

firmly

the

bearing

1. shaft

is flush with

presser

slots

feed

dog

feed

rock

shaft

is still in

tighten

gauge

plate.

crank

foot so

footonthe

(Fig. 4.O.2.).

contacts

shaft

its

entire crank

clamp

from

under

3.

that

the

crank length (Fig. 4.O.2.). 3, making

contact

screw

the

sure

the

front

gauge.

3 until

presser

the

arrow

edgeofthe

gauge

sure

with

the

2 of

pin is

points

and

the

that

gauge

feed

foot,

in

hold

feed

the

lift

and

5.

Feed

driving

motion

Correct

setting:

The

and

set

feed

down

0.6 mm

dog

with

past

should

the

QC

not move

machine

bottom

set

of Its

when

for

stroke

the

reverse-feed

Its

longest

(pin In

stitch

hole

control

and

3).

Is moved up

the

needle

bar

6.1.

5.2.

5.3.

5.4.

5.5.

5.6.

5.7.

5.8.

5.9.

Loosen

Bring

block Set

both

the

needle

the

machineInthis

the

machine

To facilitate

crank

3 (Fig. 5.0.1.).

Move

the

driving

reverse-feed

eccentric

driverInfeed

In

this

position,

the

feed

this

the

driving

screwdriver

Pull

2 In

Check

Pull

screws

bar

for

adjustment,

until its

rock

shaft

tighten

outofthe

eccentric

adjustment

2 of

feed

to a

driving

position

positionbyinserting

Its

longest

push

stitch.

the

controlupand

notch

is visible

crank

3) is

the

accessible

holeinthe

1.

(see

topofpage).

outofthe

slotInthe

eccentric

0.6 mm

screwdriver

down

and

completely

screw

bearing

plate

feed

1.

past

the

Into

and

simultaneously

the

feed

motionless

2 In

feed

and

rock

bottom

pin In

the

dog

driving

tighten

shaft

of Its

hole

3.

slotoffeed

(or

rather

(Fig. 5.0.1.).

eccentric

the

second

crank.

turn

stroke

rock

the

and

shaft

feed

screw

1. screw

6.

Zeroing

the

needle

feed

motion

Correct

setting:

The

turned

needle

with

bar

the

should

stitch

make

length

no feed motion when

control

setat"0".

the

balance

wheel is

Fig.

6.0.1.

6.1. Turn

6.2. To facilitate

6.3.

needle

Take

the

stitch

feed driving

out

the

length

zeroing

two

screwsinthe

controlto"0".

the

needle

crank

3 (Fig. 6.O.2.).

feed

motion,

coveratthe

insertascrewdriverinthe

backofthe

machine.

6.4. Loosen clamp screw 1 of needle feed regulating crank 2 (Fig.

6.5. Adjust motion

feed

needle

when

driving

feed

regulating

the

balance

wheelisturned

crank3remains

crank2so

still).

that

(I.e.

the

that

needle

bar

the

screwdriverinneedle

Fig.

6.0.2.

slot

6.0.1.).

makesnofeed

6.6. In this position, securely tighten clamp screw 1 of needle feed regulating

crank

2.

6.7. Check this adjustment (see top of page).

6.8. Leave the screwdriver in the slot of driving crank 3.

of

7.

Timing

the

needle

feed motion

Correct

setting:

Both the needle bar and

reverse-feed control Is moved up and down with the machine

the

feed dog should remain motionless when the

set

for Its

longest stitch and the needle bar set 0.6 mm past the bottom of Its stroke

(pin In

hole

3).

Fig. 7.0.1.

7.1.

7.2. Bring

7.3.

7.4.

7.5.

7.6. In

Loosen

block

the

plate.

Turn

needle

7.0.1.).

Set

the

Move

reverse-feed eccentric feed

driving

this

both

screws

the

needle

machineInthis

feed

machine

2 until

crank

position,

7.7. Pull the pin out of

in

needle

feed

eccentric

7.8.

7.9. Remove

Check

this

the

adjustment

screwdriver

1 in

needle

feed

eccentric

bar

to a

position

0.6 mm

positionbyInserting

eccentric2so

for its

longest

control4up

the

needle

3 Is

completely

tighten

the

hole In the bearing plate and tighten

2.

(see

from driving

that

Its

stitch.

and

bar

down

remains

motionless).

accessible

topofpage).

crank

8

slot

and

still (I. e. until

screw

2.

past

the

pin In

points

forward

simultaneously

1 In

needle

3.

bottom

the

of Its

3 of

(see

turn

stroke

the

arrow

needle

hole

screwdriverInneedle

feed

eccentric

the

second

and

bearing

In Fig.

feed

2.

screw

1