WIA Miniarc Owner's manual

MINIARC

MC66

"""""""""-

CAT. 7501

7/7 7

THE INFORMATION CONTAINED

IN

THE FOLDER

IS

SET OUT TO ENABLE

YOU

TO PROPERLY MAINTAIN

YOUR

NEW EQUIPMENT

AND

ENSURE THAT

YOU

OBTAIN MAXIMUM OPERATING EFFICIENCY.

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 1NFORI"IATION WILL RESULT

IN

UNNECESSARY DELAYS

IN

SUPPLYING THE CORRECT PARTS.

WELDING INDUSTRIES

OF

AUSTRALIA PTY. LTD.,

SALES

AND

SERVICE

DIVISIONS

Melbourne

4'65 2511

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

OPERATING

AND

MAINTENANCE

INSTRUCTIONS

INTRODUCTION

GENERAL

This manual has been prepared especially for use in familiar-

ising personnel with the design, installation, operation,

maintenance, and troubleshooting 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 identification and

machine

Serial

No.

SAFETY

Before the equipment

is

put into operation, the

SAFETY

PRACTICES section

at

the back

of

this manual MUST

BE

READ

COMPLETELY.

This

will

help avoid possible injury due to

misuse or improper welding applications,

CONTENTS

Specification, Installation

Setting Up the Welder

Maintenance

&

General

Assembly Drawing

No

and

Parts

List

SAFETY PRACTICES

EQUIPMENT

GUARANTEE

W.I.A.

OPERATING

AND

JAINTENANCE

INSTRUCTIONS

'MINIARC

MC66'

DESCRIPTION

The

W.I.A.

'MINIARC'

Plodel

MC66

is

a

compact portable

A.C.

arc

welding unit.

It

is

designed for use with mild

steel

welding electrodes from

2mm

up to

3.25mm.

diameter,

This

unit complies with Australian Standards Specification AS1966

for limited input

class

machines, which, in effect, means

a

machine which

is

designed for use from

a

15

amp.

240

volt

50

hertz single phase

AC

supply and that the Duty Cycle

and Current Output

are

so

designed to match this

15

amp.

SUPPlY.

SPECIFICATIONS

The welding current rating

is

115 amp~~24.5

volts

25%

Duty

Cycle,

5

minute averaging periods,

140

C

temperature

rise,

Class

H

insulation. For the operator, this rating means that

he

can

adjust his welding current

to

115

amps, weld for

1%

minutes in every

5

minute period without causing overload to

the machine, or when correctly installed, the

electrical

installation. Welding Current Output,

45

-

140

amp contin-

uously variable over the range.

INSTALLATION

FOR

MC66

The

'MINIARC'

is

designed

to

be connected to

a

240

volt

50

hertz single phase

A.C.

supply. The welder

is

fitted with

a

15

amp. primary cable and plug and

it

is

recommended that

this plug be only connected to

a

suitable

15

amp. switch

plug outlet, capable of delivering

a

continuous load of

15

amperes. The plug and plug socket

are

both identified by

a

wide earth pin and the

15

amp. plug

will

not enter

a

10

amp. domestic socket. However,

a

10

amp. plug such as

used

on

electric

power tools

etc.

can be used with

a

15

amp

socket. Therefore, ensure that your

electric

installation

for the

'MINIARC

MC66'

welder

is

wired with

a

15

amp. socket.

For you,

the

user, to correctly understand

the

above

specifications,

we

have included the following brief

explanation on the meanings of the various

terms

used in

the specification.

'Duty Cycle.' In any

5

minute period, the Duty Cycle

is

the

ratio

of

the total arcing

time

to

5

minutes, expressed

as

a

percentage, e.g. a

3.25

mm

electrode takes

1.25

minutes

to

run

its

full length. The operator takes

3.75

minutes

to

set

up the job for welding and to clean the

slag

off

after welding. Duty Cycle

of

above example

=

25%.

'Limited Input Current' This

is

a

definition agreed to by

Electric

Supply Authorities and welding manufactures

throughout Australia and

restricts

the

output of the machine

to

8.5

KVA

at

a

maximum Duty Cycle of

25%.

'Rated Input Current'

is

a

current drawn by the machine

when

it

is

so

adjusted to

give

its

100%

Duty

Cycle

output.

In

the instance

of

the

'MINIARC'

this

is

dependent on

electode type and

size

being used, approximately

70-90

amps

.

./2

,g

-2-

It

should be readily appreciated from the above that input

and currents in excess of

15

amps. can be drawn from the supply,

and every

care

should be observed not to exceed specified

Duty Cycle period.

EXTENSION CABLES

If

it

is

necessary to use extension cables on the supply

cable, ensure

that

these

are

at

least

the

size

fitted to

the welding machine

(3

core

30/0.25)

also

the longer

the extension cable, the larger the

size

of the cable should

be, to reduce the voltage drop between the supply point

and the machine, otherwise the welding capabilities

will

be

reduced in proportion to the voltage drop on the supply cable.

PORTABLE

MOUNTING

ASSE?4BLY

WHEN

USED

The compact

'MINIARC

MC66'

weighs only 35.5 kg., but should

you desire to wheel the machine around the workshop area,

a

portable mounting

kit

is

available for the

MC66

comprising

wheel and axle assembly and handle assembly complete with

fixing

screws

and instructions which

are

self-explanatory.

SETTING

UP

THE

WELDER

READY

FOR

WORK

On setting up the welder ready for work, connect the Work

Lead to the terminal marked

'WORK'

and the welding lead

to the terminal marked

'ELECTRODE'

and tighten knobs

securely.

NOTE

for

A.C.

arc welders of this type,

it

doesn't

matter

if the leads are accidentally reversed, as no damage can

be done to the welder and welding output

is

unaffected,

however the correct terminals should always be used.

Select

the electrode you wish to use and adjust the electrode

selector by unlocking the knob on the front panel of the

machine and sliding

it

across the quadrant.

Switch the mains power

ON

whereby

a

faint 'hum' should be

heard indicating the transformer

is

energised. After

making final welding current adjustments, ensure that the

locking knob

is

firmly secured.

ELECTRODE

SELECTION

For best results from your

'MINIMATIC

14C66'

use

W.I.A.

'AUSTARC'

mild

steel

arc

welding electrodes for fast, dependable

high quality welding. The full range

is

obtainable from your

nearest

W.I.A.

State Branch or authorised Distributor

For the majority of mild

steel

welding,

a

general purpose

all

position type welding electrode should be chosen, such

as

W.I.A.

'AUSTARC

12P'.

For

material

of

1.6mm

(1/16")

thickness and

less,

use

2.5

mm

or

2

mm.

electrodes. For

material thicknesses over

1.6mm

use 3.25

m

diameter

electrodes.

3/

-3-

MAINTENANCE

In dry, dusty

locations,

the

air

ducts

of

the machine can

become clogged causing lack of ventilation, resulting in

possible overheating

of

the welding transformer.

It

is

good practice

to

blow the transformer out

at

regular

intervals with dry

air

and keep the vent grills

at

the base

of the machine

clear.

RECOMMENDED

WELDING

CABLE

For both

ELECTRODE

and

WORK

cables, 322/0.20 flexible

welding

cable

is

the

correct

size to match the rating of

the machine.

Best

results

are

obtained with genuine

W.I.A.

leads, thus ensuring

all

fittings and connections

are

the

correct

type. For longer welding

cables,

i.e.

5

metres

and over,

use

a

larger size

cable

to

prevent

excessive

current

loss,

e.g.

511/0.20

or 792/0.20.

ACCESSORIES

The recommended Accessory

Kit

for the

'MINIARC'

is

W.I.A.

Kit

No. AA32, and comprises the following:-

1

x

3

metre

Welding Lead complete with Fully Insulated

1

x

3

metre

Work Lead with Clamp and Lug Connector

1

x

Welding

Helmet

complete with lens (shade

10)

and

Tong Type electrode holder and Lug connector.

clear

glass.

WELDING

HANDBOOK

-

'INTRODUCTION

TO

ARC

WELDING'

This

W.I.A.

publication gives brief but concise welding instru-

ction and techniques for various applications and welding pos-

ition. Obtain extra copies from any

W.I.A.

Sales Office

or

Distributor.

AFTER SALES SERVICE

AND

SPARES

W.I.A.

have

a

Sales Branch in

all

major

states

of

Australia

together with

a

network

of

Distributors for each

State.

Not

only

are

you, the user, assured

of

after

sales

service

but you

are

also assured

of

the availability of expert

assist-

ance on

all

welding problems from the Top

Team

in Welding

Technology.

WARRANTY

Have

you filled

out

your Warranty Card and posted

it

to

your

State

W.I.A.

Sales Office?

If

not, do

so

NOW.

SAFETY

We

strongly recommend

you

read thoroughly the information on

'Safe Practices in Using Welding and Cutting Plant'.

MINIARC MC66

/

MINIARC

\P

o/

SPARE PARTS

LIST

-~

ITEM

No

PART N! DESCRIPTION

1

MC66-11

TRANSFORMER ASSEMBLY

1

B1

MC 66-23

PRIMARY COIL

1

S2

MC66-21

SECONDARY

COIL

‘2

3

4

5

-1

5.2

6

7

8

MC66-14 FRONT PANEL

K66-15 BACK PANEL

MC66-16 COVER

K

66

-24 LOCKING KNOB

MC66-40 LOCKING

SCREW

ASSEMBLY

MC

6

6-39 CLAMPINC, PLATES

MC6 6-22 OUTPUT TERM1 NAL ASSEMBLY

MC66.0/8

FLEX

01

PLUG

SlC20-0/25

TEftrrlINAL

BLOCI(

DRAWING N?MC66-31

ISSUE NO2

WIA Miniarc Owner's manual

WIA Miniarc Owner's manual

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