WELDING INDUSTRIES
OF
AUSTRALIA
A DIVISION
OF
WELDING
INDUSTRIES
LTD
ACN
004
547
l
l
l
Head
Office
and International
Sales
5
Allan
Street,
Melrose Park
South
Australia, 5039
Telephone
(08)
8276 6494 Facsimile
(08)
8276 6327
OWNERS
MANUAL
WELDMATIC
TWO
ROLL DRIVE
ENCLOSED WIREFEEDER
MODEL NO.
W41-0,
REV.
B
12/98
QUALITY WELDING PRODUCTS,
SYSTE#S
AND SERVICE
4
Page
2
WELDMATIC
W414
WtREFEEDER MANUAL
The information contained in this manual is set out to enable you to properly
maintain your new equipment and ensure that you obtain maximum operating efficiency.
Please ensure that this information is kept in a safe place for ready reference when
required at any future time.
When requesting spare
parts,
please quote the model and serial number of the
machine and part number of the item required. All relevant numbers are shown in lists
contained in this manual. Failure to supply this information may result
in
unnecessary
delays in supplying the correct parts.
SAFETY
Before this equipment is put into operation, the Safe Practices section at the back
of the manual must be read completely. This will help to avoid possible injury due
to
misuse or improper welding applications.
PLASTIC HANDLE
intended for carrying the machine by hand only.
manner.
Please note that the handle fitted
to
the WELDMATIC W41-Q WIREFEEDER is
DO
NOT use this handle for suspending or mounting the machine in any other
CONTENTS
Sec.1
...................
Introduction
....................................................
P.3
Sec.2
...................
Receiving
.......................................................
P.3
Sec.4
...................
Wirefeeder Controls
......................................
P.4
Sec5
...................
Installation
.....................................................
P.5
Sec.6
...................
General Maintenance
....................................
P.6
Sec.7
...................
Wirefeeder Assembly
....................................
P.8
Sec.8
...................
Service Information
........................................
P.
18
Sec.9
...................
Parts
Lists
......................................................
P.
1
l
Sec.10.
................
Safe Practices
...............................................
P.
14
Sec.3
...................
Specifications
................................................
P.3
FIGURES
Fig.1
....................
Wirefeeder Controls
......................................
P.4
Fig.2
....................
Connection
to
Power Source
.........................
P.5
Fig.3
....................
W41-0 Wirefeeder Assembly
.........................
P.9
Fig.4
....................
Wirefeeder Circuit Diagram
...........................
P.10
Fig.5
....................
Gun Cable Assembly
.....................................
P.l
1
Fig.6
....................
Wire Drive Assembly
.....................................
P.12
Fig.7
....................
Inter-Connecting Lead Kit
..............................
P.
13
WELbMATiC
W414
WIREFEEDER
I_
MANUAL
-
Page
3
l,
INTRODUCTION
Gas Metal Arc Welding (G.M.A.W.) is basically a simple welding process, where a
consumable wire is fed
by
motor driven rollers to a welding gun and welding current
is
supplied from the wetding power source. The welding arc is struck between the work
piece and the end of the wire, which melts into the weld pool. The arc and the weld pool
are
both
shielded by gas flow from the gun, or
in
the case of ‘self shielded’ wires, by
gases generated by the wire core,
The process is quite versatile
in
that by selecting the correct wire composition,
diameter and shielding gas, it can be used for applications ranging from sheetmetal to
heavy plate, and metals ranging from carbon steel
to
aluminium alloys.
The WELDMATIC W41-0 WIREFEEDER has been designed to feed a range of
hard, soft, and flux-cored wires for the Gas Metal Arc Welding process. A compact motor
with integral gear
box
is coupled
to
a two roll drive assembly forming the basic
component of the wire feeder. The motor is controlled
by
an electronic speed control
which ensures excellent speed regulation over the full torque range of the motor, with
inherent compensation for supply voltage variations.
2.
RECEIVING
Check the equipment received against the shipping invoice
to
make sure the
shipment is complete and undamaged. If any damage has occurred in transit, please
immediately notify your supplier.
The W41
-0
package contains;
W41-0 Enclosed Wirefeeder.
H
AM286-0/10 Inter-connecting lead kit, 10 metre.
R
(This) Owners Manual.
3.
SPECIFICATIONS
SUPPLY
VOLTAGE
30
volts AC, (from welding power source)
RATED SUPPLY CURRENT
5
Amps
FUSE RATING
5
Amps
PRE-GAS RANGE
0
-
1.2 seconds
POST-GAS
RANGE
Q
-
2.5
seconds
BURNBACK RANGE
0
-
0.09
seconds
START SPEED Normal or Reduced (switchable)
DIMENSIONS L
-
610mm,
W
-
200mm,
H
-
420mm
MASS 33Kg (including Lead Kit)
SPOOL SIZES
5Kg,
15Kg
WIRESPEED RANGE
0
-
I90 RPM
(0
-
18 Metres per min.)
WIRE
SIZE
RANGE 0.9mm
-
1.2mm diameter (solid wire)
1.2mm
-
l
.6mm diameter (cored wire)
Page
4
WELDMATIC
W41-0
WIREFEEDER
MANUAL
4.
WIREFEEDER
CONTROLS
I
€3
c
FIGURE
l.
1.
WIRE SPEED CONTROL
WIRE
FEEDER
CONTROL§
This control sets the speed of the wire drive motor within the range of
0
-
I90
RPM,
equivalent to
0
-
18
metres per minute of welding electrode wire. Rotate the control
clockwise to increase the feed rate.
2.
POWER
ON
INDICATOR
the power source is switched on.
3.
SPOT TIME CONTROL
When operating the machine in Spot Weld mode, this control will
vary
the spot
weld time. Rotating the dial clockwise will increase the
spot
weld
time, in
the
range
0.5
-
2.5
seconds.
If
the Spot Weld mode is not required this feature can be turned
off
by
rotating the control anti-clockwise until
it
'clicks' into the minimum position.
4.
INTERVAL CONTROL
When operating the machine in Cycle Arc mode this control sets the period
between welds. The spot time control sets the welding period. Rotating the dial
clockwise will increase the interval time, in the range
0.5
-
2.5
seconds. If the Cycle Arc
mode is not required this feature can be turned
off
by
rotating both controls fully anti-
clockwise.
This indicator is illuminated when wirefeeder is connected to a power source and
5.
PRE-GAS CONTROL
This control sets the time period of gas flow before welding commences, and may
be adjusted from
0
-
1.2
seconds.
6.
POST-GAS
CONTROL
This control sets the time period
of
gas flow after welding ceases, and may be
adjusted from
0
-
1.2
seconds.
7.
BURNBACK CONTROL
released, and wirefeed ceases, and may be adjusted from
Q
-
0.7
seconds,
8.
START SPEED SWITCH
NORMAL
(up) is selected for immediate starts, as required for tacking, short welds, etc.
REDUCED
(down)
is
selected for softer starts, as required when welding aluminium, etc.
This control sets the time period that welding continues after the gun switch is
This switch controls the start up speed of the wirefeeder;
WELDMATIC W41-0 WIREFEEDER MANUAL
Page
5
INSTALLATION
The WELDMATIC W41-0 WIRE FEEDER is supplied with a lead kit consisting of:
WELDING
CABLE
WORK LEAD
CONTROL CABLE
GAS HOSE
Connections are shown
in
Figure 2. Check all connections are firmly made to
ensure good electrical contact, and to eliminate gas and air leaks.
Check that the wire guide and drive roller fitted is appropriate to the electrode wire
to be used. For optional, combinations, see Section
8.
Standard wirefeeders are factory
fitted with a W51-0/2 bottom roller, and plain top roller, which are suitable for both
0.9mm and 1.2mm diameter steel wire.
GAS
CYLINDER
&
REGULATOR
’WORK‘ CLAMP
-‘--/F
WELDING
CABLE
CONTROL CABLE
FIGURE
2.
CONNECTIONS
TO
POWER SOURCE
Paae
6
WELDMATIC W41-0 WIREFEEDER
MANUAL
7.
GENERAL MAINTENANCE
OPERATOR CHECKS
If the wire feeder motor will not turn when gun switch is operated and speed
control is set
to
desired speed, check the following points;
l,
Ensure that
30
Volts A.C. power
is
available at wirefeeder and Power
Indicator is lit. Check fuse located on power source front panel
(1
0
Amp) and
check fuse located on wirefeeder printed circuit board
(5
Amp).
2.
Fault may be either in gun switch or the switch wires
in
the gun cable. Check
connections
to
motor and visually check printed circuit board ensuring that all
components, wiring and electrical connections are secure.
If
wirefeeder fuses fail repeatedly while welding, check the following points;
l.
Check tension of spool holder or wire reel brake. Reel or spool should only
have sufficient pressure applied
to
prevent over run when motor stops.
2.
Ensure feed roll pressure
is
only sufficient
to
push wire evenly. Excessive
pressure can deform electrode wires.
3.
Ensure wire feed liner is clean. Blow out or replace if necessary.
4.
Ensure tip is free of obstructions, ream out if necessary. Replace tip when
5.
Ensure wire is straight and free of buckles.
6.
Ensure wire
is
free
of
rust, replace
if
necessary.
7.
Ensure feed roll gear teeth are free of interfering material.
oversize.
WELDMATIC W41-0 WIREFEEDER
MANUAL
Page
7
FITTING THE GUN CABLE
The BERNARD BEXT2-4E31OAE gun cable is equipped with a 'Euro' wirefeeder
connector which incorporates all required connection points
to
the gun cable for welding
current, shielding gas and gun switch control.
To
attach the gun cable
to
the wirefeeder mechanism, engage the mating parts of
the male and female Euro connectors, then rotate the locking ring clockwise to firmly
secure the connection.
FITTING THE CONSUMABLE WIRE
The quality of the consumable wire greatly affects how reliably a gas metal arc
welder will operate. For best results when welding mild steel, we recommend quality
WIA AUSTMIG ES6. Dirty, rusty or kinked wire will not feed smoothly through the gun
cable and will cause erratic welding. Deposits from the wire will clog the gun cable liner
requiring it
to
be replaced prematurely.
Place the spool of welding wire onto the spool holder. The location pin should mate
with a hole provided on the wire spool body. Fit the spool retaining
'R'
clip supplied.
Check the adjustment of the spool brake, which should be set to prevent over run of the
wire spool at the end of a weld, without unduly loading the wirefeed motor. The braking
can be adjusted by the Nyloc nut using a 15/16" AF or 24mm socket wrench.
FEEDING THE CONSUMABLE WIRE
With reference
to
Figure 6, release the pressure fixing arm (1 1
),
and rotate the
pressure arm
(8)
to
the open position. The end of the welding wire can now be passed
through the inlet guide, over the bottom driven roller, and into the output wire guide tube.
Check that the drive roller groove is correct for the wire in use. The appropriate size is
stamped on the visible side of the installed roller. Check also that the correct size
contact tip is fitted at the gun end. Drive roller and tip details are available in Section
8
of this manual.
Return the pressure arm to the closed position and adjust the compression screw
to provide sufficient clamping of the drive roll
to
achieve constant wirefeed. Do not over
tighten.
With the machine energised, operate the GUN SWITCH
to
feed wire through the
gun cable.
9C
W41-0
WIREFEEDER
MANUAL
7.
WELDMATtC
W41
-0
WIREFEEDER
ITEM
#
PART
#
DESCRIPTION
1
.......................
W41 -1
O...
......................
Wirefeeder Control PCB
2
.......................
W4 l-20Y
......................
Base Panel
3
.......................
W4 1-21Y
......................
Front Panel
4
.......................
W39-13Y
Back Panel
5
.......................
W39-14Y
.....................
.Top/Side Panel
6..
.....................
W39-15Y
......................
Door Panel
7..
.....................
W39-16Y
....................
..Divider Panel
8..
.....................
W41 -31Y
......................
Bridge Piece
9..
.....................
W50-l
...........................
Motor
&
2
Roll
Drive
10
.....................
TC396-7
.......................
Euro Gun Adaptor
11
.....................
CP101-0l18
..................
Gas Valve
12
.....................
W11-11/1
......................
Hose Tail (2)
13..
...................
OCL8
............................
‘0’
Clip 8mm
14
.....................
AM1 77
..........................
Spool
Holder Assembly
......................
Includes
14.1
...............
AM133-3
.......................
‘R’ Clip
15..
...................
W41 -26...
......................
Power Indicator Loom
Includes
15.
l
...............
W1 7-0/1 1
......................
Indicator Light
15.2
..............
.CP34-3612
....................
Wirespeed Potentiometer
16
.....................
W41 -27..
.......................
Control
Loom
Includes
16.1
...............
CP27-11/26
..................
Cycle Arc Potentiometers
(2)
17.
....................
W41 -28.
........................
Power Loom
18
.....................
HF200-1/15
..................
Mounting Foot (4)
19
.....................
MC36-56/21
..................
Male Bush
20
.....................
CP5-0/8
........................
Female Bush
21
.....................
H909
.............................
Cable Clamp
22
.....................
W41-0/1
........................
Hinge L.H.
23
.....................
W41-0/2
........................
Hinge
R.H.
24..
...................
W29-1/20..
....................
Slam Action Latch
(2)
25.
....................
W5-IOl19.
.....................
Potentiometer Knob. Small (2)
26
.....................
W1
1
-0/16..
...................
.Potentiometer Knob. Large
27
.....................
S140-0/1
.......................
Handle
28
.....................
WIN280
........................
Front Label
29
.....................
WIN273
........................
Side Label (2)
30
.....................
WIN
286
.......................
Internal Label
31
...................
..CP102-0/18
..................
PCB Support (4)
32.
....................
RUB1 6SQA
..................
Insulation Guard
Page
IO
WELDMATIC
W41-0
WIREFEEDER MANUAL
8.
SERVICE
INFORMATION
P;
3
W,
0
L
0
U
\
1""-
II
L
c
1
L""
-
""
FIGURE
4.
WIREFEEDER CIRCUIT DIAGRAM
WELDMATIC
W41-0
WIREFEEDER
MANUAL
Page
l1
9.
PARTS
LISTS
BEXT2-4E31OAE
GUN
ASSEMBLY
1
....
BE4392
..............
Nozzle
2
....
BE7497
..............
Contact Tip 0.6mm
......
BE7488
..............
Contact Tip 0.8mm
......
BE7489
..............
Contact
Tip
0.9mm
......
BE7490
..............
Contact Tip 1.2mm
3
....
BE4435
..............
Head
4
....
BE4423R
...........
Cap
5
....
BE4780
..............
Nut
Insulator
6
....
BE1370117
........
Insulator
7
....
BE1370116
........
Body Tube
8
....
BE1780006
........
Handle
Kit
9
....
BE5662
..............
Trigger
10
..
BE1880004
........
Screw
Kit
14
...
BE1480012
........
Cable 3M.
15
...
BE4E213B
.........
End Fitting
16
...
BE4305
..............
Cone Nut
17
...
BE2660001
........
Terminal
18
...
BE1520008
........
Clamp
19
...
BE252001 7
........
Strain Relief, Flexible
20
...
BE1470007
........
Bushing
21
...
BE1 8801 35
........
Strain Relief, Rigid
22
...
BE2280002
........
Screw
23
...
H2072
................
Insulated Link
24
...
BE4816
..............
Nut
25
...
BE5060
..............
Euro Block
26
...
BE4421
..............
'
0'
Ring
27
...
BE431 10
............
Liner
0.9
-
l
.2mm
To
replace liner: Disconnect gun cable assembly from the Euro adaptor on the
machine case, remove nozzle
(l)
and head
(3).
Withdraw old liner from the wirefeeder
end. Insert new liner and refit gun cable assembly to Euro adaptor
on
the machine
case.
At
the gun end, compress the liner within the gun cable, then cut it one contact tip length
past the end of the
body
tube
(7).
Refit head, tip and nozzle.
FIGURE
5.
BEXT2-4E31OAE
(300
AMP)
GUN
CABLE
ASSEMBLY
Page
12
WELDMATIC
W41-0
WIREFEEDER MANUAL
W50-0.
TWO
ROLL DRIVE ASSEMBLY
ITEM
#
PART
#
DESCRIPTION
l
..........
W50-0/11
......
Feed Plate
2
..........
W51 -0/15
.....
,Woodruffs Key 3x63
3
..........
W51-0/16
......
Circlip (2)
4
..........
W51-0/19
......
Parallel Key 4x4.8
5
..........
W51-O/2
........
Feed Roll 0.9mm+l.2mm
6
..........
W51-0/20
......
Fixing Cap
7
..........
W50-0/12
......
Shaft
8
..........
W5 Q-0/13
......
Pressure Arm
9
..........
W50-0/14
......
Shaft
IO
........
W51-0/37
......
Circlip
1
l
........
W50-0/15
......
Fixing Arm
12
........
W50-0/16
......
Calibrated Collar
13
.......
.W50-0/17
......
Pressure Spring
14
.......
.W50-0/18
......
Cap for Fixing Shaft
15
........
W51 -O/32
......
Circlip
(2)
16
........
W51 -0/33
......
Inlet Guide
17
.......
.W51 -0134
......
Wire Guide Tube
18
........
W51 -0/35
......
Motor
&
Gearbox
19
.......
.W50-0/19
......
Bearing D30
20
........
W50-0/20
......
Distance Ring
21
........
W50-0/21
......
Distance Ring
22
........
W50-0/22
......
Pressure Arm Spring
23
........
W50-0/23
......
Screw M6x12
(3)
24
........
W51-0/39
......
Circlip
25
........
W50-0124
......
Insulating Washer
(2)
26
........
W50-0/25
......
Insulating Washer
(2)
27
........
W50-0/26
......
Spring Pin
28
........
W51-0/40
......
Screw
M6x6
(3)
29
........
W50-0/27
......
Adaptor Ring
ALTERNATIVE PARTS
(IO)
.....
W51-0/3
........
Feed Roll 0.9mm+1.2mm
“U”
(IO)
.....
W51-0/1
........
Feed Roll 1.2mm+l.6mm Knurled
(IO)
.....
W51-0/4
........
Feed Roll 0.8mm+l .Omm
“V”
(IO)
.....
W51-0/5
........
Feed
Roll 0.6mm+0.8mm
“V”
FIGURE
6.
W50-0
TWO
ROLL
DRIVE
ASSEMBLY
AM286-8/40
INTER-CONNECTING
LEAD
KIT
ITEM
#
.................
PART
#................................DESCRIPTION
1
..........................
AM286-1/10
.........................
Work Lead
1
.l
........................
CABW35
.............................
Welding Cable
50mm*
Includes
1.2
........................
cx21
...................................
Plug
1.3
........................
C232-CM
.............................
Work Clamp
1.4
........................
H1423
..................................
Crimp Lug
2
..........................
AM286-2/1
Q
.........................
Weld Lead
2.1
........................
CABW35
.............................
Welding Cable
56mm*
Includes
2.2
........................
cx21
...................................
Plug
2.3
........................ HI422
..................................
Crimp Lug
3
..........................
AM282-3/10
.........................
Control Lead
3.1
........................
CAB4C32
............................
Cable 4 Core
3.2
........................
AMI 12-3/1
...........................
Control Plug
3.3
........................
H1972ET
.............................
Quick Connect Lug Female (4)
Includes
3.4
........................
HI 138
..................................
Insulator
(4)
4
..........................
AM282-4/10.
.......................
.Gas Hose
4.1
........................
6251 3
..................................
Gas
Hose 5mm
4.2
........................
OCL13
.................................
‘0’
Clip
1/2”
(2)
Includes
WELD
LEAD
CONTROL.
LEAD
8”3/3Q
GAS
HOSE
AM282-4/10
FIGURE
7.
AM286-0/10
INTER-CONNECTING
LEAD
KIT
Paae
14
WELDMATIC
W41-0
WIREFEEDER
MANUAL
IO.
SAFE PRACTICES WHEN USING WELDING EQUIPMENT
These notes are provided in the interests of improving operator safety. They should be considered
only as a basic guide
to
Safe Working Habits. A full list of Standards pertaining
to
industry
is
available
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.
WTlA
Technical Note
TN7-98
also provides a comprehensive guide
to
safe
practices in welding.
EYE PROTECTION
NEVER LOOK AT AN ARC WITHOUT PROTECTION. Wear a helmet with safety goggles or
glasses with side shields underneath, with appropriate filter lenses protected by clear cover lens. This is a
MUST
for welding, cutting, and chipping to protect the eyes from radiant energy and flying metal. Replace
the cover lens when broken, pitted, or spattered.
Recommended shade filter fens.
Amps
TIG
MMAW
MIG
Pulsed
MIG
0-100
............
10
.................
9
...................
10
.................
100-150
.........
11
.................
IO
.................
IO
.................
150-200
.........
12
.................
10-11
............
11-12
............
200-300
.........
13
.................
I1
.................
12-13
............
300-408
.........
14
.................
12
.................
13
.................
2-1
3
2-1
3
2-1 3
2-1
3
4
400-500
............................
"
13
.................
14
.................
14
500
+
..................................................
" "
14
.................
14
BURN PROTECTION.
The welding arc is intense and visibly bright.
Its
radiation can damage eyes, penetrate lightweight
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.
Wear protective clothing
-
leather or heat resistant gloves, hat, and safety-toe boots. Button shirt
collar and pocket flaps, and wear cuffless trousers to avoid entry
of
sparks and slag.
Avoid oily or greasy clothing. A spark may ignite them. Hot metal such as electrode stubs and work
pieces should never be handled without gloves.
Ear plugs should be worn when welding in overhead positions or in a confined space. A hard hat
should be worn when others are working overhead.
Flammable hair preparations should not be used by persons intending to weld or cut.
TOXIC
FUMES.
Adequate ventilation with air is essential. Severe discomfort, illness or death can result from fumes,
vapours, heat, or oxygen depletion that welding or cutting may produce. NEVER ventilate with oxygen.
Lead, cadmium, zinc, mercury, and beryllium bearing and similar materials when welded
or
cut may
produce harmful concentrations of toxic fumes. Adequate local exhaust ventilation must be used, or each
person in the area as well as the operator must wear an air-supplied respirator. For beryllium, both must
be used.
Metals coated with or containing materials that emit fumes should not be heated unless coating is
removed from the
work
surface, the area is well ventilated, or the operator wears an air-supplied
respirator.
Work in
a
confined space only while
it
is being ventilated and, if necessary, while wearing air-
supplied respirator.
WELDMATIC
W41-0
WIREFEEDER MANUAL
Page
15
Vapours from chlorinated solvents can be decomposed by the heat of the arc (or flame) to form
PHOSGENE, a highly toxic gas, and lung and eye irritating products. The ultra-violet (radiant) energy of
the arc can also decompose trichlorethylene and perchlorethylene vapours to form phosgene.
Do
not weld
or cut where solvent vapours can be drawn into the welding or cutting atmosphere or where the radiant
energy can penetrate to atmospheres containing even minute amounts of trichlorethylene or
percholorethylene.
FIRE AND EXPLOSION PREVENTION.
Be aware that flying sparks or falling slag can pass through cracks, along pipes, through windows or
doors, and through wall or floor openings, out of sight of the operator. Sparks and slag can travel up
to
10
metres from the arc.
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, do NOT weld or cut. Move the work
if
practicable, to
an area free of combustibles. Avoid paint spray rooms, dip tanks, storage areas, ventilators. If the work
can not be moved, move combustibles at least 10 metres away out of reach of sparks and heat; or protect
against ignition with suitable and snug-fitting fire-resistant covers or shields.
Walls touching combustibles on opposite sides should not be welded on or 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;
Combustibles (including building construction) are within
10
metres.
Combustibles are further than 10 metres but can be ignited by sparks.
Openings (concealed or visible) in floors or walls within
10
metres may expose combustibles to
sparks.
Combustibles adjacent to walls, ceilings, roofs, or metal partitions can be ignited by radiant or
conducted heat.
After work is done, check that area is free of sparks, glowing embers, and flames.
A tank
or
drum which has contained combustibles can produce flammable vapours when heated.
Such a container must never be welded on or cut, unless it has first been cleaned as described in
AS.1674-1974, the S.A.A. Cutting and Welding Safety Code. This includes a thorough steam or caustic
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. Water-filling just below working level may substitute for inerting.
Hollow castings or containers must 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
correctly connected and earthed.
If
unsure have machine installed by a qualified electrician. On mobile or
portable equipment, regularly inspect condition of trailing power leads and connecting plugs. Repair or
replace damaged leads.
Fully insulated electrode holders should be used.
Do
not use holders with protruding screws. Fully
insulated lock-type connectors should be used to join welding cable lengths.
Terminals and other exposed parts of electrical units should have insulated knobs or covers
secured before operation.
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