CIGWELD TRANSarc 170i Specifications

Operating Manual
719448
Issue 6
0504
Transarc 141VRD, 161VRD
Manufacturer and Merchandiser of Quality Consumables and Equipment: CIGWELD
Address:
71 Gower St, Preston
Victoria 3072
Australia
Description of equipment: Welding Equipment (MMAW & GTAW). CIGWELD Transarc 141VRD, 161VRD and associated
accessories.
* Serial numbers are unique with each individual piece of equipment and details description, parts used to manufacture a
unit and date of manufacture.
* The equipment conforms to all applicable aspects and regulations of the ‘Low Voltage Directive’ (Directive 73/23/EU, as
recently changed in Directive93/63/EU and to the National legislation for the enforcement of the Directive.
National Standard and Technical Specifications
The product is designed to a number of standards and technical requirements among them are:
* IEC 60974-1 (BS 638-PT10)(EN 60 974-1) applicable to welding equipment and associated accessories.
* AS1966-1 applicable to welding equipment and associated accessories.
* AS/NZS 3652-(EMC Directive EN50199) applicable to arc welding equipment - generic emissions and regulations.
* UL (Underwriters Laboratory) rating 94VO flammability testing for all printed - circuit boards used.
* 92/31/EEC-EMC Directive EN50199 applicable to arc welding equipment - generic emissions and regulations.
* Extensive product design verification is conducted at the manufacturing facility as part of the routine design and
manufacturing process, to ensure the product is safe and performs as specified. Rigorous testing is incorporated into the
manufacturing process to ensure the manufactured product meets or exceeds all design specifications.
CIGWELD has been manufacturing and merchandising an extensive equipment range with superior performance, ultra
safe operation and world class quality for more than 30 years and will continue to achieve excellence.
2
Transarc 141VRD, 161VRD
CONTENTS
Page
1.
INTRODUCTION .............................................................................................................. 4
2.
ELECTROMAGNETIC COMPATIBILITY.................................................................. 6
3.
GENERAL INFORMATION............................................................................................ 8
4.
SAFE PRACTICES FOR THE USE OF WELDING EQUIPMENT ......................... 10
5.
RESUSCITATION FOR ELECTRIC SHOCK VICTIMS.......................................... 11
6.
SPECIFICATIONS .......................................................................................................... 13
7.
VOLTAGE REDUCTION DEVICE (VRD).................................................................. 15
8.
INSTALLATION RECOMMENDATIONS.................................................................. 16
9.
POWER SOURCE CONTROLS .................................................................................... 17
10.
SETUP FOR MMAW (Stick) and GTAW (TIG) ...................................................... 20
11.
SEQUENCE OF OPERATION................................................................................... 20
12.
BASIC TIG WELDING GUIDE ................................................................................. 22
13.
BASIC ARC WELDING GUIDE................................................................................ 23
14.
ROUTINE MAINTENANCE & INSPECTION........................................................ 25
15.
BASIC TROUBLESHOOTING .................................................................................. 26
TABLES
Table 1 – Filter lens size verses welding current/electrode size.............................................................11
Table 2 – 240V Mains Outlet & Fuse sizes to achieve maximum MMAW current ..............................17
Table 3 – Current ranges for varies tungsten electrode sizes .................................................................22
Table 4 – CIGWELD tungsten electrode types ......................................................................................22
Table 5 – Filler wire selection guide ......................................................................................................22
Table 6 – Shielding gas selection............................................................................................................23
Table 7 – TIG welding parameters for low carbon & low alloy steel pipe ............................................23
Table 8 – DC TIG welding parameters...................................................................................................23
Table 9 – Types of Electrodes ................................................................................................................25
FIGURES
Figure 1 – Six pin Remote Control socket ..............................................................................................20
Figure 2 – Transarc 141VRD and Transarc 161VRD Setup ..................................................................20
Figure 3 – Example of insufficient gap or incorrect sequence ...............................................................27
Figure 4 – Example of lack of fusion......................................................................................................28
Figure 5 – Examples of slag inclusion....................................................................................................28
3
Transarc 141VRD, 161VRD
1. INTRODUCTION
1.1 Notes, Cautions and Warnings
Throughout this manual, notes, cautions, and warnings are used to highlight important
information. These highlights are categorised as follows:
NOTE
An operation, procedure, or background information which requires additional emphasis or is helpful in
efficient operation of the system.
CAUTION
A procedure which, if not properly followed, may cause damage to the equipment.
WARNING
A procedure which, if not properly followed, may cause injury to the operator or others in the operating area.
1.2 Important Safety Precautions
WARNING 1
OPERATION AND MAINTENANCE OF WELDING ARC EQUIPMENT CAN BE DANGEROUS
AND HAZARDOUS TO YOUR HEALTH.
To prevent possible injury, read, understand and follow all warnings, safety precautions and instructions
before using the equipment. Call your local distributor if you have any questions.
GASES AND FUMES
Gases and fumes produced during the welding process can be dangerous and hazardous to your
health.
♦ Keep all fumes and gases from the breathing area. Keep your head out of the welding fume plume.
♦ Use an air-supplied respirator if ventilation is not adequate to remove all fumes and gases.
♦ The kinds of fumes and gases from the welding arc depend on the kind of metal being used, coatings on
the metal, and the different processes. You must be very careful when cutting or welding any metals
which may contain one or more of the following:
Antimony
Beryllium
Cobalt
Manganese
Selenium
Arsenic
Cadmium
Copper
Mercury
Silver
Barium
Chromium
Lead
Nickel
Vanadium
♦ Always read the Material Safety Data Sheets (MSDS’s) that should be supplied with the material you are
using. These MSDS’s will give you the information regarding the kind and amount of fumes and gases
that may be dangerous to your health.
♦ Use special equipment, such as water or down draft cutting tables, to capture fumes and gases.
♦ Do not use the welding torch in an area where combustible or explosive gases or materials are located.
♦ Phosgene, a toxic gas, is generated from the vapours of chlorinated solvents and cleansers. Remove all
sources of these vapours.
♦ Refer to the Victorian Occupational Health and safety (Confined Spaces) Regulations 1996 and Code of
Practice or its equivalent for other states and / or countries.
4
Transarc 141VRD, 161VRD
ELECTRIC SHOCK
Electric Shock can injure or kill. The welding arc process uses and produces high voltage
electrical energy. This electric energy can cause severe or fatal shock to the operator or others in
the workplace.
♦ Never touch any parts that are electrically “live” or “hot.”
♦ Wear dry gloves and clothing. Insulate yourself from the work piece or other parts of the welding
circuit.
♦ Repair or replace all worn or damaged parts.
♦ Extra care must be taken when the workplace is moist or damp.
♦ Install and maintain equipment according with local regulations.
♦ Disconnect power supply before performing any service or repairs.
♦ Read and follow all the instructions in the Operating Manual.
FIRE AND EXPLOSION
Fire and explosion can be caused by hot slag, sparks, or the welding arc.
♦ Be sure there is no combustible or flammable material in the workplace. Any material that cannot be
removed must be protected.
♦ Ventilate all flammable or explosive vapours from the workplace.
♦ Do not cut or weld on containers that may have held combustibles.
♦ Provide a fire watch when working in an area where fire hazards may exist.
♦ Hydrogen gas may be formed and trapped under aluminium workpieces when they are cut underwater or
while using a water table. DO NOT cut aluminium alloys underwater or on a water table unless the
hydrogen gas can be eliminated or dissipated. Trapped hydrogen gas that is ignited will cause an
explosion.
NOISE
Noise can cause permanent hearing loss. Plasma arc processes can cause noise levels to exceed
safe limits. You must protect your ears from loud noise to prevent permanent loss of hearing.
♦ To protect your hearing from loud noise, wear protective earplugs and/or earmuffs. Protect others in the
workplace.
♦ Noise levels should be measured to be sure the decibels (sound) do not exceed safe levels.
ARC RAYS
Arc Rays can injure your eyes and burn your skin. The welding arc process produces very bright
ultra violet and infra red light. These arc rays will damage your eyes and burn your skin if you are
not properly protected.
♦ To protect your eyes, always wear a welding face shield. Also always wear safety glasses with side
shields, goggles or other protective eye wear.
♦ Wear welding gloves and suitable clothing to protect your skin from the arc rays and sparks.
♦ Keep welding face shield and safety glasses in good condition. Replace lenses when cracked, chipped or
dirty.
♦ Protect others in the work area from the arc rays. Use protective booths, screens or shields.
♦ Use the shade of lens as recommended in this Operating Manual.
5
Transarc 141VRD, 161VRD
2. ELECTROMAGNETIC COMPATIBILITY
WARNING 2
Extra precautions for Electromagnetic Compatibility may be required when this Welding Power Source is
used in a domestic situation.
2.1 Installation and use - Users Responsibility
The user is responsible for installing and using the welding equipment according to the
manufacturer’s instructions. If electromagnetic disturbances are detected then it shall be the
responsibility of the user of the welding equipment to resolve the situation with the technical
assistance of the manufacturer. In some cases this remedial action may be as simple as earthing the
welding circuit, see NOTE 1. In other cases it could involve constructing an electromagnetic
screen enclosing the Welding Power Source and the work, complete with associated input filters.
In all cases, electromagnetic disturbances shall be reduced to the point where they are no longer
troublesome.
NOTE 1
The welding circuit may or may not be earthed for safety reasons. Changing the earthing arrangements
should only be authorised by a person who is competent to assess whether the changes will increase the risk of
injury, e.g. by allowing parallel welding current return paths which may damage the earth circuits of other
equipment. Further guidance is given in IEC 974-13 Arc Welding Equipment - Installation and use (under
preparation).
2.2 Assessment of Area
Before installing welding equipment, the user shall make an assessment of potential
electromagnetic problems in the surrounding area. The following shall be taken into account
i)
Other supply cables, control cables, signalling and telephone cables; above, below
and adjacent to the welding equipment.
ii) Radio and television transmitters and receivers.
iii)
iv)
v)
vi)
Computer and other control equipment.
Safety critical equipment, e.g. guarding of industrial equipment.
The health of people around, e.g. the use of pacemakers and hearing aids.
Equipment used for calibration and measurement.
vii) The time of day that welding or other activities are to be carried out.
viii) The immunity of other equipment in the environment: the user shall ensure that
other equipment being used in the environment is compatible: this may require
additional protection measures.
The size of the surrounding area to be considered will depend on the structure of the building and
other activities that are taking place. The surrounding area may extend beyond the boundaries of
the premises.
2.3 Methods of Reducing Electromagnetic Emissions
a)
Mains Supply
Welding equipment should be connected to the mains supply according to the manufacturer’s
recommendations. If interference occurs, it may be necessary to take additional precautions
such as filtering of the mains supply. Consideration should be given to shielding the supply
cable of permanently installed welding equipment in metallic conduit or equivalent.
6
Transarc 141VRD, 161VRD
Shielding should be electrically continuous throughout its length. The shielding should be
connected to the Welding Power Source so that good electrical contact is maintained between
the conduit and the Welding Power Source enclosure.
b)
Maintenance of Welding Equipment
The welding equipment should be routinely maintained according to the manufacturer’s
recommendations. All access and service doors and covers should be closed and properly
fastened when the welding equipment is in operation. The welding equipment should not be
modified in any way except for those changes and adjustments covered in the manufacturer’s
instructions. In particular, the spark gaps of arc striking and stabilising devices should be
adjusted and maintained according to the manufacturer’s recommendations.
c)
Welding Cables
The welding cables should be kept as short as possible and should be positioned close
together, running at or close to the floor level.
d)
Equipotential Bonding
Bonding of all metallic components in the welding installation and adjacent to it should be
considered. However, metallic components bonded to the work piece will increase the risk
that the operator could receive a shock by touching the metallic components and the electrode
at the same time. The operator should be insulated from all such bonded metallic components.
e)
Earthing of the Workpiece
Where the workpiece is not bonded to earth for electrical safety, nor connected to earth
because of it’s size and position, e.g. ship’s hull or building steelwork, a connection bonding
the workpiece to earth may reduce emissions in some, but not all instances. Care should be
taken to prevent the earthing of the workpiece increasing the risk of injury to users, or damage
to other electrical equipment. Where necessary, the connection of the workpiece to earth
should be made by direct connection to the workpiece, but in some countries where direct
connection is not permitted, the bonding should be achieved by suitable capacitance, selected
according to national regulations.
f)
Screening and Shielding
Selective screening and shielding of other cables and equipment in the surrounding area may
alleviate problems of interference. Screening the entire welding installation may be
considered for special applications.
7
Transarc 141VRD, 161VRD
3. GENERAL INFORMATION
3.1 Transarc 141VRD
The Transarc 141VRD is a 240 volt, single phase, constant current, 140 amps at 60% duty cycle,
DC stick -lift TIG power source. Combine this with features like built in Voltage Reduction
Device (VRD) in stick mode, robust construction, total digital control, lift TIG arc start, Pulse TIG,
built-in hot start, built-in arc control and you’ve got the ultimate unit designed for professional
MMAW (Stick welding) and GTAW (Lift TIG/Pulse Lift TIG) for DC weldable materials. All
these features are laid out on an easy to use digital display front panel with a single index control
knob and push button mode selection.
The VRD improves operator safety. This feature reduces the Open Circuit Voltage to below 20
volts when the welding power source is on while not in use.
3.2 Transarc 161VRD
The Transarc 161VRD is a 240 volt, single phase, constant current, 160 amps at 60% duty cycle,
DC stick -lift TIG power source. Combine this with features like built in Voltage Reduction
Device (VRD) in stick mode, robust construction, total digital control, lift TIG arc start, Pulse TIG,
built-in hot start, built-in arc control and you’ve got the ultimate unit designed for professional
MMAW (Stick welding) and GTAW (Lift TIG/Pulse Lift TIG) for DC weldable materials. All
these features are laid out on an easy to use digital display front panel with a single index control
knob and push button mode selection.
The VRD improves operator safety. This feature reduces the Open Circuit Voltage to below 20
volts when the welding power source is on while not in use.
3.3 User Responsibility
This equipment will perform as per the information contained herein when installed, operated,
maintained and repaired in accordance with the instructions provided. This equipment must be
checked periodically. Defective equipment (including welding leads) should not be used. Parts
that are broken, missing, plainly worn, distorted or contaminated, should be replaced immediately.
Should such repairs or replacements become necessary, it is recommended that appropriately
qualified persons approved by CIGWELD carry out such repairs. Advice in this regard can be
obtained by contacting accredited CIGWELD Distributor.
This equipment or any of its parts should not be altered from standard specification without prior
written approval of CIGWELD. The user of this equipment shall have the sole responsibility for
any malfunction which results from improper use or unauthorised modification from standard
specification, faulty maintenance, damage or improper repair by anyone other than appropriately
qualified persons approved by CIGWELD.
3.4 Duty Cycle
Duty Cycle is the amount of arc-on time (actual welding or cutting time) during any 10 minute
period that a machine can operate at it’s rated output without damaging internal components. For
example, the Transarc 161VRD is designed for 60% duty cycle at 160 amps. This means that it
has been designed and built to provide the rated amperage, 160 amps, for 6 minutes out of every
10 minute period (60% of 10 minutes is 6 minutes). During the other 4 minutes of the 10 minute
period the Transarc 161VRD must idle and be allowed to cool. The thermal cutout will operate if
the duty cycle is exceeded. As a general rule, a machine rated at 30% to 60% duty cycle would be
more than ample duty cycle for the majority of general-purpose non-automatic welding or cutting
applications.
8
Transarc 141VRD, 161VRD
Note that all duty cycles are calculated for a maximum ambient temperature of 40°C as per
AS1966. Duty cycles must be reduced, ie reduce the arc-on time, when the ambient temperature
exceeds 40°C.
3.5 Terms Of Warranty - June 2002
1. The Trade Practices Act 1974 (Commonwealth) and similar State Territory legislation relating to the supply of
goods and services, protects consumers' interests by ensuring that consumers are entitled in certain situations
to the benefit of various conditions, warranties, guarantees, rights and remedies (including warranties as to
merchantability and fitness for purpose) associated with the supply of goods and services. A consumer should
seek legal advice as to the nature and extent of these protected interests. In some circumstances, the supplier of
goods and services may legally stipulate that the said conditions, warranties, guarantees, rights and remedies
are limited or entirely excluded. The warranties set out in Clause 2 shall be additional to any non-excludable
warranties to which the Customer may be entitled pursuant to any statute.
2. Subject to Clause 3. CIGWELD gives the following warranties to the Customer:
Insofar as they are manufactured or imported by CIGWELD, goods will upon delivery be of merchantable
quality and reasonably fit for the purpose for which they are supplied by CIGWELD.
CIGWELD will repair or, at its option, replace those of the goods which, upon examination, are found by
CIGWELD to be defective in workmanship and/or materials.
CIGWELD reserves the right to request documented evidence of date of purchase.
3. The Warranty in Clause 2;
Is conditional upon:
The Customer notifying CIGWELD or our Accredited Distributor in writing of its claim within seven (7) days
of becoming aware of the basis thereof, and at its own expense returning the goods which are the subject of the
claim to CIGWELD or nominated Accredited Distributor/Accredited Service Agent.
The goods being used in accordance with the Manufacturer's Operating Manuals, and under competent
supervision.
Does not apply to:
Obsolete goods sold at auction, second-hand goods and prototype goods.
Breakdown or malfunction caused by accident, misuse or normal wear and tear.
Repairs or replacement made other than by CIGWELD or Accredited Service Agents, unless by prior
arrangement with CIGWELD.
Replacement parts or accessories which may affect product safety or performance and which are not
manufactured, distributed or approved by CIGWELD.
4. CIGWELD declares that, to the extent permitted by law, it hereby limits its liability in respect of the supply of
goods which are not of a kind ordinarily acquired for personal, domestic or household use or consumption to
any one or more of the following (the choice of which shall be at the option of CIGWELD).
The replacement of the goods or the supply of equivalent goods.
The repair of goods.
The payment of cost of replacing the goods or acquiring equivalent goods.
The payment of the cost of having goods repaired.
5. Except as provided in Clauses 2 to 4 above, to the extent permitted by statute, CIGWELD hereby excludes all
liability for any loss, damage, death or injury of any kind whatsoever occasioned to the Customer in respect of
the supply of goods including direct, indirect, consequential or incidental loss, damage or injury of any kind.
9
Transarc 141VRD, 161VRD
3.6 Warranty Schedule - June 2003
These warranty periods relate to the warranty conditions in clause 2. All warranty periods are from date of sale from
the Accredited Distributor of the equipment. Notwithstanding the foregoing, in no event shall the warranty period
extend more than the time stated plus one year from the date CIGWELD delivered the product to the Accredited
Distributor. Unless otherwise stated the warranty period includes parts and labour.
CIGWELD reserves the right to request documented evidence of date of purchase.
WARRANTY PERIOD
Transarc 141VRD, 161VRD
Main Power Magnetics .................................................................................................. 18 months
Original Main Power Rectifiers, Control P.C. Boards................................................... 18 months
All other circuits and components including, but not limited to, relays,
switches, contactors, solenoids, fans, power switch semi-conductors.............................. 1 year
Please note that the information detailed in this statement supersedes any prior published data produced by
CIGWELD.
WARNING 3
For the purpose of safety and performance and to protect your CIGWELD Equipment Warranty always use
genuine CIGWELD replacement parts and accessories.
4. SAFE PRACTICES FOR THE USE OF WELDING EQUIPMENT
In many situations the “striking” voltage can be hazardous. Any person touching simultaneously the electrode
lead/terminal and the work lead/terminal may receive a serious electrical shock. Additional precautions must be
exercised where two Welding Power Sources are being used close to each other because, under certain conditions,
the voltages between the welding terminals of the two Welding Power Sources could be two times the specified
open circuit voltage.
It is essential that the Welding Power Source be correctly installed, if necessary, by a qualified electrician and
maintained in sound mechanical and electrical condition. It is also important that the Welding Power Source be
switched off when not in use.
4.1 Precautions to be Taken by Operators
♦ Whenever practicable, all parts of the welding circuit should be isolated from earth and other conducting
material and under no circumstances should any earthing conductor of the electrical installation be used
in place of the work lead.
♦ The Mains supply voltage should be switched off before connecting or disconnecting welding leads.
Welding lead connections must have clean contact surfaces and must be securely tightened. Poor
connections will result in overheating and loss of welding current. All parts of the welding circuit,
including the return paths, are to be considered electrically alive, so the operator must ensure that no part
of the body is placed in such a position that it will provide a path for an electric current.
♦ Welding operators should avoid direct contact with the work to be welded or against any metal in contact
with the work. When this cannot be avoided the operator must not touch any exposed portion of the
electrode holder with any part of the body. Should this occur, the operator will risk completing the
electrical circuit through the body.
♦ When welding in confined spaces, where reasonable movement is restricted, particular care must be
taken to ensure that the area is well ventilated and the operator is under constant observation by a person
who can immediately switch off the power and give assistance in an emergency.
♦ The flux covering of an electrode cannot be assumed to provide effective insulation, consequently an
insulating glove must be worn when placing an electrode into its holder, or should it be necessary to
handle an electrode once it is in contact with its holder.
♦ During pauses between welding runs, electrode holders should be so placed that they cannot make
electrical contact with persons or conductive objects.
♦ The welding leads, both the electrode lead and the work lead, must be protected from damage. Damaged
leads must not be used.
♦ Keep combustible materials away from the welding area. Have a suitable fire extinguisher handy.
10
Transarc 141VRD, 161VRD
♦ Do not stand on damp ground when welding.
4.2 Personal Protection
The radiation from an electric arc during the welding process can seriously harm eyes and skin. It
is essential that the following precautions be taken:
♦ Gloves should be flameproof gauntlet type to protect hands and wrists from heat burns and harmful
radiations. They should be kept dry and in good repair.
♦ Protective clothing must protect the operator from burns, spatter and harmful radiation. Woollen
clothing is preferable to cotton because of its greater flame resistance. Clothing should be free from oil
or grease. Wear leggings and spats to protect the lower portion of the legs and to prevent slag and
molten metal from falling into boots or shoes.
♦ Face Shield
It is recommended to use a welding face shield, conforming to the relevant standards, when electric arc
welding. Use a welding face shield in serviceable condition and fitted with an eye filter lens to safely
reduce harmful radiation from the arc as per Table 1.
Welding current range
Electrode Diameter
Suggested Filter Lens
40 to 70 amps
2.0mm
Shade 8
55 to 90 amps
2.5mm
Shade 8
90 to 135 amps
3.2mm
Shade 10
135 to 200 amps
4.0mm
Shade 10
Table 1 – Filter lens size verses welding current/electrode size
Protective filter lenses are provided to reduce the intensity of radiation entering the eye thus filtering out
harmful infra-red, ultra-violet radiation and a percentage of the visible light. Such filter lenses are
incorporated within face shields. To prevent damage to the filter lenses from molten or hard particles an
additional hard clear glass or special clear external cover lens is provided. This cover lens should always
be kept in place and replaced before the damage impairs your vision while welding.
5. RESUSCITATION FOR ELECTRIC SHOCK VICTIMS
Electric shock may kill immediately. Early resuscitation is required if a life is to be saved. Every Second Counts!
Electrical currents may:
♦ Stop the heart;
♦ Cause contraction of the muscles of the body;
♦ Paralyse breathing due to paralysis of the centre of respiration in the brain;
♦ Cause burns.
The victims often cannot free themselves from the current and may not be able to breathe due to fixation of the
chest.
11
Transarc 141VRD, 161VRD
5.1 Resuscitation
Efficient resuscitation requires training which is available from the St John’s Ambulance Association, Red
Cross and other sources.
1 Don’t become a victim. Switch off power if
possible. If not, remove victim from contact,
using some insulating material.
2 If unconscious, place victim on their side and
clear vomit and other foreign matter from mouth.
Check for breathing by look, listen and feel. If
not breathing, commence expired air
resuscitation (E.A.R.). This should take no
longer than 3 or 4 seconds.
3 Place victim flat on their back on a hard surface,
open airway - using head tilt and jaw support as
shown.
4 Begin artificial breathing - 5 full breaths in 10
seconds, sealing nostrils with cheek or holding
nose closed.
5 Check carotid pulse in neck. If pulse is present,
continue E.A.R.
15 breaths per minute for adults.
20 breaths per minute for children.
6 If pulse is absent and you have been trained,
begin cardio pulmonary resuscitation (C.P.R).
Cardiac Compression - depress lower end of
breast bone (sternum) 4cm to 5cm, less for small
children.
One rescuer - 2 breaths, 15 compressions in 15
seconds, i.e. 4 cycles per minute.
Two rescuers - 1 breath, 5 compressions in 5
seconds, i.e. 12 cycles per minute.
7 Check for return of pulse and breathing after 1
minute and at least every 2 minutes. Continue
uninterrupted until trained assistance is available.
When breathing and pulse return, turn on side
and continue observation.
12
Transarc 141VRD, 161VRD
6. SPECIFICATIONS
Description (Refer NOTE 2)
Transarc 141VRD
Transarc 161VRD
Power Source Part Number
625775
625799
Plant Part Number
625779
625802
Fan Cooled
Fan Cooled
Heavy Duty Inverter;
MMAW & Lift Arc TIG
Heavy Duty Inverter;
MMAW & Lift Arc TIG
8.0kg
8.5kg
Cooling
Welder Type & Welding process
Welding Power Source Weight
Dimensions
H230mm x W185mm x D310mm H230mm x W185mm x D310mm
Manufactured to International Standard
IEC 60974-1
IEC 60974-1
Number of Phases
Single phase
Single phase
Nominal Supply Voltage
240V ±10%
240V ±10%
Nominal Supply Frequency
50/60Hz
50/60Hz
Maximum 240V extention cable length
Minimum cable rating for extention cable
20 Metres
20 Amp
20 Metres
20 Amp
120A @ 18% Duty Cycle
140A @ 35% Duty Cycle
16 Amp Wire Fuse
10 Amp Power Point
2.4kVA
120A @ 42% Duty Cycle
160A @ 50% Duty Cycle
16 Amp Wire Fuse
15 Amp Power Point
3.6kVA
55A @ 100% (MMAW)
83A @ 100% (GTAW)
10 Amp plug & 15 Amp lead
85A @ 100%(MMAW)
113A @ 100% (GTAW)
15 Amp plug & lead
3 Core, 2.5mm2
140A @ 60% Duty Cycle
140A @ 70% Duty Cycle
20 Amp Wire Fuse
20 Amp Power Point
6.7kVA
3 Core, 4.0mm2
160A @ 60% Duty Cycle
160A @ 70% Duty Cycle
25 Amp Wire Fuse
25 Amp Power Point
7.9kVA
110A @ 100%
125A @ 100%
Effective Input Current for MMAW Welding Current
@ 100% Duty Cycle
21A
25A
Max Input Current for Max Welding Current
28A
33A
2A due to
Anti Stick Circuit
2A due to
Anti Stick Circuit
♣ 8kVA
♣ 8kVA
Self Resetting
Thermostat
Self Resetting
Thermostat
MMAW Weld Current for Fitted Primary Lead (15A):
GTAW Weld Current for Fitted Primary Lead (15A):
Recommended Wire Fuse Size
Recommended Power Point
Maximum kVA at Rated MMAW Weld Current
Welding Current Rated Duty Cycle for
Fitted Primary Lead
Recommended Primary Lead
Maximum MMAW Weld Current
Maximum GTAW Weld Current
Recommended Wire Fuse Size
Recommended Power Point
Maximum kVA at Rated Weld Current
Welding Current @ 100% Duty Cycle
Maximum Input Current for Short Circuit
Single Phase Generator Requirement
Thermal Protection
Welding Current Range
5 – 140A
5 – 160A
Nominal DC Open Circuit Voltage (VRD On)
11V
11V
Nominal DC Open Circuit Voltage (VRD Off)
82V
82V
♣ The Generators stated kVA ratings MUST be adhered to minimise the welding Power Source’s possible failure as a result
of inadequate 240V power at the welder’s MAXIMUM welding current and MAXIMUM duty cycle. Warranty will be
void if the welding Power Source fails as a result of being operated on inadequate 240V power.
NOTE 2
Due to variations that can occur in manufactured products, claimed performance, voltages, ratings, all capacities,
measurements, dimensions and weights quoted are approximate only. Achievable capacities and ratings in use and
operation will depend upon correct installation, use, applications, maintenance and service.
13
Transarc 141VRD, 161VRD
6.1 Controls, Features and Functions
Front Panel Controls
(Refer NOTE 2)
POWER indicator (AC)
Over Temperature indicator
Weld Current Preview
Actual Welding Current when
welding
WELD MODE selector
WELDING Current Control
Automatic Hot Start Feature
This feature improves the start
characteristics for stick electrodes
e.g. low hydrogen electrodes.
Automatic Anti-Stick Feature
This feature enables the operator
to very easily remove an electrode that has become welded to
the work piece.
Automatic Arc Force Feature
This feature is used to the help
the electrode punch through pipe
wall and weld pipe joint inside as
well as the outside.
Output Terminals
6 Pin Remote Control Socket
Transarc 141VRD
Transarc 161VRD
Digital Meter on
Second Line of Digital Display
reads “OVERLOAD”
First Line of Digital Display reads
“Preview” and is adjusted by the
WELD CURRENT control knob.
First Line of Digital Display reads
“Welding” and the average weld
current. The accuracy of the
ammeter is Weld Current ±5%
MMAW without Arc Force;
MMAW with Arc Force;
Lift TIG; Pulse Lift TIG @ 3Hz;
Pulse Lift TIG @ 175Hz
Front Panel Control Knob
Internally set as a variable
percentage of weld current for
optimum operation
Digital Meter on
Second Line of Digital Display
reads “OVERLOAD”
First Line of Digital Display reads
“Preview” and is adjusted by the
WELD CURRENT control knob.
First Line of Digital Display reads
“Welding” and the average weld
current. The accuracy of the
ammeter is Weld Current ±5%
MMAW without Arc Force;
MMAW with Arc Force;
Lift TIG; Pulse Lift TIG @ 3Hz;
Pulse Lift TIG @ 175Hz
Front Panel Control Knob
Internally set as a variable
percentage of weld current for
optimum operation
Weld current folds back to
approximately 8 amps if the arc
voltage is less than 5V for more
than 3 seconds.
Weld current folds back to
approximately 8 amps if the arc
voltage is less than 5V for more
than 3 seconds.
Internally set to 130% of the
welding current value if the arc
voltage is less than 10V.
Internally set to 130% of the
welding current value if the arc
voltage is less than 10V.
Twist lock DINSE style socket
Used to remotely control Weld
current via optional remote control
accessories
Twist lock DINSE style socket
Used to remotely control Weld
current via optional remote control
accessories
6.2 Plant Contents
Description
Transarc
141VRD
Power Source
Transarc
141VRD
Plant
Transarc
161VRD
Power Source
Transarc
161VRD
Plant
Welding Power Source
Electrode lead
Work lead
Two 25mm2 Dinse
Connectors
Operating Manual
Product Bag
Six pin plug
9
8
8
9
9
9
9
9
9
8
8
9
9
9
9
9
9
8
9
9
9
9
9
8
9
9
9
9
14
Transarc 141VRD, 161VRD
6.3 Accessories
Part
Number
Description
646323
Manual Arc Lead Set
700708
Remote Hand Control
700709
Remote Foot Control
453833
Hiderok Helmet
646363
Wire Brush, 4 rows
BGSAK2
TIG Torch Accessory Kit
304710402
190A TIG Torch SA17VD1
700433
Gas Hose Kit for TIG Torch
301526
Flowmeter/Regulator
700638
Work Lead 3M
Transarc 141VRD
Transarc 161VRD
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
9
7. VOLTAGE REDUCTION DEVICE (VRD)
WARNING
WELDING IN HAZARDOUS ENVIRONMENTS
Before welding in hazardous environments the VOLTAGE REDUCTION DEVICE (VRD) MUST BE TURNED ON.
For example confined spaces, wet areas and hot humid conditions are classed as hazardous environments.
WARNING TO EMPLOYERS
Workplace safety legislation imposes substantial duties on employers to provide a safe workplace and equipment for its
employees.
If an employer fails to do so criminal prosecution of the company and its senior officers and employees may result with
substantial penalties including fines and in certain cases jail sentences.
It is therefore essential employers acquire safe equipment and ensure its employees are properly trained in its use.
7.1 VRD Specification
With the VRD TURN ON, this equipment meets the following specifications
Transarc
Description
141VRD, 161VRD
Notes
VRD Open Circuit Voltage
9.6 to 11.8V
Open circuit voltage between welding
terminals
VRD Resistance
148 to 193 ohms The required resistance between welding
terminals to turn ON the welding power
VRD Turn OFF Time
0.2 to 0.3 seconds The time taken to turn OFF the welding
power once the welding current has
stopped
7.2 VRD Maintenance
Routine inspection and testing (power source)
An inspection of the power source, an insulation resistance test and an earthing resistance test shall
be carried out in accordance with clause 4.1 of AS 1647.2
a) For transportable equipment, at least once every 3 months; and
15
Transarc 141VRD, 161VRD
b) For fixed equipment, at least once every 12 months.
The owners of the equipment shall keep a suitable record of the periodic tests.
Note 3
A transportable power source is any equipment that is not permanently connected and fixed in the position in
which it is operated.
In addition to the above tests and specifically in relation to the VRD fitted to this machine, the
following periodic tests should also be conducted by an accredited CIGWELD service agent.
Description
AS3195 & IEC 60974-1 Requirements
VRD Open Circuit Voltage
VRD Turn ON Resistance
VRD Turn OFF Time
Less than 20V; at Vin=240V
Less than 200 ohms
Less than 0.3 seconds
If this equipment is used in a hazardous location or environments with a high risk of electrocution
then the above tests should be carried out prior to entering this location.
8. INSTALLATION RECOMMENDATIONS
8.1 Environment
The Transarc 141VRD, 161VRD are designed for use in hazardous environments when the VRD
is TURNED ON.
a)
Examples of environments with increased hazard of electric shock are i)
ii)
iii)
b)
In locations in which freedom of movement is restricted, so that the operator is
forced to perform the work in a cramped (kneeling, sitting or lying) position with
physical contact with conductive parts;
In locations which are fully or partially limited by conductive elements, and in
which there is a high risk of unavoidable or accidental contact by the operator, or
In wet or damp hot locations where humidity or perspiration considerable reduces
the skin resistance of the human body and the insulation properties of accessories.
Environments with increased hazard of electric shock do not include places where
electrically conductive parts in the near vicinity of the operator, which can cause increased
hazard, have been insulated.
8.2 Location
Be sure to locate the welder according to the following guidelines:
a)
b)
c)
d)
e)
f)
In areas, free from moisture and dust.
Ambient temperature between 0°C to 40°C.
In areas, free from oil, steam and corrosive gases.
In areas, not subjected to abnormal vibration or shock.
In areas, not exposed to direct sunlight or rain.
Place at a distance of 300mm or more from walls or similar that could restrict natural
airflow for cooling.
8.3 Ventilation
Since the inhalation of welding fumes can be harmful, ensure that the welding area is effectively
ventilated.
16
Transarc 141VRD, 161VRD
8.4 Mains Supply Voltage Requirements
The Mains supply voltage should be within ± 10% of the rated Mains supply voltage. Too low a
voltage may cause the fuse or circuit breaker to rupture due to the increased primary current. Too
high a supply voltage will cause the Power Source components to fail.
8.5 Minimum 240V Mains Current Circuit Requirements
CAUTION 1
CIGWELD recommends that the maximum 240V extention cable length used with this equipment is 20
metres. Refer to the Specification on page 13.
The Welding Power Source must be:
♦ Correctly installed, if necessary, by a qualified electrician.
♦ Correctly earthed (electrically) in accordance with local regulations.
♦ Connected to the correct size 240V Mains Current Circuit as per the SPECIFICATIONS on
page 13.
WARNING 4
CIGWELD advises that this equipment be electrically connected by a qualified electrical trades-person.
The following 240V Mains Current Circuit recommendations are required to obtain the maximum
welding current and duty cycle from your equipment:
Model
Mains Supply
Lead Size
Recommended
240V Mains
Outlet
Recommended
240V Mains Fuse
MMAW Current &
Duty Cycle
Transarc 141VRD
2.5 mm2
20 Amp Outlet
20 Amp wire fuse
140A @ 60%
Transarc 161VRD
2
25 Amp Outlet
25 Amp wire fuse
160A @ 60%
4.0 mm
Table 2 – 240V Mains Outlet & Fuse sizes to achieve maximum MMAW current
9. POWER SOURCE CONTROLS
9.1 Transarc 141VRD and Transarc
161VRD Controls
Two Line
Digital
Display
C
eld
Proce
Weld
Mode
Switch
6 Pin Remote
Control Soc ket
ss
W
D
SWITCH OFF Before
Disconnecting
Primary Lead
Positive
Terminal
WARNING 5
OFF
Refer to Manual
for correct use
ENT
Welding
Current
Control
VRD
ON
R
UR
ON/OFF Switch and Power ON Indicator
This switch connects the 240V power to
the inverter when in the ON position. This
enables the user to commence welding. It
illuminates when the welder is connected
to 240V and the ON/OFF Switch is ON.
WE
L
a)
VRD ON/OFF
Indication
Lights
ON/OFF Switch
and Power On
Indicator
Negative
Terminal
Switch the ON/OFF switch to the OFF position
before disconnecting the primary supply lead from the power point.
When the welder is connected to the Mains supply voltage, the internal electrical components maybe at 240V
potential.
17
Transarc 141VRD, 161VRD
b)
Two Line Digital Display
Preview Weld Current
Preview Weld Current is displayed on the first top line of the display when the operator is not
welding. The welding current is increased by turning the WELD CURRENT Control knob
clockwise or decreased by turning it anti-clockwise.
Weld Current when Welding
Weld Current is displayed on the first top line of the display when the operator is welding and
for 5 seconds after the arc has extinguished.
Thermal Overload Indication
The word “OVERLOAD” is displayed on the second line of the display and weld current
ceases if the internal parts exceed their safe operating temperature.
Over Primary Voltage
The words “INPUT ERROR (V)” are displayed on the second line of the display and weld
current ceases if the primary voltage exceeds 264Vac when the electrode comes into contact
with the work piece.
Weld Modes
The following weld modes can be selected by pressing Weld Process button:
Weld Mode
STICK
STICK + Arc
Force
Lift TIG
Second Line
Digital Display
“Stick”
“Stick+ArcForce”
“Lift-TIG”
Pulse Lift TIG
at 3Hz
Pulse Lift TIG
at 175Hz
“Lift Pulse
3Hz”
“Lift Pulse
175Hz”
Comments
MMAW (Stick) with built-in Hot Start enabled.
MMAW (Stick) with built-in Hot Start & Arc Force
enabled.
Lift GTAW (TIG); Hot Start disabled.
A torch switch must be used to establish a lift TIG arc.
Pulse Lift GTAW @ 3Hz; Hot Start disabled.
A torch switch must be used to establish a lift TIG arc.
Pulse Lift GTAW @ 175Hz; Hot Start disabled.
A torch switch must be used to establish a lift TIG arc.
c)
WELD CURRENT Control
The welding current is increased by turning the Current Control clockwise or decreased by
turning the Current Control anti-clockwise.
d)
Positive and Negative Terminals
Welding current flows from the Power Source via heavy duty bayonet type terminals. It is
essential, however, that the male plug is inserted and turned securely to achieve a sound
electrical connection.
CAUTION 2
Loose welding terminal connections can cause overheating and result in the male plug being fused in the
bayonet terminal.
e)
Weld Mode Switch
The Weld Mode switch selects the mode of operation as follows:
i)
STICK
The Power Source is set for manual arc welding, the Hot Start feature is enabled,
the Anti-Stick feature is enabled and the Arc Force feature is disabled.
18
Transarc 141VRD, 161VRD
ii)
iii)
iv)
v)
STICK + Arc-Force
The Power Source is set for manual arc welding, the Hot Start feature is enabled,
the Anti-Stick feature is enabled and the Arc Force feature is enabled.
Lift TIG
The Power Source is set for TIG welding with lift arc start initiation; the Hot Start
feature is disabled. Pressing the torch switch AND touching the tungsten on the
work piece produces a very low starting current. Moving the tungsten steadily
away from the work piece (with the torch switch still pressed) causes the output to
ramp up to the WELD CURRENT control setting. Releasing the torch switch will
extinguish the arc.
Lift Pulse at 3Hz
The Power Source is set for pulse TIG welding with lift arc start initiation at 3Hz,
the Hot Start feature is disabled. Pressing the torch switch AND touching the
tungsten on the work piece produces a very low starting current. Moving the
tungsten steadily away from the work piece (with the torch switch still pressed)
causes the output to ramp up to the WELD CURRENT control setting. Releasing
the torch switch will extinguish the arc.
Lift Pulse at 175Hz
The Power Source is set for pulse TIG welding with lift arc start initiation at 175Hz,
the Hot Start feature is disabled. Pressing the torch switch AND touching the
tungsten on the work piece produces a very low starting current. Moving the
tungsten steadily away from the work piece (with the torch switch still pressed)
causes the output to ramp up to the WELD CURRENT control setting. Releasing
the torch switch will extinguish the arc.
f)
VRD ON/OFF Indicator Lights
These lights only operate in the MMAW (Stick) modes. In all the TIG modes both lights are
turned off.
The green VRD ON light illuminates (red light is OFF) when the OCV is less than 20 volts
and no welding current is flowing.
The red VRD OFF light illuminates (green light is OFF) when the OCV is greater than 20
volts or welding current is flowing.
g)
6 Pin Remote Control Socket
The 6 pin Remote Control Socket is used to connect remote current control devices to the
welding Power Source circuitry. To make connections, align keyway, insert plug, and rotate
threaded collar fully clockwise. The socket information is included in the event the supplied
cable is not suitable and it is necessary to wire a plug or cable to interface with the socket.
19
Transarc 141VRD, 161VRD
Socket
Pin
1
2
3
4
5
6
Function
Input (5V) to energise weld current.
(connect pins 1 & 2 to turn on welding current)
Zero ohm (minimum) connection to 10k ohm
remote control potentiometer and zero volt rail
(connect pins 1 & 2 to turn on welding current)
Wiper arm connection to 10k ohm remote
control potentiometer
10k ohm (maximum) connection to 10k ohm
remote control potentiometer
Not Used.
Not Used.
Figure 1 – Six pin Remote Control socket
10. SETUP FOR MMAW (Stick) and GTAW (TIG)
Conventional operating procedures apply when using the Welding Power Source, i.e. connect work lead
directly to workpiece and electrode lead is used to hold electrode. Wide safety margins provided by the
coil design ensure that the Welding Power Source will withstand short term overload without adverse
effects. The welding current range values should be used as a guide only. Current delivered to the arc is
dependent on the welding arc voltage, and as
welding arc voltage varies between different
classes of electrode, welding current at any one
setting would vary according to the type of
electrode in use. The operator should use the
welding current range values as a guide, then
finally adjust the current setting to suit the
application.
VRD
ON
OFF
Proce
s
eld
s
W
CU
ENT
RR
WE
L
Refer to Manual
for correct use
D
SWITCH OFF Before
Disconnecting
Primary Lead
WARNING 6
Before connecting the work clamp to the work
and inserting the electrode in the electrode
holder make sure the Mains power supply is
switched off.
CAUTION 3
Remove any packaging material prior to use.
Do not block the air vents at the front or rear
of the Welding Power Source.
Figure 2 – Transarc 141VRD and Transarc 161VRD Setup
11. SEQUENCE OF OPERATION
11.1 TIG Welding for Transarc 141VRD & Transarc 161VRD
1. Switch the ON/OFF Switch to OFF.
2. Connect the earth clamp to the positive terminal, torch cable to the negative; torch trigger
switch cable and gas hose as shown in Figure 2.
Ensure that the TIG torch is connected to the negative terminal.
3. Plug the Power Source in and switch the power point ON.
20
Transarc 141VRD, 161VRD
4. Switch the ON/OFF Switch to the ON position.
5. Turn the gas regulator ON.
6. Set the Weld Mode process selection switch to Lift TIG or Lift TIG at 3Hz or Lift TIG at
175Hz.
7. Set the Weld Current (A) control to the desired welding current.
8. Commence welding by pressing the torch switch AND touching the tungsten on the work
piece to produce a very low starting current. Moving the tungsten steadily away from the
work piece (with the torch switch still pressed) causes the output to ramp up to the WELD
CURRENT setting. Releasing the torch switch will extinguish the arc.
9. If necessary, readjust the Weld Current (A) control to obtain the welding condition required.
10. After completion of welding the Power Source should be left turned ON for 2 to 3 minutes.
This allows the fan to run and cool the internal components.
11. Switch the ON/OFF Switch to the OFF position for 2 to 3 minutes after weld is completed.
WARNING 7
Switch the ON/OFF switch to the OFF position before disconnecting the primary supply lead from the power
point.
11.2 Stick Welding
1. Switch the ON/OFF Switch to OFF.
2. Connect the earth clamp lead to the negative terminal and electrode holder lead to the positive
terminal.
Consult the electrode manufactures packaging for the correct electrode polarity.
3. Plug the Power Source in and switch the power point ON.
4. Switch the ON/OFF Switch to the ON position. This will immediately energise the power
supply up to the output terminals and the electrode holder to the VRD voltage.
5. Set the Weld Mode process selection switch to Stick. or Stick and Arc Force.
6. Set the Weld Current (A) control to the desired welding current.
7. Commence welding. If necessary, readjust the Weld Current (A) control to obtain the
welding condition required.
8. After completion of welding the Power Source should be left turned ON for 2 to 3 minutes.
This allows the fan to run and cool the internal components.
9. Switch the ON/OFF Switch to the OFF position for 2 to 3 minutes after weld is completed.
WARNING 8
Switch the ON/OFF switch to the OFF position before disconnecting the primary supply lead from the power
point.
21
Transarc 141VRD, 161VRD
12. BASIC TIG WELDING GUIDE
12.1 Electrode Polarity
Connect the TIG torch to the ‘-’ terminal and the work lead to the ‘+’ terminal for direct current
straight polarity. Direct current straight polarity is the most widely used polarity for DC TIG
welding. It allows limited wear of the electrode since 70% of the heat is concentrated at the work
piece.
12.2 Tungsten Electrode Current Ranges
Electrode Diameter (mm)
DC Current (Amps)
1.0
30 – 60
1.6
60 – 115
2.4
100 – 165
3.2
135 – 200
4.0
190 – 280
4.8
250 – 340
Table 3 – Current ranges for varies tungsten electrode sizes
12.3 CIGWELD Tungsten Electrode Types
Electrode Type
(Ground Finish)
Thoriated 2%
Zirconated 1%
Ceriated 2%
Welding Application
Features
Colour
Code
DC welding of mild steel,
stainless steel and copper.
Excellent arc starting, Long life, High
current carrying capacity.
High quality AC welding of
aluminium, magnesium and
their alloys.
Self cleaning, Long life, Maintains
balled end, High current carrying
capacity.
White
AC & DC welding of mild
steel, stainless steel, copper,
aluminium, magnesium and
their alloys
Longer life, More stable arc, Easier
starting, Wider current range,
Narrower more concentrated arc.
Grey
Red
Table 4 – CIGWELD tungsten electrode types
NOTE 4
These are DC welders and can not be used for AC welding application.
12.4 Guide for Selecting Filler Wire Diameter
Welding Current (A)
Filler Wire Diameter (mm). Refer to NOTE 5.
10-20
20-50
50 – 100
100 – 200
1.2
1.2 - 1.6
1.6 - 2.4
1.6 - 3.2
Table 5 – Filler wire selection guide
NOTE 5
The filler wire diameter specified in Table 5 is a guide only, other diameter wires may be used according to the
welding application.
22
Transarc 141VRD, 161VRD
12.5 Shielding Gas Selection
Alloy
Shielding Gas
Argoshield is a registered trademark of BOC Gases Limited.
Aluminium & alloys
Carbon Steel
Stainless Steel
Nickel Alloy
Copper
Titanium
Welding Argon, Argoshield 80T, 81T
Welding Argon
Welding Argon, Argoshield 71T, 80T, 81T
Welding Argon, Argoshield 71T
Welding Argon, Argoshield 81T
Welding Argon, Argoshield 80T, 81T
Table 6 – Shielding gas selection
12.6 TIG Welding Parameters for Low Carbon & Low Alloy Steel Pipe
Electrode Type &
Diameter
Current Range DC
Amperes
Filler Rod for
Root Pass
Thoriated 2%
2.4 mm
120 - 170
Yes
Thoriated 2%
2.4 mm
100 - 160
Yes
Thoriated 2%
2.4 mm
90 - 130
No
Joint Preparation
Table 7 – TIG welding parameters for low carbon & low alloy steel pipe
12.7 Welding Parameters for Steel
Filler Rod Argon Gas
Dia
Flow Rate Joint Type
(if required) Litres/min
Base Metal
Thickness
DC Current
for Mild
Steel
DC Current
for Stainless
Steel
Tungsten
Electrode
Diameter
1.0mm
35-45
40-50
45-55
50-60
60-70
70-90
80-100
90-115
115-135
140-165
160-175
170-200
20-30
25-35
30-45
35-50
40-60
50-70
65-85
90-110
100-125
125-150
135-160
160-180
1.0mm
1.6mm
5-7
1.0mm
1.6mm
5-7
1.6mm
1.6mm
7
1.6mm
2.4mm
7
2.4mm
3.2mm
10
3.2mm
4.0mm
10
1.2mm
1.6mm
3.2mm
4.8mm
6.4mm
Butt/Corner
Lap/ Fillet
Butt/Corner
Lap/ Fillet
Butt/Corner
Lap/ Fillet
Butt/Corner
Lap/ Fillet
Butt/Corner
Lap/ Fillet
Butt/Corner
Lap/ Fillet
Table 8 – DC TIG welding parameters
13. BASIC ARC WELDING GUIDE
13.1 Electrode Polarity
Stick electrodes are generally connected to the ‘+’ terminal and the work lead to the ‘−’ terminal
but if in doubt consult the electrode manufacturers literature.
23
Transarc 141VRD, 161VRD
13.2 Effects of Stick Welding Various Materials
a)
High tensile and alloy steels
The two most prominent effects of welding these steels are the formation of a hardened zone
in the weld area, and, if suitable precautions are not taken, the occurrence in this zone of
under-bead cracks. Hardened zone and under-bead cracks in the weld area may be reduced
by using the correct electrodes, preheating, using higher current settings, using larger
electrodes sizes, short runs for larger electrode deposits or tempering in a furnace.
b)
Manganese steels
The effect on manganese steel of slow cooling from high temperatures is to embrittle it. For
this reason it is absolutely essential to keep manganese steel cool during welding by
quenching after each weld or skip welding to distribute the heat.
c)
Cast Iron
Most types of cast iron, except white iron, are weldable. White iron, because of its extreme
brittleness, generally cracks when attempts are made to weld it. Trouble may also be
experienced when welding white-heart malleable, due to the porosity caused by gas held in
this type of iron.
d)
Copper and alloys
The most important factor is the high rate of heat conductivity of copper, making preheating
of heavy sections necessary to give proper fusion of weld and base metal.
13.3 Types of Electrodes
Arc Welding electrodes are classified into a number of groups depending on their applications.
There are a great number of electrodes used for specialised industrial purposes which are not of
particular interest for everyday general work. These include some low hydrogen types for high
tensile steel, cellulose types for welding large diameter pipes, etc.
The range of electrodes dealt with in this publication will cover the vast majority of applications
likely to be encountered; are all easy to use and all will work on even the most basic of welding
machines.
Metals being
joined
Electrode Size
& Part No.
CIGWELD
Electrode
Comments
Mild steel
2.5mm 611182
3.2mm 611183
4.0mm 611184
Satincraft 13
(AS/NZS E4113-0)
Ideal electrodes for all general
purpose work. Features include out
standing operator appeal, easy arc
starting and low spatter.
Mild steel
2.5mm 611242
3.2mm 611243
4.0mm 611244
Ferrocraft 21
(AS/NZS E4818-2)
All positional electrode for use on
mild and galvanised steel furniture,
plates, fences, gates, pipes and tanks
etc. Especially suitable for verticaldown welding.
Cast iron
3.2mm 611733
4.0mm 611734
Castcraft100
Suitable for joining all cast irons
except white cast iron.
Stainless steel
2.5mm 611652
3.2mm 611653
Satincrome 318L-17
(AS/NZS E316L-17)
High corrosion resistance. Ideal for
dairy work, etc. On stainless steels.
Copper, Bronze,
Brass, etc.
3.2mm 611783
Bronzecraft
(AS/NZS E6200-A2)
Easy to use electrode for marine
fittings, water taps and valves, water
trough float arms, etc. Also for
joining copper to steel and for bronze
overlays on steel shafts.
24
Transarc 141VRD, 161VRD
Metals being
joined
High Alloy Steels,
Dissimilar Metals,
Crack Resistance.
All Hard-To-Weld
Jobs.
Electrode Size
& Part No.
2.5mm 611702
3.2mm 611703
4.0mm 611704
CIGWELD
Electrode
Weldall
(AS/NZS E312-17)
Comments
Weldall does truly what its name
states. It will weld even the most
problematical jobs such as springs,
shafts, broken joins mild steel to
stainless and alloy steels.
Not suitable for Aluminium.
Table 9 – Types of Electrodes
For HARDFACING of Steels, CIGWELD TOOLCRAFT is an electrode that produces an extremely hard
weld deposit. It is ideal for building up axes, wedges, slasher blades, worn cams, rock drills, earth moving
and digging equipment, etc.
14. ROUTINE MAINTENANCE & INSPECTION
WARNING 9
There are extremely dangerous voltages and power levels present inside this product. Do not attempt to open or
repair unless you are an Accredited CIGWELD Service Agent. Disconnect the Welding Power Source from the
Mains Supply Voltage before disassembling.
An inspection of the power source, an insulation resistance test and an earthing resistance test shall be
carried out in accordance with clause 4.1 of AS 1647.2
a) For transportable equipment, at least once every 3 months; and
b) For fixed equipment, at least once every 12 months.
The owners of the equipment shall keep a suitable record of the periodic tests.
Note 6
A transportable power source is any equipment that is not permanently connected and fixed in the position in which
it is operated.
In addition to the above tests and specifically in relation to the VRD fitted to this machine, the following
periodic tests should also be conducted by an accredited CIGWELD service agent.
Description
AS3195 & IEC 60974-1 Requirements
VRD Open Circuit Voltage
VRD Turn ON Resistance
VRD Turn OFF Time
Less than 20V; at Vin=240V
Less than 200 ohms
Less than 0.3 seconds
If this equipment is used in a hazardous location or environments with a high risk of electrocution then
the above tests should be carried out prior to entering this location.
Welding equipment should be regularly checked by a qualified electrical tradesperson to ensure that:
• The main earth wire of the electrical installation is intact.
• Power point for the Welding Power Source is effectively earthed and of adequate current rating.
• Plugs and cord extension sockets are correctly wired.
• Flexible cord is of the 3-core tough rubber or plastic sheathed type of adequate rating, correctly
connected and in good condition.
• Welding terminals are shrouded to prevent inadvertent contact or short circuit.
• The frame of the Welding Power Source is effectively earthed.
• Welding leads and electrode holder are in good condition.
25
Transarc 141VRD, 161VRD
• The Welding Power Source is clean internally, especially from metal filing, slag, and loose material.
If any parts are damaged for any reason, replacement is recommended.
15. BASIC TROUBLESHOOTING
WARNING 10
There are extremely dangerous voltages and power levels present inside this product. Do not attempt to open or
repair unless you are a qualified electrical tradesperson and you have had training in power measurements and
troubleshooting techniques.
If major complex subassemblies are faulty, then the Welding Power Source must be returned to an
Accredited CIGWELD Service Agent for repair.
The basic level of troubleshooting is that which can be performed without special equipment or
knowledge.
15.1 TIG Welding Problems
FAULT
1
Electrode melts when
arc is struck.
2
Dirty weld pool.
3
POSSIBLE CAUSE
REMEDY
Electrode is connected to the ‘+’
terminal.
Connect the electrode to the ‘−’
terminal.
A Electrode contaminated through
contact with work piece or filler
rod material.
A Clean the electrode by grinding off
the contaminates.
B Gas contaminated with air.
B Check gas lines for cuts and loose
fitting or change gas cylinder.
Electrode melts or
A No gas flowing to welding region.
oxidises when an arc is
struck.
B Torch is clogged with dust.
A Check the gas lines for kinks or
breaks and gas cylinder contents.
B Clean torch
C Gas hose is cut.
C Replace gas hose.
D Gas passage contains impurities.
D Disconnect gas hose from torch
then raise gas pressure and blow
out impurities.
E Gas regulator turned off.
E Turn on.
F Torch valve is turned off.
F Turn on.
G The electrode is too small for the
welding current.
G Increase electrode diameter or
reduce the welding current.
4
Poor weld finish.
Inadequate shielding gas.
Increase gas flow or check gas line
for gas flow problems.
5
Arc flutters during
TIG welding.
Tungsten electrode is too large for
the welding current.
Select the right size electrode.
Refer to Table 3.
6
Welding arc can not be A Work clamp is not connected to the A Connect the work clamp to the
work piece or connect the
established.
work piece or the work/torch leads
work/torch leads to the right
are not connected to the right
welding terminals.
welding terminals.
B Torch lead is disconnected.
B Connect it to the ‘−‘ terminal.
C Gas flow incorrectly set, cylinder
empty or the torch valve is off.
C Select the right flow rate, change
cylinders or turn torch valve on.
26
Transarc 141VRD, 161VRD
FAULT
7
Arc start is not
smooth.
POSSIBLE CAUSE
REMEDY
A Tungsten electrode is too large for
the welding current.
A Select the right size electrode.
Refer to Table 3.
B The wrong electrode is being used
for the welding job
B Select the right electrode type.
Refer to Table 4.
C Gas flow rate is too high.
C Select the correct rate for the
welding job.
Refer to Table 3.
D Incorrect shielding gas is being
used.
D Select the right shielding gas.
Refer to Table 6.
E Poor work clamp connection to
work piece.
E Improve connection to work piece.
15.2 Stick Welding Problems
FAULT
POSSIBLE CAUSE
REMEDY
1 Gas pockets or voids in A Electrodes are damp.
weld metal (Porosity). B Welding current is too high.
C Surface impurities such as oil,
grease, paint, etc.
A Dry electrodes before use.
B Reduce welding current.
C Clean joint before welding.
2 Crack occurring in
weld metal soon after
solidification
commences
A Redesign to relieve weld joint of
severe stresses or use crack
resistance electrodes.
B Travel slightly slower to allow
greater build-up in throat.
C Preheat plate and cool slowly.
A Rigidity of joint.
B Insufficient throat thickness.
C Cooling rate is too high.
3 A gap is left by failure A Welding current is too low.
of the weld metal to fill B Electrode too large for joint.
the root of the weld.
C Insufficient gap.
D Incorrect sequence.
A Increase welding current
B Use smaller diameter
electrode.
C Allow wider gap.
D Use correct build-up sequence.
Figure 3 – Example of insufficient gap or incorrect sequence
Stick Welding Problems (Continued)
FAULT
4 Portions of the weld
run do not fuse to the
surface of the metal or
edge of the joint.
POSSIBLE CAUSE
REMEDY
A Small electrodes used on heavy
cold plate.
A Use larger electrodes and pre-heat
the plate.
B Welding current is too low.
B Increase welding current
C Wrong electrode angle.
C Adjust angle so the welding arc is
directed more into the base metal
D Travel speed of electrode is too
high.
D Reduce travel speed of electrode
E Scale or dirt on joint surface.
E Clean surface before welding.
27
Transarc 141VRD, 161VRD
Figure 4 – Example of lack of fusion
5 Non-metallic particles A Non-metallic particles may be
are trapped in the weld
trapped in undercut from previous
metal (slag inclusion).
run.
A If bad undercut is present, clean slag
out and cover with a run from a
smaller diameter electrode.
B Joint preparation too restricted.
B Allow for adequate penetration and
room for cleaning out the slag.
C Irregular deposits allow slag to be
trapped.
C If very bad, chip or grind out
irregularities.
D Lack of penetration with slag
trapped beneath weld bead.
D Use smaller electrode with sufficient
current to give adequate penetration.
Use suitable tools to remove all slag
from corners.
E Rust or mill scale is preventing full E Clean joint before welding.
fusion.
F Wrong electrode for position in
which welding is done.
F Use electrodes designed for position
in which welding is done, otherwise
proper control of slag is difficult.
Figure 5 – Examples of slag inclusion
28
Transarc 141VRD, 161VRD
15.3 Power Source Problems
FAULT
CAUSE
1 The welding arc cannot A The Mains supply voltage has not
been switched ON.
be established. The
overload light is not
B The Welding Power Source switch
illuminated.
is switched OFF.
C Loose connections internally.
REMEDY
A Switch ON the Mains supply
voltage.
B Switch ON the Welding Power
Source.
C Have an Accredited CIGWELD
Service Agent repair the connection.
2 The Mains supply
voltage is ON, the
display reads
“OVERLOAD” and
the welding arc cannot
be establish.
The Welding Power Source’s duty
cycle has been exceeded.
Wait for the OVERLOAD text to
extinguish before resuming your arc
welding
3 The Mains supply
voltage is ON, the
display reads “INPUT
ERROR (V)” and the
welding arc cannot be
establish.
The mains input voltage to the
Power Source is greater than 264V
ac.
Have an Accredited CIGWELD
Service Agent or a qualified
electrician check the 240V ac mains
input voltage. If the mains input
voltage is less than 264V ac then get
an Accredited CIGWELD Service
Agent to check the Power Source.
4 The Mains supply
voltage is ON, the
overload light is
illuminated, the Welder
has not been used for
more than one hour
and the welding arc
cannot be establish.
The Welding Power Source’s
thermostat has malfunctioned.
Have an Accredited CIGWELD
Service Agent repair or replace the
thermostat.
5 Maximum output
welding current can not
be achieved with 240V
Mains supply voltage.
Defective control circuit
Have an Accredited CIGWELD
Service Agent inspect then repair the
welder.
6 The Mains supply
voltage has been
switched ON but the
FAN does not operate.
7 Welding current
reduces when welding
The fan has failed or it has a poor
electrical connection.
Have an Accredited CIGWELD
Service Agent repair or replace the
fan.
Poor work lead connection to the
work piece.
Ensure that the work lead has a
positive electrical connection to the
work piece.
29