Pfaff 3334 Service Manual

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IS'

' " (D

(TOFF)

Automatic

SERVICE

Lockstitch

3334

Bortocker

MANUAL

Foreword

Pfaff sewing machines

are

quality products. Constant checks ore

being made throughout the production process to ensure that o

But

high quality standard is maintained.

machine

results

has to be operated and serviced

aretobe

obtained.

even the best sewing

skillfuify

if satisfactory

This book has been compiled cs a source of information for all Pfaff mechanics servicing Pfaff 3334 automatic bartackers and

will serve as a valuable guide in performing minor repairs and

adjustments.

We have made every effort to render the presentation of these

instructions as simple as possible and have included numerous

illustrations inordertoafford a better understanding.

G.M.PFAFF

Kaiserslautern

Branch

SERVICE

MANUAL

Automatic

PFAFF

Lockstitch

3334

Bortocker

Contents

Description

General

and

Information

Operation

a. Purpose of Employment 6

Application

Possibilities 7

Page

Operation

a. Efficiency Rating 8

ModeofOperation

b. c. Sewing Cycle 9

3. Mechanical Setup . 13

Shuttle

Thread

B. Instructions for

ond

Feed

Motion

Automatic

Trimming Action 20

Needle

Stop

Repair

Bar

Motion

Drive

1. Disassembly , 30

2. Assembly 31

3. Adjustment

a. Timing the Shuttle

and

Check-Up 33

and

Setting the Needle Bar ot Correct Height 33

b. Timing the Feed Motion 39 c. Timing the Thread Trimming Action 46

Work

d. Adjusting the

Clamp 49

e. Timing the Stop Motion 49

f. Timing the Thread

Nipper

and

Adjusting the Thread Tension 53

4. Stitching-Off 60

a. Sewing

Needle

Thread

c. Bobbin Winding 61

Needle

d. e. Threading the Bobbin f. Inserting the Bobbin

Setting-Up

Individual

Bench

c. Individually Powered Machine on Power Benching

Subclass

Threading 62

Case

Power

Drive

....

Conversion

a. Changing the Feed Cam 69

b. Changing the Knife Cam 70

c. Changing the Work Clamp Feet 71

d. Changing the Feed Plate 71

63 63

7. Trouble Shooting 71 a. Skipped Stitches 71

b. Thread Breaking

c. Needle Breaking 71

d. Heavy Working 72

e. Irregular Stopping 72

Machine

Care

a. Cleaning and Oiling 75 b. Dismantling the Shuttle Race 77

C. Electromagnetic Control 78

General

Information

Brief Description 78

b. Key to Symbols Used 79

Operating

Instructions for X35

and

X45 Devices 80 a. Turning on Master Switch HS 80 b. Inserting the

Work

and

Operating

Foot Switch FS (1st Switch Position) 80

c. Starting the Machine by Operating

Foot Switch FS (2nd Switch Position) 80

d. Sewing Cycle

and

Automatic Stopping of Machine

....

3. Working of Device 84

Master

Switch

Foot

Switch

FS 84

Solenoid

Switch

4. Mounting

Switch

Lever

Solenoid

Switch

Solenoid

and

Switch

and

Adjustment Procedures 87

Subclass

1. Subclasses Having the

Subclasses

Information

Having

the

Same

Gear

Ratio 92

Knife

Cam

3. Subclosses Requiring Additional Parts 94 One

4. Principal Parts Varying from

5. Special

lock

Organizational

Designs

Arranged

Parts 96

by Shapes 99

Subclass to

Another

....

A. Description

General

and

Operation

Information

Stitch Type:

LoopTaker System;

Bobbin Capacity:

Needle System:

Foot

Lift:

Maximum

Length of Tack:

Maximum

WidthofTack:

ClassesofWork:

Lock

stitch

Oscillating (central bobbin) shuttle

66 yds No. 40/3 cotton

Model A and B machines use System 34 R needles for

110).

or 34 D

Model C

sewing

ordinary sewing operations, and System 34 needles for leather work (needle size up to

machines

use

System

332Rneedles

for ordinary

operations, and System 332Lror 332 D needles for

leather

work.

(Additional needle

page

60).

'V32"

to Vb", or 15 to 16 mm (on

foot lift ranges from "/as" to

1Vib",or36 mm

Va",

22 mm

ModelsAand Bare used for

materials.

systems

thot may be used are listed

earlier

machines the

'V32",

or 9 to 10

light-

to medium-weight

mm).

Model C is used for heavyweight materials (machine features higher needle bar rise and larger take-up

motion).

a. Purpose of Employment

The

Pfaff

seaming

3334isspecially

operationsofevery

designed

description.

for

While

automatic

both

bartacking

the

shape

and short

of the

tack

and the number of stitches per tock ore predetermined for each subcloss, the

sizeofmost

tacks

canbevaried

within

certain

limits.

The machine's field of application embraces oil branches of the sewing indus

try.

Thus,

opart

from

bartacking, it may be

seams,

attaching

justa few additional applications. (See ill.on page 7).

belts

and straps, and

employed

stitching

for

arnamentol

stitching

tacks,

staying

to name

The Pfaff

greatly facilitates the

cles

If desired, the Pfaff 3334 automatic bartacker can be fitted with electro

magnetic

or Pfaff 3334X45 in Model C. On this machine, the functions of raising the

work clomp and storting the

treadles of the standard model ore replaced by a foot switch (Fig. 4).

Feed

The work is held between, and guided by, the work clamp and the feed

plate. To produce the desired

machine bed while the needle moves up and down. The feed motion is deriv

The Pfaff 3334 attains a speed of up to

thickness of the material as well os the size

the machine from one subclass to another, it

exchange the feed plate and the clamp feet rather than the complete work

clamp.

are

being stitched.

control,

Motion

from

the

3334

is of the cylinder-bed construction.

feed

this

com.

handling

version

of the

being

machine

tack,

knownasPfaff

are performed by solenoids, and the two

the material is

work,

Its

slender cylinder arm

particularly

when

3334X35inModels

moved

up and across the

1,200

s.p.m., depending on the

and

shape

of the tack. To convert

will

be sufficient normally to

tubular arti

Aand

If,

however, the shape and size of the tack or the number of stitches in the

design

ore to be changed, the feed cam,

have

to be exchanged.

knife

cam,

worm

and

worm

wheel

b. Application Possibilities

Fig. 1

Operation

a. Efficiency Rating

The output of on automatic bartacker is determined by the following factors:

(1)

the number of stitches

(2)

the

handling

times

per

involved

tack,

in a

given

operation

(which,inturn,

are de

termined by the size and bulkineess of the workpiece),

(3)

the quality of material

(4}

the handy arrangement of the work, and

(5)

the

speed

of the machine.

The

Pfaff

3334

automatic

21, 24, 28,

32, 36,

42,

contained in the Subclass Catalogue (Form No.

lity

of this efficient

and

thread,

48,

bartacker

56,

and 72

can

stitches

machine.Inspecial

fittedtomoke

per

tack.

The

tack

10080)

illustrate the versati

coses,

it may be advisable to sub

7, 9, 14, 16, 18,

design

diagrams

mita sample of the moterial to be sewn as wellas a specimen of the finished

work

eithertothe

Pfaff industrial

Kaiserslautern

sewing

machine

BranchofG.M.

representative.

Pfaff

AGorthe

nearest

b. Mode of

Operation

While both the length and width of a bartack con be varied within certain

limitsbysimply

adjusting a lever, its shape as well as the number of

stitch

es it comprises can be varied only by exchanging the feed cam.Inmany

instances, the worm gear assembly and the knife cam must be exchanged

addition.

The entire sewing action, including the stopping of the

automatically.

The machine is equipped with two cams which ore corried on a joint trans

verse

shaftoneither

sideofthe

machine

arm.

machine,

is controlled

The right, or feed, cam has two pattern-forming grooves, one on each side.

While the groove on its outside face controls the crosswise feed

motion,

the lengthwise feed motion emanates from the groove on its inside face.

The feed cam, in addition, carries

one

or several stop tripping segments as

well as one or several thread nipper tripping segments. Whereas the former serve to stop the machine at the completion of a sewing cycle, the latter

actuate

The number of stop tripping segments and thread nipper tripping segments

the

thread

nipper.

provided on the rim of the feed cam depends on the number of tacks pro

duced

per

cam revolution.

The left,or knife, cam operates the needle and bobbin thread

knives.

As the knives swing forward from the inoperative to the stand-by position,

a sufficient

whichtostart

amountofthread

the

tack.

is pulled from the spool

and

the bobbin with

As the machine makes the last stitch of the tack, the

couses the lower, or main, tension to be

releasedsothat

groove

in the knife cam

the

last

stitch knot

is pulled ino the material.

The main tension will not by reactivated until the machine, depending on the

subclass, has completed

three

to four stitches

after

starting a new tack. In this way, puckering of the fabric is successfully eliminated. This is particularly important for stitching

The machine is

delicate

started

the stop motion lever to swing back

interlocked.

The locking lever prevents the

clamp

while the machine is in

knivestotrim

By the

roised.

When

the

threads.

same

token, the machine

the machine is

started,

fabrics or sewing with long stitches.

by depressing the right treadle. This action causes

and

the tripping

operator

operation

from inadvertently raising the work

since this action would cause the

cannotbestarted

and

locking levers to be

while the work clamp is

the driving belt is shifted from the idler to the

driving pulley and, conversely, when the machine stops, it is returned from

the driving to the idler pulley.

All the

operator

has to do to start the sewing cycle is to press down the right

treadle. After the machine has stopped automatically, she raises the work

clompbydepressing

the

left

treadle.

c. Sewing

The work is held between the work clamp ed

after

Cycle

each stitch to form the

and

predetermined

the feed

plate

andisadvanc

tack design. This design is

produced by moving the material up and across the machine bed as the

needle moves up and down. Fig. 3 illustrates the sewing cycle of a rectang

ular

tock.

When the machine has been started by depressing the right treadle, the

needle

enters

the

fobric

for

the

first

stitch.

After

the

first

stitch

has

been

completed and the needle has risen clear of the fabric again, the work is

moved across the machine bed the predetermined distance between stitches.

This cycle is

repeated

until the tack is completed.

1 ==

Needle

2 =

Needle

3 =

Work

4 = Clamp foot lifting lever 5 = Thread wiper wire

6 = Feed plote

7 = Work clomp feet

8 =

Presser

9 — Presser bar lifting bracket

bar

clamp

bar

frame

Fig. 2 Feed

While the last the

machine

the

last

stitch.

When the left treadle is depressed, the needle

med and the work clomp raised for easy removal of the work.

Electromagnetic Control

stitch

stops

is being

exactly

plate

and

work

formed,

the stop

in the predetermined

clamp

motion

position

and

bobbin threads

is released so that

after

completing

are

trim

On machines fitted with electromagnetic control, various operations that

used to be performed by hand or foot

clomp and starting the

3334,

the

solenoids

the

foot

rest.

When

this

buttonispressed

lowered

onto the

indefinitelybydepressingorreleasing

machine,

ore

activatedbydepressing

down

goods.Atthis

previously,

suchasraising

the work

are controlled by solenoids. On the

to the

first

stage, the

push-button

switch

position,

work

clamp

the

switchFS(Fig.

mayberaised

push

button,asmay

the

work

Pfoff

clamp

or be

required to odjust the position of the work under the clamp. Depressing the

button to the first switchposition will not start the machine.

Only

when

the

button

is depressed to the second

machine be storted by a second solenoid

(Fig.

4).

switch

position

will

the

Crosswise

motion

begins

Schematic Seam Construction

11<^^2r-2-^7

9 8

Crosswise

completed

Work

clomp

Feed

Diagram

motion

piece

plate

Lengthwise motion

begins

Crosswise

motion

begins

Lengthwise motion

begins

Crosswise

motion

begins

Fig.3 The individual phases of sewing a four-sided tack

Lengthwise motion

completed

Crosswise

motion

completed

Lengthwise motion

completed

Crosswise

motion

completed

—1—1

lall

iiaHiiiH;HiK|^88|i88s

Fig.4Pfaff

3334

X35or X45fitted

with

electromagnetic control

Mechanical

Setup

From the foregoing description of the sewing action of a bortocker it is evident that this machine must incorporate the following essential mechanisms, in

addition

to the shuttle

and

needle

bar

drive mechanisms found in

any

ordinary

sewing machine:

(1)

a special feed

termined

(2)

an automatic stop control which stops the machine as soon as the predeter

mined number of stitches

direction

mechanism

offer

each

which

advances the workpiece in the prede

stitch,

have

been

mode

and

the take-up lever has

almost reached the highest point of its stroke, and

(3)

a trimming mechanism whichsevers the needle and bobbin threads.

Shuttle

and

Needle

Bar

Drive

The shuttle driving motion is derived from the cranked arm shaft and trans

mitted to the shuttle via a connecting rod, an oscillating rock shaft, a crank with slide block, end the shuttle driver shaft. This mechanical setup produces the oscillating motion required for this type of shuttle.

The needle

the needle

Feed

bar

is moved up and down by means of the needle

bar

connecting link.

Motion

bar

crank and

The feed motion lengthwise and across the machine bed is controlled by

two pattern-forming grooves, one on either face of the feed cam.

Whenever the material is to be moved in a stroight line lengthwise or across

the machine bed, this motion is controlled by only one of these grooves.

The feed motions emanating from both grooves

are

combined to produce

circular, triangular or other tacks whose sides extend at on angle to the true

lengthwise or crosswise direction of feed.

The groove on the outside face of the feed cam controls the feed motion

crosswise of

the top end of the feed across regulator

and

transforms the throws

the

machine

bed.Asthe

emanating

feed

cam

revolves, o

(Figs.

6 &7}rides in this groove

roller

located

from its curvature into a reciprocating

motion which is transmitted to both the feed plate carrier bar and the work clomp by means of a ball joint connection. The amount of motion across

the machine bed can be adjusted by changing the position of the ball joint

connectioninthe

slot of

the

feed

across

regulotor.

1 =

Idler

2 = Driving

3 =

Hinge

4 =

Hinge

5 =

Oscillating

rock

6 =

Shuttle

shaft

7 =

Slide

8 =

Shuttle

shoft

9 =

Shuttle

10 =

Shuttle

11 =

Shuttle

12 =

Bobbin

13 =

Take-up

14 =

Arm

15 =

Shuttle

connecting

rod

16 =

Needle

17 =

Needle

connecting

stud

18=Needle

connecting

link

19 =

Hinge

20 = Take-up

link

21 = Take-up

22 =

Needle

crank

pulley

shaft

crank

block

shaft

pulley pin screw

driver

driver race

case

crank

drive

bar

lever

bar

nsi

1 4 1

—

'-^1

\ 1

6 ;

Fig. 5 Shuttle

and

needle

bar

drive

1 =

Arm

shaft

2 =

Feed

cam

driving

worm

3 =

Idler

pulley

4 = Driving pulley

5 =

Feed

com

6 —

Worm

wheel

7 =

Bearing

bracket

8 =

Guide

plate

9 =

Slide

block

10 =

Hinge

screw

11 =

Feed

across

shaft

12 =

Feed

across

shaft

crank,

front

13 = Hinge stud

14 =

Guide

plate

15 =

Feed

across

driving block

plote

carrier

connection

Feed

regulator

plate

bar

across

16 = Feed

17 = Feed

18 = Ball joint

19 =

\ 1

Fig.6Feed

across

motion

(longitudinal

section)

] =

2 =

Roller

stud

3 ~ Feed across 4 = Boll screw stud,

5 =

Hinge

6 = Ball joint connection

7 = Boll stud,

8 =

Feed

9 = Feed across shaft crank,

rear

stud

across

regulator

lower

shaft

Fig.7Feed

The

groove

lengthwiseofthe

reciprocating

regulator has a slot

regulator

connectedbyo

regulating

the

effective

moved

possibletoadjust

bor.

on the

post.

screw.

armofthe

upward,

inside

machine

motiontothe

milled

Both

the

swivel

The

the smaller

the

amountoflengthwise

upper

across

motion

(cross

section)

face

of the

feed

cam

controls

bed.Aroller

fwo-ormed

into

its

feed

regulator

back

which

feed

side

and

ridesinthis

regulator

which

the

(Figs.8&9).

accommodates the feed

feed

regulator

(Fig.8)whichisheldinplacebya

this

swivelismoved

feed

regulator.

willbeits

And,

downward,

conversely,

effective

travelofthe

orm.

the

This

feed

the feed

groove

clamp

the

larger

device

plate

imparts

The

post

will

the

makes

carrier

motion

feed

are

and

swivel

Since

both

the

plate

carrier

bor

moved positively

work

and

from

clomp

and the feed plate are

the

workpieceisheldinplace

one

stitch

position to the next.

mounted

between

on the feed

these

parts,itis

1 = Feed

2 =

plate

Feed

across

driving

block

3 =

Slide

block

4 =

Feed

plate

carrier

bar

5 = Feed regulator post 6 = Work

clamp

7 = Feed regulator

swivel

8 = Swivel

9 = 10=Worm 11 =

Feed

Worm

clamp

cam

wtieel

wheel

12 = Driving pulley

Idler pulley Feed cam driving

worm

Arm

shaft

Feed regulotor

Fig.

8 Feed lengthwise motion (longitudinal section)

1 —

Feed

cam

2 =

Roller

stud

3 =

Roller

4 = Feed regulotor 5 = Bearing bracket

6 =

Slide

block

7 =

Guide

plate

8 ~ Feed plate

9 = Swivel

10 =

= Feed regulator swivel

12 =

13=Worm

14=Worm

Thumb

Feed

clamp

screw

regulator

wheel

post

shaft

15 = Feed cam driving worm

16 =

Arm

shaft

Fig.9 Feed lengthwise motion (cross section)

The adjustment possibilities inherent in the feed regulator and feed across

regulator ore not sufficient to produce larger tacks. Such tacks, however,

can be made with the aid of special organizational parts

which

provide for

a larger amount of work clomp travel lengthwise and ocross the machine bed.

Automatic

Stop

Motion

The machine is stopped automatically in order to ensure that all tacks will

be sewn with exatly the some number of stitches and that the machine will

always

be in the same

position

whenanew

needle

cycle

begins.

The

shape

of the pattern-forming groove and the gear ratio of the worm gear ossem-

bly are determined by the number of stitches per tack.

The automatic stop

rim of the feed cam

motion

(Fig.

is operated by the stop tripping segment on the

10).

When this tripping segment depresses the trip

ping lever, the latch at the lower end of the stop motion lever slips out of the

catch on the tripping lever so that the stop

motion

lever can be pulled against

the stop com by a tension spring. Shortly before the stop com has completed

its last revolution, the stop link hits its surface and snaps into its groove, there

by causing the machine to stop. To

thissudden stop, the Pfaff

3334

absorb

isequipped

the momentum of the machine at

with

double buffer springs.

Fig.10 Automatic stop motion mechanism

1 =

Stop

cam

2 = Hinge stud 3 = Stop motion lever 4 = Stop link 5 = Tripping lever 6 = Stop link rod

7 =

Latch

8 =

Catch

9 = Tripping dog

10 = Hand stop lever plate

11 =

Stop

tripping

segment

As the stop cam

end of the broke lever engages the face of the

lating port of the

makes

machine's

its last half

momentum

revolution,

the broke driving

before it isstopped.

At the same time, the belt shifter moves the driving belt

to the idler pulley (Fig. 11).

block

pulley,

from

at the top

thus

annihi

the driving

If trouble should occur while the machine is in operation, it can be stopped

instantly by depressing the hand stop lever (Fig. 10). This is important in case of needle or thread breakage.

Operative

1 =

Motor

2 = Motor pulley 3 = Driving belt

4 =

Belt

shifter

Thread

On and

Trimming Action

completion

bobbin

thread

of the

knives

position

sewing

which

Fig. n

action,

Machine

5 -

6 =

7 = Driving pulley 8 = Idler pulley

both

threads

are

located

Inoperotive

drive

Stop

motion

Broke

lever

are

under

the

position

lever

trimmed

needle

(idling)

by the needle

plate.

The motion which causes the knives to swing forward and catch the threads

emanates from the knife cam

bar

tripping lever

and

the knife

and

is transmitted to the knives by the knife

bar

(Fig. 12).

Fig.12 Thread trimming mechanism

bar

1 = Knife cam positioning flange 6

2 = Lifting lever 7

3 =

Knife

cam

4 =

Knife

bar

5 = Knife

The

needle

bar

tripping fork 10

and

bobbin

threads

are

Knife

Bearing bracket Ball joint connection

Locking lever

Bracket

cut when the left

tripping lever

treadleisdepressed.

A detailed description of the thread trimming action is given below:

While the last stitch is being made, the knife cam causes both knives to

swing

forward from the inoperative to the stand-by position.

motion

pulls

the tip of the needle thread knife catches the needle thread and

it onto the

back

edge of

its

blade

(Figs.

13 &

14).

The

During

bobbin

this

thread

Is caught by the bobbin thread knife in the same manner.

When the left treadle is pressed down, both knives continue to swing forward,

and

the

needle

tapering back

thread

edge

loop

and

of the respective knife and

the

bobbin

thread

are

cut.

are

pulled

onto

the

When the treadle is released, the knives return to the stand-by position where they remain during the first four stitches of the next tack. At the completion

are

of these stitches they

by the knife

cam.

automatically returned to the inoperative position

'/32"-Vl6"

7-8mm

Needle

Edge of

Bobbin

thread

knife

shuttle

knife

race

Fig. 13 Inoperotive position of knives

Needle

Bobbin

thread

Fig. 14

Stand-by

position of knives

18 19

23 24

26 27 28

Fig. 15

A = Starting lever F = Starting lever regulating nut B = Hand stop lever G = Thread

nipper

regulating screw

C = Feed across motion regulating nut H = Brake lever regulating screw

(Drops indicate oiling points]

Hinge

stud

2 = Face

7 8 =

10 11

—

20 21=Set 22

plate

Take-up Take-up

Needle

Needle Needle

lever link crank

bar

connecting link

bar

connecting

bar

frame

bar

Thread nipper rod extension

Thread Thread

Feed

nipper wiper

plate

Thread trimming mechanism

Needle

Knife

Bobbin

Shuttle

Shuttle Shuttle

Feed

Shuttle

collar

across

bar

race

race driver

driver

plate

case

ring

shaft

Ball joint connection

lever

wire

shaft

crank,

stud

front

Bearing bracket

= Feed

29 30

= Bearing bracket

45 46

regulator

Slide

block

Shuttle

driver

Oscillating

rock

Shuttle drive connecting rod

Hinge

stud

Stop

motion

Oscillating

rock

Tripping lever latch

Tripping lever

Hinge

stud

Felt

washer

Brake

lever

Hinge

stud

Stop

motion lever

Check

block

Brake

•

block

Brake regulating bracket

Positioning pin

Stop

com

Stop

com

spring

Driving pulley

shaft

lever

shaft

catch

shaft

crank

hinge

51 =

52 53 54 55 56

58 59

60 61

62 63

67 68

69 70 71

72 73

75 76

•

Thread

Arm

nipper

shaft

w/ position pin

hinge stud

53 52

48 47 46

18 19

59.60

Fig.16 D = Feed lengthwise motion regulating screw

E = Chain suspension hook

Work

clomp

foot

K =

pressure reguloting nut

(Drops indicate oiling points)

End

screw

Stop

motion

connection

w/circiip

bar

tripping

spring

bar

tripping fork

bracket

plate plate

regulator

across

shaft

across

shaft

across

shaft

lever

post

crank,

Locking lever

4 Spring suspension bracket

Boll joint

Washer,

7 =

Hinge stud

Bearing bracket

Knife

Stop link rod

Pressure

Knife

—

Position

Starting lever

Guide

Feed

Driving stud

rear

front

Feed

plate

w/position

Position bracket, front

Shuttle

race

Cylinder arm

Cylinder

Knife

Thread

Work

Thread

Clamp

Work

Presser

Lifting

Presser

Pressure regulating screw

Oil

Lifting bracket

Lifting lever

arm

bar

trimming mechanism

clamp

wiper wire

foot

clamp

bar

brocket

bar

tube

corrier bar.

ring

cap

spring

cap

foot

lifting lever

foot lifting stud

face

plate

lifting bracket

link

spring

guide

Hinge

stud

Top

cover

Thread nipper hinge stud

= Knife cam positioning flange.

adjustable

Knife

cam

Lifting lever

Ball joint

Lifting lever

Bracket

Belt

= Idler pulley

54 55

61 Ball joint connection 62

shifter

Driving pulley

Stop Hinge

Bracket

Bearing bracket

—

Feed

Work

Pressure spring

Swivel

guide

connection

extension

com

stud

regulator

clamp

37 36

27 26

23 22

Fig. 17

1 =

Needle

2 = Face

3 =

Take-up

4 =

Thread

5 =

Arm

6 = Ball joint

7 = Ball screw stud,

8 — Bearing brocket 16 =

9 =

Rollers

10 = Feed across

3 4

plate

tensions

shaft

lever

connection

upper

regulator

Feed

11 = 12 =

13 =

14 =

15 =

18 =

regulator

Worm

wheel

bracket,

Worm

shaft

front

wheel

Feed cam position stud 23

Shuttle

drive

rod Feed

Tension

Brake

cam

connecting

spring

block

shaft

bearing20

Broke

Stop

Stop motion lever

Ball joint Tension Locking lever

Lifting lever stop

Bracket

Bearing bracket

Knife

lever

link

connection

spring

bar

tripping lever

{Drops indicate oiling points)

16 17 18

29 = Knife

30 =

31 =

32=Knife

flange,

Worm

bracket,

Worm

cam

positioning

adjustable

wheel

rear

wheel

cam

shaft

33 = Lifting lever 34 = Hinge stud

35 —

Thread

nipper

rod

36 = Lifting bracket link

37=Presser

bar

bearing

Fig. 18

(Drops indicate oiling points]

-^38

-37

-36

-35

"34

"33

-32

-31 30

-29

-28

-27

-26

-25

-24

-23

-22

-21

-20

-19

Needle

Lifting lever

Worm

Lifting lever

Lifting

----

Boll

Presser

Bearing

Needle

Knife

Presser

Thread

Clamp

Knife

—

Shuttle

Bobbin

Ball joint

Thread

Hand Bearing

Hinge stud

Feed

Ball screw stud,

Feed

Tension

Worm

Thread tension, complete

Feed

Tension

Thread

Regulating screw

Take-up

bar

frame

guide

wheel

bracket

joint

connection

bar

lifting

Knifecam positioning flange,

bracket

bar

cam

bar

nipper

foot

lifting lever

bar

tripping lever

bar

tripping

bar

race

ring

driver

case

connnection

wiper

stop

lever

bracket

across

regulator

across

regulator

bracket

wheel

cam

spring

tension,

nipper nipper

lever

shaft

bearing

link

bracket

fork

wire

wing nut

upper

shaft

upper,

tripping

complete

segment

tripping lever

bracket

adjustable

B. Instructions

for

Repair

1. Disassembly

Strip the

intended. This rule applies particularly to dismantling the worm

bly.

plant.

machine

All

major repair and

only as far as is absolutely necessary for the repair job

conversion

jobs

should

be performed at the

gear

assem

Pfaff

It is advisable to strip complete ossemblies

and

reassembled as a unit. In

order

which

to avoid

can be easily disassembled

that

screws will be misplaced

or get lost, replace them in the screwholes immediately after the respective

port has been

removed,

if not

morked

previously,

spot the

positionofcranks

on shafts and the meshing teeth on both the worm and the worm wheel.

These

position

machine

To dismantle the machine completely, strip the ports in the following se

later.

marks

greatly facilitate the assembly and adjustment of the

quence (see illustrations on pages 24 through 29):

Needle, Work Clamp

Remove these ports first.

Stop Motion

Unscrew brake lever tension spring

Loosen

screw on stop motion lever hinge stud

Strip both the stop motion and broke levers, and dismantle

(22530).

Front

Ports

Turn out needle

on needle

bar

the machine cautiously. Dismantle presser bar

pressure regulating screw foot lifting lever

take-up

Feed

lever.

Cam

Unscrew wing nut

(22394),

pull out feed across regulator

wheel shaft

loosen

(22009),

and

Face Plate

bar

frame set screw

frame hinge stud.

(392),

(22861).

(701578)

binding

and

Unscrew

on boll screw stud of boll joint connection

screw

pull the feed cam off this shaft.

(9624)

and boll joint connection

(11126),

(700073),

Pull

needle bar frame and hinge stud out of

presser bar lifting bracket

thread wiper wire

(700297)

(22017).

on bearing

Unscrew hexagon nut

and push out this stud.

and loosen set screw

(6523)

with presser bar spring,

(22037), (22104),

bracket

(701638)

(22772).

locking

(700152)

and clamp

and strip

(21060),

on worm

lever

and

Knife

cam

Strip knife bar tripping lever

mantle

com

lifting

positioning

lever and knife cam (cautiously drive toper pin out of knife

flange).

(22239)

and lifting lever guide

(22004).

Dis

Top Cover Pull out thread nipper hinge stud

well as worm wheel shaft Feed Regulator Bearing Bracket

Take both set screws

loosen thumb screw

Pull

and

Cylinder

and

Worm Wheel Shaft Bearing Bracket

rear

(700252)

(700293),

(22332),

bearing

out of feed regulator bearing bracket

and

and unscrew top cover

bracket

move swivel clamp

(22016).

(22467)

(22333)

(21060),

downward.

bearing bracket to the right and up, end strip feed plate carrier bar

feed

regulator

Bed Parts

post.

Unscrew needle plate and shuttle race ring. Take out shuttle, and strip

shuttle race. Cautiously drive pin out of shuttle driver shaft crank

pull out shuttle driver shaft. Dismantle feed across shaft

Arm

Parts

Strip

shuttle

crank ond worm, slacken set screws

(21195),

points

Worm

Loosen set screws im worm wheel,

bearing bracket you drive out taper pin

drive connecting rod

(22059).

Loosen

(700150)

and cautiously drive out arm shaft, making sure its cranked portion

downward.

Wheel

Shaft

and

attach

(22016)

so that the worm wheel shaft

(1848).

Now

pull

worm wheel shaft out of

(22020).

set

screws

in arm shaft rear bushing

worm wheel shaft

will

(6568),

and

in needle bar

rear

not be bent when

machine.

2. Assembly

Examine

or replace damaged parts.

oil parts for wear before you assemble

Make

sure to

remove

them.

If necessary,

rework

burrs and dents on shafts

so as to ensure that gears, eccentrics, set collars and other parts can be

moved

are

on them

likely

eosily.

to cause

All

binding

shafts

and

must

be perfectly straight because bent shafts

noisy

running

of the

machine.Tofacilitate

subsequent adjustment, it is recommended to replace all parts in close

proximity to their previous positions.

Worm

Wheel

Shaft

Replace both the worm wheel and the worm wheel shaft. Again screw on worm

wheel shaft rear bearing bracket

when you drive home taper pin

Arm

Ports

Replace

arm shaft

with

driving

(1848).

pulley

(22016)

(20658),

so that the shaft

arm shaft rear

will

not be bent

bushing

(21195)

and worm. Push needle bar crank onto arm shaft, and screw down. Rotate

arm

shaft

to make sure it revolves freely. Mesh worm

and

worm wheel

accordance

with

position

marks.

Both

the

arm

ond

worm

wheel

shafts

must revolve freely, without having any end play. The only gears that may have a scarcely perceptible amount of play

are

the worm and worm wheel.

Place machine on

be too noisy, correct this condition by setting the worm as close to the

worm wheel as possible

hove any

end

pulley as close to arm shaft

screws securely. Re-ream pin hole with a

taper

pin to pin driving pulley on arm shaft. Make sure the

stand

play, drive

and

test-run it. If the worm

and

relapping

taper

rear

both parts. If the

(2056)

bearing as possible,

gear

arm

out

of the driving pulley, set

taper

reamer,

and

assembly should

shaft

should

and

tighten set

take

a thicker

taper

pin does

not protrude from the hub of the pulley, as this would interfere with the

proper functioning of the stop cam spring.

If a new arm shaft must be installed in the machine, drill the toper pin

hole in the driving pulley only

after

the

latter

has

been

mounted on the

shaft. The driving pulley is screwed onto the arm shaft only until the front

ports have been installed. Rotate the driving pulley on the arm shaft until

the groove in the stop com extends vertically. Check to see that the machine

stops when the ascending take-up lever has reached a position about

^Ua",

or 2.0 mm, below the highest point of its stroke. To make whatever adiust-

ment may be necessary, insert stop com spring, Novotex segment

and stop cam

Insert shuttle drive connecting rod

(20062)

into the driving pulley.

(22059)

and oscillating rock shaft

(20275),

(6674),

and check to see that both parts move freely without having any end ploy.

Mount thread nipper components in machine arm.

Front

Parts

Screw on needle plate, and odd take-up lever. Insert needle bor frame

with needle bar, and align so that needle is correctly centered in the needle

hole. Mount presser

Cylinder

Bed Ports

Insert feed plate carrier

to the feed plate carrier

without having ony lateral play. Screw feed across driving block

guide plate

parts

move

freely. Install

and rear cranks. Adjust the front crank so that driving stud

in the cutout of the feed across driving block when both feed motions

set on

zero.

Add shuttle driver

(22391)

bar

with guide, spring and pressure regulating screw.

bar

and

bearing bracket. Set guide plate as close

bar

as possible so that the latter moves freely

to feed plate carrier bar, making sure the attached

feed

across

shaft

with

set

shaft

with crank

collarsaswell as

(22025)

(6568).

front

is centered

and

are

Feed

Com

Attach feed cam,

and

tighten hexagon nut on worm wheel shaft. Make sure

the machine runs smoothly and the roller does not chafe

against

the bottom

plate

l"he

pattern-forming groove. Add feed across regulator, and screw feed

onto

feed

plate

carrier

bar.

prevent

loosen the set screws in the

by hand. This action will cause the rollers to

grooves automatically.

Knife

Attach bearing bracket for knife

the rollers from becoming

Com

bearing

bar

wedged

bracket,

tripping lever

and

odopt

in the grooves,

turn the driving pulley

the best position in the

(22239).

Push knife cam

again

with positioning flange onto worm wheel shaft, pin down, and tighten set

screws securely. Install knife

of rack and pinion mesh. Mount lifting lever

bar

tripping lever by means of ball joint connection

Stop Motion

Attach stop motion lever, brake lever, tripping lever, and locking lever.

Other

Ports

Attach remaining parts while you adjust the machine, or

has

been

completed.

3. Adjustment

To focilitate the use of this manual, all adjustments discussed in the follow

ing chapter,

and

Check-Up

wherever

for instance, all adjustments pertaining to the shuttle

the heading

"Timing

the Shuttle and Setting the Needle Bar at Correct

bar

(22088),

making sure that spotted teeth

(22003)

and connect with knife

(22512).

feasible, hove been grouped by

will

after

adjustment

assemblies.

Thus,

be found under

Height". For best results, it is recommended to perform the adjustment

and check-up of a machine in the sequence given below.

Important

Always

size in accordance with the material to be sewn. Unless specified otherwise,

insert a new needle before you adjust a

machine.

Select the needle

the adjustments discussed below apply to all subclasses. Certain materials,

however, necessitate minor deviations from the standard settings given here.

Timing

Insert a new needle,

the Shuttle and Settingthe Needle Barat CorrectHeight

and

screw on the needle plate. Loosen the set screw

in the needle bar frame, and adjust the latter so that the needle is centered

in the needle hole. (Needle plate inserts are available in various needle hole

sizes).

(1)

Needle

Bar Rise

The amount of needle mm. This means that the point of the shuttle should be opposite the center

bar

rise required to form the loop is

V35",

or 2.4

line of the needle when the letter has passed the lowest point of its stroke

V32".

and risen

viewed

rise can be set easily with the aid of

Make sure you turn the driving pulley counter-clockwise,

from

the

backofthe

machine.

gauge

The

correct

No. Z 70.67-2 (Fig.

amount

19}.

needle

bar

Fig. 19 Setting the

omountofneedle

bar

rise

To moke this adjustment, turn driving pulley to bring needle bar to its

lowest the

shuttle

the

gouge

and the

gauge,

position.

and

When

the needle has reached the

should

bottom

be at

its

left

point of reversal. Slip both the clamp and

onto the

tighten the clamp screw. To moke sure the needle

needle

bar,

of the needle bar

positioning

frame.

the latter

Push

the

lowest

clamp

point of its

between

up against the

barisat

the

stroke,

clamp

the

lowest point of its stroke, try to rotate the driving pulley,

and

check to see

that the needle bar does not move up and down. This done, pull out the

gauge,

the

or should be

and

cautiously turn the driving pulley until the clomp

needle

bor

frame.

When

in this position,

2.4 mm, from the lowest point of its stroke, opposite

the

center

line of the needle. If adjustment is required,

the

needle

bar

and

the point of the shuttle

bears

has

risen

against

V32",

loosen screws a (Fig. 20) in the shuttle driver, and rotate the shuttle driver

on its shaft, as may be required.

When

you retighten the shuttle driver

set screws, make sure the shuttle driver shaft has no end play.

Shuttle

driver

Shuttle

Fig.20 Shuttle driver mounting

(2)

Needle

When the needle

Bar Height

bar

has risen

V32"

from the lowest point of its stroke,

the point of the shuttle should be Vii", or 1.5 mm, above the top of the

(Fig.

21).

needle eye

beveled

edge

becouse this may result in skipping of stitches

Make sure the needle eye is not positioned below the

of the shuttle driver when the needle is at its lowest position

and

thread breaking (Fig. 22)

Fig.21Setting needle bar at correct height

Fig.

22 Setting the needle bar at correct height

adjust,

higheror

loosen

screw

lower,

as may be required

a on needle bar

(Fig.

connecting

22).

stud,

and set needle bar

(3)Setting

When the needle has risen

Needle

to Shuttle

V32"

should be a clearance of about

the point of the

shuttle.

This

settingispredeterminedbythe

shuttle race and cannot be changed

Shuttle

Needle

0,1

from the lowest point of its stroke, there

.004",or0.1

(Fig.

23).

mm,

between the needle ond

position

of the

Fig. 23 Setting needle to shuttle

The only way adjustment can be made is by exchanging the shuttle race.

Shuttle races

.012",or0.1, 0.2

recent machines, this adjustment

thickness.

(4) Setting

order

are

Needle

to avoid

available

and

to Shuttle Driver

that

for this purpose which

0.3 mm,

the point of the shuttle hits the

thicker

than

canbemadebyadding

the

ore

standard

.004", .008"

shuttle

spacers

needle

race.

of varying

if the

letter

and

is deflected by hard spots in the material, the shuttle driver has been design

ed as a

needle

guide. The needle should

bear

lightly

against

the shuttle

driver when the point of the shuttle passes it. If adjustment is required,

bend the shuttle driver coutiously (Fig. 24).

Needle

guide

Shuttle

Fig. 24 Setting

(5)

Clearance

The

clearance to permit the heaviest pass

through it freely. A

Between

gap

between

Shuttle

gradeofthread

normally will be sufficient for this purpose. To

and

Shuttle Driver

shuttle

clearance

needle

to shuttle driver

and

shuttle driver should be wide enough

used on this

obout

V64",

allow

used on this machine, it may be necessary to make this

0.6 to 0.7 mm,

wide.

driver

particular

machine to

or 0.4 to 0.5 mm,

heavier

gap

threads

about

to be

V32",

If adjustment is required, bend the driver fingers cautiously, making sure,

however, top finger is positioned exactly

(Fig. 25).

1 =

2 = Shuttle driver top finger

3 =

4 = Shuttle driver bottom finger

5 =

that

the bottom finger

Clearance

V64",or0.4 to 0.5 mm

opposite

Shuttle

lines up with heel of shuttle

(must not

gap

center of neck

driver

contact

shuttle

race)

Shuttle

does

opposite

not

contact

the

the shuttle

center

of the shuttle neck

race

and

the

Fig. 25 Clearance gap between shuttle and shuttle driver

Timing

the Feed Motion

Timing procedures apply to other subclasses accordingly.

(1}

The feed motion normally must not begin

the fabric, and must be completed when the needle enters the materiel

again. When extra-thick materials are being sewn, the observation of this

rule may prove impossible because the needle does not remain outside the

fabric shortly

ly.

point reaches the goods again. If the feed motion continues

has

feed

per

twice).

motions

To adjust,

rotate

tighten

the feed motion is explained with the aid of o subclass -2 machine

because the adjustment procedures can best be demonstrated here. These

Synchronizing the Feed Motion with the Needle Motion

until

the needle has risen clear of

long

enough.Insuch

before

the

Make

sure,

however,

entered

double-check

com

the

material

this setting, turn the

cam

makes

one

revolution,

This

is the only way to ascertain that the

involved.Ifthe

loosen

hexagon nut b

the

feed

cam

boththe nutand the

ascending

complete

for

again,

settings

cases,

set the

needle

has

risen

the feed

instance,

its

stud

motioniscompleted

needle

breakageislikelytooccur.

driving

revolution

should

(Fig.

(on

the needle

differ,

26)

and feed cam

shaft,asappropriate.

securely.

machine

so that it

clearofthe

pulley

by hond so that the

machines

cycle

making

will

setting

useanintermediate

position

After

starts

feeding

moterial

when

thus

is correct for all

complete

the needle

after

the needle

three

be repeated

bartacks

setting.

stud a, and

this

adjustment,

Fig. 26

Feed lengthwise motion

Wrong

The

feed

motion

not

completed when the

needle

enters

the

Hence,

flected

the

and

needle

breaks.

material.

is de

Wrong

The

feed

across

motion

not completed when the

needle

enters

the

Hence,

flected

the

and

needle

breaks.

materiel.

is de

Feed

across

motion

Right

The

feed

motioniscom

pleted when the needle

enters

the

material.

Right

The

feed

pleted when the needle

enters

motioniscom

the

material.

Fig.

27 Synchronizing the feed motion with the needle motion

(2)

Timingthe Feed Lengthwise Motion

When

the roller stud is positioned in the middle of the

in the feed

regulator A in Fig. 28), the elongated screws a

appropriate.

hole in the work

and

b (Fig. 28),

and

needle

the swivel must be centered in the feed

and

Wrong

clamp

move the

clampisat

its highest position (marked

feet. If adjustment is

bearing

bracket

forwardorbackward,

elongated

plate

needed,

hole

cutout or the

loosen

1 =

Feed

2 = Bearing

3 = Feed

4 =

Feed

5 =

Needle

6 =

Workpiece

7 = Adjust

8 =

Work

cam

bracket

plate

carrier

bar

plate

clomp

feet

Fig. 28 Timing the feed lengthwise motion

9 = Feed

10 =

Thumb

11 = Swivel

12=Thrust

13 = Feed

14 =

Feed

15=Roller

16 =

Pattern-forming

regulator

screw

clamp

washer

regulator

stud

post

swivel

groove

When the swivel clamp is moved down to position B, the feed plate should move the some distance from the middle both ways so that the needle will hit neither the work clamp feet nor the feed plate. Adjustment can be made by loosening nut c (Fig. 29) and moving the roller stud in the elongated hole of the feed regulator, as may be appropriate.

Wrong

« I

Wrong

Work

clamp feet

Adjust

Workpiece

Needle Roller

stud

Right

Fig. 29 Timing the feed

6 = Feed

regulator

7 = Bearing bracket

8 = Thumb screw for adjusting

the feed lengthwise motion

9 =

Feed

plote

10 =

lengthwise

Feed

motion

carrier

plate

bar

(3)

Timing the Feed Across Motion

The

amount

andisdetermined

For certain tack designs, the normal adjustment possibilities

of crosswise clamp travel varies with each subclass machine,

by the type of tack the machine is

supposed

are

not sufficient

to make.

so that the work clamp feet and the feed plate must be replaced by o set of

parts having a larger cutout. To

wing nut on ball screw stud 2 (Fig. 30),

across

feed

regulator, as follows:

Move it

toward

you to increase the feed across motion,

adjust

the

feed

across motion, loosen the

and

move the stud in the slot of the

or over from you, to decrease this motion.

Fig. 30

1 =

Feed

2 =

3 =

4 =

com

Ball

screw

Roller

Pressure

stud

spring

5 = Feed across

6 =

Work Wing

clamp nut

7 =

8 = Beoring bracket

9 =

Work

clomp

regulator

frame

foot

10 = Feed plate carrier

11 = Ball joint 12 = Feed 13 =

Feed

14 =

Feed

front

15=Ball

16 =

Feed

plate across

across

stud

across

connection

driving block

shaft

bar

crank,

As a result of this adjustment, the stitches are spaced farther

apart

packed more closely together, while the total number of stitches per tack

remains

unchanged.

If the

stitches

are spaced too for opart, the

tack

looks

ugly. And, conversely, if they are packed too closely together particu larly in leather or plastic material , the thread is

the material. To facilitate establishing the correct

likely

amount

to cut through

of crosswise

clamp travel, the adjustability of ball screw stud 2 has been limited to

suit the type of work being performed by a given subclass mochine.

Wrong

Needleisnot

platecutout. Adjustment required.

centered

feed

1 =

Work

clamp

2 =

3 =

Feed

Workpiece

plate

feet

carrier

4 = Feed plate

Wing

5 =

nut

6 = Feed across regulator

Fig. 31 Timing

bar

the

Right

Right-

plate

the

feed

and

left-hand

cutout

needle.

across

ore

7 =

Ball

8 =

Feed

9 =

Feed

crank

10 - Adjust

motion

endsoffeed

equidistant

screw

stud

across

shaft

across

shaft

from

front

Important

The right

and

left ends of the feed plate cutout must be equidistant from the

needle hole when the feed plate is at the extreme right or left of its throw.

Check

this setting for the largest and smallest amount of crosswise clamp

travel.

Wrong

1 =

Ball

2 =

Wing

3 = Adjust

4 =

Roller

screw

nut

stud

Fig. 32 Timing

the

5 = Feed across regulator

6 =

Feed

Feed Feed

motion

com

across

feed

7 = 8 =

across

shaft

rear

crank

To odjust, set the roller stud in the middle of the

feed

across

regulator

(Fig. 32). Loosen wing nut 5 (Fig. 31),

elongated

hole in the

and

move

boll screw stud 7 to its extreme left position in the slot of the feed across regulator (marked A in Fig.

amount

the right-

of crosswise clamp travel. Turn the driving pulley,

and

left-hand ends of the feed plate cutout

31).

The machine is now set for the largest

and

check whether

are

equidistant from

the needle hole when the feed plate is at the extreme right or left of its

throw. To adjust, loosen screws a

and

b on the feed

across

shaft

front

crank and adjust the position of the feed plate, as appropriate.

Move ball screw stud 7 to the right in the slot of the feed across regulator

as f»f as it will go, thus setting the machine for the smallest

crosswise clomp travel.

the driving pulley, check to see

This

position is marked B in

that

the short tack side is centered within

Fig,

amount

32. As you turn

the long tack side produced with the previous setting. If adjustment is required, loosen screws c and d on the feed across shaft rear crank, and

move the crank slightly to the right or left on the shaft until the correct

setting is obtained (Fig. 32). Again set the machine for the largest amount of crosswise clamp travel,

and check whether the left- and right-hand ends of the feed plate cutout

are equidistant from the needle when the feed plate is at the extreme right

or left of its throw. If necessary, adjust as instructed obove. Provided the adjustment hos been made conscientiously, tacks of all sizes

will be correctly centered in the feed plate cutout.

If the

small

tack

is positioned to the left of the center

line

of the large

tack,

move the feed across shaft rear crank slightly to the left. And, conversely, if it is positioned too far to the right, move the crank slightly to the right.

Fig. 33

The width of the tack can be odjusted within certain

stud f lengthwise of the feed across shaft.

c. Timing the Thread Trimming Action

(1)

Adjusting the Knife Bar

bar

The knife

carries an

position by two screws A

ed. The knife

bar

adjustable

(Fig.

forkatits

34)

and, hence, can be adjusted as may be requir

rear

is positioned correctly if there is a clearance of

limits

by moving ball

end

which is secured in

V32"

1 = Knife

cam

flonge

2 = Lifting lever

3 =

Knife

com

bar

4 =

5 = Knife

Fig. 34 Knifetripping mechanism

positioning

tripping fork

V32"-Vu"

6 = Knife 7 =

Bearing

bar

tripping

bracket

8 = Ball joint connection 9 = Locking lever

10=Bracket

{7—8

mm)

lever

Fig. 35

Inoperative

tionofknives

posi

Needle

Bobbin

thread

Edge of shuttle

thread

knife

race

Vu", or 7 to 8 mm,

between

the tip of the

bobbin

thread

knife

and

the

needle hole when the knife is inoperative (Fig. 35). Except when the machine

makes

the

last

stitchofo

tack

and

the

first

four

stitchesofthe

tack

the

knives remain at their inoperative position throughout the sewing cycle.

(2)

Knife Cam

Shortly

before

the machine stops, the knife com causes the knives to

swing forward from the inoperative to the stand-by position. At the same time, the needle thread loop formed during the lost stitch is pulled over the back

simultaneously by the tip of the

so that it is positioned in front of its cutting edge. The threads, however,

edge

of the needle thread knife. The bobbin thread is caught

bobbin

thread

knife

and

pulled sideways

are

not cut until the left treadle is depressed to raise the work clamp after the

machine has

stopped.

The knife com is screwed to a positioning flange and, hence, can be easily rotated on the worm wheel shaft.

turning the knife cam on its

shaft, the trimming action can be precisely synchronized with the needle

motion. The trimming action normally should stort when the needle begins to descend for its last stitch. (The

is 1:42).

gear

ratio between worm

and

worm wheel

Make particularly sure that the needle is not deflected by one of the knives

or even strikes them. Also

needle

thread

loop securely as the

been

made.

Take

care

knives

when

the

machine

that

the

makes

check

to see that the shuttle grips the

needle

ascends

needle

does

the

first four stitches of

not

come

after

the last stitch has

into

contact

the

with

the

next tack. If

the knife cam is designed to make more than one tack per revolution

(there ore 2-, 3-, 4-, and

6-cycle

cams), the

trimming

action must be

checked

for each needle cycle. If the settings should differ, use an intermediate

setting.

To make sure that the play

does not cause the needle to hit the

which

might be present in the

knives

trimming

mechanism

occasionally, turn the driving

pulley clockwise (as viewed from the rear), and see whether the needle

contacts the

bar.

knives.

If adjustment is needed, correct the setting of the knife

After the knives have been set correctly, depress the treadle to see wheth

er the

lifting

lever turns easily. As the treadle is depressed, the roller at the

top end of the knife bar tripping lever must snap into the depression in the

channel

With machines having different gear ratios,

minor

havinga1:28

ward to the stand-by position somewhat later.

trackofthe

deviations

gear

knife

from

ratio,

cam.

the above

for

instance,

setting

suchas1:21, 1:28,

maybenecessary.

the

knives

must

be set to

and 1:36,

machines

swing

for

d. Adjusting the

Adjust

the work clamp frame on the feed plate carrier bar so that the

needle

will neither be deflected by, nor strike against, the work

feet, regardless

Work

Clomp

how

large the tack may be.

The

work

clomp

spring

clamp

pres

sure can be regulated by nut h (Fig. 30). The clamp foot lifting lever (Fig. 2) must not contact the lifting studs pro

truding

will not press the material against the feed plate has completed the last stitch and stopped, adjust the presser

from

the work clamp face plate as, otherwise, the work clamp feet

firmly.

After the machine

bar

and the

clomp foot lifting lever so that the top edge of the latter is positioned

just below the work clomp foot lifting studs.

e. Timing the Stop Motion

(1) Stop Motion Lever

Adjust both the tripping lever latch so that the latch will leap about holfway into the upper notch of the catch

and

the stop motion lever catch

about

(Fig.36)

Hinge stud

Stop

motion lever

Stop

link

Stop

link rod

Stop

cam

Brake

lever

7 = Tripping lever

8 = 9 =

10 = Tripping 11 = Hand stop lever plate

12 =

Fig.36 Stop motion

Latch

Catch

Stop

dog

tripping

segment

when the right treadle is depressed to start the machine. Also see that

gap

about

^U*",

there is a clearance

edge of the stop

link

and the lobe on the foce of the stop cam

or 2.0 mm, wide between the front

(Fig.

when the machine is in operation.

Brake lining

Brake

block

Set

screws

Brake

lever

Lock

nut

Driving pulley

(stop cam spring housing)

Regulating

Hinge

stud

screw

36)

(0 0)

(

•

Stop Hinge

Stop

Brake

motion lever

stud

link

lever

block

Brake lining

Fig. 37 Adjusting the

brake

lever

Make particularly sure that the stop link snaps into the groove of the stop

cam freely. The tension springs must be strong enough to pull the stop

motion

and

brake lever assembly securely

against

the stop cam when the

machine stops. The stop link should be allowed only a small omount of

play in the stop cam groove. If the edges of the stop link or the stop cam are worn, these ports must be replaced instantly.

(2)

Tripping Lever

Adjust the height of the tripping dog at the front end of the tripping lever

so that the stop tripping segment on the rim of the feed cam will depress it far enough to ensure secure stopping of the machine.

Stop

Wrong

Fig.38 Stop tripping segment set too for ahead

so that stop motion is tripped too early

Wrong

Fig.

39 Stop tripping segment set too for back so

that stop motion is tripped too late

tripping

segment.

Tripping

dog

Tripping lever

Right

Fig.

40Stop tripping segment set correctly

(3]

Broke Lever

The brake mechanism serves to slightly reduce the sewing speed shortly

before

the

machine

stops.

Adjust so that the brake block is pressed

the

latter

has only half a revolution to go before the machine stops.

it has

stopped,

pulley by obout

a (Fig. 37)

appropriate.

1 = Lifting lever

2 = Knife

3 = Bearing

4 =

Bracket

5 = Boll joint connection 6 = Locking lever

7 =

Catch

8 = Lifting lever stop

check

whether

V44",

or 2.0 mm. To adjust, loosen brake block set screws

and

the lock nut on stop screw b

bar

tripping lever

bracket

Fig.41Adjusting the locking lever

the

brake

against

lever

the driving pulley when

can

be pulled

and

turn the

latter

away

from the

in or out, as

When

(4)

Stop Tripping Segments

Adjust the stop tripping segments on the rim of the feed cam so that the tripping dog at the front end of the tripping lever will hit the rim of the feed cam right behind the stop tripping segment when the machine is start

ed (Fig. 40). (5)

Locking Lever

The

locking

work

clomp

lever serves to

from

being raised inadvertently before the

lock

the

lifting

lever in position and prevent the

stitching

cycle

completed. In addition, it prevents starting of the machine before the work

clamp

has been

and

move

(6) Belt Shifter

lowered

onto the goods.Toadjust,

the catchat its top end to the right or

loosen

screwd(Fig.

left,

as may be required.

41)

After you have loosened the set screws, adjust the belt shifter so that the

belt

runs

in the groove of the

belt

shifter)

when the

pulley when the machine is about to stop

machine

driving

pulley

(without

chafing

against the

is started, and is securely shifted to the idler

(Fig.

11).

Starting

lever

Stop

motion lever

Regulating

screw

—/^--Sfop

Fig. 42 Adjusting the starting lever

(7)

Starting

There should be a clearance of about .04", or 1.0

of the stop motion lever

has

appropriate. A wider clearance

Lever

and

stopped.Ifadjustment

mm,

between the stop pin

the reguloting screw

{Fig.

42) when the machine

is required, turn the regulating screw in or out,

gap

would result in a greater delay when

depressing the treadle to start the machine.

Timing

(1) Thread

the Thread Nipper

Nipper

and

Adjusting the Thread Tension

The thread nipper should become operative when the machine has stopped

after having completed the last stitch. To adjust, loosen screw b (Fig. 44)

and set finger

(22335)

so that it is positioned as close to the near end of the

depression in the rim of the feed cam as possible when the machine stops.

When

engaged,

the thread nipper should exert just enough pressure to

permit the thread to be pulled through it smoothly. To adjust, loosen the

lock nut

and

turn

screw

a in or out, as

appropriate

(Fig. 44).

The

thread

must remoin

trapped

until the

needle

enters the material

again,

ot which time the tripping segment should release the thread nipper. As the

machine

makes

the

next stitch, the

thread

must be

trapped

when

the

take-up

Thread nipper spring

Needle

Fig. 43

bar

Right

Wrong

1 =

3 =

4 =

5 =

6 =

9 =

11 =

Thread nip

per tripping

lever

Thread nip

per

tripping

segment

Finger

Thread nip per

closed

Thread nip

per

open

Thread nip

per

closed

Thread

per rod joint

Threod

Thread nip

stud

Thread nip

Thread nip Thread nip

Thread

Thread nip

per

crank

per

hinge

per

rod

extension

per

lever

per rod

Needle

per

lever

per

spring

nip

bar

nip

Fig.44 Thread nipper mechanism

lever

has almost reached

the thread again after the needle has entered the goods.

To adjust, move the thread nipper tripping segment to or fro on the rim of

the feed cam, as appropriate. Thread nipper tripping able in different

Spore Parts Catalogue). The order numbers

No.

22504

If severol thread nipper tripping segments should be arranged on the rim

of the feed cam, repeat this adjustment for each segment.

The above setting applies to normal operating conditions. If materials and

threads of different weights ore used on this machine, minor deviations from this basic setting may become necessary.

Make sure the thread nipper lever does not jam and the thread nipper spring releases the thread completely when the former is at its inoperative position. The thread nipper spring should extend parallel to the flat spot

on the needle bar so that the thread

(Fig. 43).

The small prong of the thread nipper spring must project into the recess in

the needle bar so that the thread cannot slip out of the thread nipper

sewing.

lengthstosuit

its

No.

top

position.

machines

22504

tension

The

thread nipper

having

are

as follows:

No.

22454

will

should

release

segments

different gear ratios (see

]

not change

No.

while

are avail

22858

sewing

during

(2)

Needle

The Pfaff

The upper tension holds the needle thread taut while the threads are being

cut. Set this tension device so that it exerts just a light tension on the thread,

and the thread can be cut easily. If the tension is too light, the knives will

pull an excessive

will not be caught properly. If the tension is too tight, the thread will be cut too

early, leaving too short a

The

in the material. Begin by setting the

sion so that the stitchwill be pulled into the fabric properly.

Thread Tensions

3334

has two needle thread tensions

amount

lower, or main, tension holds the thread tout while the

thread

end.

(Fig.53).

through the tension

upper

tension. Then set the main ten

and

stitch

the

thread

is being set

The main tension remains inactive during the first four stitches of the tack

in order to prevent the fabric from being contracted while the first long

stitches are being sewn.

ally long starting

stitches

{This

applies only to bartacks made with exception

and on very thin fabric). The main tension remains

inactive also during the last stitches of the needle cycle so that an adequate

amount of thread can be pulled through the tension for the trimming ac

tion.

(3)

Bobbin Thread Tension

Set the

bobbin

thread

tension so

that

the

bobbin

thread

will be pulled into

the fabric correctly. Moke sure, however, that the tension is not too light as

otherwise

The neot oppeorance of the finished seam and its durability greoHy depend on the correct

regulation of tensions. The tensions ore correctly balanced if the needle and bobbin threads

interlockinthe

This The the

being

Goose:

Remedy; Increase needle

seam bobbin underside

formed.

Needle

bobbin

decrease

the

centerofthe

looks

thread

of the

bobbin

Fig. 45

ugly

pulls the

thread

bobbin

thread

material,osiliustroied.

and

is not

needle

fabric

as the stitch is

tension

too

tension

too

thread

will

Correct

durable.

thread

weak,

tight.

tension or

tension.

notbecut.

Tension

This The

the

formed.

Cause:

Remedy:

Regulation

seam

needle

surfaceofthe

looks

thread

Needle

bobbin

Decrease

increase

ugly

and

pulls the

fabricasthe

thread

tension

thread

tension

needle

bobbin

is not

bobbin

thread

duroble,

thread

stitchisbeing

too

tight, or

too

weak.

tension

tension.

(4) Lifting Lever

After the machine hos stopped, the left treadle is depressed to pull down

the lifting lever and raise the clamp feet. At the same time, the knife bar

is actuated

cutting position.

over the cutting edge of the needle thread knife

eously, the bobbin thread which passes in front of the cutting

bobbing

and

causes the knives to swing forward from the stand-by to the

thread

knife is pulled tout

This

action causes the needle thread loop to be pulled

and

be trimmed. Simultan

and

cut.

edge

of the

To adjust the throw of the knives, loosen screw C (Fig. 34) and move the

bracket on the lifting lever forward or backward. The setting Is correct if the tip of the bobbin thread knife is flush with the

edge

of the needle

plate when the lifting lever has been depressed completely.

(5) Knives

There

are

two types of knives with which the Pfoff 3334 can be fitted:

22452

22453

22096 22097

wide

Fig. 48 Knife styles

The

narrower

pulled from the spool while the last stitch is

will

amountofthread

ends

which

made.

The

the

knives,

the

thread

end

with which to

are

left

amountofthread

the

smeller

with

whichtostart

the

underside

with which to

start

will be

the

tack,

the

amountofthread

being

made,

and

the

tack.

The

the

shorter

fabric

start

the next tack must be long

when

will be

the

shorter

the

first

that

shorter

the

thread

stitch

enough to prevent the needle from becoming unthreaded when the first

stitch is made. Furthermore, it must be stitch will be formed securely. Knives Nos. 22096 quite

adequate

for this purpose.

adequate

to ensure that the first

and

22097 normally will be

1 =

Set

screw

2 =

Nut

Knife

holder

pinion stud

bracket

4 =

Knife

bar

rack

with

Fig,49 Marking meshing teeth on knife pinion

Changing

the Knives The knives should be machine is in

operation

sharpened

from time to time, particularly when the

costantly. To strip the knives, tilt the mochine

and

rack

over

to the left, resting it on the wooden peg. Open the cylinder bed cap.

loosen the nut on the knife pinion stud brocket set screw (Fig. 49), and take

out this screw. Next, remove the knife pinion stud bracket and the knife

assembly.

There is a possibility of gettingatthe knives without removing the knife

holder pinion stud bracket. To do this, loosen the small

hexagon

screw b

(Fig. 50) on the feed plate, and pull the feed plate up out of its mount.

After removing the four the trimming mechanism

are

The knives

out

this screw

by new ones.

secured to the knife

and

can

sharpen

needle

plate

set screws, both the

be pulled

the knives with a knife grinder, or

forward

carrier

out of the machine.

only by screw a (Fig. 50). Take

needle

replace

plate

and

them

Fig. 50

When you sharpen the knives, take

polished, but really sharpened, and that the tips

free from jags (Fig. 51).

In replacing the knives, make sure they fit in the knife

Changing

care

the

knives

that the cutting edge is not simply

are

well polished

carrier

and

groove

correctly. Then tighten screw a securely. The meshing teeth of both the rack and

the pinion

justed

after

assembly in the machine, simply reverse the

are

spotted (Fig. 49) so that the knife

the knife assembly has

been

replaced.

above

bar

procedure.

need not be read

replace

the knife

To ensure that the trimming mechanism will function correctly, coordinate

the functions of both needle thread tensions properly. The upper needle thread tension normally must be lighter, while the lower needle thread tension should be tighter.

Bobbin

Cutting

edge

thread

knife

Needle

thread

knife

Cutting

edge

Polished

Fig. 51 How to shorpen the knives

(6)

Adjusting the Stroke of the Thread Check Spring

The thread check spring performs the function of thread control, i.e. it

retains the excess

thread

which is

created

as the take-up lever descends

(but is not yet needed), and holds it back until the needle enters the goods.

The stroke of the thread check spring is checked by a stop and can be

adjusted by rotating this stop, as may be required. To do this, loosen the

set screw and turn the stop to the right or left, as appropriate.

The check spring is set correctly if it has completed taking up the balance

the

thread

when

the

needle

Needle

Size

stitches

Needle

Thread

Cotton

Silk

Weight

Nylon

Cotton

Silk

Nylon

Cotton

Silk

Nylon C

and

100/4

60/4

A & B

50/4

3 & C

into

Thread

Needle

the

Size

100

120

fabric.

Chart

Cotton

Silk

Linen

Nylon

Cotton

Silk

Linen

Nylon

Cotton

Silk

Linen

Nylon

Thread

Weight

40/4

C & D

80-90

36/3

60-80

30/3

60/3

4. Stitching-Off

After the machine has been adjusted, stitch it off carefully, in

able

to stitch off the machine correctly, ask your customer to submit a suf

ficient amount of fhreod

work.

a. Sewing

Thread

and

fabric as well as a specimen of the finished

The Pfaff 3334 handles all customary branded threads of

linen, nylon, etc.,

Select the

Needle

Insert the faces

toward

proper

needle

you.

without

needle

into the

any

and

thread

opening

difficulty.

from the Table on

of the

needle

page

clampsothat

59.

order

silk^

its long

to be

cotton,

groove

The Pfaff 3334 normally uses the following needle systems:

System 34 R (or

System 332R (or

LR)

for Model B machines,

LR,

D, etc.) for

Model

and

C machines.

System 34 needles can be used only for needle sizes up to No. 110 be

cause

all needles of a

care

Take

shear

might

that

the needle does not

off the thread. If System 34 needles should prove

larger

size (No. 120

enter

the fabric up to the shank as this

and

up)

have

a thicker shank.

too

short,

use system 31x1 or 68x13 needles. Needles of this System fit the needle

also

in sizes 120

the needle bar. If your customer

System 34 R

machines

needles.

Earlier

bar

feature

machines

for System 134

and

needles

a needle

(manufactured

and

130,

and

require

wants

canbereplaced

bar

which is fitted to receive System 332

up to April, 1954)

134-35 needles.

onlyaslight

vertical

to use needles thicker

by System 287

needles.

were

fitted with a

adjustment

than

No. 110,

All

Model

needle

(29x1)

bar

Fig. 52

c. Bobbin

Winding

Place the bobbin winder on the table so that its pulley will not contact the

machine belt when the winder is disengaged, and screw it down

The bobbin winder tension is

justed sideways to bring bobbin

two

screws

the

tension

Place a spool of

thread

arranged

and

bracket.

on spool pin 1

on the belt guard and can be ad

tension in line. To do this, loosen the

and

an empty bobbin on the

(Fig.

bobbin

52).

winder spindle. Lead the threod from the spool through thread guide 2

(from back to front), around and between tension discs 3,

and

down to

bobbin 4. Pull the thread through the slot in the bobbin, from the inside,

and

press in lever 5. Hold the

Having wound a few turns, break off the thread end

end

of the

thread

and

start

and

continue winding.

the machine.

The amount of thread to be wound on the bobbin is regulated by screw 6,

follows:

Turn screw right for more

left

for

less

thread,

thread.

Fig. 53

Needle

Pass the thread from the spool on the thread stand up

Threading

and

through thread

guide 1, through holes 2 and 3 of the spool pin, below thread guide 4, over

and from right to left around and between the tension discs of upper tension

5 and lower tension 6, as illustrated in Fig. 53. Pull the thread through the thread check spring, below thread guide 8, through hole 9, to toke-up lever

10, from right to left through the hole of the take-up lever, down and through

thread guides11and

from front to back through the

12, between thread nipper spring and needle bar, and

needle

eye.

Fig. 54

null

Threading

Place

pull the thread. Then

bobbin

the

into

Bobbin

the

draw

Cose

bobbin

the

caserothat

thread

into slot 1,

it revolves clockwise

and

pull it

under

when

you

the tension

spring into delivery eye 2. Moke sure the thread is drawn behind the prong

of the tension spring so thread

through

f. Inserting

the hole of position finger 3 (Fig. 54).

the

Bobbin

that

it will not slip out of the delivery eye. Lead the

Cose

In inserting the bobbin case, make sure the position finger enters the slot in the

shuttle race ring, and the loose end of thread does not

position finger

snap

into

and

place.

edge

of slot. Press

against

the bobbin

get

jammed between

case

until you

hear

Setting-Up

Individual

Power

Drive

If the machine is set up for individual power drive, power is transmitted

from the motor pulley to the driving

meons of a V32"-dia. round belt (Fig. 55).

and

idler pulleys of the machine by

power

Figs. 55 & 56 Pfoff 3334 set up for individual

drive

The electric motor driving the machine should hove a power input of

(0.25

kw)

and

operate

single-groove pulley having o

99032).

This pulley develops a sewing speed of

at 1,400 r.p.m. It should be fitted with a

diameter

of I'Va:", or 50 mm (Order No.

about

1,000s.p.m.

If, in exceptional cases, a high-speed motor operating at a speed of 2,800

r.p.m. is used, place o two-speed pulley, No.

31326,

between motor and

machine pulleys.

Electrical

information

Make sure the motor is properly connected to the power supply. When connecting a motor to a 220/380-volt, three-phase A.C. line having a working voltage of 380 volts (see electric meter), use the star connection.

The

delta

connection is used for lines having a working

volts. To change from one connection to the other, simply

voltage

rearrange

of 220

the

bridges on the motor terminal board, as illustrated in Figs. 57 & 58. Before

you connect a motor to another three-phase

A.C.

line (e.g.

127/220

volts),

make sure its working voltage is the same as the line voltage. The motor

pulley should turn counter-clockwise so that the belt rotates the machine

pulley at the top from the belt shifter toward the left, i.e. counter-clockwise.

reverse

the

directionofrotation,

2 X

V w

Fig. 57 Delta connection

simply

interchange

.Y, 2 ,

U V

Fig. 58

Star

wires R

connection

and

/fTJhTf

Connecting

the

Treadle

Chain

The longer chain serves to raise the work clamp. Attach the chain to hook

A on

lifting

leverB(Fig.

connectitto

front end of starting lever C

this, tilt

the

left

machine

59),

treodle.

back.

pass it

The

(Fig.

through

short

60)

and attached to the right treadle. To

the hole in the tabletop, and

chainishooked

into

the

holeotthe

Fig.59 Attaching the long chain

Fig. 60

Attaching

the

short

chain

Bench

Fig.61Pfaff 3334 set up on power benching

Power

Drive

Power is transmitted from o pulley on the line shaft

pulleys two-speed

No.

31321

pulley

and No.

assembly

31323

and thence to the large-diameter

No.

31326.

Mount

the

diameter pulley of the two-speed pulley assembly.

To obtain the rated sewing speed of

1,000

s.p.m.,

the line shaft pulley from the following table:

Line

Shaft

Line

Shaft

RPM

300 350 400

Speed

Inches

15V4

13"/32

ZVs

Pulley Dia.

Millimeters

400

350

200

(Fig.

61)

to two

jockey

pulley

driving

belt on the

small-

select the correct size of

Pulley No.

30637

30627 30553

Fig. 62 Individually

c. Individually Powered Machine on Power Benching

powered

machine on

power

benching

The Pfoff 3334 con be set up on existing power benching while being driven

by an individual motor. This arrangement (Fig. 62) is much more fovorable

than driving the machine from the line shaft. The special advantage of this

setup is that the

mochine

can be put out of operation, as may be required.

All that is required to drive a machine of this type is a short belt. Compared with line shaft drive, this belt con be mounted more easily and will hardly

slip.

A tabletop provided with the necessary cutouts

and

boreholes can be obtain

ed from Pfoff at extra charge.

Subclass

Parts which differ with each subclass

Form No. 10080, Subclass

essentially the feed cam, the clomp feet,

assembly has to be into

distributor.

Changing

Unscrew wing nut 6 (Fig 63), loosen binding screw 9,

across

another,

regulator

Conversion

exchangedinorder

it is

advisable

the Feed Com

5. Unscrew nut 4,

are

compiled in the Annex. (See also

Organizations

of the Pfaff 3334).* Such

and

the feed plate. If the worm

to convert

to ship the machine to your

and

pull

the

feed

one

subclass machine

nearest

and

cam

off its

parts

are

gear

PfafF

strip feed

shaft.

placing the new feed com on its shaft, make sure the rollers ride in the

pattern-forming grooves without having any play. Tighten nut 4, and check to

see that the rollers do not chafe against the bottom of the grooves (see clear

ance

marked "x" in Fig. 63). Ifthe roller in the

the bottom of this groove, place a

spacer

rear

between

groove

should chafe

the hub of the cam

against

and

the

positioning flange on the worm wheel shaft. If the roller in the front groove

should chafe ogainst the bottom of this groove, place a spocer between the

feed across regulator

1 =

Feed

cam

2 =

Roller

3 =

Roller

stud

4 =

Nut

and

its bearing bracket.

5 = Feed across regulator

6 =

Wing

nut

7 = Ball screw stud,

upper 8 = Hinge stud 9 = Binding screw

10 = Ball joint connection

11 = Boll

12=Feed

13 = Feed

rear

stud,

across

lower

shaft

crank,

Available in Germon only

Fig.63 Exchanging the feed com

Since minor deviations connot be entirely eliminated in machining the feed

cams, double-check the feed motion setting {see

poge

39).

The some applies to the adjustment of the thread nipper ond the

adjustment

procedure

stop tripping segments (see adjustment procedures on pages 53 and 52,

respectively),

Changing

the Knife Com

Take out screws a on the lifting lever guide and remove the guide, Then take

out screw b in the knife

bar

tripping lever bracket, and swing the lifting

lever away. Loosen screw c and drive out toper pin d. Remove the knife com with its positioning flange, and mount the new knife cam in reverse order

(Fig. 64).

1 = Lifting lever

2 = Knife

3 =

flange

Knife

cam

guide

positioning

4 = Knife

5 =

Knife

6 = Knife

cam

7 = Lifting lever

Fig. 64 Exchanging the knife cam

bar

tripping lever

bar

tripping fork

c. Changing the Work Clomp Feet

exchange

of their mount. Having attached the new feet, check to see that the needle

does

not

Changing

The

feed plate can be

attaching

pins exactly. If necessary, rework the holes with a reamer. Also moke sure

that

the

against it as

bend the feed plate slightly.

All

other ports

book.

the

strike

them.Ifit

the Feed Plate

the

new

feed

plate

this

which

work

clomp

does,

stripped

feed plate,

bears

would

retard the

may

feet,

check

against

take out set

adjust

after

to see that

the

feeding

the

taking

needle

screws

positionofthe

out the

its

plate

motion.Ifadjustmentisrequired,

have to be exchanged are

and

pull

work

clamp.

hexagon

holes

fit over the

lightly,

but

does

listedinSection

the feet out

screw.

When

position

not

press

Dof this

7. Trouble Shooting

a. Skipped Stitches

(1)

Needle

(2)

Needle

(3)

Needle

(4)

Needle rise timed inaccurately, or needle set either

too high or too low.

(5)

Shuttle set too far away from needle.

b. Thread Breaking

(1) For

(2)

Needle point blunt or worn, or burrs and sharp edges

(3)

Thread caught between tension discs or under bobbin case

tension

(4)

Poor or knotty

(5)

Thread tensions too loose or too tight.

c. Needle Breaking

(1)

Needle

(2)

Needle too fine for the fabric, or deflected by hard spots

in the material

(3)

Stop cam spring broken, causing irregular stopping of machine.

(4)

Knives

(5)

Machine

(6)

Needle not centered correctly in clamp feet cutout.

bent.

incorrectly inserted.

too

fine

for

the

thread.

anyofthe

needle

timed improperly, causing needle to strike knives.

plate.

spring.

bent.

feeds

causes

enumerated

thread

used.

and

struck by the point of the shuttle.

while

needleisdowninmaterial.

above.

d. Heavy Working

(1)

Lack

of oil.

(2)

Mechanism

{3}

Pieces

{4}

Belt

Irregular

(1)

Thebroke mechanism does not work properly.

adjust

the

that

machinetostop

If,

on the other

machinetomoke

tight.

(2)

Thestop motion mechanism is timed improperly.

adjust the stop

Moke

particularly sure that the stop

stop

cam

connects to the lower end of the

straighten the connection).

(3)

Stop com spring is broken or has lost its resilience.

powerful

absorb the momentum of the machine when it stops. Since this spring is

subjected to

and tear after prolonged use. If the stop cam spring has become ceable, this is indicated by the irregular stopping of the machine, i.e. the

needle bar is not always at the same position when the machine stops.

replace a

65),

take out the hinge

connection,

strip stop motion lever p and brake lever

Next,

take

and the

component

Insertion of a new stop cam spring is greatly facilitated by the use of a

special

spring,

a. Place one

b. Insert new stop cam spring.

Insert rotate the

clogged by inferior lubricants.

of thread

too long ortensioned improperly.

Stopping

the

broke

brake

lever

too

[ommed

mechanism,

tension eorly,

hand,

the

one extra

motion

in shuttle race.

proceedasinstructed

springisnot

particularly

tension

stitch,

springistoo

particularly

mechonism,

motion

freely.

(Check

to see that the

locking

springishousedinthe excessive

broken

loosen

out

broken

parts.

wrench

proceed

check

punch

pulley

stress,itmay

stop cam spring,

screw

connecting

screwK(Fig.

the

four

screwsb,strip

stop cam

which

as follows:

spring

is available under No.

block

(Fig.

67)

D into hole 1 of the

until

the

punch

lose its

66),

(Fig.

on the stud in the stop cam spring housing.

driving

too

strong,asthis

when

the

driving

when

proceed as

lever

snaps intothe groove on the

ball

joint

lever

(22530)

hollow

driving

resilience

remove

pull

65).

tension

the

locking

out hinge stud Q

cap

ringA,and

Clean the

20057-1.

on page

weak,

the

instructed

connection

does not jam. If it does,

pulley

or break by fair wear

springs

lever

spring

51.

Take

might

beltisa

this

driving

little

may

belt is rather

on poge

(22772)

and

N and O

with

the boll

(Fig.

remove

stop

housing

To insert the new

pulley,asshowninFig.

bears against the left bearing

cause

serves

unservi

65),

and all

67. bracket.

care

slack.

which

(Fig.

joint

and

cam

Then

the

49.

Fig,

65 Stripping the stop motion and broke levers

d. Place check block U on the stud of the wrench, and push the wrench onto

the end of the orm shaft, as shown in

bears against the hub of the

the Novotex segment con be placed between both

While

holding wrench flat

Grease the stop cam spring lavishly before you replace the stop cam.

with

(long)

Having

the

stop

groove of the

stop motion

Moke

sure the brake

the driving pulley with sufficient pressure as the machine stops.

the segment in place

the

palm

of your left hand so that it

sides of the

check

replaced both the stop cam and the cap

cam

and see that it does not

driving

and

brake

pulley

levers.

lining

driving

blocks

and turn it

on the brake

Fig.

67, so that the hub of the wrench

pulley.

Now

depress

check

with

your right hand, press against the

will

not

the

blocks.

slip.

wrench

Moke

face toward the segment and the

ring,

check

the

resilience

jam.

(Insertasturdy

counter-clockwise).

block

engages the brakingsurfaceof

screwdriver

Then

mount

until

sure the

spring.

in the

the

Fig. 66

Fig. 67 Inserting a new stop cam spring

Machine

a. Cleaning

Core

and

Oiling

Careful cleaning and regular oiling increase the service life of the machine

and

ensure smooth running.

When

the machine is delivered to the customer, all polished

parts

are

covered

with a rust-preventative grease. Remove this grease, together with the dust

which has

accumulated

in transit,

before

you put the machine in

operation.'

Also, squirt an ample amount of oil into all marked oiling points, unthread

the needle,

into all the bearings. All important oiling points Figs. 68 through 70,

these oiling points

take

out the bobbin case,

and

by drops in Figs. 15 through 18. Wherever feasible,

are

marked

with red

and

run the machine to work the oil

are

marked by arrows in

paint

on the machine.

To get at the oiling points in the cylinder arm and the machine base, tip the

(Fig.

belt guard bock, loosen wing nut D

machine

over

to the left,

and

rest it on the

60), swing away catch E, tilt the

wooden

peg.

When the machine is in operation continuously, form the habit of removing

the lint which has

accumulated

in the vicinity of the shuttle,

and

putting a

drop of oil into the shuttle race. Repeat this procedure several times a day. Run

the mochine with a scrap of material under the work clomp to absorb

all

excess

oil.

Fig. 68 Oiling points on the back side of the machine

Fig. 69 Oiling points on the mochine arm

Fig. 70

Oiling

pointsonthe

top

cover

and

frontofthe

machine

Certain sewing troubles, such as skipping of stitches or thread breaking, can

not be remedied by lavish oiling.

soil

the

workormix

with

the

dirt

Excessive

and

lintinthe

quantities of oil are liable to

machine

and

cause

hard

run

ning. Therefore, oil sparingly, but regularly!

Pfaff sewing machine oil is non-resinous ond has the right lubricating pro perties for this machine. For this reoson, use no other oil in this machine,

b. Dismantling the Shuttle Race

If the machine is in operation continuously, clean the shuttle race from time to

time.

To dismantle the shuttle race, see that the machine is in the regular stopping

position. cylinder

bobbin case and the bobbin. Take out screws h and I

Then

tilt it over to the

bed cap, press

down

left,

and

resting

pull

it out of the

it on the

wooden

machine.

{Fig.

peg. Open the

Remove

71), strip shuttle

the

race ring d, and take the shuttle out of the shuttle race. Take care that the

springs on screws h and i do not get lost.

The shuttle race proper need not be stripped for cleaning. Take a pair of

tweezers and remove pieces of thread that have accumulated in the

area

behind the shuttle race. Then, with a toothpick or similar wooden object,

clean

the shuttle race.

To assemble the shuttle

Never

use a metal tool for this purpose.

mechanism^

reverse the above procedure.

Fig.71Dismantling the shuttle race

Electromagnetic

Genera)

a. Brief Description

InformaHon

Control

Lifting the work clomp or starting the machine previously required a con

siderable

working

the output, electromognetic control has now been introduced. On a

fitted with an X35 or X45 device, all the

is to tip on a push button (FS in Fig. 4), which is provided with two switch posi

tions. Actual work is then performed by solenoids HM

former

Since both solenoids

is either single or

in the circuit.

plied lo the rectifier which instantly raises the work clomp.

amountofenergy

cloy,

To reduce the physical strain and, at the same time, increase

on the port of the

operator

has to do to start the machine

and

serves

lo raise

three-phase

When

and

lower

operate

A. C., a rectifier (GL in Fig. 72) has

motor

M is switched on,

the

work

clomp,

the

latter

starts

on D. C., but the current locally available

current

is simultoneously sup

in an

EM.

the

been

overage

PfafF

3334

While the

machine.

placed

Fig. 72

Key

to Symbols Used

Symbol

Si Fuse; 0,5 A;

*) Please

state

voltage

Nomenclature

Master switch (triple-pole switch)

Rectifier

Electric motor;

permanent

duty; 1,400 r.p.m.

Starting magnet, TGB 9; 25% ED; 180 =

Clamp

lifting

magnet,

180V

Foot

control

switch

Switch

U 1 R

Spark

suppressor

Switch, Gusspilot

TGB 12;

D 6 U 1 P

GAl

100%

ED;

FNK3

Sewlight transformer, 220/12 V, type A VisVA

on your

orders

Order

97064

97080

98211

97260

97263

97162

97160

No.

98214

97104

98076

Operating

Instructions for X35

and

X45 Devices

a. Turning on

Motor M starts running. Since both switches, current flows to clamp lifting magnet HM (Circuit

attracted

b. Inserting the

(1st Switch Position]

Insert fabric

action, circuit I is

result, the work clamp is lowered

If it should remove your

and

become

Master

Switch HS

and

ES,

are closed,

I).

As a result, the plunger is

the work

Work

and

foot

clamp

raised.

and

Operating

Foot Switch FS

depress foot control FS to the first switch position. By this

opened

from the control. As

and clamp lifting magnet HM de-energized. As a

onto

the work by spring action.

necessary to reposition the work in the machine, simply

foot

control FS returns to its normal

position, it again closes circuitI.As a result, clomp lifting magnet HM is

energized

c. Starting the Machine by

Press action closes circuit magnet

and

the work

(2nd Switch Position)

foot

control FS all the

IIinthat

EM is

energized

clamp

raised.

Operating

current flows through switches FS

and

Foot Switch FS

way

down to the second switch position, This

starts the machine only

ofter

and

the

SS. Electro

plunger

clamp lifting magnet HM has dropped bock and thereby has closed switch SS.

d. Sewing Cycle

and

Automatic Stopping of Machine

Releose

Immediately on starting the machine, lever B presses

opens

rupted raised inadvertently while the machine is in

foot

control

FS.

it. As a result, the flow of current to clomp lifting

a second

point

in the circuit

and

the work clamp kept from being

operation.

against

magnet

switch T

HM is inter

and

On completion of the sewing cycle, the machine stops automatically. At the

same

time, switch ES is closed so

clamp

lifting

magnet

As a result, the work

The

work

canberemoved.

clamp

is raised

that

current flows through switch FS to

and

upper

and

lower

threads

trimmed.

HM--

EM-

Fig. 73

Wiring

Diagram

Fig,74As

the

machineisstarted,

opens

switchESand

magnet

HM.

leverBpresses

interrupts

SwitchESremains open throughout the sewing action.

the

against

flow

of current to

roller

Rand

clamp

thereby

lifting

Fig.75Plunger

the machine by means of a chain.

Switch SS, which is actuated by plunger Z of electromagnet HM, per

mits

starting of the

lowered onto the goods completely.

Z of solenoid

is connected to the

machine

only after the work clamp has been

clamp

lifting

lever of

Fig.

76 PlungerZ, or starting magnetEMis connected to starting lever E by

means of link N. When solenoidEMisenergized, plunger Z pulls down

lever E and thereby storts the machine.

3. Working of Device

Master

Switch

Upon turning on master

storts running. At the some time A. C. flows through terminals 5

and 2 to the reectifier. As the rectifier starts operating, it closes aD.C. circuit

from

its positive pole through terminal 9, the coil of clomp lifting magnet

HM, terminals 12 and 14, switch FS, terminals 3

nals 7 and 8 to the negative pole. The work clamp is raised.

Foot

Switch

depressing foot controlFSto the first

under a) above is interrupted. Clamp

switch SS closed and the work clamp lowered.

Solenoid

depressing foot control

Simultaneously a circuit is closed from the negative pole of the rectifier

through magnet

magnetisenergized

switch

FS,

EM,

terminals 9 and 10 to the positive pole. As a result, the starting

switch

terminal

and

starts

HS,

the motor is connected to the supply and

and

4, switch ES,

switch

position, the circuit discussed

lifting

all the way down, the

13,

switch

SS,

terminal

the

machine.

magnet

is de-energized,

machine

11,

the coil of starting

and6,and

and

termi

is started.

R S T Mp

Fig. 77 Wiring

Diagram

Solenoid

and

Switch

Foot controlFSis released. To ensure that clamp lifting magnet HM will re

main inoperative while sewing, the circuit discussed under a} above is inter

rupted by switchESas long as the machine is in operation.

The two spark suppressors

FL,

which

are connected between terminals 8,

and 12, protect the contact points against excessive voltages. If, on special

request, the machine is equipped with sewlight transformer

suppressors

Switch

are

connected to terminols 1

and

LT,

the spark

The function of switch SS is to interrupt the flow of current to machine

starting magnet

for the short period of time it takes to lower the work

clamp onto the work. This prevents the machine from being started by quick

ly depressing foot control FS before the clomp has been lowered completely.

Switch SS closes the circuit to starting magnet

only after the plunger in

clamp lifting magnet HM has dropped back (that is, when the clamp has been

lowered completely).

Fig. 78 10 mm =

mm="/as*

'V32"

Fig. 79 12 mm = 'V32'

mm="/az''

4. Mounting

Switch

Attach

previously, drill screwholesinthe positions indicated in

ore

provided with

Lever

cent

machines

two

fillister

Solenoid

and

switchESto

machines,

are so designed that the

head

screws.

Adjustment Procedures

bearing

bracketofstarting

lever.Onmachines

Fig.

appropriate

holes.

leverBshouldbemountedasshowninFig.

lever

con be

easily

supplied

78.

Recent

machines

screwedonwith

79.

Connect starting magnetEMto link N on starting lever E by means of a bolt. Press

starting lever E all the way down and adjust magnet

until

its plunger

is in a vertical linewith link N.Mork position of magnet on underside of table-

top

and

secure it in position with four

wood

screws.

Fig. 80

Switch

SS which is attached to clomp lifting magnet HM can be mounted

without any

difficulty.

Check

whether it is closed when the plunger has

dropped bock, and open when the plunger is attracted.

Solenoid

Switch

without any

ped back,

SS which is attached to clamp lifting magnet HM con be mounted

difficulty.

and

open when the plunger is attracted.

Check

whether it is closed when the plunger has drop

No special instructions are required for mounting the remaining parts of the

electromagnetic control mechanism. Merely take

convenient to

diagram).

operate

and

thot the wiring is clearly arranged. (See below

care

that the mechanism is

9's«a

Fig. 81

After all the components hove been secured in place, make the following

adjustments:

andb)above

There

should

beaclearance

about

Vta" -

between

rollerRand

lever B when the machine has stopped. If adjustment is required, either loos en the two screws of lever B and adjust lever, or turn screw d and thereby

adjust roller. (See Fig. 82.)

Fig. 82

above

When the machine Is inoperative, there should be a clearance of

764"

between starting lever Eand brake lever H. To adjust, turn screw G in or

out, or reset fork J. (See Fig. 83).

=sq5

about

ande)above

The chain should be slack throughout the sewing action. To check this, proceed

follows:

Turn the machine by

hand

o full cycle

and

see

whether

the chain is slack

all times. The chain must not be too loose, however, as otherwise the upward

travel of the

magnet

plunger

would be shortened.

If adjustment is required, set fork J either higher or lower.

Apart from the X35and X45electrical devices discussed above, the Pfaff

can be fitted with an X38 or X39 device (foot-operated and knee-operated

presser foot lifter, respectively).

Machines

equipped

with

the latter two devices

3334

ore set up in pairs in "V" tandem arrangement on a twin power toble.

Subclass

Information

The standard

range of tack designs differing both in shape

per tack. There is a special subclass

desired.

Pfoff

3334

has been adapted to produce a vastly diversified

and

in the number of stitches

machine

available for any tack design

The various subclass machines differ in the design of the feed cam, the

knife com, the clamp feet, and the feed plate. In oddition, each subclass

machine

usesa differentgear ratio inthe

worm

gear assembly.

All requests of our customers for the development of additional subclasses

capoble of performing special non-standard operations will be given our

careful

consideration.

Instructions for converting one subclass into another are given on page 69.

Listed in the following Tables

1. Subclasses having the same

2. Subclasses having the

same

are:

gear

knife cam

ratio

3. Subclasses requiring additional parts

(marked with an asterisk in Tables 1.

and

2.)

4. Principal parts varying from one subclass to another

5. Special

6. Tack designs

stitches

available

organizational

arranged

for

each

and

the

dimensionsofeach

ports

by shapes. This table offers a survey of the variations

basic

tcck

design,

tack.

and

indicates

the

total

number

Conversion of machines

and

cam is the

feed

Conversion

mochines worm wheel have to be exchanged. (It is best to hove your

one

subclass machine into

have

the

same

gear

require no

additional

cam, work clomp feet,

one

subclass

have

different

gear

another

takes very little time if both

ratio. If both machines have the

conversion parts, all

and

feed plate.

machine

rotios

into

because

another

in this

that

has to be

takes

case

both the worm

same

knife

exchanged

timeifboth

nearest

Pfaff

representative perform this conversion job for you.).

If the machine is to be fitted to moke a different size bartock (within the dimensions given in the tack design diagrams), a matching feed work clomp feet

have

to be fobricated.

plate

and

1. Subclasses Having the

c L I

Subclass

-9,-14*,-23*,-51,-71/2,-129,-158,-168,

-200, -205

Same

Gear

Ratio

Gear

RQfiQ

1:21

Worm

...

Worm

Thread

Nipper

Tripping

Segment

22143 22142 22

-5/2*,-130,-146,-160,-176,-177,-178*,-214 1:24 24016 24017 22505 21

-5/3*,-22, -24/1,-25, -27, -32, -41, 1:28

-75*,

-82*,

-103*,-112,

-166, -173, -180, -196, -210, -216, -232

-113,-

126, -128, -134, -141,

-91, -93, -94,

-95/2,-98,

268

269 22504

505

-28/5,-58, -68, -69, -73, -77, -81, 1:32

232

233 22 504

-101, -110, -127, -131,-153, -165, -172,

-181, -182, -185, -208, -213, -218, -234

-7, -8, -28/1,-62*, -71/1,-95/1,-196, 1:36 22212 22213 22454

-121*,-123, -138, -154, -155, -157, 167,

-174, -179, -199, -209/1,-209/2,209/3,-217,

-233

-1, -2, -3, -4,

-11, -12, -13*, -15, -16, -17, -18*,

19*, -20, -21, -26,

-29, -30*, -31, -33*, -34*, -35*, -36,

-38/1,-38/2,-39,

-37*,

.45,

-46*,

-49,

-55, -57,

-64, -65, -66, -67, -70, -72,

-76, -78, -79*, -80, -83, -85, -86,

-87, -88*, -89*, -90, -92, -97, -99,

-100*,-102,

-119, -124, -125, -132, -135, -136, -139,

-142, -147, -149, -150, -151, -152, -156,

-159, -162, -163, -164, -169, -175, -183,

-184, -186, -187, -191, -193, -201, -202,

-50, -52, -53, -54,

-59/1,-59/2,-59/3,-61,

-107,

-108,-114,

-203, -206, -207, -219, -220/1-10, -236

-188

-24/2,-48*, -56*, -84*, -96*,-104*,-111*, 1:56 22 574 22 575 22 858

-115*,-118*,-122,

-189, -190, -192, -194, -195, -198, -212,

-215, -231

-137, -140, -148, -161,

-5/r,-6,

-28/2*,28/3,-28/4,

-40, -42, -43,

-10*,

-63, 1:42 21 023 21 024 22 454

-74,

-116, -117,

1:48

842

843

—

-44*, -47*,

.143,

-211, -235

-60*,-105*,-109*,-120*,-133,

-144, -145, -170, -171, -197, -204,

Note: Machines which have a

1:48

and

are

nearest

to be converted to 1:56

Pfaff

agency.

* These

subclasses

1:72

gear

rotio of 1:21, 1:24, 1:28, 1:32, 1:36, 1:42 and

require

addiliorta!

22 694 22 695 —

and

1:72 must be shipped to the

parts

(see

Table

3).

2. Subclasses Having

Gear

Ratio

One-Cycle

the

Same

Knife

Two-Cycle

Cam

Knife

Com

Three-Cycle

Cycle

Six-Cycle

1:21 -9, -14*, -23*, -129

1:24

1:28

1:32

1:36

-51, -71/2,-158,

-168, -200, -205

-5/2*,-130,

-176, -177, -178*,

-214

-5/3*, -22, -24,

-25, -27, -32,

-41, -82*, -91,

-93, -94, -95/2,

-98, -103, -113,

-126, -128, -134,

-141, -166, -173,

-180, -196, -216,

•232

-28/5, -68, -69, -58, -73, -127,

-77, -81, -101, -172

-110, -131, -153,

-165, -181, -182,

-185, -208, -213,

-218, -234

-8, -71/1, 95/1*, -62*, -167 -7

-106,

-138, -154, -155,

-157, -174, -179,

-160, -146

-121*,-123,

-75',-112,

-199 -28/1

-210

-209/1,-209/2,-209/3,

-217, -233

-2, -3, -15, -1, -4, -5/1*, -10*, -19*, -21

-16, -17, -20, -6, -11, -12, -28/2, -28/3,

1:42

1:48

-30*, -33*, -34*, -13*, -18*, -26, -29, -38/1,

-37*, -43, -46,

-55, -59/1,-59/2, -36, -39, -40, -45, -97,

-59/3, -66, -67, -49, -50, -52, -163, -186

-70, -72, -76, -53, -54, -57,

-79*, -83. -86, -61, -63, -64,

-87, -88*, -89*, -65, -74, -80,

-90, -92, -99, -85, -102, -108,

-100*,-107, -114, -119, -124, -135,

-116, -117, -125, -142, -147, -175,

-132, -136, -139, -184, -193, -219

-149, -150, -151,

-152, -156. -159,

-162, -164, -169,

-183, -107, -191,

-201, -902, -203,

-206, -207, -220/1-10,

-236

-188

-28/4,-31,

-35*,

-38/2,-42,

Geor

Rafio

One-Cycle

Knife

Two-Cycfe

Cam

Three-Cycle

Cycle

Six-Cycle

1:56

1:72

-48*, -56*, -84*,

-96*.-104*,-111",

-115*,-118*,-148,

-161, -189, -190,

-192, -194, -195,

-212, -231

-47*,

-60*,-109*,

-133,

-144, -145,

-170,

-171, -197,

-204, -211, -235

3. Subclasses Requiring

Subclass

-5

-10,

-13, -14, -18, -19,

-33, -37,

-18,

-47, -48, -56, -60, -79,

-82, -84, -88, -89, -96,

-104, -105, -109,

-118, -120

-95/1,-95/2,121

-23,

-30, -34, -44,

-111,-115,

-24/2,-122,

-140, -198,

-44*, -105, -120*,

-143

Additional

Work

One

Parts

clamp,

work

ing lever No. 22289;

Bearing bracket No. 22413

No.

22460

-137,

-215

clomp,

Addifional

complete

complete,

and

work

Parts

and

each;

clomp

feed

clamp

stop

regulator

foot

lift

No. 21146

-30, -34, -35, -60, -84,

-88, -96

-44,

-120

-62, -75, -103

-46

-60,

-84,-100,-179

Clomp foot lifting lever No. 22859,adjustable,

replacing

Clamp

foot

Clamp

foot

Nos, 22410

foot

lifting lever No. 22790, work clomp

bracket

No.

foot

lifting lever No. 22604,

No.

22785

22599

and

22314

work

clomp

Clamp foot lifting lever No. 22859, work clomp foot bracket No. 22570, complete

Tripping lever No, 22700,

Feed plate carrier bar No.

Slide block No. 22722, for

complete

22720,

feed

plate

complete

carrier

bar

4. Principal Paris Varying from

Feed

cam

One

Subclass to Another

Knife

com

Feed

plate

Worm

Work

Worm

clamp

wheel

foot,

left

Work

right

clomp

foot,

22146

5. Special

Organizational

Parts

21148

22289

22263

302

22264

Subclasses

437

22266

-10; -13; -14; -18; -19; -33; -38

700252

28200

685

Subclass

267

Subclass

701

-4

042

-5

21153

578

22197''14

324

22294

22193/94

701

22197x

046

22683

22 200

complete

22682

24006

Subclass

Subc

ass

-10

-14

-18

22220 complete

22229 complete

22221

22222 22224

22302

22300

22301

22342

22224

mmanmiiimTnii

Subclass

22370

481360

complete

-19

22369

complete

22340 complete

481 350

complete

Subclass

-33

22434 complete

22435

22436

Subclass

22361

-"33;

-37

complete

Subclasses -18; -23; -30; -34; -44;

-47; -48; -56; -60; -79;

-82; -84; -88; -89; -96;

-104; -105; -109; -111;

22413

-115; -118;

complete

-120

22460

22437

22297x32

Subctosses -46; -62; -75; -103

22604 complete

22599

complete

Subclasses -30; -34; -35; -48;

•60; -84; -88; -96

410

6. Tack Designs

ArrangedbyShapes

-28/1

-21

-137L

-51

,.,s

-28/2 -28/3 -28/4

-52

-10

- t

-112

-14

—;;2

•199

-lO-X

—

-163

•9

86 -129

-18

M-lt

-122 13

-119

•

f'O

•

-19

-it-t)-

-95/1

-95/2

-28/5

-172

—

»-«

_-98-128_

28:28

•75

-62

I i

-7

-103

5/2 -5/3

-50

-31 -173

-46

-65 -80 -33

-41

WVNMI

^A/VWWWvVft

-121

-1«£L

-210

m^hN\

-86

Pfaff 3334 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual