WELDMATIC
MODEL NO. CP6
600
CAT.
7524/6
6/80
FROM SERIAL NO.
THE INFORMATION CONTAINED IN THE FOLDER
YOU
TO PROPERLY MAINTAIN YOUR NEW EQUIPMENT AND ENSURE THAT
YOU OBTAIN MAXIMUP4 OPERATING EFFICIENCY.
PLEASE ENSURE THAT THIS FOLDER
READY REFERENCE WHEN REQUIREI?.
WHEN REQUESTING SPARE PARTS, QUOTE THE MODEIi NO. AND SERIAL
NO. OF THE MACHINE AND THE PART NO. OF THE ITEM REQUIRED.
FAILURE TO SUPPLY THIS INFORMATION WILL RESULT
DELAYS
IN
SUPPLYING THE CORRECT PARTS.
IS
6035
KEPT
IS
SET OUT TO ENABLE
IN
A SAFE PLACE FOR
IN
UNNECESSARY
WELDING INDUSTRIES OF AUSTRALIA PTY. LTD.
Melbourne
Adelaide
Launceston
429 4766
352 3022
31 7004
Newcastle
Brisbane
Darwin
61 1668
44 1391
81
6427 & 84 3076
Sydney
Perth
534 2144
361 7088
OPERATING
-
-
INTRODUCTION
GENERAL
AND
MAINTENANCE
WELDMATIC
INSTRUCTIONS
600 (CP6)
This manual has been prepared especially
izing personnel with the design, installation, operation,
maintenance, and troubleshooting
ation presented herein should
to
assure optimum performance
RECEIVING/HANDLING.
Prior
from. around the unit and carefully inspect for any damage that
may have occurred during shipment. Any
damage that m.ay have occurred in transit
purchaser with Welding Industries
authorised agent immediately
enclosed with Operating Instruction Manual).
When requesting irrbbrmation concerning this equipment,
essential
serial
SAFETY.
"
Before
section
This
welding applications.
to installing this equipment, clean
to
number.
the equipment
at
the
will
kelp
supply
back
avoid
correct
is
of
this manual
possible injury due
Model identification and machine
put into operation, the
of
this equipment.
be
given careful consideration
of
this
of
Australia Pty. Ltd.
(refer
to
MUST
for
use
equipment.
all
packing
claims
must
EQUIPMENT
BE
to
be
READ
misuse or improper
in
familiar-
All
material
for
loses
filed by the
WARRANTY
it
SAFETY
COMPLETELY.
PRACTICES
inform-
or
or
card
is
CONTENTS
General Description
Setting up for Operation
Welding Operation Instructions
Maintenance Instructions
Welding
Circuit Diagrams
Mobile
Safety
Guarantee
Kit
Practices
Data
Assem.bly
Card
-
Table
-
Parts
-
Assembly Drawing CP6-02
"C"
List
-
CP6-C9 10
CP6-02 Issue
-
4
Issue
2
PAGE
l
2-3
4
5-6
7
8
9
NO.
STANDARD
UNIT
The construction of the standard package plant has been designed
for installation and operating
such
as high production factories and general fabrication shops.
in
a
wide variety of applications,
"WELDMATIC"
l,
Constant Potential Rectifier Power Source.
2.
Semi-Automatic Wire Feeder.
3,
Welding
Plants consist of three basic
Gun
and Cable Assembly.
units:-
Separate operating and maintenance instructions are provided
for the wire feeder and gun cables.
1.
-
POWER
The standard
proof enclosure.
portation. For
SOURCE
C.P.
-
FEATURES
rectifier power source
Lifting
units
with
lugs
are provided for crane trans-
wheel mounting four solid rubber
is
housed
in
a
drip-
tyred wheels are provided: the two front wheels are steerable
permitting easy movement
is
provided
carrier
with
on
the
front
a support bracket and chain
volt plug socket is located
of gas preheater when welding
the front panel are
a
voltage selection switch, power
wire feeder
plug
socket and rectifier power outlet sockets.
in
restricted floor space.
of the machine and
on
the rear panel
with
C02
gas shield. Located
at
a
gas cylinder
the rear.
for
coarse voltage selection switch, fine
ON/OFF
switch, control fuses,
A
push
A
110
connection
bar
on
2.
CONSTRUCTION
The power source
ier
B.C.
Welder,
phase rectifier bridge. Connected
inductance
unit
is
a Constant Potential Silicon Diode Rectif-
with
a three phase transformer and
in
the
output circuit
providing the "inductance" or degree of slope
necessary for various welding currents. Cooling
con diodes, transformer windings and inductance
single phase axial fan. The power source
fan failure and overheating
by
thermostats mounted on diode
is
heat sinks.
3.
WELDING
Gas metal arc welding
can be carried
a) Semi-automatic
b)
Semi-automatic
c) "Hobart" spool
PROCESS
out
wire feeder model
wire feeder
gun welding
within
with
the capacity
tke
following equipment:-
with
unit
spot timer
model
of
W14.
SP9
controller.
d)
"Mini-mig" push and
4.
WELDING
CAPACITY
Power Source Capacity
pull
is
as follows:-
gun
and control.
a
three
is
of
the sili-
unit
is by a
protected against
the power source
W14-20.
with
CV2
an
600
Amps, 42 volts,
100%
duty
cycle.
5.
SUPPLY
AND
WELDING
"
-1
-2-
CABLES.
Power
Hertz
Sources
3
phase supply.
are
suitable for connection
The recommended fuse
cable
a)
b)
c)
6.
a) Welding
size
Fuse
Primary
Welding
SHIELDING
-
are
50
Cable
Cable
Grade
as
amp.
-
-
GASES.
C02
follows:-
4 core 77/0.40
998/0.30
thicknesses ranging
b)
Argon/C02
low
currents requiring minimum
and
for
c)
Argon/Oxygen and
ing
of
d)
Argon (pure)
7.
§ETTING
or
Argon/Oxygen mixtures
stainless
stainless
for
UP
UNIT
FOR
size,
for
steel
Argon/C02
a11
from
primary
T.R.S.
mild
lmm
welding.
mixtures
steel.
all
aluminium. welding.
OPERATION.
cable
T.R.S.
and alloy
upwards.
for
of
spatter on sheet
to
a
415 volt 50
size and welding
steel
all
applications on
for
prime
quality
welding in
steel
weld-
a) - General
The
Rectifier
ted.
Bolt
Assembly
Welder
on
the
of
is
wheel
Packaqed
shipped
assemblies
wheels nearest the front panel and push
wire
post
Locate
fibre
Feeder"
apply
b)
Note:
The power source
hertz,
ained
tion
side
machines and
cable
yellow) must
the machine adjacent
feeder mounting
in
the
special
the
Wire
thrust washer
is
free
a
small
Connection
This
3
work
phase
before
terminals
panel.
connections. The
is
supplied,
swivel mount
Feeder on the swivel mount, ensuring that the
is
on the
to swivel in
am.ount
to
of
graphite
Mains Supply.
should only
is
designed
supply
and
the
connecting the machine.
in
machine may
Use
a
flexible 4
clamp
be
cable
to
ensure that
earth
securely fastened to
to
the supply connection terminals.
Plant
with
locate
at
pivot
all
directions.
grease
be
done by
for
connection
(Refer
the
with
the
pin.
Drawing
skids
the
steerable
bar.
If
the vertical
rear
to
a
of
Check
If
shaft.
qualified electrician.
to
supply voltage should
Access
be
gained by door in right hand
core
(or
primary
there
ground) connection (green/
the
to
cable
is
'earth'
AM1.16)
or
wheels
(swivel)
a
"Mini-Boom"
boom
the machine.
that
the
necessary
415 volt,
be
ascert-
supply connec-
for
portable
no strain on
terminal
unbol-
"Wire
50
on
CAUTION
socket:
machine
Before
inserting primary
ensure that
is
in
'OFF'
switch
on
position.
both
cable
plug
plug in mains supply
socket
and welding
c)
"
CONNECTION
With unit switched
from
feeder
power
to
gas
tightened firmly.
into
into
with
as
110
socket
set
to
prevent gun
volt
screw
and "Gun Switch"
d)
WELDING
All
G.M.A.
"positive"
(D.C.R.P.)
socket on
machine
("negative") should
OF
CABLES/HOSES,
'OFF'
source to
wire
regulator/flowmeter, ensuring
If
C02
of
socket
wire
at
rear of
feeder
provided.
leads
CABLES.
welding
pole
comrn.only known
cable
is
from swivelling. Connect
to
done
therefore, connect the short jumper
to terminal lug on gun
be
plugged into
machine. The plugs of the welding
in the
error,
have
the
power
in accordance
able
sockets,
welding should not
been
power
cable,
from
secured. The
source, in
gas
with
stock
to
prevent accidental disconnection.
wire
which
hose
is
and control
the
desired
9
m.etres.
-
3-
ETC.
connect control
feeder.
Gas
Shield
Connect
unit.
cable
gas
all
is
being used, plug
Next
insert gun
(6
hose from
connections
output guide and retain in place
Set
screw
should not
be
respective sockets.
with
electrode
as
D.C.
wire
connected to
reverse polarity
lead
cable.
the
'I-''
socket on
be
attempted
feeder may
case,
cables
extension
cable
must
be
until all connections
be
installed
lead
(four
sets
core)
length. Standard length
pin plug)
wire
are
heater
cable
tightened
"Gas
Hose"
from
so
'I+''
The work lead
the
fully inserted
To
avoid
remote
from
comprising
are required
avail-
3)
Fit
WIRE
a
FEEDER
spool
of
AND
wire
GUN
to
CABLE.
the
wire
Feeder Instruction Manual"). Tighten the
a
slight braking
to
hand
rolls
the
prevent "over-run" when
and
diameter
feeder manual
inlet
effect
wire
and type
for
correct
is
felt when turning the
guide should
of
wire
being used.
selection
guides.
0.8mm.
0.9mm
1.2mm
The
gun
tip
and
both
are
=
0.030"
=
0.035"
=
0.045"
cable
and gun
liner spring
correct
are
for
size for
1.6m
2.4m
3.2m
wire
=
=
=
normally delivered with
size
wire
feeder
wire
1/16"
be
of
feed
selected
wire
3/32"
1/8"
nominated, but
being used.
(see
stops.
notes in
"brake"
wire
in accordance
Refer
feed
"Wire
screw
until
spool
The
wire
to
current
rolls
and input
the contact
check
that
by
drive
with
wire
-4-
WELDING
8.
Unit
ina,
SINGLE
is
the followins "functions check''
FUNCTION
now
ready
poGer source and check
plugs
"positive"
are
inserted
,
work
"negative". Check
OPERATION
CHECK
for
operation, but
air
in
the
flow.
correct
INSTRUCTIONS
prior
is
See
that
polarity
all
t
recommended,
all
sockets
welding connections
and plugs for tightness particularly "work"
Next
connected and that
socket
ator
and check contents gauge
Press
welding requirements,
adequate
wire
correct
to
ensure that
at
rear
light should now
"Gas
Purge" switch and
from
speed.
pressure on drive
all
Gas
of
power
gun nozzle,
Press
control
Heater
show
at
"wire
cables
(for
and
C02
source. Switch on
"Power On". Open
for
adequate gas supply.
set
gas flow in accordance with
the
same
Set
time
"wire
speed" control
inch" switch and check
rolls.
Pressure should
gas
only)
wire
check that
prevent any ''slip" when feeding through gun and cable.
o
commen
welding lead
clamp.
hoses
is
Gas
are
plugged into
feeder,
cylinder fully
gas
wire
be
cing
weld-
switch on
-
electrode
securely
indic-
flow
to
desired
feed
sufficient
is
for
Next,
close
welding
accordance
now ready
The
welding current
The electrode
drive rolls through the gun
unchanged
higher the
be
indicated by
source, indicated by the voltmeter when
is
divided into
Selector
The CP6
six
steps,
inductance terminal
should
not
ing on the type
are
required. The typical
gun switch momentarily
power
check.
with
for
welding.
wire
except
wire
required
is
is
when
speed,
the
ammeter.
a
number
switches.
has
Coarse
giving
Voltage
36
sockets
be
used for welding currents
of
welding conditions, various inductance values
for
wire
Set
the voltage
voltage
(see
selector
welding
determined automatically by
fed
at
the pre-selected
reset
cable
by the
to
"Wire
the
arc
Speed"
the higher the welding current,
The
output voltage
the
of
voltage
steps
and
settings for the machine. The
are
by
Coarse
Fine Voltage Switches, each with
numbered
''1
over
weld
setting chart indicates the
recommended sockets for various welding conditions.
rule, low welding currents require inductance
aluminium and tubular flux cored
is
used exclusively.
wires,
inductance socket
feed,
gas
flow
switches in
table),
speed
unit
"Wire
by the
at a constant
control. The
as
of
the power
gun switch
Selector
-
4".
300
amps.
No.
1
and Fine
No.1
As
or
is
2.
and
is
Speed".
speed,
will
closed,
socket
Depend-
a
general
For
No.
2
-5-
The following sequence
of
weld setting
is
recommended:-
a) Consult typical weld setting chart.
b)
Select welding current most suited
to
the application
by
following the settings of wire speed and voltage shown on the
setting chart.
To
"tune" each weld setting, adjust wire
speed only.
c) If voltage
will
will
transfer
d)
occur, particularly at start of weld and weld contour
be very convex.
will
With
welding current and voltage matched the result
be an optimum tuned welding condition
is
too low for the application, wire "stubbing"
If
be erratic
the voltage
with
excess spatter.
is
too high, metal
with
a smooth spatter-
will
free arc.
10.
In
mostats on the diode heat sinks
welding. The thermostats
the cooling fan operating
utes.
over-heating such
SAFETY
the event
A
DEVICES
of
the power source becoming overheated the ther-
will
this
will
will
automatically reset and
operate preventing further
take approximately
check should be made to ascertain the reason for the
as
fan not operating or air flow restricted.
with
10
min-
Fuses provided for all circuits are as follows and are
indicated on the front panel:-
El
E2
E3
E4
-
-
-
-
3
3
5
5
amps
amps
amps
amps
(Delayed
(
'l
(
'I
(
'I
action)
'I
'I
'I
1
1
1
11
.
ENT
a)
Power Source
Fuse
Fuse
Fuse
Fuse
ENANC E
Apart from the fan the rectifier has no rotary components.
To achieve complete dissipation of heat from the active components, the rectifier should be thoroughly blown off
dry
compressed air after
be carried out at shorter intervals if
6
months' operation. Cleaning should
dust
accumulation
with
is
considerable.
Prior
and
source
b)
to
cleaning, remove the
the fixing screws. Thus
will
bs
accessible.
The wire feed motor/gearbox
unit
a11
cover
by
detachment
the components of the power
is
pre-packed
with
grease and
of
needs no other lubrication. Change the grease after approx-
im.ately
Manual
The drive rollers
clean.
with
14,000
service hours. (see Wire Feeder Instruction
.
and
If
necessary,
compressed air.
the inner
blow
off
wire
guides
the inside
should
of
the
be kept
wire feeder
lugs
c)
Gun and
Remove any
that
of
the
the
and/or burnt
Cag
spatter
shielding gas outflow
contact tubes should
tubes
operation and should
which
are
an impediment
be
replaced immediately.
-6-
might
be
adhere
is
not
to
the
impeded.
nozzle
regularly checked.
to
trouble-free welding
bore
The
condition
Damaged
so
Trouble-free operation
condition and cleanliness
uctions on Gun
12.
WELDING
Never observe
tance that the
Cables).
OPERATION
the
arc
welder
depends
of
with
wear
unprotected eyes.
protective clothing providing
sufficient safety.
13.
The machine should
STOPPAGES
AND
THEIR
be
ELIMINATION
checked only by
ician.
If
the
are
initiated by
the
supply
unit stops working,
the
mains
cable
(loose connection,
first
(for
unit proper.
If
the three terminals
board
are
correctly connected to
L1,
L2
the cause of the stoppage must
The wiring diagram on the next pages
location
of
the
defect.
to a large extent on
the inner
wire
a
fully
liner
It
skilled
(See
is
the
Instr-
of impor-
electr-
determine whether stoppages
instance, burnt fuse)
cable
and
L3
on
the mains (voltmeter reading)
be
sought in the unit
will
break)
the
primary terminal
or by
facilitate the
or
the
itself.
good
by
-7-
WELDING
Shielding Gas
is
welding
Contact Tip 1.5m inside
9m.m
up
to
200
amps.
DATA
12
-
Grade
of
Gas Nozzle.
-
19mm
TYPICAL
C02
used
over
200
are a guide only for initial machine setting and finer
adjustments may be necessary
characteristics for
setting method
is
to
the
application. Recommended machine
set
Flow as per Table then adjust
to
Voltage
wire
achieve optimum welding
Switches,
speed to obtain recommended
current.
Wire
:ect-
fier
JP6
Wire
Size Gas
0.9m
Lit./Min
10
(Solid
Speed
Metres
Per
Min.
3.9
6.3
Coarse
2
2
Wire)
1.2m.
(Solid
Wire)
2.2
3.2
4.4
2
3
3
VALUES
with
Wire
a
Gas
"Stick
amps. These Tables
Inductance and Gas
-
Preheater.
Out"
6
Volt
18
21
20
21
22
-
NOTE:
(for
vertical Down)
15
1.6mm
(Fluxo-
fil)
15/17
Lit./Min.
2.0m.
(Fluxofil)
2
.
4mrn
(Fluxofil)
Wire
speed
is
calibration settings.
Lit./Min
shown
5.7
5.8
7.6
9.0
10.0
5.1
6.4
5.5
6.6
in
metres/minute and are not dial
3
3
4
5
5
5
5
5
6
4
4
2
2
3
4
5
6
1
1
2
3
2
2
2
2
2
2
190
200
250
330
360
380
450
500
550
23.5
26
27
31
32
33
34
34
35
8
-
I
TEP
NO.
-
2
2.1
2.2
2.3
3
3.1
4
4.1
4.2
5
S
DRAWING
PART
CP6-5
CP6-5/2
CP6-5/3
CP3-9/8
CP6-8
CP6-19
CP6-2
CP6-7/1
CP6-7/2
CP25-0/7
CP3-0/4
NO.
NO.
CP6-02
DESCRIPTION
RECTIFIER ASSEMBLY
DIODE
DIODE (R)
R?.!lOS
THE
,
TRANSFORMER ASSEMBLY
PRIMARY/SECONDARY COIL
INDUCTANCE ASSEMBLY
LEFT
RIGHT
CONTROL TRANSFORMER
FAN
TAT
HAND
HAND
BLADE
-
SPARE PARTS LIST ISSUE
INDUCTANCE COIL
INDUCTANCE COIL
5.
9
18
21
22
24
25
26
26.1
27
28
29
30
32
33
34
37
38
14235-0/6
CP15-0/7
CP5-25
CP5-0/19
AM1
6
CP15-0/14
TC262
TC262N
CP3-0/47
CP6-0/35
w1-22
CP6-0/47
CP5-0/13
CP5-0/14
CP5-0/15
W1-23
CP22-3/13
FAN
MOTOR
GAS
HEATER PLUG SOCKET
RECTIFIER PROTECTION ASSEMBLY
WELDING CONTACTOR
OUTPUT TERMINALS
CONTROL PLUG
GAS
NIPPLE
GAS
NIPPLE NUT
VOLTMETER 0-60V.
AMPETER 0-800A.
INDICATOR LIGHT
APNTER SHUNT 0-800A
POWER
COARSE VOLTAGE SWITCH
FINE VOLTAGE SWITCH
FUSE HOLDER
STAND
ONYOFF
OFF
SWITCH
INSULATOR
39
40
37.1
37.2
CP6-20
CP6-21
K10
K11
RESISTOR
SERIES RESISTOR
3AG.
3AG.
3A
DELAY FUSE
5A
DELAY FUSE
9
"@
JVO
I
I
0
W
MU
0
,
l
1
t
"
3
tR
?-
7
"
l,
0 0
b
6
0
0
C
SAFE
PRACTICES
IN
UStNG
WELDING
EQUIPMENT
These notes are provided in the interests
to
only as a basic guide
from the Standards Association of Australia, also various State Electricity Authorities, Departments of
Labour and Industry or Mines Department and other Local Health or Safety Inspection Authorities may
have additional requirements.
Safe Working Habits. A full list
of
improving operator safety. They should be considered
of
Standards pertaining
to
industry is available
EYE PROTECTION
NEVER
with side shields underneath, with appropriate filter lenses protected by clear cover glass. This is a
MUST for welding, cutting, and chipping to protect the eyes from radiant energy and flying metal.
Replace the cover glass when broken, pitted, or spattered.
LOOK
AT
AN ARC WITHOUT PROTECTION. Wear a helmet with safety goggles or glasses
WELDING
Below
75
200 - 400
Above
30
CURRENT
30
-
75
Amps
-
200
400
Amps
.......................................
.........................................
Amps
.......................................
Amps
......................................
Amps
.....................................
SHADE
NUMBER
6
8
10
12
14
BURN PROTECTION.
The welding arc is intense and visibly bright.
clothing, reflect from light-coloured surfaces, and burn the skin and eyes. Burns resulting from gas-
shielded arcs resemble acute sunburn, but can be more severe and painful.
Its
radiation can damage eyes, penetrate lightweight
Wear protective clothing - leather or heat resistant gloves, hat, and safety-toe boots. Button shirt
collar and pocket flaps, and wear cuffless trousers
Avoid oily or greasy clothing. A spark may ignite them. Hot metal such as electrode stubs and
workpieces should never be handled without gloves.
Ear plugs should be worn when welding
should be worn when others are working overhead.
Flammable hair preparations should not
TOXIC
fumes, vapors, heat,
oxygen.
may produce harmful concentrations of toxic fumes. Adequate local exhaust ventilation must be used,
or
both must be used.
removed from the work surface, the area
respirator.
FUME
Adequate ventilation with air is essential. Severe discomfort, illness or death can result from
Lead, cadmium, zinc, mercury, and beryllium bearing and similar materials when welded or cut
each person in the area as well as the operator must wear an air-supplied respirator.
Metals coated with or containing materials that emit fumes should not be heated unless coating is
PREVENTION.
of
oxygen depletion that welding or cutting may produce. NEVER ventilate with
to
avoid entry of sparks and stag.
in
overhead positions or in a confined space. A hard hat
be
used by persons intending to weld or cut.
For
beryllium,
is
well ventilated, or the operator wears an air-supplied
Work in a confined space only while
supplied respirator.
it
is
being ventilated and,
if
necessary, while wearing air-
Vapours from chlorinated solvents can be decomposed by the heat of
PHOSGENE,
a highly toxic gas, and lung and eye irritating products. The ultra-violet (radiant) energy
the arc can also decompose trichlorethylene and perchlorethylene vapors
the
arc (or flame)
to
form phosgene.
to
Do
form
of
not
weld or cut where solvent vapors can be drawn into the welding or cutting atmosphere or where the
radiant energy can penetrate
atmospheres containing even minute amounts
of
trichlorethylene or
to
percholorethylene.
FIRE
AND
EXPLOSION
PREVENTION.
Be aware that flying sparks or falling slag can pass through cracks, along pipes, through windows
or
or doors, and through wall
to
10
metres from the arc.
floor openings, out of sight of the operator. Sparks and slag can travel up
Keep equipment clean and operable, free of oil, grease, and (in electrical parts) of metallic
particles that can cause short circuits.
If
combustibles are present in the work area,
an area free of combustibles, Avoid paint spray rooms,
can not be moved, move combustibles at least
do
NOT
weld or cut. Move the work
dip
tanks, storage areas, ventilators. If the work
10
metres away out of reach of sparks and heat; or
if
practicable,
to
protect against ignition with suitable and snug-fltting fire-resistant covers or shields.
or
Walls touching combustibles on opposite sides should not be welded on
cut. Walls, ceilings,
and floor near work should be protected by heat-resistant covers or shields.
A
person acting as Fire Watcher must be standing by with suitable fire extinguishing equipment
during and for some time after welding or cutting
if;
R
Combustibles (including building construction) are within
m
Combustibles are further than
R
Openings (concealed or visible) In floors or walls within
to
sparks.
m
Combustibles adjacent
to
10
metres but can be ignited by sparks.
walls, ceilings, roofs, or metal partitions can be ignited by radiant
10
metres.
10
metres may expose combustibles
or
conducted heat.
After work is done, check that area is free
of
sparks, glowing embers, and flames.
An tank or drum which has contained combustibles can produce flammable vapors when heated.
It
Such a container must never be welded on or cut, unless
AS.
1674-1 974,
the
S.A.A.
Cutting and Welding Safety Code. This includes a thorough steam or caustic
has first been cleaned as described in
cleaning (or a solvent or water washing, depending on the combustible’s solubility), followed by
purging and inerting with nitrogen or carbon dioxide, and using protective equipment as recommended
in
AS.1674-1974.
Hollow castings or containers must
Water-filling just below working level may substitute for inerting.
be
vented before welding or cutting. They can explode. Never
weld or cut where the air may contain flammable dust, gas, or liquid vapours.
SHOCK
PREVENTION.
Exposed conductors or other bare metal in the welding circuit, or ungrounded electrically alive
equipment can fatally shock a person whose body becomes a conductor. Ensure that the machine is
If
correctly connected and earthed.
or portable equipment, regularly inspect condition
unsure have machine installed by a qualified electrician. On mobile
of
trailing power leads and connecting plugs.
Repair or replace damaged leads.
Do
Fully insulated electrode holders should be used.
to
Fully insulated lock-type connectors should be used
join welding cable lengths.
not use holders with protruding screws.
Terminals and other exposed parts of electrical units should have insulated knobs or covers
secured before operation.
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