Pfaff Automatic 260 Manual de usuario

260+

360

•

erv1ce

anual

Functions

Assemblies

Adjustment

Procedures

Sewing-off

Trouble

Shooting

Electrical

Equipment

SERVICE

MANUAL

for

Pfaff Sewing Machines 260 and 360

with built-in automatic

embroidery

mechanism

Functions

Assemblies

Electrical Equipment

Adjustment Procedures

Sewing-off

Trouble Shooting

G·M

·PFAFF

KARLSRUHE-DURLACH

BRANCH

Blank Page

Foreword

This

profusely

illustrated

Service

Manual

for

Pfaff

260 (360)-

261

sewing ma-

chines is a

valuable

source

technical

information

which is

primarily

in-

tended

for

Pfaff

dealers

and

their

service personnel.

It goes i

nto

greater

detail

and, thus, complements the instruction

book

which

accompanies each machine. The

nomenclature

used in the

pertinent

spore

ports

catalogue

has

also

been used

throughout

this

book.

Numerous

photo-

grap

and

draw

ings

are

interspersed in

the

text

order

give

users a

good

deo

the assembli

being

discussed.

Beg

nning

with a general description

the

workings

a sewing machine,

the

monual

proceeds

discuss

how

the

zigzag

and

automatic

mechani

sms

function.

The

adjustment

procedures

ore

intended

for

those

our

dealers

who

hove

remedy

sewing

trou

,bles

that

may

occur

occasionally.

The

prime

object

this manual

howeve

import

additional

technical

knowledge

all

who

ore connected

with

the sale and repo

the

Pfaff

260

(360)-

261

and

enable

them

render

satisfactory

service.

PFAFF

CONTENTS

Foreword

How

Sewing

Machine

Functions .

TheNeedle

. .

The Sewing

Hook

. . . .

itch Formation

and

Feed Motion

The

Take-Up

lever

The

Feed

Dog

Dropping

the

Feed

Dog

Stitch

length

Regulation

Reverse

Sewing

. . . .

Regulating

the

Thread

Tension .

The Bobbin

Thread

Tension .

Regulat

the

Thread

Tension .

The

Needle

Thread

Tension

W i

nding

the

Bobbin .

Inserti

the

Bobbin

Case

Needle

and

Thread

Chart

Threading

the

Needle

Zigzag

Sewing .

The

Zigzag

Mechan

The

nge

r-Tip

Contro

l . .

Changing

the

Needle

Positi

. . . .

Mechan

cal

Principle

Automatic

Machines .

Mechan

cal

Principle

the

Pfaff

-261

Automatic

The

Electrical Equipment . . . . .

Suppress

Radio

and

Interference .

The

lighting

System

The Electric Drive .

Multi-Voltage

Motors

for

Pfaff 260

and

360

Machines

Maintenance

Storing

Sewing

Heads

and

Cabinets

Checking

Cabinets

and

Stands

. .

Attaching

the

Bedplate

Extension .

Mount

ing

the

Sewing

Head

Removing

the

Rust-Preventative Fluid

Cleaning

and

O iling

Removing

the

Top

Cover

Cleaning

the

Feed Dog

and

the

Sewing

Hook

Removi

and

Replacing t

Face

Cover

The

Needle

Threader

Stitching off

the

Machine

Checking

Automa~ic

Mechanism

Regul

ing

the

Pressure

the

Materia

Threading

the

Machine

for

Two-Need

Work

Preparing

the

Machine

for

Two-Needle

Decorative

Sewing

Rules Your Cust

omers

Should Know

Adjustment

Procedures

The

Feed Eccentric .

Page

The

Upper

Driving Belt Sprocket 46

The

Needle

Vibrating Eccentric Bevel

Gear

. 47

The Driving Eccentric

for

the Automatic Mechanism

Timing the Sewi:ng Hook 48

Pfaff

260-

Needle

Bar

Rise

The

Upper

Driving Belt Sprocket

Pfaff

360-

Needle

Bar

Rise

Exchanging

the

Sewing Hook

the Pfaff

360

The Position

Finger

Brocket . . 52

Setting

the

Needle

Bar

Correct Height . 53

Adjusting

the

Feed

Dog

the

Feed Slot . . 53

Setting

the

Presser Bar

and

the Feed

Dog

Correct Height 55

Dismantling, Replacing

and

Adjusting

tne

Stitch

length

Control 56

Adjusting

the

Bobbin

Winder

. 57

Setting

the

Needle

Threader

Changing

the

Thread

Check Spring

Changing

the

Cord

Belt . . . . . . . . .

Assembling

and

Adjusting the

Zigzag

Regulator

Mechanism

The

Zigzag

Regulator

Mechanism .

Stripping

the

Automatic Mechanism

Dismantling

the

Stitch Width Control

The Stitch

Width

Regulating Mechanism

the Machine Arm 64

The Stitch Width Control 65

Adjusting the Stitch Width Control . 66

Rough Adjustment

Zigzag

Stitch .

Fine Adjustment

Zigzag Stitch

Zeroing

the

Needle

for

StraightStitching

Adjusting

the

Needle

Position . . 68

Centering

the

Needle

the

Needle

Plate

Slot 69

Converting a Pfaff

260

(360)

into a Pfaff

260-261

(360-261)

Installing

the

Automatic Mechanism

Mounting

the

Engaging

levers

Essential Parts

the

Pfaff

(-261)

Automatic

Mounting the Pressure Spring Assembly 75

Adjusting

the

Engaging

levers

. 75

Replacing

the

Top

Cover

. . . . . . . . .

Checking

the

Needle

Position

Relation

the

Needle

Plate

Slot

Testing

the

Performance

the

Automatic Mechanism . 77

Checking

the

Operation

the

Engaging

levers

Eliminating Troubles

Automatic Sewing . 77

Installing a

260

261

Motor

into

the

Pfaff

260

(-261)

Changing

the

Motor

Belt

Trouble

Shooting

. . . . . . . .

Dismantling

and

Reassembling

the

Pfaff Hook . 84

Works

the

Pfaff

260-261

. • 85

TheTwo-Position Presser

Bar

lifter

. 86

The PfaffTool

Kit

. . 86

Abridged

Adjustment Procedure

for

the

Zigzag

Regulator Mechanism

Pfaff

260

(360)

Machines

Blank Page

How a

Sewing

Mact.ine

Functions

Household sewing machines all make

the

conventional lockstitch.

This

type

stitch consists

on upper (needle)

and

a lower (bobbin) thread locked together·

the material being stitched. The lock

threads

pulled to the middle

the fabric so

that

the seam has the same

appearance

top

and

bottom.

Every sewing machine designed to produce this type

stitch must hove

the

following component ports

and

assemblies:

a needle

a sewing hook, complete with bobbin

case

and

bobbin

(typical

any lockstitch sewing machine)

a take-up lever

upper

and

a lower tension mechanism

a feed

dog

Stitch forming

and

feeding mechanisms

a bobbin winder.

The

Needle

contrast to

the

hand sewing needle, the machine sewing needle has

the

eye

near

its tip.

penetrates

the

material

every stitch, carrying the

thread

down through the hole it has mode

the

fabric.

it rises

after

reaching

the lowest point

its stroke, the thread bulges

out

on the short-groove side

the needle to form a loop

above

its eye. This loop

entered

the correct

time by the point

the shuttle

sewing hook (figs. 1 &

2).

l 1

Fig. 1 Fig. 2

Sewing machine needles

are

available

many different varieties

and

sizes,

and

are

classified into several groups,

systems.

Fig

. 3

Needle

System

130

(Needle

size, e. g.

. 80, 90

1()()_

given in hundredths

millimeters)

F = Flat side

shank

L =Length

needle

St=

Needle

size (shaft diameter)

I =

long

groove

k =

Short

groove

H =

Scarf

(cleoronce cut)

S = Point

Eye

Fig. 4 Fig. 5 Fig. 6

Pfaff domestic sewing machines normally use System 130 R

needles

with flat

shank

and

scarf

(Fig.

4).

System 130 B round-shank needles

are

used for cord-

ing

and

two-needle fancy stitching.

Make

sure you use

only

"ORIGINAL

PFAFF

" needles (see a

page

Needle

sizes

are

determined by

the

shaft

diameter

(St

Fig.

and

ore

measured

hundredths

millimeters. A No. 100 needle,

for

example,

has

blade

diameter

100

/Joo,

one, millimeter.

Opposite

the flat side

the

shank, a long

groove

extends all

the

way down

the needle eye.

Pfaff zigzag

and

automatic sewing machines, this

groove

must face

toward

the

operator

always. The scarf,

clearance

cut,

marked H

Fig. 4 then faces

toward

the sewing hook.

The correct relationship between needle

and

thread size may

seen from the

Needle

and

Thread Chart

page

18.

The

Sewing

Hook

The functions

the sewing hook

are

(1)

enter

with its point

the

needle

thread

loop

which forms

the

needle

eye

the

needle ascends,

(2)

en-

large

this loop,

and

(3)

pass

around

the stationary bobbin

case

(Fig.

6).

There

are

different types

loop

takers,

the

most

popular

which

ore:

a. Shuttles

that

move

a race

and

are

driven by a shuttle driver, such

the

central-bobbin,

oscillating, shuttle d·epicted

Fig. 7,

and

b. Sewing hooks which

ore

carried

shaft

and

revolve freely.

fig

. 7 Oscillating shuttle Fig. 8 Rotary hook with floating bobbin

case

1 = Shuttle race (cut

-away

view) 4 = Bobbin

case

1 = R

otary

hook 2 = Bobbin

case

3 = Shuttle 8 = Shuttle driver 3 = Retainer

Fig. 9 Rotary hook with

stationary

bobbin

case

1 = Hook

gib

2 = Hook point

3 = Hook

shaft

4 = Bobb<n

case

bose

5 = Sewing hook

8 = Bobbtn

case

cop

9 =

Center

stud

= Bobbin

case

latch

= Bobbin

case

position fi

nger

brocket

= Bobbin

case

position finger

The

rotary

sewing hooks

mentioned

under

above

are

incorporat

modern

sewing machines

two

varieties,

known

as:

a. The

rotary

hook

with

floating

bobbin

case.

type

sewing

hook,

the name

implies,

features a

bobbin

case which

floats

in the

hook

bowl

and

kept

from

falling

out

retainer

(Fig.

8).

b. The

rotary

hook

with

stationary

bobbin

case. The

bobbin

case

this

type

hook

features a

ring-shaped

flange

which runs in

annular

groove,

raceway,

cut

into

the

hook

bowl.

held

place

hook

gib

so that

cannot

fall

out

while

sewing. The

bobbin

case

cap

is pushed

the

center stud in

the

bobbin

case base (Fig.

e c h b g

f i

10-

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