Miller Auto Arc User manual

July

1988

FORM:

118583

OWN

ERS

MANUAL

IT/VAI5F1____

I~1

1J

I~I



MILLER

ELECTRIC

MFG.

Co.

718

BOUNDS

ST,

P.O.

Box

1079

APPLETON,

54912

USA

ADDITIQNAL

COPY

PRICE

CENTS

IMPORTANT

Read

and

understand

the

entire

contents

this

manual,

with

special

emphasis

the

safety

material

throughout

the

manual,

before

installing,

operating,

maintaining

this

equip

ment.

This

unit

and

these

instructions

are

for

use

only

persons

trained

and

experienced

the

safe

operation

welding

equipment.

not

allow

trained

persons

install,

operate,

maintain

this

unit.

Contact

your

distributor

you

not

fully

understand

these

instructions.

Effective

With

Serial

No.

JH304844

MODEL

AUTO

ARC

WELDER

NWSA

CODE

NO.

4679

PRINTED

U.S.A.

ONE

YEAR

LIMITED

WARRANTY

COVERAGE

Miller

Electric

Mlg.

Co.

warrants

the

buyer

REMEDY

FOR

DEFECTIVE

WELDER

Upon

receipt

any

who

purchases

this

Auto

Arc

Welder

(Welder)

for

personal,

defective

Welder,

Miller

Electric

will,

its

option,

repair

c~

family

household

purposes

(Consumer)

that

this

Welder

replace

the

defective

Welder

its

expense,

refund

credit

will

free

from

defects

material

and

workmanship

for

the

purchase

price

(less

reasonable

depreciation

based

period

one

year

from

the

date

purchase.

This

warranty

tual

use),

reimburse

the

Consumer

for

the

cost

repair

covers

only

the

original

purchaser

this

Welder.

Miller

Electric

replacement

approved

Miller

Electric

warranty

station,

~

does

not

authorize

any

party,

including

its

authorized

provided

that

the

purchaser

that

Welder

has

followed

the

distributors,

offer

any

other

warranty

behalf

Miller

procedure

for

obtaining

warranty

performance

set

forth

below~



Electric.

Upon

expiration

the

warranty

period,

Miller

Electric

The

Welder

repaired

used

replacement

will

ship-

,~

shall

have

further

liability

the

Welder,

except

ped

the

purchaser

the

defective

Welder,

with

transporta

warranty

claims

made

during

the

warranty

period.

tion

charges

prepaid

any

destination

the

continental

United

States

(transportation

charges

shipments

Alaska

THIS

WARRANTY

OFFERED

LIEU

ANY

OTHER

Hawaii

will

paid

only

the

nearest

port

export).

EXPRESS

WARRANTY;

AND,

EXCEPT

THE

EXTENT

PROHIBITED

APPLICABLE

LAW,

THE

DURATION

ALL

IMPLIED

WARRANTIES,

INCLUDING

BUT

NOT

THE

PURCHASERS

REMEDIES

FOR

DEFECTIVE

i*~

LIMITED

THE

IMPLIED

WARRANTIES

MERCHAN-

WELDER,

THE

EXTENT

PERMITTED

APPLICABLE

TABILITY

AND

FITNESS

FOR

PARTICULAR

PURPOSE,

LAW,

ARE

LIMITED

THE

REMEDY

PROVIDED

THIS

LIMITED

THE

DURATION

THIS

WARRANTY.

WARRANTY:

AND,

THE

EXTENT

ENFORCEABLE

UNDER

APPLICABLE

LAW,

MILLER

ELECTRIC

SHALL

Some

states

not

allow

limitations

how

long

implied

EVENT

LIABLE

FOR

CONSEQUENTIAL,

INCIDENTAL

warranty

lasts,

the

above

limitation

may

not

apply

you.

SPECIAL

DAMAGES

ARISING

OUT

THE

USE

OF,

~

This

warranty

gives

you

specific

legal

rights,

and

you

may

also

INABILITY

USE,

THE

WELDER,

WHETHER

BASED

have

other

rights

which

vary

from

state

state.

BREACH

THIS

WARRANTY,

MILLER

ELECTRICS

NEGLIGENCE

OTHER

TORT,

ANY

THEORY

STRICT

LIABILITY.

Except

specified

below,

Millers

warranty

does

not

apply

on-

components

having

normal

useful

life

less

than

one

(1)

year.

such

spot

welder

tips,

relay

and

contactor

points,

Some

states

not

allow

the

exclusion

limitation

parts

that

come

contact

with

the

welding

wire

including

sequential

incidental

damages,

the

above

limitations

may

not

apply

you.

nozzles

and

nozzle

insulators

where

failure

does

not

result

from

defect

workmanship

material.

PROCEDURE

FOR

OBTAINING

WARRANTY

PERFORMANCE

Miller

shall

required

honor

warranty

claims

war

~

ranted

Equipment

the

event

failure

resulting

from

defect

soon

any

defect

Welder

becomes

known,

the

pur

within

the

following

periods

from

the

date

delivery

Equip-

chaser

the

Welder

must,

within

thirty

(30)

days,

notify

ment

the

original

user:

approved

Warranty

Station

Miller

Electric

writing

the

Arc

welders,

power

sources,

and

components

defect.

The

purchaser

must

then,

within

the

one

year

warranty

year

period,

return

the

Welder

Miller

Electric

the

following

ad-

Original

main

power

rectifiers

years

dress:

(labor~

year

only)

All

welding

guns,

feeder/guns

and

plasma

torches

ClayS

Miller

Electric

Co.

Replacement

repair

parts,

exclusive

labor

days

718

South

Bounds

Street

P.O.

Box

1079

WHAT

NOT

COVERED

This

warranty

does

not

extend

Appleton,

Wisconsin

54912

~A.

any

Welder

subjected

misuse,

neglect,

accident,

in-

warranty

repair

anyone

except

Miller

Electric. Further,

this

All

transportation

charges

Warranty

Station

Miller

Electric

~4

warranty

only

extends

those

purchasing

the

Welder

for

per-

must

prepaid.

sonal,

family

household

purposes.

Commercial

and

dustrial

users

are

given

different

warranty.

TABLE

CONTENTS

Section

No.

Page

No.

SECTION



SAFETY

RULES

FOR

OPERATION

PORTABLE

RESISTANCE

SPOT

WELDING

EQUIPMENT

1-1.

Introduction

1-2.

Installation

1-3.

Safety

Devices

1-4.

Personal

Safety

1-5.

Burn

Prevention

1-6.

Fumes

1-7.

Fire

Prevention

1-8.

Protection

Others

1-9.

Cords

1-10.

Hoses

1-11.

Maintenance

1-12.

Standards

Index

SECTION

2

INTRODUCTION

2-1.

General

Information

And

Safety

2-2.

Receiving-Handling

2-3.

Description

SECTION

3

INSTALLATION

3-1.

Electrode

Installation

3-2.

Electrical

Input

Connections

SECTION

4

SEQUENCE

OPERATION

4-1.

Operator

Controls

4-2.

Welding

4-3.

Clip

Welding

4-4.

Shrinking/Expanding

4-5.

Shutting

Down

SECTION

MAINTENANCE

TROUBLESHOOTING

5-1.

Routine

Maintenance

5-2.

Troubleshooting

SECTION



SAFETY

RULES

FOR

OPERATION

PORTABLE

RESISTANCE

SPOT

WELDING

EQUIPMENT

1-1.

INTRODUCTION

The

following

safety

rules

cover

general

safe

practices

which

minimum

should

employed

when

using

resistance

spot

welding

equipment.

Establishment

attitude

safety

consciousness

necessary

for

the

protection

personnel

and

property.

not

install,

operate,

maintain

this

equipment

fore

reading

this

manual.

1-2.

INSTALLATION

All

equipment

should

installed

qualified

personnel

conformance

with

local,

state,

and

federal

codes.

1-3.

SAFETY

DEVICES

Safety

devices

such

fuses

should

not

discon

nected

shunted

out.

1-4.

PERSONAL

SAFETY

Before

installation,

inspection,

service

equipment,

disconnect

input

power

and

employ

lockout/tagging

pro

cedures

prevent

accidental

turning

power.

Always

shut

off

power

when

leaving

equipment

unat

tended.

Disconnect

provisions

must

available

nearthe

equip

ment.

1-5.

BURN

PREVENTION

Wear

long-sleeve

shirt

and

cuff-less

trousers

addition

gloves,

hat,

and

high

top

shoes.

Button

shirt

collar,

pocket

flaps,

and

sleeve

cuffs

avoid

entry

sparks.

Woolen

clothing

preferable

cotton

because

not

readily

ignited.

Cotton

clothing

used

should

chemically

treated

reduce

its

combustibility.

Clothing

treated

with

nondurable

flame-retardent

matenals

should

retreated

after

each

wetting

cleaning.

Wear

safety

goggles

glasses

with

side

shields.

Use

face

shield

for

severe

exposure

flying

sparks.

Avoid

oils

greases

clothing

which

could

ignited

by sparks

and

not

use

flammable

hair

preparations.

not

handle

hot

metal

such

tong

tips

workpiece

without

wearing

gloves.

1-6.

FUMES

Severe

discomfort

illness

can

result

from

fumes

and

vapors

produced

welding.

Use

adequate

ventilation

described

ANSI

Z49.1.

Lead-,

cadmium-,

zinc-,

mercury-,

and

beryllium-bear

ing

and

similar

materials

when

welded

may

produce

harmful

concentrations

toxic

fumes.

Adequate

local

exhaust

ventilation

must

used

for

each

person

the

area

well

the

operator

must

wear

air-supplied

respirator.

Both

must

used

when

beryllium

volved.

Metals

coated

with

materials

that

emit

toxic

fumes

should

not

heated

unless

the

coating

removed

from

the

surface,

the

area

adequately

ventilated,

the

operator

wears

air

respirator.

1-7.

FIRE

PREVENTION

Flying

sparks

can

pass

through

cracks,

windows,

doors,

wall

and

floor

openings,

and

along

pipes.

combustibles

are

nearby,

not

weld.

Move

work

practicable

area

free

combustibles.

work

can

not

moved,

move

combustibles

safe

location

protect

against

ignition

with

suitable

and

snug-fitting

fire

resistant

covers

shield.

Walls,

ceilings,

and

floors

near

the

work

area

should

fire

resistant

protected

fire

resistant

covers

shields.

not

weld

where

atmosphere

may

contain

flammable

dust,

gas,

liquid

vapors

(such

gasoline).

not

exceed

the

equipment

rated

capacity.

After

completion

work

inspect

area

ensure

free

sparks,

glowing

embers,

and

flames.

1-8.

PROTECTION

OTHERS

Workers

other

persons

adjacent

the

welding

area

should

protected

noncombustible

flame-resis

tant

screens

shields

should

required

wear

suitable

eye

protection.

Booths

and

screens

should

per

mit

circulation

air

floor

level.

1-9.

CORDS

Frequently

inspect

for

wear,

cracks,

and

damage.

mediately

replace

cords

with

excessively

worn

dam

age

insulation

avoid

possibly

lethal

shock

from

bared

conductors.

Keep

cords

dry,

free

oil

and

grease

and

protect

from

hot

metal

and

sparks.

1-10.

HOSES

water

cooled

equipment

examine

hoses

and

fittings

regularly

for

leaks

and

loose

connections.

Repair

place

leaky

hoses

and

fittings.

not

use

tape

repair

leaky

hoses.

1-11.

MAINTENANCE

Remove

leaky

orfaulty

equipment

from

service

immedi

ately

for

repair.

Keep

equipment

clean

and

properly

justed.

1-12.

STANDARDS

INDEX

ANSI

Standard

Z49.1

Safety

Welding

And

Cut

ting,

obtainable

from

the

American

Welding

Soci

ety,

550

Jeune

Rd.,

P.O.

Box

351040,

Miami,

33135.

118583

Page

NFPA

Standard

70-1978,

National

Electrical

Code,

obtainable

from

the

National

Fire

Protection

Association,

470

Atlantic

Avenue,

Boston,

02210.

OSHA

Safety

And

Hea~h

Standards,

CFR

1910,

obtainable

from

the

Superintendent

Docu

ments,

U.S.

Government

Printing

Office,

Washing

ton,

D.C.

20402

ANSI

Standard

Z87.i

Safe

Practices

For

Occupa

tion

And

Educational

Eye

And

Face

Protection,

tainable

from

the

American

National

Standards

stitute,

1430

Broadway,

New

York,

10018.

ANSI

Standard

Z41.1

Standard

For

Mens

Safety

Toe

Footwear,

obtainable

from

the

American

Na-

tional

Standard

Institute,

1430

Broadway,

New

York,

10018.

ANSI

Standard

Z49.2

Fire

Prevention

The

Use

Cutting

And

Welding

Processes,

obtainable

from

the

American

National

Standards

Institute,

1430

Broadway,

New

York,

10018.

NFPA

Standard

51B,

Cutting

And

Welding

Pro

cesses,

obtainable

from

the

National

Fire

Protec

tion

Association,

470

Atlantic

Avenue,

Boston,

02210.

NWSA

booklet,

Welding

Safety

Bibliography,

tainable

from

the

National

Welding

Supply

Associa

tion,

1900

Arch

Street,

Philadelphia,

19103.

Code

for

Safety

Welding

And

Cutting,

GSA

Stan

dard

17.2-1974.

SECTION

2-INTRODUCTION

Gun

Weight:

lb.

Oz.

(4.3

kg)

115

Volt

AC,

Ampere

Input

Power

Required

loft.

(3m)

Power

Cord

lB-i

18775

FIgure

2-1.

DImensIonal

VIew

2-1.

GENERAL

INFORMATION

AND

SAFETY

General

Information

presented

this

manual

and

various

bels,

tags,

and

plates

the

unit

pertains

equipment

design,

installation,

operation,

maintenance,

and

trou

bleshooting

which

should

read,

understood,

and

fol

lowed

for

the

safe

and

effective

use

of this

equipment.

Safety

The

installation;

operation,

maintenance,

and

trou

bleshooting

resistance

spot

welding

equipment

quires

practices

and

procedures

which

ensure

personal

safety

and

the

safety

others.

Therefore,

this

equip

ment

installed,

operated,

and

maintained

only

qualified

persons

accordance

with

this

manual

and

all

applicable

codes

such

as,

but

not

limited

to,

those

listed

11-314

In.

4-1/4

In.

mm)

(222

mm)

118583

Page

the

end

Section



Safety

Rules

For

Operation

Portable

Resistance

Spot

Welding

Equipment.

Safety

instructions

specifically

pertaining

this

unit

pear

throughout

this

manual

highlighted

the

signal

words

WARNING

and

CAUTION

which

identify

differ

ent

levels

hazard.

WARNING

statements

include

installation,

operation,

and

maintenance

procedures

practices

which

not

carefully

followed

could

result

serious

personal

injury

loss

life.

CAUTION

statements

include

installation,

operation,

and

maintenance

procedures

practices

which

not

carefully

followed

could

result

minor

personal

injury

damage

this

equipment.

third

signal

word,

IMPORTANT

highlights

instn.ic

tions

which

need

special

emphasis

obtain

the

most

ficient

operation

this

equipment.

2-2.

RECEIVING-HANDLING

Before

installing

this

equipment,

clean

all

packing

mate

rial

from

around

the

unit,

and

carefully

inspect

for

any

damage

that

may

have

occurred

during

shipment.

Any

claim

for

loss

damage

that

may

have

occurred

tran

sit

must

filed

the

purchaser

with

the

carrier.

copy

the

bill

lading

will

furnished

the

manu

facturer

request

occasion

file

claim

arises.

When

requesting

information

concerning

this

equip

ment,

essential

that

Model

Description

and

Serial

Number

the

equipment

supplied.

2-3.

DESCRIPTION

This

unit

hand-held

resistance

welding

unit

signed

for

use

auto

body

repair.

The

unit

can

used

for

welding,

welding

trim

moulding

clips,

and

shrink

ing/expanding.

Welding

time

determined

the

erator.

The

unit

protected

circuit

breaker

which

opens

when

overload

condition

exists.

Equipment

supplied

includes:

Welder,

elec

trode,

clip

electrode,

shrinking

electrode,

pins,

clips,

slide

hammer,

and

tool

box

for

storage

equipment.

3-1.

ELECTRODE

INSTALLATION

(Figure

3-1)

WARNING:

ELECTRIC

SHOCK

can

kill;

HOT

SURFACES

can

burn

skin.



not

touch

live

electrical

parts.



Disconnect

input

powercord

from

wersup

ply

receptacle

before

installing

electrode.



Allow

electrode

coo/before

touching.

Pull

electrode

from

electrode

holder

assembly,

necessary.

Push

desired

electrode

into

electrode

holder

sembly.

These

electrodes

are

tapered

and

need

not

twisted

keyed.

SECTION

3-INSTALLATION

Electrode

Pln

Electrode

Illustrated

Start

Switch

Outer

Electrode

Circuit

Breaker

115

VAC

Power

Cord

And

Plug

FIgure

3-1.

ResIstance

Welder

Components

Select

electrode

according

application.

TB-118

775

118583

Page

3-2.

ELECTRICAL

INPUT

CONNECTIONS

dards

and

any

additional

state

and

local

codes.

cord

with

plug

attached

provided

this

unit.

Check

nameplate

for

input

voltage

requirement,

and

connect

the

plug

properly

grounded

and

protected

(fuses

circuit

breakers)

115

volt

receptacle

capable

sup

plying

amperes.

sure

that

the

building

supply

and

receptacle

comply

with

National

Electrical

Code

stan-

IMPORTANT:

The

supply

wiring

for

the

resistance

welder

must

capable

handling

ampere

load.

The

resistance

welder

must

the

only

load

connected

the

supply

circuit.

Poorunit

performance

frequently

opening

line

fuses

circuit

breakers

can

result

from

inadequate

improper

supply.

SECTION

4

SEQUENCE

OPERATION

WARNING:

ELECTRIC

SHOCK

can

kill.



not

touch

live

electrical

parts.



Keep

all

covers

place

while

operating.

Warranty

void

resistance

welder

operated

with

any

portion

the

outer

enclosure

removed.

HOT

METAL

AND

SPARKS

can

cause

fire

and

burns.



Wear

correct

eye,

ear,

and

body

protection.



Allow

equipment

and

work

cool

before

han

dling.



Watch

for

fire.



Have

fire

extinguisher

nearby,

and

know

how

use

it.

FUMES

AND

GASES

can

seriously

harm

your

health.



Ventilate

keep

from

breathing

fumes

and

gases.



ventilation

inadequate,

use

approved

breathing

apparatus.

MOVING

PARTS

can

cause

serious

Injury.



Keep

clear

pinch

points.

MAGNETIC

FIELDS

FROM

HIGH

CURRENTS

can

affect

pacemaker

operatIon.



Wearers

should

consult

with

their

doctor

fore

going

near

welding

operations.

See

Section



Safety

Rules

For

Operation

Portable

Resistance

Spot

Welders

for

basic

welding

safety

information.

4-1.

OPERATOR

CONTROLS

Start

Switch

(FIgure

3-1)

The

Start

switch

spring-loaded,

momentary-contact

push

button

which

provides

on/off

control

the

weld

output.

Push

and

hold

switch

for

desired

weld

time.

Releasing

the

switch

shuts

off

weld

output.

Circuit

Breaker

The

circuit

breaker

provides

overload

protection.

When

the

unit

operated

rate

that

exceeds

its

capacity,

the

circuit

breaker

opens,

shutting

off

weld

output.

Allow

brief

cooling

period

before

resetting

the

circuit

break-

er.

4-2.

WELDING

Pins

are

welded

onto

auto

body

sheet

metal

dents.

The

supplied

slide

hammer

used

pull

the

pin,

thereby

pulling

out

the

dent

the

auto

body

sheet

metal.

WARNING:

Read

and

safety

Informa

tion

beginning

entire

Section

before

proceedIng.

Install

electrode

(see

Section

3-1).

Insert

into

electrode.

Plug

unit.

sure

that

surface

where

welded

clean,

bare

metal.

Push

resistance

welder

against

surface

until

electrode

outer

ring

seated

against

clean,

bare

metal.

Press

Start

switch

for

0.5

1.0

seconds.

There

should

than

1/8

1/4

in.

(3.1

6.3

mm)

discoloration

around

weld.

Slip

slide

hammer

over

and

tighten.

remove

dents,

pull

slide

hammer

with

constant

force

and

tap

damaged

area

with

body

hammer.

necessary,

use

force

slide

hammer

pull

dent

out.

Afterdentispulledout,cutoff

and

grind

off

head.

IMPORTANT:

For

larger

indents,

several

pins

can

welded

onto

the

body

1/2

in.

(13

mm)

interials

and

clamped

together.

Clamped

pins

can

pulled

using

come-along

body

and

frame

straightening

equip

ment.

4-3.

CLIP

WELDING

Trim

moulding

clips

can

welded

onto

auto

body

sheet

metal

using

the

resistance

welder.

WARNING:

Read

and

safety

informa

tlon

beginning

entire

Section

before

proceedIng.

Install

clip

electrode

(see

Section

3-1).

Insert

clip

into

electrode.

Plug

unit.

118583

Page

sure

that

surface

where

clip

welded

clean,

bare

metal.

Push

resistance

welder

against

surface

until

electrode

outer

ring

seated

against

clean,

bare

metal.

Press

Start

switch

for

0.5

1.0

seconds.

There

should

than

1/8 to

1/4

in.

(3.1

6.3

mm)

discoloration

around

weld.

4-4.

SHRINKING/EXPANDING

High

spots

and

small

dents

can

smoothed

using

the

shrink

electrode

apply

heat

these

areas.

WARNING:

Read

and

safety

Informa

tion

beginning

entire

Section

before

proceedIng.

Install

shrinking

electrode

(see

Section

3-1),

and

plug

unit.

sure

that

surface

worked

clean,

bare

metal.

Push

resistance

welder

against

surface

until

electrode

outer

ring

seated

against

clean,

bare

metal.

Press

Start

switch

for

0.5

seconds

two

three

times

heat

metal.

high

spot

does

not

shrink,

tap

lightly

with

body

hammer.

dent

does

not

expand,

carefuIIy~apply

damp

cloth

the

heated

metal.

4-5.

SHUTTING

DOWN

Disconnect

input

power

cord

from

receptacle.

SECTION

MAINTENANCE

TROUBLESHOOTING

5-1.

ROUTINE

MAINTENANCE

IMPORTANT:

Every

six

months

inspect

the

labels

this

unit

for

legibility.

Al!

precautionary

labels

must

maintained

clearly

readable

state

and

replaced

when

necessary.

See

Parts

List

for

part

number

pre

cautionary

labels.

WARNING:

ELECTRIC

SHOCK

can

kill.



not

touch

live

electrical

parts.



Disconnect

input

power

cord

from

power

sup

ply

receptacle

before

inspecting,

maintaining,

servicing.

HOT

SURFACES

can

cause

severe

burns.



Allow

cooling

period

before

servicing.

Troubleshooting

internal

parts

per

formed

only

qualified

persons.

Power

Cord

Every

three

months

inspect

cord

for

breaks

insulation.

Repair

replace

cord

insulation

breaks

are

present.

Clean

grease

and

moisture

from

cord

each

inspec

tion.

Electrode

MaIntenance

Keep

electrodes

clean

and

free

grease

and

moisture.

Fine

steel

wool

can

used

keep

electrode

parts

clean.

fine

metal

file

can

used

keep

the

outer

electrode

flat.

5-2.

TROUBLESHOOTING

WARNING:

ELECTRIC

SHOCK

can

kIll.



not

touch

live

electrical

parts.



Disconnect

input

power

cord

from

power

sup

ply

receptacle

before

inspecting,

maintaining,

servicing.

HOT

SURFACES

can

cause

severe

burns.



Allow

cooling

period

before

servicing.

MOVING

PARTS

can

cause

serIous

Injury.



Keep

clear

pinch

points.

Troubleshooting

internal

parts

per

formed

only

qualified

persons.

assumed

that

the

unit

was

properly

installed

accord

ing

Section

of this

manual,

the

operator

familiar

with

the

function

controls,

the

resistance

welder

was

working

properly,

and

that

the

trouble

not

the

process.

The

following

chart

designed

diagnose

and

provide

remedies

for

some

the

troubles

that

may

develop

this

resistance

welder.

the

trouble

not

remedied

after

performing

these

pro

cedures,

contact

the

nearest

Factory

Authorized

Ser

vice

Station.

all

cases

equipment

malfunction,

the

manufacturers

recommendations

should

strictly

fol

lowed.

118583

Page

TROUBLE

PROBABLE

CAUSE

REMEDY

weld

output.

Open

line

fuse

circuit

breaker.

Replace

line

fuse

reset

line

circuit

breaker.

Circuit

breaker.

Reset

circuit

breaker.

Weld

circuit

not

complete.

Press

outer

electrode

firmly

against

clean,

bare

metal.

Start

switch.

Replace

Start

switch.

Longer

than

normal

weld

time.

Electrode.

Clean

replace

electrode.

Material

welded

dirty.

Clean

material

welded.

Burn

through

point

weld.

Weld

time

too

long.

Shorten

weld

time.

Electrode.

Use

correct,

clean

electrode.

118583

Page

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