Miller SYSTEM 9 GAS CONTROL HUB & SPINDLE WIRE REEL Manual de usuario

t~e

096~

OWN

ERS

MANUAL

November1983

FORM:

OM-1537B

Effective

With

Serial

No.

J0668503

MODEL

SYSTEM

GAS

CONTROL

HUB

SPINDLE

WIRE

REEL

ITIIIIER

MILLER

ELECTRIC

MFG.

CO.

778

BOUNDS

SI,

P.O.

Box

1079

APPLETON,

54912

USA

NWSA

CODE

NO.

4579

PRINTED

U.S.A.

LIMITED

WARRANTY

EFFECTIVE:

JUNE

1979

This

warranty

supersedes

all

MILLER

warranties

and

ex~

clusive

with

other

guarantees

warranties

expressed

implied.

,~j

LIMITED

WARRANTY-Subject

the

terms

and

conditions

matter

general

policy

only,

Miller

may

honor

claims

hereof,

Miller

Electric

Mfg.

Co..

Appleton,

Wisconsin

warrants

submitted

the

original

user

within

the

foregoing

periods.

its

Distributor/Dealer

that

all

new

and

unused

Equipment

(

furnished

Miller

free

from

defect

workmanship

and

the

case

Millers

breach

warranty

any

other

duty

material

the

time

and

place

delivery

Miller.

war-

with

respect

the

quality

any

goods,

the

exclusive

remedies

ranty

made

Miller

with

respect

engines,

trade

ac-

therefore

shall

be,

Millers

option

Ill

repair

12)

replacement

cessories

other

items

manufactured

others.

Such

or,

where

auttronzed

writing

Miller

appropriate

cases,

13)

engines,

trade

accessories

and

other

items

are

sold

subject

the

reasonable

cost

repair

replacement

authorized

the

warranties

their

respective

manufacturers,

any

All

Miller

service

station

141

payment

credit

for

the

purchase

engines

are

warranted

their

manufacturer

for

one

year

from

price

Iless

reasonable

depreciation

based

upon

actual

usel

upon

date

original

purchase.

return

the

goods

Customers

risk

arid

expense.

Upon

receipt

notice

apparent

defect

failure,

Miller

shall

instruct

the

clai

Except

specified

below,

Millers

warranty

does

not

apply

mant

the

warranty

claim

procedures

followed.

components

having

normal

useful

life

less

than

one

year,

such

spot

welder

tips,

relay

and

contactor

points,

ANY

EXPRESS

WARRANTY

NOT

PROVIDED

HEREIN

AND

MILLERMATIC

parts

that

come

contact

with

the

welding

ANY

IMPLIED

WARRANTY,

GUARANTY

REPRESENTA-

wire

including

nozzles

and

nozzle

insulators

where

failure

does

TION

PERFORMANCE,

AND

ANY

REMEDY

FOR

not

result

from

defect

workmanship

material.

BREACH

CONTRACT

WHICH,

BUT

FOR

THIS

PROVISION,

MIGHT

ARISE

IMPLICATION.

OPERATION

LAW,



Miller

shall

required

honor

warranty

claims

war-

CUSTOM

TRADE

COURSE

DEALING,

INCLUDING

ranted

Equipment

the

event

failure

resulting

from

defect

ANY

IMPLIED

WARRANTY

MERCHANTABILITY

within

the

following

periods

from

the

date

delivery

Equip-

FITNESS

FOR

PARTICULAR

PURPOSE,

WITH

RESPECT

ment

the

original

user:

ANY

AND

ALL

EQUIPMENT

FURNISHED

MILLER

CLUDED

AND

DISCLAIMED

MILLER.

Arc

welders,

power

sources

and

components

. .

year

Original

main

power

rectifiers

3years

EXCEPT

EXPRESSLY

PROV1DED

MILLER

(!abor

-1

year

only)

WRITING.

MILLER

PRODUCTS

ARE

INTENDED

FOR

All

welding

guns

and

feeder/guns

days

ULTIMATE

PURCHASE

COMMERCIALi

INDUSTRIAL

All

other

Millermatic

Feeders

year

USERS

AND

FOR

OPERATION

PERSONS

TRAINED

AND

Replacement

repair

parts,

exclusive

labor

days

EXPERIENCED

THE

USE

AND

MAINTENANCE

(

Batteries

6months

WELDING

EQUIPMENT

AND

Nor

FOR

CONSUMERS

CONSUMER

USE.

MILLER

WARRANTIES

NOT

EXTEND

provided

that

Miller

notified

iii

writing

within

thirty

(301

days

TO,

AND

RESELLER

AUTHORIZED

EXTEND

the

date

such

failure.

MILLERS

WARRANTIES

TO,

ANY

CONSUMER.

~-~

ERRATA

SHEET

After

this

manual

was

printed,

refinements

equipment

design

occurred.

This

sheet

lists

exceptions

data

appearing

later

this

manual.

AMENDMENT

SECTION

7

MAINTENANCE

TROUBLESHOOTING

Amend

Figure

7-1.

Circuit

Diagram

For

Weld

Control

(see

Page

this

Errata

Sheet)

Add

Figure

7-9.

Circuit

Diagram

For

Voltage

Regulator

Board

PC12

Circuit

Diagram

No.

A-123

556

Figure

7-9.

CircuIt

Diagram

For

Voltage

Regulator

Board

PC12

AMENDMENT

PARTS

LIST

(see

Page

this

Errata

Sheet)

-I

___

a



_________

rnGa

.C.I(D,

c31C1

flIt

Li~–ft~11ff~+~

~:~~~Ev

–



Sin



-~

14C1

~

Si~22-#

:o~

_______________

t.____...J0p....JZ.a~__.4

Ofi

0t

a~..

PTGfl0

Circuit

Diagram

No.

C-097

891-B

Figure

7-1.

CIrcuit

Diagram

For

Weld

Control

Effective

With

Serial

No.

JF947217

(f.

j~i



:Ui~

;fziii:1~

~~Jiii~

:L:

LT,i1

2_au:

]

TABLE

CONTENTS

Section

No.

Page

No.

SECTION

SAFETY

RULES

FOR

OPERATION

ARC

WELDING

POWER

SOURCE

Introduction

General

Precautions

-3.

Arc

Welding

Standards

Booklet

Index 6

SECTION

INTRODUCTION

General

Information

And

Safety

Receiving-Handling

Description

SECTION

INSTALLATION

3-1.

Location

Shielding

Gas

Connections

-3.

Water

Connections

Limit

Switch

Connections

AuxiliaryOutput

Connections

Weld

Control

Interconnections

Field

Installation

MHA-2

Hub

And

Spindle

Assembly

Installation

Spool-Type

Wire

3-10.

Installation

Reel-Type

Wire

-11.

Installation

Of Wire

Reel

3-12.

Adjusting

Hub

Tension

SECTION

DEFINITIONS

PROGRAM

TERMS

Program

Definitions

Alpha

Numeric

Display

Definitions

SECTION

OPERATOR

CONTROLS

Power

Emergency

Stop

Button

-2.

Run/Set

Switch

-3.

Jogging

Controls

-4.

Auxiliary

Output

Indicators

Alpha-Numeric

Display

Weld

Program

Indicators

Voltage

Reset

Button

Purge

Push

Button

Program

Select

Push

Button

5-10.

Program

Run

Push

Button

5-11.

Sequence

Advance

Push

Button

5-12.

Halt/Resume

Push

Button

SECTION

PROGRAMMING

Mini-Cassette

Tape

Operation

Programming

Module

Operation

Programming

Examples

Running

Program

SECTION

MAINTENANCE

TROUBLESHOOTING

Running

The

Diagnostic

Program

Inspection

And

Upkeep

Memory

Batteries

Troubleshooting

SECTION

SAFETY

RULES

FOR

OPERATION

OFARC

WELDING

POWER

SOURCE

1-i.

INTRODUCTION

learn

experience.

Learning

safety

through

personal

experience,

child

touching

hot

stove

harmful,

wasteful,

and

wise.

Let

the

experience

others

teach

you.

Safe

practices

developed

from

experience

the

use

welding

and

cutting

are

described

this

manual.

Research,

development,

and

field

experience

have

evolved

reliable

equipment

and

safe

installation,

opera

tion,

and

servicing

practices.

Accidents

occur

when

equipment

improperly

used

maintained.

The

reason

for

the

safe

practices

may

not

always

given.

Some

are

based

common

sense,

others

may

require

technical

volumes

explain.

wiser

the

rules.

Read

and

understand

these

safe

practices

before

tempting

install,

operate,

service

the

equipment.

Comply

with

these

procedures

applicable

the

par

ticular

equipment

used

and

their

instruction

manuals,

for

personal

safety

and

for

the

safety

others.

Failure

observe

these

safe

practices

may

cause

serious

injury

death.

When

safety

becomes

habit,

the

equipment

can

used

with

confidence.

These

safe

practices

are

divided

into

two

Sections:

General

Precautions,

common

arc

welding

and

cutting;

and

Arc

Welding

(and

Cutting)

(only).

Reference

standards:

Published

Standards

safety

are

also

available

for

additional

and

complete

pro

cedures

than

those

given

this

manual.

They

are

listed

the

Standards

Index

this

manual.

ANSI

Z49.1

the

most

complete.

The

National

Electrical

Code,

Occupational

Safety

and

Health

Administration,

local

industrial

codes,

and

local

inspection

requirements

also

provide

basis

for

equip

ment

installation,

use,

and

service.

1-2.

GENERAL

PRECAUTIONS

Different

arc

welding

process..,

slectrode

alloy.,

and

fluxes

can

produce

different

fumes,

gases

and

radiation

levels.

addition

the

Information

this

manual,

sure

consult

flux

and

elec

trode

manufacturers

for

specific

technical

data

and

precautionary

measures

concerning

their

matenal.

Burn

Prevention

Wear

protective

clothing

gauntlet

gloves

designed

for

use

welding,

hat,

and

high

safety-toe

shoes.

Button

shirt

collar

and

pocket

flaps,

and

wear

cuffless

trousers

avoid

entry

sparks

and

slag.

Wear

helmet

with

safety

goggles

glasses

with

side

shields

underneath,

appropriate

filter

lenses

plates

(protected

clear

cover

glass).

This

MUST

for

welding

cutting,

(and

chipping)

protect

the

eyes

from

radiant

energy

and

flying

metal.

Replace

cover

glass

when

broken,

pitted,

spattered.

See

-3A.2.

Avoid

oily

greasy

cjothing.

spark

may

ignite

them.

Hot

metal

such

electrode

stubs

and

workpieces

should

never

handled

without

gloves.

Medical

first

aid

and

eye

treatment.

First

aid

facilities

and

qualified

first

aid

person

should

available

for

each

shift

unless

medical

facilities

are

cjose

for

mediate

treatment

flash

burns

the

eyes

and

skin

burns.

Ear

plugs

should

worn

when

working

overhead

confined

space.

hard

hat

should

worn

when

others

work

overhead.

Flammable

hair

preparations

should

not

used

per

sons

intending

weld

cut.

Toxic

Fume

Prevention

Severe

discomfort,

illness

death

can

result

from

fumes,

vapors,

heat,

oxygen

enrichment

dep(etion

that

welding

(or

cutting)

may

produce.

Prevent

them

with

adequate

ventilation

described

ANSI

Stan

dard

Z49.

listed

Standards

index.

NEVER

ventilate

with

oxygen.

Lead

cadmium

zinc

mercury

and

beryllium

bearing

and

similar

materials,

when

welded

(or

cut)

may

produce

harmful

concentrations

toxic

fumes.

Ade

quate

local

exhaust

ventilation

must

used,

each

person

the

area

well

the

operator

must

wear

air-supplied

respirator.

For

beryllium,

both

must

ed.

Metals

coated

with

containing

materials

that

emit

toxic

fumes

should

not

heated

unless

coating

removed

from

the

work

surface,

the

area

well

ven

tilated,

the

operator

wears

air-supplied

respirator.

Work

confined

space

only

while

being

ven

tilated

and,

necessary,

while

wearing

air-supplied

respirator.

Gas

leaks

confined

space

should

avoided.

Leaked

gas

large

quantities

can

change

oxygen

con

centration

dangerously.

not

bring

gas

cylinders

into

confined

space.

Leaving

confined

space,

shut

OFF

gas

supply

source

prevent

possible

accumulation

gases

the

space

downstream

valves

have

been

accidently

opened

left

open.

Check

sure

that

the

space

safe

before

re-entering

it.

Vapors

from

chlorinated

solvents

can

decomposed

the

heat

the

arc

(or

flame)

form

PHOSGENE,

OM-1537

Page

highly

toxic

gas,

and

other

lung

and

eye

irritating

pro

ducts.

The

ultraviolet

(radiant)

energy

the

arc

can

also

decompose

trichioroethylene

and

per

chloroethylene

vapors

form

phosgene.

DO NOT

WELD

cut

where

solvent

vapors

can

drawn

into

the

welding

cutting

atmosphere

where

the

radiant

energy

can

penetrate

atmospheres

containing

even

minute

amounts

trichioroethylene

per

chioroethylene.

Fire

and

Explosion

Prevention

Causes

fire

and

explosion

are:

combustibles

reached

the

arc,

flame,

flying

sparks,

hot

slag

heated

material;

misuse

compressed

gases

and

cylinders;

and

short

circuits.

AWARE

THAT

flying

sparks

falling

slag

can

pass

through

cracks,

along

pipes,

through

windows

doors,

and

through

wall

floor

openings,

out

sight

the

goggled

operator.

Sparks

and

slag

can

fly

feet.

prevent

fires

and

explosion:

Keep

equipment

clean

and

operable,

free

oil,

grease,

and

(in

electrical

parts)

metallic

particles

that

can

cause

short

circuits.

combustibles

are

area,

NOT

weld

cut.

Move

the

work

practicable,

area

free

combustibles.

Avoid

paint

spray

rooms,

dip

tanks,

storage

areas,

yen

tilators.

the

work

cannot

moved,

move

corn-

bustibles

least

feet

away

out

reach

sparks

and

heat;

protect

against

ignition

with

suitable

and

snug-fitting,

fire-resistant

covers

shields.

Walls

touching

combustibles

opposite

sides

should

not

welded

(or cut).

Walls,

ceilings,

and

floor

near

work

should

protected

heat-resistant

covers

shields.

Fire

watcher

must

standing

with

suitable

fire

tin~uishing

equipment

during

and

for

some

time

after

welding

cutting

if:

appreciable

combustibles

(including

building

construction)

are

within

feet

appreciable

combustibles

are

further

than

feet

but

can

ignited

sparks

openings

(concealed

visible)

floors~

walls

within

feet

may

expose

com

bustibles

sparks

combustibles

adjacent

walls,

ceilings,

roofs,

metal

partitions

can

ignited

radiant

conducted

heat.

Hot

work

permit

should

obtained

before

operation

ensure

supervisors

approval

that

adequate

precautions

have

been

taken.



After

work

done,

check

that

area

free

sparks,

glowing

embers,

and

flames.

empty

container

that

held

combustibles,

that

can

produce

flammable

toxic

vapors

when

heated,

must

OM-1537

Page

never

welded

cut,

unless

container

has

first

been

cleaned

described

AWS

Standard

A6.O,

listed

Standards

index.

This

includes:

thorough

steam

caustic

cleaning

(or

solvent

water

washing,

depending

the

com

bustibles

solubility)

followed

purging

and

inerting

with

nitrogen

carbon

dioxide,

and

using

protective

equipment

recommended

A6.O.

Waterfilling

just

below

working

level

may

substitute

for

inerting.

container

with

unknown

contents

should

cleaned

(see

paragraph

above).

NOT

depend

sense

smell

sight

determine

safe

weld

cut.

Hollow

castings

containers

must

vented

before

welding

cutting.

They

can

explode.

Explosive

atmospheres.

Never weld

~ut

where

the

air

may

contain

flammable

dust,

gas,

liquid

vapors

(such

gasoline).

Compressed

Gas

Equipment

Standard

precautions.

Comply

with

precautions

this

manual,

and

those

detailed

CGA

Standard

P-i,

PRECAUTIONS

FOR

SAFE

HANDLING

COMPRESSED

GASES

CYLINDERS,

listed

Standards

index.

Pressure

Regulators

Regulator

relief

valve

designed

protect

only

the

regulator

from

overpressure;.

not

intended

protect

any

downstream

equipment.

Provide

such

protection

with

one

relief

devices.

Never

connect

regulator

cylinder

containing

gas

other

than

that

for

which

the

regulator

was

designed.

Remove

faulty

regulator

from

service

immediately

for

repair

(first

cylinder

valve).

The

following

symptoms

indicate

faulty

regulator:

Leaks

gas

leaks

externally.

Excessive

Creep

delivery

pressure

continues

rise

with

downstream

valve

closed.

Faulty

Gauge

gauge

pointer

does

not

move

off

stop

when

pressurized,

nor

returns

stop

after

pressure

release.

Repair.

NOT

attempt

repair.

Send

faulty

regulators

for

repair

manufacturers

designated

repair

center,

where

special

techniques

and

tools

are

used

trained

personnel.

Cylinders

must

handled

carefully

prevent

leaks

and

damage

their

walls,

valves,

safety

devices:

Avoid

electrical

circuit

contact

with

cylinders

cluding

third

rails,

electrical

wires,

welding

cir

cuits.

They

can

produce

short

circuit

arcs

that

may

lead

serious

accident.

(See

-3C.)

Coil

excess

hose

prevent

kinks

and

tangles.

ICC

DOT

marking

must

each

cylinder.

assurance

safety

when

the

cylinder

properly

handled.

Identifying

gas

content.

Use

only

cylinders

with

name

gas

marked

them;

not

rely

color

identify

gas

content.

Notify

supplier

unmarked.

NEVER

DEFACE

alter

name,

number,

other

markings

cylinder.

illegal

and

hazardous.

Empties:

Keep

valves

closed,

replace

caps

securely;

mark

MT;

keep

them

separate

from

FULLS

and

return

promptly.

Prohibited

use.

Never

use

cylinder

its

contents

for

other

than

its

intended

use,

NEVER

support

roller.

Locate

secure

cylinders

they

cannot

knocked

over.

Passageways

and

work

areas.

Keep

cylinders

clear

areas

where

they

may

struck.

Transporting

cylinders.

With

crane,

use

secure

sup

port

such

platform

cradle.

NOT

lift

cylinders

off

the

ground

their

valves

caps,

chains,

slings,

magnets.

NOT

expose

cylinders

excessive

heat,

sparks,

slag,

and

flame,

etc.

that

may

cause

rupture.

not

allow

contents

exceed

130F.

Cool

with

water

spray

where

such

exposure

exists.

Project

cylinders

particularly

valves

from

bumps,

falls,

falling

objects,

and

weather.

Replace

caps

securely

when

moving

cylinders.

Stuck

valve.

NOT

use

hammer

wrench

open

cylinder

valve

that

can

not

opened

hand.

Notify

your

supplier.

Mixing

gases.

Never

try

mix

any

gases

cylinder.

Neler

refill

any

cylinder.

Cylinder

fittings

should

never

modified

exchang

ed.

Protect

hose

from

damage

sharp

edges,

and

sparks,

slag,

and

open

flame.

Examine

hose

regularly

for

leaks,

wear,

and

loose

con

nections.

Immerse

pressured

hose

water;

bubbles

dicate

leaks.

Repair

leaky

worn

hose

cutting

area

out

and

splic

ing

(1-2D3).

NOT

use

tape.

Proper

Connections

Clean

cylinder

valve

outlet

impurities

that

may

clog

orifices

and

damage

seats

before

connecting

regulator.

Except

for

hydrogen,

crack

valve

momentarily,

pointing

outlet

away

from

people

and

sources

ignition.

VVipe

with

clean

lintless

cloth.

Match

regulator

cylinder.

Before

connecting,

check

that

the

regulator

label

and

cylinder

marking

agree,

and

that

the

regulator

inlet

and

cylinder

outlet

match.

NEVER

CONNECT

regulator

designed

for

particular

gas

gases

cylinder

containing

any

other

gas.

Tighten

connections.

When

assembling

threaded

con

nections,

clean

and

smooth

seats

where

necessary.

Tighten.

connection

leaks,

disassemble,

clean,

and

retighten

using

properly

fitting

wrench.

Adapters.

Use

CGA

adapter

(available

from

your

sup

plier)

between

cylinder

and

regulator,

one

required.

Use

two

wrenches

tighten

adapter

marked

RIGHT

and

LEFT

HAND

threads.

Regulator

outlet

(or

hose)

connections

may

iden

tified

right

hand

threads

for

oxygen

and

left

hand

threads

(with

grooved

hex

nut

shank)

for

fuel

gas.

Pressurizing

Steps:

Drain

regulator

residual

gas

through

suitable

vent

before

opening

cylinder

(or

manifold

valve)

turning

adjusting

screw

(clockwise).

Draining

prevents

cessive

compression

heat

high

pressure

seat

allowing

seat

open

pressurization.

Leave

adjusting

screw

engaged

slightly

single-stage

regulators.

Hose

Stand

side

regulator

while

opening

cylinder

valve.

Prohibited

use.

Never

use

hose

other

than

that

designed

for

the

specified

gas.

generalhose

identification

rule

is:

red

for

fuel

gas,

green

for

oxygen,

and

black

for

inert

gases.

Use

ferrules

clamps

designed

for

the

hose

(not

dinary

wire

other

substitute)

binding

connect

hoses

fittings.

copper

tubing

splices.

Use

only

standard

brass

fit

tings

splice

hose.

Avoid

long

runs

prevent

kinks

and

abuse.

Suspend

hose

off

ground

keep

from

being

run

over,

stepped

on,

otherwise

damaged.

Open

cylinder

valve

slowly

that

regulator

pressure

creases

slowly.

When

gauge

pressurized

(gauge

reaches

regulator

maximum)

leave

cylinder

valve

following

position:

For

oxygen,

and

inert

gases,

open

fully

seal

stem

against

possible

leak.

For

fuel

gas,

open

less

than

one

turn

permit

quick

emergency

shutoff.

Use

pressure

charts

(available

from

your

supplier)

for

safe

and

efficient,

recommended

pressure

settings

regulators.

Check

for

leaks

first

pressurization

and

regularly

there-after.

Brush

with

soap

solution

(capful

Ivory

OM-15Z17

Page

Protect

filter

plate

with

clear

cover

plate.

Liquid

equivalent

per

gallon

water).

Bubbles

dicate

leak.

Clean

off

soapy

water

after

test;

dried

soap

combustible.

User

Responsibilities

Remove

leaky

defective

equipment

from

service

mediately

for

repair.

See

User

Responsibility

statement

equipment

manual.

Leaving

Equipment

Unattended

gas

supply

source

and

drain

gas.

Rope

Staging-Support

Rope

staging-support

should

not

used

for

welding

cutting

operation;

rope

may

burn.

1-3.

ARC

WELDING

Comply

with

precautions

1-1,

1-2.

and

this

section.

Arc

Welding,

properly

done,

is.a

safe

process,

but

careless

operator

invites

trouble.

The

equipment

carries

high

currents

significant

voltages.

The

arc

very

bright

and

hot.

Sparks

fly,

fumes

rise,

ultraviolet

and

infrared

energy

radiates,

weldments

are

hot,

and

compressed

gases

may

ed.

The

wise

operator

avoids

unnecessary

risks

and

pro

tects

himself

and

others

from

accidents.

Precautions

are

described

here

and

standards

referenced

index.

Burn

Protection

Comply

with

precautions

1-2.

The

welding

arc

intense

and

visibly

bright,

Its

radia

tion

can

damage

eyes,

penetrate

lightweight

clothing,

reflect

from

light-colored

surfaces,

and

burn

the

skin

and

eyes.

Skin

burns resemble

acute

sunburn,

those

from

gas-shielded

arcs

are

severe

and-

painful.

DONT

GET

BURNED;

COMPLY

WITH

PRECAU

TIONS.

,1.

Protective

Clothing

Wear

long-sleeve

clothing

(particularly

for

gas-shielded

arc)

addition

gloves,

hat,

and

shoes

(1-2A).

necessary,

use

additional

protective clothing

such

leather

jacket

sleeves,

flame-proof

apron,

and

fire-

resistant

leggings.

Avoid

outergarments

untreated

cotton.

Bare

skin

protection.

Wear

dark,

substantial

clothing.

Button

collar

protect

chest

and

neck

and

button

pockets

prevent

entry

sparks.

Eye

and

Head

Protection

Protect

eyes

from

exposure

arc.

NEVER

look

electric

arc

without

protection.

Welding

helmet

shield

containing

filter

plate

shade

no.

denser

must

used

when

welding.

Place

over

face

before

striking

arc.

lrademark

Proctor

Gamble.

Cracked

broken

helmet

shield

should

NOT

worn;

radiation

can

pass

through

cause

burns.

Cracked,

broken,

loose

filter

plates

must

replaced

IMMEDIATELY.

Replace

clear

cover

plate

when

broken,

pitted,

spattered.

Flash

goggles

with

side

shields

MUST

worn

under

the

helmet

give

some

protection

the

eyes

should

the

helmet

not

lowered

over

the

face

before

arc

struck.

Looking

arc

momentarily

with

unprotected

eyes

(particularly

high

intensity

gas-shielded

arc)

can

cause

retinal

burn

that

may

leave

permanent

dark

area

the

field

vision.

Protection

Nearby

Personnel

Enclosed

welding

area.

For

production

welding,

separate

room

enclosed

bay

best.

open

areas,

surround

the

operation

with

low-reflective,

non-

combustible

screens

panels.

Allow

for

free

air

circula

tion,

particularly

floor

level.

Viewing

the

weld. Provide

face

shields

for

all

persons

who

will

looking

directly

the

weld.

Others

working

area.

See

that

all

persons

are

wearing

flash

goggles.

Before

starting

weld,

make

sure

that

screen

flaps

bay

doors-are

closed.

Toxic

Fume

Prevention

Comply

with

precautions

-2B.

Generator

engine

exhaust

must

vented

the

outside

air.

Carbon

monoxide

can

kill.

Fire

and

Explosion

Prevention

Comply

with

precautions

1-2C.

Equipments

rated

capacity.

not

overload

arc

welding

equipment.

may

overheat

cables

and

cause

fire.

Loose

cable

connections

may

overheat

flash

and

cause

fire.

Never

strike

arc

cylinder

other

pressure

vessel.

creates

brittle

area

that

can

cause

vuo~ent

rupture

lead

such

rupture

later

under

rough

handling.

Compressed

Gas

Equipment

Comply

with

precautions

1-20.

OM-1537

Page

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