WIA Weldarc 280 Workhorse Owner's manual

1

WELDARC

2

8

0

''WORKHORSE

I'

(

MC

77

)

"""""""""""

8/79

THE INFORMATION CONTAINED IN THE FOLDER

IS

SET OUT

TO

ENABLE

YOU TO PROPERLY MAINTAIN YOUR NEW EQUIPMENT AND

ENSUFE

THAT

YOU OBTAIN MAXIMUM OPEPCATING EFFECIENCY.

PLEASE ENSURE THAT THIS FOLDER

IS

KEPT

IN

A

SAFE PLACE

FOR

READY REFERENCE

WHEN

REQUIRED.

WHEN REQUESTING SPARE PARTS, QUOTE

THE

MODEL NO. AND SERIAL

NO.

OF

THE

MACHINE

AND

THE PART

NO.

OF

THE ITEM REQUIRED.

FAILURE TO SUPPLY THIS INFORMATION WILL

RF,SULT

IN

UNNECESSARY

BELAYS

IN

SUPPLYING THE CORRECT PARTS.

WELDING INDUSTRIES OF AUSTRALIA

PTY.,

LTD.

SALES

AND SERVICE DIVISIONS

Melbourne

429 4766 Sydney 534 2144

Newcastle

61 1668

Adelaide

352

3022

Brisbane

44 1391 Perth

361.

7088

STATE AGENTS

Hobart

34 7850

Darwin

81

6428

&

84

3076

-2-

INTRODUCTION

GENERAL

OPERATING

AND

MAINTENANCE

INSTRUCTIONS

WELDARC

-

280

(MC77)

This manual has been prepared especially for use in

familiar-

izing personnel

with

the design, installation, operation,

maintenance, and trouble shooting of this equipment.

All

information presented herein should

be

given careful consid-

eration to assure optimum performance

of

this equipment.

RECEIVING/HANDLING

Prior

to

installing this equipment, clean

all

packing material

from around the unit and carefully inspect for 'any damage that

may have occurred during shipment. Any

claims

for

loss

or

damage

that

may

have

occurred in transit must be

filed

by

the

purchaser with Welding Industries of Australia Pty. Ltd.

or

authorised agent immediately

(refer

to

EQUIPMENT

WARRANTY

card enclosed

with

Operating Instruction Manual.)

When

requesting information concerning

this

equipment,

it

is

essential to supply correct Model indentification

and

machine

Serial

No.

SAFETY

Before the equipment

is

put into operation, the

SAFETY PRACTICES

sect,ion

at

the

back

of

this

manual

MUST

BE

READ

COMPLETELY.

This

will

help avoid possible injury due to misuse or improper

welding applications.

CONTENTS

-

Operation

&

Maintenance

Installation

Parts

List

for Drawing No. MC77-0

Assembly Drawing No. MC77-0

Safety

Practices

-

2-

OPERATION

Rating:

The

Weldarc

280

is

rated

to Australian Standard

AS1966

-

1976

Light Industrial

Class.

The machine has a weld-

ing current range

of

70

-

280 amps infinitely variable

over two ranges.

LOW

CURFXNT

RANGE

(For

all

A.C.

electrodes, particularly low hydrogen and special

electrodes)

:-

70

-

220 amps

.at

78

volts

open circuit

-

DUTY

CYCLE

80

amps

23

volts

100%

150

amps

26

volts 25%

HIGH

CURRENT

RANGE

(For

all mild

steel

electrodes, cutting and

burning holes)

:-

90

-

280 amps

at

55

volts

open circuit.

I

DUTY

CYCLE

130A 25.2V

100%

200

amps 28 volts 25%

RATED

OUTPUT

:

LOW

CURRENT

RANGE

220

amps

29

volts

20% duty cycle.

HIGH

CURRENT

RANGE

280A 31V

20%

-

SELECTING

THE

CURRENT

RANGE

In general the high open circuit voltage low current range pro-

vides the

best

stable running conditions when

small

electrodes

and low currents

are

employed.

As

the welding current increases

so

the

arc

stability also increases and

lower

arc

voltages

can

be used. For high production conditions

select

the

high current

range

to

obtain

the

best

duty cycle.

On setting up the welder plug the work lead into the work terminal

by inserting

the

plug into

the

socket

until

it

locks into position.

This

self

locking action secures the plug and ensures

a

good

elec-

trical

connection.

Select

the

electrode you

wish

to

use and plug

the

welding

lead

into the appropriate current range socket. Adjust

the

current

by unlocking

the

T

bar

handle (turn to

Left

to

unlock) and moving

it

along until

the

shaft

is

aligned

with

the desired current

value, then

RELOCK

the handle firmly,by rotating

it

to the right.

MAINTENANCE

Your machine

is

lubricated

with

graphite

grease

before leaving

the factory. However,

in

dry dusty locations,

the

air

ducts

of

the

machine can clog causing

lack

of

ventilation resulting

in the overheating

of

the

machine transformer.

It

is

good

practice

to

blow the transformer out

at

regular intervals with

dry compressed

air.

ELECTRODES

For best results from your Weldarc 280 use

W.I.A.

-

'AUSTARC'

Electrodes obtainable from your

State

Branch

or

W.I.A.

Distrib-

utor.

-4-

..

This welding machine

is

designed for connection to

a

single phase

240

volts,

415

volt or 480 volt 50 hz supply.

_.

The rated currents and fusing

sizes

are:-

Primary supply voltage

240

vol-ts

415 volts

480

volts

Rated input current

34 amps

19.7

amps

17

amps

Max. short circuit current

90

amps

45 amps

39

amps

Wire

fuse

size

40

amps

30

amps

30

amps

H.R.C.

fuse size

60

amps

40

amps

40

amps

The installing

Electrician

should ensure that the primary cable

is

capable of carrying the rated primary current and the connect-

ion links on the primary coil terminal block

are

arranged to suit

the voltage that the machine

is

being connected

to.

(see

terminal

connection printed

on

back cover.

)

To

connect the machine

it

is

necessary to

remove

the back panel.

The cable entry

is

located in

the

back

at

the bottom behind the

terminal block. The terminal block

is

situated

on

the left hand

side

of

the

transformer

and the

brass

earth

screw

directly

below

it.

PORTABLE

MOUNTING

ASSEMBLY

(when used)

-

Refer

to

drawing No.

MC76-40

Attach the

axle

by means

of

two

%"W

hex head

set

screws

to

the

two holes provided in the

rear

of the skids.

Assemble

the wheels onto the lubricated shaft.

Fit

the washers

then tap the ratchet caps on the ends

of

axle.

To

fit the handle, remove the

4

-

%"

hex head

set

screws

in

the

top panel and attach

the

handle

as

shown

on

drawing nu.nbcr

MC76-.40.

POWER

FACTOR

CORRECTION

Space

is

provided within the

case

for power factor

correction

cap-

acitors if required to

be

fitted.

I_

RECOMMENDED

WELDING

CABLE

For

both electrode and work cables use

1121/0.20

flexible welding

cable.

If

the combined length

of

both

cables

exceeds

20

metres,

it

is

recommended that

703/0.30

flexible welding cable be

used

to

avoid excessive voltage drops..

Only genuine

W.I.A.

welding lead plug connectors, part nu.mber

AA36

should be used with this machine.

DRAWING NOMC77-0

_l"l_l

""

___-

U

c

+=

W

ISSUE

NO1

1"""

DRAIqING

NO.

MC77-0

PARTS

LIST ISSUE

1.

-

I

NO.

1

..

1.1

1.2

l.

3

2

3

4

5

6

7

8

9

LO

-

11.

l

12

13

14

15

16

16.1

17

L8

19

PART

NO.

MC76-11

MC~

6-

2

3

MC76-12

MC76-13

MC76-31.

MC76-33

MC76-34

MC76-35

AA35

MC76-25

W76-26

YC14-1/14

YC20-0/25

IIC14-0/10

IIC14-0/11

vlC76-24

3C76-0/13

VIN44

U36

.IC77-0/17

4C77-0/18

4C30-01/17

1C35-0/10

DESCRIPTION

"

TRANSFORMER ASSEIBLY

PIVOT BEARING ASSEMBLY

PRIMARY COIL ASSEMBLY

SECONDARY COIL ASSEMBLY

BASE

F-

ASSEMBLY

FRONT PANEL

BACK PANEL

COVER

OUTPUT TERMINAL ASSEPBLY

LOCKING HANDLE

WASHER

FOR

LOCKING HANDLE

TERMINAL STRIP

TERMINAL BLOCK

MALE PLASTIC BUSH

FEMALE PLASTIC BlJSH

LOCKING QUADRANT

INTERNAL CONNECTING LEADS

SERIAL No./TYPE

No.

NAMEPLATE

OUTPUT TERMINAL PLUG

FAN

MOTOR

FAN

BLA.DE

PRIMARY SUPPLY

CABLE

ON/OFF

SWITCH

(WHEN FITTED)

INDICATOR LIGHT

(

"

1

(

)

DRAWING

No

MC76-40

ISSUE

NO1

TO

FIT

WHEELS

AND

HANDLE

-ASSEMJ3LY

Attach the

axle

by

means

of

two

$"W

hex head

set

screws

to

the

two

holes provided in the

rear

of

the skids.

Assemble

the wheels

onto

the lubricated shaft. Fit the washers then tap the ratchet

caps

on

the ends

of

axle.

To

fit

the handle, remove

the

4

-

%"W.

hex

head

set

screws

in the top panel and attach

as

shown.

.-

SAFE

PRACTICES

IN

USING

WELDING

AND

CUTTING

EQUIPMEKT

!.

t

WIA Weldarc 280 Workhorse Owner's manual

WIA Weldarc 280 Workhorse Owner's manual

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