Pfaff 238 Manuel utilisateur

PFAFF

238

238-0

9030

Instruction

Book

and

Service

Manual

From the library of: Superior Sewing Machine & Supply LLC

/hphee ^

238

(

PFAFF)

238-0

High-Speed

Zigzag

Sewing

Machine

Organized

with

iink

take-up

and

transverse

rotary

hook

instruction

Book

and

Service

Manuai

G-MPFAFFAG-KAISERSLAUTERN

BRANCH

From the library of: Superior Sewing Machine & Supply LLC

Foreword

This

Instruction

book

contains

much

vaiuable

Information

about

Pfaff

238

and

238-0

high-speed

zigzag

sewing

machines.

Though

not

intended

full-scale

textbook

capable

answering

all

questions

sewing

exhaustively, it offers sufficient information

the

construction,

function

and

operation

the

various

mechanisms

enable

every

interested

operator

get

know

her

machine

and

attain

maximum

efficiency

quickly

possible.

The

instructions

for

mechanics

contained

the

second

part

this

book

will

doubt

much

appreciated

by all

maintenance

men

servicing

our

sewing

machines

since

even

the

best

sewing

machine

will

work

satisfactorily

only

if it is

employed

properly

and

serviced

by an

expert.

have

made

every

effort

render

the

presentation

these

instructions

simple

possiblle

and

have

included

numerous

illustrations

order

afford

better

understanding.

welcome

any

suggestions

and

recommendations

which

you

may

wish

make.

PFAFF

From the library of: Superior Sewing Machine & Supply LLC

Instructions

for

Operators

Brief

Description

the

Pfaff

238

The

Pfaff 238

high-speed

zigzag sewing machine Is an Improved version of

the

Pfaff 138

which has been redesigned to match

our

modern high-speed straight stitchers In out

ward

appearance

and

sewing

performance.

Like the Pfaff 138, It Is organized with link take-up and transverse rotary sewing hook

which features aspecial balancing collar In order to

ensure

vibratlonless running.

The Pfaff 238 Is supplied in Models A

and

B for a maximum stitch length of down to 7

stitches

per

Inch.

The

permissible

top

speed

the

machine

depends

the

model

and

the

stitch

width.

Model B machines

are

normally fitted for a stitch width of 11/64", or 4.5 mm, and a

top

speed

3,500

s.p.m.

desired,

Model B

machines

can

be fitted with a

special

parts

set

for a stitch width of

about

'A", or 6.0 mm, and maximum

speed

of 3,200 s.p.m.

As a

special

variety,

the

Pfaff

238

can

supplied

Model

for

maximum

stitch

width of 5/32" and a sustained

speed

of 3,800 s.p.m.

Setting

the

Machine

most

Instanoes,

the

Pfaff 238 Is

supplied

for Individual

power

drive.

Sewing

head

and

power

table

are

packed

separately.

The machine Is driven by a

Va-HP

clutch motor. (Type of current and voltage optional to

suit

local

requirements.)

Power

transmitted

from

the

motor

the

sewing

machine

means

of a V-belt 25/64",

10 mm,

wide

and

conforming

German

DIN 2215

standards.

When

connected

to a

50-cycle

power

supply,

the

motor

runs

speed

of 2,800 r.p.m.,

and

when

connected

to a

60-cycle

power

supply,

3,400 r.p.m.

The

motor

pulley

can

easily

exchanged

order

to vary

the

maximum

sewing

speed,

may

required.

The

relationship

between

pulley

diameter

and

maximum

sewing

speed

Indicated

the

table

below:

From the library of: Superior Sewing Machine & Supply LLC

Balance

Whppj

nip.

Motor

Speed

2,800

r.p.m.

Motor

Speed

3,400

r.p.m.

Motor

Pulley

Dia.

Order

No.

Stitches

per

Minute

Motor

Pulley

Dia.

Order

No.

Stitdies

per

Minute

63 68

16-437

010-55

2,500

---

76 67 72

16-437

020-55

2,600

- - - -

16-437

030-55

2,800

-- -

-•

16-437

040-55

3,000

16-437

010-55

3,000

16-437

050-55

3,200

16-437

020-55

3,200

16-437

060-55

3,400

16-437

030-55

3,400

90 95

16-437

070-55

3,600

16-437

040-55

3.600

100

16-437

080-55

3,800

16-437

050-55

3,800

dfn ~

effective

diameter

0 =

outside

diameter

2.48",

2.83",

3,35",

2.64",

2.95",

90 mm = 3.54",

2.67",

3.00",

95 mm =

3.74",

2.79",

3.15",

100

3.94".

- 0

Fig.

Unpack

the

sewing

head

cautiously

avoid

damage

the

machine.

After

removing

the

lid

from

the

box,

unscrew

the

wood

screws

which

hold

the

cushioned

wooden

blocks

that

support

the

machine

the

box.

Cautiously

lift

the

machine

out

the

box,

wipe

off

the

dust

and

mount

the

machine

the

table

that

rests

the

rubber

pads.

facilitate

the

mounting

the

V-belt,

slip

it on

the

machine

pulley first.

Then

slightly

lift

the

motor

and

pull

the

belt

onto

the

motor

pulley.

For

adjusting

the

V-belt

tension,

please

refer

the

instructions

which

are

furnished

with

the

motor.

The

machine

dispatched

without

oil in

the

reservoir

and

must

not

run

while

this

condition.

From the library of: Superior Sewing Machine & Supply LLC

The

Lubrication

System

oil

reservoir

has been

Incorporated

in the top cover of the

machine

(Figs.

4 &5)

which holds enough oil to ensure adequate lubrication of the arm shaft parts.

After pulling out plug C

(Fig.

3),

fill

about 4

fl.

oz. of ordinary sewing machine oil

(Order

No.

280-1-120122)

or a technical white oil having a viscosity of 150

R/68°F

175

S/es'F

Into

the

reservoir.

The oil in the reservoir

will

last for a longer time, depending on how long the ma<^ine is

in operation each day.

Oil

should be replenished when the red tip of the oil level gauge

which can be

seen

through the oil

sight

glass

emerges

from the

surface

of the oil.

Fig. 4 shows the

open

oil reservoir with oil wick, Fig. 5 the bottom of the reservoir with

the lower end of oil wick D which protrudes into hole A and supplies oil to the arm

shaft

center

bearing.

The

oil

seeps

through

vent

hole

into

the

hollow

arm

shaft

and

distributed

inside

the

arm

shaft by a packing. Emerging from additional vent holes, oil is supplied to the various

arm shaft

bearings

and the feed eccentric. Dripping oil is collected by a large oil drip

pan and

accumulates

in a detachable plastic oil bottle. (Fig. 6)

7715

Fig.

From the library of: Superior Sewing Machine & Supply LLC

The

oil

which

has

accumulated

this

bottle

may

returned

the

oil

reservoir

without

prior

cleaning.

After

the

oil

has

circulated

the

machine

several

times,

it Is

advisable

to filter it

through

piece

of linen

before

it is

returned

the

reservoir. This will not

Impair

its

lubricity

the

least.

Used

oil,

naturally,

may

employed

for

other

lubrication

purposes

well.

All

other

oiling

points

which

are

marked

arrows

Figs.

3, 4, 5, 7

and

have

oiled

hand.

Special

care

should

taken

applying

oil to

the

large

oiling felt

which

supplies

oil

the

needle

vibrating

eccentric

and

can

reached

through

aperture

F(Fig. 5).

This

pad

should

soaked

with oil

regularly.

Put

one

drop

of oil

into

the

hook

raceway

each

day

the

machine

is in

operation.

Fre

quently

take

off

the

needle

plate

and

remove

the

lint

which

has

accumulated

its

underside

and

the

feed

dog.

This

very

Important

because

the

lint

contains

small

particles

dressing

which

have

abrasive

effect

the

sewing

hook

and,

time,

will

cause

excessive

wear.

7722

Fig.

From the library of: Superior Sewing Machine & Supply LLC

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