Nielsen CT4973 Operation instructions

PROCESSES
MIG/MAG Welding MMA welding
Description
Arc Welding Power Source
INVERTER MIG/MAG, FLUX, MMA
CT4973
.
ORIGINAL INSTRUCTION
Cannon Tools Limited
Address: 20 Station Road, Rowley Regis, West Midlands, B65 0JU.U.K
Work like a Pro! Pros weld and cut safely.
Please read the User’s Manual carefully before using the machine.

EC DEC LARATION OF CONFORMITY
We CANNON TOOLS LTD
20 Station road,Rowley Regis,West Midlands,B65 0JU.U.K.
Declare that the following machine complies with the appropriate basic
safety and health requirements of the EC Directive based on its design and
type, as brought into circulation by us.
In case of alteration of the machine, not agreed upon by us, this declaration
will lose its validity.
Product description: INVERTER MIG/MAG, FLUX, MMA
Model: CT4973
Applicable EC Directives:
EC Low Voltage Directive 2014/35/EU
EC Directive of Electromagnetic Compatibility 2014/30/EU
Harmonized standards
EN 60974-1：2012
EN 60974-10：2014/A1：2015
20 Station Road,Rowley Regis,West Midlands,B65 0JU.U.K.
Mr. Gurcharan Tony Singh Sanghera
Managing Director
CANNON TOOLS LTD
2018.09.07

CONTENTS
SAFETY RULES.......................................................... .................................................................................................2
IDENTIFYING SAFETY INFORMATION
●These symbols are being used to identify potential risks.
●When seen a safety symbol in the manual, it must be understood that there is an injury risk and following
instructions must be read carefully to avoid potential risks.
●While welding, keep the third persons and especially the children away from the work area.
UNDERSTANDING THE SAFETY WARNINGS
Read carefully the manual and the labels and the safety warnings on the machine.
●Make sure that the warning labels positioned on your machine are in good order. Renew the damaged and the
missing labels.
●Learn to operate the machine and how to make the controls properly.
●Operate your machine in convenient work areas. Improper modifications affect the safety of your machine
negatively and shorten its lifetime.
ELECTROMAGNETIC COMPATIBILITY（EMC）........................................................................................ ...... 6
1. TECHNICAL INFORMATIONS........................................................ ..................................................................7
1.1 GENERAL EXPLANATIONS.................................................. .....................................................................7
1.2 APPLICATION AREA ........................................................ ...........................................................................7
1.3 SYMBOL AND MEANING ON DATA PLATE............................................................................................7
1.4 TECHNICAL SPECIFICATIONS................................................. ....................................................... ..........8
2. INSTALLATION..................................................................................... ..................................................... .......9
2.1 UPON RECEIPT AND CLAIMS........................................................... ..................................................... ...9
2.2 WORK AREA ........................................................................................... .............................................. .......9
2.3 INSTALLATION AND USAGE OF THE MACHINE ................................................ ................................. 9
2.3.1 CONNECT THE MACHINE TO POWER SUPPLY............................................................. ... ........10
2.3.2 CONNECT THE ELECTRODE HOLDER FOR MMA..................................................... ... ........10
2.3.3 CONNECT THE EARTH WELDING CABLE TO THE MACHINE....................... ... ....................10
2.3.4 CONNECT THE EARTH CLAMP......................................................................................... ... .......10
2.3.5 CONNECT THE GAS CYLINDER...................................................................................... ... .........12
2.3.6 THREAD THE WELDING WIRE.................................................................................... ... ..............12
3. USAGE INFORMATION.......................................................................................................................... ... ......13
3.1 THE POWER SOURCE FRONT PANEL ............................................................................................... ... .......13
3.2 THE POWER SOURCE BACK PANEL ............................................................................................... ... .......13
3.3 ADJUSTING THE GAS FLOW.......................................................................................................... ... .......13
3.4 ALIGNING DRIVE ROLLS FOR APPROPRIATEWIRE DIAMETER.................................................. ....13
3.5ADJUSTING THE FREE WIRE LENGTH ,WELDING CURRENT AND VOLTAGE ...................... .......13
3.6 THE FUNCTIONS OF THE GUN SWITCH ...................................................................................... ... ......14
3.7 SETTINGS FOR ALUMINUM WELDING........................................................................................ ..........14
4. MAINTENANCE AND TROUBLESHOOTING........................................................................................ ........15
4.1 PERIODIC MAINTENANCE................................................................................................................ ... ....15
4.2 NONPERIODIC MAINTENANCE.................................................................................................... ... .......16
4.3 BASIC TROUBLESHOOTING ..................................................................................................... ... ...........16
-1-

SAFETY RULES
ELECTRICAL SHOCK COULD BE FATAL
Installation procedure must comply with national electricity standards and other
relevant regulations and ensure that installation is performed by qualified persons.
●Wear dry, hole-free insulating gloves and body protection.
●Do not touch electrode with bare hand. Do not wear wet or damaged gloves and
body protection.
●Do not touch live electrical parts.
●Never touch electrode while in contact with working surface, ground or another
electrode which is connected to a different machine .
●Protect yourself from electric shock by insulating yourself from work and ground.
Use non-flammable, dry insulating material if possible, or use dry rubber mats, dry
wood or plywood, or other dry insulating material big enough to cover your full area
of contact with the work or ground, and watch for fire.
●Never connect up more than 1 electrodes or wires to the machine.
●Turn off the machine, when not in use .
●Disconnect input plug or power before working on machine.
●Frequently inspect input power cord for damage or bare wiring - repair or replace
cord immediately if damaged.
●Be sure input ground wire is properly connected to a ground terminal in disconnect
box or receptacle.
BREATHING WELDING FUMES CAN BE HAZARDOUS TO YOUR HEALTH
Inhaling fumes and gases over a long period of time, generated during welding is dangerous and
forbidden .
●Irritation of the eyes, nose and throat are symptoms of inadequate ventilation. Take immediate
steps to improve ventilation. Do not continue welding if symptoms persist.
●Install a natural or forced air ventilation system in the work area.
●Install an adequate ventilation system in the welding and cutting area, if needed
install a system that can remove the fume and vapor accumulated in the entire work
area, to prevent pollution use adequate filtration in discharge.
●In the event of welding in small, confined places, or welding lead, beryllium,
cadmium, zinc, zinc coated or painted materials; also wear a fresh air supplied
respirator in addition to the above mentioned rules .
●Always have a trained watch-person nearby, while working in small confined places.
Avoid working in such confined places if possible.
●If gas cylinders are grouped in a different area, make sure that it is a well-ventilated
area. When not being used, turn off the cylinder valve .
●Shielding gasses such as argon is denser than air and when being used in confined
places, can be inhaled in place of air, and this is dangerous for your health.
●Do not perform welding operations near chlorinated hydrocarbon vapors produced
by degreasing or painting.
-2-

SAFETY RULES
ARC RAYS CAN BURN EYES AND SKIN
●Use adequate welding helmet with correct shade of filter (4 or 13 considering TS EN
379) to protect your eyes and face.
●Protect open parts of your body (arms, neck and ears) from arc rays by adequate
protective clothing.
●To protect others by arc rays and hot metals, surround the working area with flame
proof curtains which are higher than eye level and put up warning boards.
FLYING METALS CAN INJURE EYES
●Welding, wire brushing and grinding cause sparks and flying metal.
●To prevent injuries wear appropriate safety glasses with side shields even under your welding helmet .
NOISE CAN DAMAGE HEARING
●Noise from certain industrial processes or equipment can damage hearing.
●Wear approved ear protection if noise level is high.
HOT PARTS CAN CAUSE SEVERE BURNS
●Do not touch hot parts.
●Allow cooling time before servicing.
●If needed to hold hot parts, use appropriate tool, insulating gloves and fireproof clothes.
MOVING PARTS CAN CAUSE INJURY
●Keep away from moving parts.
●Keep all doors, panels, and guards closed and secured.
●Wear shoes with metal protection over the fingers.
WORKING IN SMALL AND CONFINED PLACES CAN BE DANGEROUS
●While welding and cutting in small, confined places, always have a trained watch-person nearby.
●Avoid working in such confined places.
-3-

SAFETY RULES
WELDING WIRE MAY CAUSE INJURY
●Do not point the gun toward any part of a human body, other persons or any type of metal when unwinding
welding wire.
●While extracting the wire from the spool by hand, it may spring suddenly and injure you or a nearby person,
protect especially your eyes and face.
●Make sure that there is no one close.
WELDING CAN CAUSE FIRE OR EXPLOSION
●Never weld near flammable material. It may cause fire or explosions.
●Before starting to weld, move flammables away or protect them with flame-proof
covers.
●Do not weld on and cut closed tubes or pipes.
●Before welding on closed containers, open and clear them entirely. Welding
operations on these parts must be performed with the utmost caution.
●Never weld containers or pipes containing or which have contained substances
that could give rise to explosions.
Welding equipment warms up so never position them on flammable surfaces.
●Welding sparks can cause fire. For that reason, keep extinguishing means, such as fire
extinguishers, water and sand easy reach.
●Have and maintain security valves, regulators and other valves on the flammable,
explosive and compressed gas circuits in good condition by periodical controls,
used for welding and cutting operations.
FALLING UNIT CAN CAUSE INJURY
Wrong positioned power source or other equipment may cause serious injury to persons
or damage to objects.
●While re-positioning the power source always carry by using the lifting eye. Never pull cable, hose or Gun.
Always carry the gas cylinders separately.
●Before carrying the welding and cutting equipment, disassemble all the connections between and
separately carry the small ones by handgrips and the big ones by lifting eyes or by using appropriate
vehicles like forklifts.
●Install your machine on flat platforms having maximum 10° slope that it does not fall over. Install it on well
ventilated, non-confined places away from the dust, also avoiding the risk of falling caused by cables and
hoses. For gas cylinders not to fall over, attach it to the mobile machine or to the wall with a chain.
●Ensure that operators easily reach the controls and connections on the machine.
-4-

SAFETY RULES
MAINTENANCE MADE BY UNQUALIFIED PERSONS MAY CAUSE INJURIES
●Electrical devices should not be repaired by unqualified persons. Improper repairs can cause serious
injuries or even death during applications.
●The components of the gas circuit works under pressure. The service given by unqualified persons may
cause explosions and operators can be injured seriously.
OVERUSE CAN CAUSE OVERHEATING
●Allow cooling period; follow rated duty cycle.
●Reduce current or reduce duty cycle before starting to weld again.
●Do not block airflow to unit.
●Do not filter airflow to unit without the approval of manufacturer
.
ARC WELDING CAN CAUSE INTERFERENCE
●Electromagnetic energy arising during welding and cutting operations can interfere with
sensitive electronic equipment such as microprocessors, computers, and computer-driven equipment such
as robots.
●Be sure all equipment in the welding area is electromagnetically compatible.
●To reduce possible interference, keep weld cables as short as possible, close together, and down low, such as on
the floor.
●To avoid possible EMC damages, locate welding operation as far as possible (100 meters) from any
sensitive electronic equipment.
●Be sure this welding machine is installed and grounded according to this manual.
●If interference still occurs, the user must take extra measures such as moving the welding machine, using
shielded cables, using line filters, or shielding the work area .
STATIC (ESD) CAN DAMAGE PC BOARDS
●Put on grounded wrist strap before handling boards or parts.
●Use proper static-proof bags and boxes to store, move, or ship PC boards.
PROTECTION
●Do not expose the welding machine to rain, protect from water drops and vapour.
LIFE TIME
●The lifetime determined by Ministry of Industry and Trade is 10 years.
OBEY ALL THE SAFETY RULES STATED IN THE MANUAL!
-5-

ELECTROMAGNETIC COMPATIBILITY（EMC）
ELECTROMAGNETIC EMISSION
●All electrical equipment generates small amounts of electromagnetic emission due to current transferring in
the equipment. Electrical emission may be transmitted through power lines or radiated through space, similar
to a radio transmitter. When emissions are received by other equipment, electrical interference may result .
Electrical emissions may affect not only welding machines but also many kinds of electrical equipment
like radio and TV reception, numerical controlled machines, telephone systems, computers etc.
●Welding and cutting machines have been designed to work for professional and industrial use; for other
applications to contact the manufacturers.
●The user is responsible for installing and using the equipment according to the manufacturer’s instructions.
If electromagnetic disturbances are detected then it shall be the responsibility of the user of the 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 the welding circuit, in other cases it could involve constructing an
electromagnetic screen enclosing the power source and the work complete with associated input filters. In all
cases electromagnetic disturbances must be reduced to the point where they are no longer troublesome.
●The circuit may or may not be earthed for safety reasons. Changing the earthing arrangements should only be
authorized 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.
●Extra precaution may be required when the welding power source is used in a domestic establishment.
●Special measures shall be taken to achieve compliance with welding power source including HF frequency for arc
ignition and stabilizing; it may be required use of shielded cables and in any case to resolve the particular
implementation (e.g. with robot, computer and any other electrical and electronic equipment connected to
welding power source) to call the technical assistance of the manufacturer.
●EMC is Class A according to CISPR II.
ASSESMENT OF THE SURROUNDING AREA
Before installing the welding equipment, the user shall make an assessment of potential electromagnetic
problems in the surrounding area. The following shall be taken into account- if needed arrange the
working hours that not coincide with those.
●Other supply cables, control cables, signaling and telephone cables; above, below and adjacent to the
welding equipment,
●Radio and television transmitters and receivers,
●Computer and other control equipment,
●Safety critical equipment,
●Presence of heart beat regulators, heart cells, hearing devices or etc. nearby,
●Equipment used for calibration or measurement,
●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.
METHODS OF REDUCING EMISSIONS
●Welding equipment should be connected to the mains supply according to the manufacturer’s recommendations.
Our welding machines are filtered against emission according to standards. If interference still occurs, it may be
necessary to take additional precautions such as filtering of the mains supply.
●The equipment should be routinely maintained according to the manufacturer’s recommendations. The
welding equipment should not be modified without the approval of manufacturer.
●The welding cables should be kept as short as possible and should be positioned close together, running at or
close to the floor level. Power cables and signal cables should be kept separately.
●Keeping cables in the shape of -8- and taping together reduce emission.
●Connect earth clamp to workpiece as close to the weld as possible. But the user should be control whether this
situation damage to people and equipment or not.
-6-

TECHNICAL INFORMATION
1. TECHNICAL INFORMATIONS
1.1 GENERAL EXPLANATIONS
1.2 APPLICATION AREA
1.3 SYMBOL AND MEANING ON DATA PLATE
Single phase input AC power supply, inverter，Rectifier，Transformer，DC current or voltage output
MIG/MAG welding or GMAW process
MMA welding process
With MIG (Metal Inert Gas) or MAG (Metal Active Gas) welding also called Gas-Shielded Metal
Arc Welding (GMAW) an arc is maintained between a continuous solid wire electrode and the work
piece. The arc and weld pool are shielded by a stream of inert or active gas. The process is suitable for
most materials and filler wires are available for a wide range of metals.
MIG/MAG welding is inherently more productive than MMA, where productivity losses occur each time a
welder stops to replace a consumed electrode. Material losses also result from MMA welding when the stub of
each electrode is thrown away. For every kilogram of coated stick electrode purchased, about 65 per cent
becomes part of the weld (the rest being discarded). The use of solid wire and flux cored wire has increased
this efficiency to 80-95 per cent. MIG/MAG welding is a versatile process, which can deposit weld metal at a
very high rate and in all positions. The process is widely used on light to medium gauge steel fabrications and
on aluminium alloy structures particularly where high-rate manual operator production is required. The
introduction of flux cored wires is finding increased application in heavy steel structures.
-7-
●CT4973 welding machines are 1 phase,
constant voltage and current ( CV and CC ) power
sources especially designed for MIG/MAG and
MMA welding.
●All the controls of welding powersourceare placed on
to the front panel for easy operation and monitoring.
●Wire feeding unit is wheel drive and it is installed in
the power source.
●Wire feeder contains motor and drived wheel, etc.
●Output voltage and wire speed or welding current
of the CT4973 welding machine can be adjusted by
a welding voltage and wire speed or welding current
adjustment knobs for MIG/MAG.
●Output welding current of the CT4973 welding
machine can be adjusted by a welding current
adjustment knob for MMA.
●CT4973 is very good selection for welding 1.2~6 mm thickness metal. It is a very good choice for
steel,stainless steel MIG/MAG welding with 0.6-1.0mm welding wires.
●CT4973 is very good selection for welding 2.0~6 mm thickness metal. It is a very good choice for
steel,stainless steel MMA welding with 1.6-4.0mm electrodes.

TECHNICAL INFORMATION
Norm:Application standards,for example,IEC60974,EN60974,etc.
U1：Rated AC input voltage of the welding power source,for example,1~(1 phase),230V.
50 HZ:Rated frequency of single phase AC power supply .
I1max：Max. input current
I1eff：Max. effective input current
X: Rated duty cycle.It is the ratio between the load duration time and the full cycle time.
Note1: This ratio is between 0~100%.
Note2: For this standard, one full cycle time is 10min.For example, if the rate is 40%, the loaded time shall be 4
minutes and rest time shall be 6 minutes.
Duty cycle is based on a ten minute period.This means that the arc may be drawn for two minutes out of
each ten minute period without any danger of overheating .If it is used more than two minutes during several
successive ten minutes periods, it may overheat.
U0：Non-load voltage. It is the open-circuit output voltage of the welding power source.
I2：output current or welding current
U2：Output load voltage or welding voltage.The rated loaded output voltage U2=14+0.05I2
A / V—A / V：The adjustable range of current and its corresponding load voltage.
S1: The rated Input Power, KVA
IP：Protection grade . For example, IP21,approving the welding machine as suitable for use indoors; IP23,. approving
the welding machine as suitable for use outdoors in the rain.
Suitable for hazardous environments.
：Beyond rain.
F or H：Insulation grade.
1.4 THE MAIN TECHNICAL SPECIFICATIONS
CT4973
Input voltage
230VAC±15%, 1 Phase
Frequency
50Hz
Output current
DC 40~180A
Output voltage
DC 16.5~26.4V
Wire Diameter
0.6mm, 0.8mm, 0.9mm,1.0mm
-8-
S

INSTALLATION
2. INSTALLATION
2.1 UPON RECEIPT AND CLAIMS
2.2 WORK AREA
2.3 INSTALLATION AND USAGE OF THE MACHINE
Only qualified persons should install,use or service this equipment. Protect yourself and others
from possible serious injury or death.
WARNING: Do not operate with covers removed.Disconnect input power before servicing.
Do not touch electrically live parts.
-9-
●Be sure that you have received all the items that you
have ordered. In case of any items are missing or damaged,
contact your supplier immediately.
●Be sure that none of the following 3items are missing in
the box.
Welding Power Source
Earth Clamp/Electrode holder and
Cable
User Manual
●Make sure that your line voltage is 1 Phase , 230V, 50
Hz for CT4973 is very good selection for welding 1.2~6 mm
thickness metal. It is a very good choice for steel,stainless
steel MIG/MAG welding with 0.6-1.0mm welding wires.
●CT4973 is very good selection for welding 2.0~6 mm
thickness metal. It is a very good choice for steel,stainless
steel MMA welding with 1.6-4.0mm electrodes.
. And you have a neutral and earth line present at your
work place.
●In order to cool down the machine and have
an efficient work, keep the machine at least 30
cm away from the surrounding objects. Do not
place any heat source, as oven, to front side of
the machine where the cooling air is taken from.
Welding machine must not be effected of heat
directly.
●Do not place the machine in small and narrow
places. Beware of excessive dust and dirt.
●Keep your machine away from wet and humid
places.
●Do not operate the machine under direct sunlight, rain
and wind. Machines should be operated on lower
capacities when ambient air temperature exceeds 40ºC.
●Please use a suitable exhaust system for gases
●Transport and place the device on firm and
level ground so that it may not fall over. The
maximum permissible angle of inclination
for transport and assembly is 10°.
●If the cylinder is placed on the machine
lock the chain to secure the tube, if not be
sure that gas cylinder is chained vertically to a
wall.
●This machine is protected electronically
against overloading. Do not use stronger fuses
than those stated on the type plate of the
device.
●Ensure that the earth clamp has good and
direct contact near the welding location. Do
not direct welding current over chains, ball
bearings, steel cables, protection conductors
etc., Otherwise they may melt.
●Ensure that operators can easily reach the
machine controls and equipment connections.
●Use lifting eyes for lifting the machine.
Do not lift the machine by using a fork-lift or
a similar vehicle.
●The electrical socket behind machine is
only for heating CO2. Do not use it for any
other purpose.

INSTALLATION
●Before starting the installation,check with the power company to be sure your power supply is adequate
for the voltage,amperes,phase,and frequency specified on the welding machine nameplate,Also be sure the
planned installation will meet all local and national code requirements.Some welding machines may be
operated from a single phase line or from one phase of a two or three phase line.
●Before connecting the input cable to the power supply,check that the power(on-off) switch operates in
the position corresponding to the input voltage that the machine will be connected to.
CAUTION :If the power switch setting does not match the input power voltage,you may burn up the
welding machine!
●Connect the “PE” or green/yellow grounding wire in the input cord to a system ground per the
applicable national and local codes.
2.3.1 CONNECT THE MACHINE TO POWER SUPPLY
●The connection to the main lines is made by the end user. It has to be performed by qualified electricians or by
the people trained in this area.
●Power supply cable to the machine must be connected to the main power supply switch.The main power
supply has been labeled in the nameplate of the machine,for example,1～，50 Hz，230VAC.
●For CT4973（1～，50 Hz，230VAC）, the 3G1.5mm² power supply cable should be used.
●Before turning on the main power supply switch user must check carefully these connections of the power
supply cable and earth cable (Yellow/Green) to the machine.
Be sure that connection s are fastened tightly. Loose or incorrect fastening may
cause the connection to overheat or burn. Unexpected results may occur if a mistake
is made in the network connection.Pay attention that the connection of the earth
cable (Yellow/Green) to P E e n d o f the machine.
2.3.2 CONNECT THE ELECTRODE HOLDER FOR MMA
●Connect the Electrode holder to the Red connector (on the front panel) of the welding machine for MMA. Be sure
that connections are correct and not Loose.
2.3.3 CONNECT THE EARTH WELDING CABLE TO THE MACHINE
●Connect the one end of the earth welding cable to the work-piece,and the other end should be connected to
Output(-) (Black connector on the front panel ) of the welding machine.
2.3.4 CONNECT THE EARTH CLAMP
●Connect the earth clamp firmly to the welding bench or the work-piece.
●To increase the quality of the welding, earth clamp on the work piece should be clamped tightly and as close to
the welding area as possible. For more detail please refer to the Welding Parameter Selection table.
Do not place the earth clamp on the welding machine or the gas cylinder;
otherwise the welding current will be carried via the protective conductors and
it will destroy these.
-10-

INSTALLATION
Figure 1: The front panel of Welding power source
Connection of Gun and Welding cable on the front panel:
●Output (＋) or welding Gun connector : Connect to the Gun for MIG/MAG welding process.
●Output (－) or Black connector:Connect to the work-piece for MIG/MAG and MMA welding process.
●Output (＋) or the Red connector:Connect to the Electrode holder for MMA
-11-
Over-heat and
Over-current LED2
Wire Inching for
MIG/MAG
Power LED1
MIG/MAG or MMA
Selection
Welding Current
for MMA
Welding Current
for MIG/MAG
Welding Voltage
for MIG/MAG

INSTALLATION
2.3.5 CONNECT THE GAS CYLINDER
●After placing the gas cylinder , fasten it with the chain. To operate safely and get best results use approved gas
regulators and heaters.
●Briefly open the gas cylinder valve several times in order to blow out any dirt and particles present .
●Connect the pressure regulator to the shielding gas cylinder .
●Connect one end of gas hose to the gas supply inlet or gas input of the welding machine . The other end is for
connecting the hose to pressure regulator.
●Screw the gas hose pressure regulator and open the shielding gas cylinder.
●Setting of the gas flow with the adjustment valve. For more information about gas adjustment check the
following page.
●Connect power supply cable of gas Heater to heater power supply of the welding power source.
Figure 2: Open the gas valve and Setting of gas flow
2.3.6 THREAD THE WELDING WIRE
To avoid any problems during operation, this part has to be understood correctly.
Inappropriate and incomplete operation may result in poor welding quality and harm the
gun, this kind of failures are out of warranty.
●Ensure that the diameters of the drive rolls are correct.
●Raise the pressure assembly of the drive rolls(flange).
●Thread the wire to the gun through the guides into the liner.
●Close and tighten pressure assembly.
-12-
Gas hose
The gas cylinder
Open the gas cylinder
valve
Setting of gas flow
with the adjustment
valve
Show gas flow
rate
Power supply cable
of Heater

USAGE INFORMATION
3. USAGE INFORMATION
3.1 THE POWER SOURCE FRONT PANEL
●On the front control panel of the welding power source,there are Pilot lights, Welding current and voltage
controller,etc(Figure 1).
●LED1: Pilot light of the power supply. The LED1 is lighted when SW1 switch is ON.
●LED2: Pilot light of Over-heating or Over current.The LED2 is lighted with thermal overload protection.
●Knob of Welding Current or wire feed speed for MIG/MAG: Welding current controller for MIG/MAG.
Welding current is controlled by the controller of the wire feed speed.Welding current controller for
MMA.Welding current is controlled by the controller.
●Knob of Welding Voltage for MIG/MAG: Welding voltage controller. Welding voltage is controlled by
the controller for MIG/MAG.
3.2 THE POWER SOURCE BACK PANEL
●SW1: ON/OFF Switch of the welding power source.
●Power source cable, for example,1～，50 Hz，230 VAC.
●Gas Input.
3.3 ADJUSTING THE GAS FLOW
●The indicators on the regulator at the tube side shows the pressure and the other shows the flow rate “L/min”.
●Appropriate gas flow rate must be between 7 and 9 times of the diameter of the wire in use. The practical ratio is 8.
EXAMPLE: Diameter of the wire: 0,8 mm.
Gas flow rate: 8 x 0,8 ≈6 L/min
3.4 ALIGNING DRIVE ROLLS FOR APPROPRIATEWIRE DIAMETER
Always control the rolls on the flange for compatibility with diameter of the
wire, because alignment problems are out of warranty.
●Both sides of the rolls are labeled according to appropriate wire diameter.
●Rolls must be inserted into the flange in such a way that appropriate diameter of the wire to be feeded is seen
from outside. After installing the rolls, the screws should be positioned and fastened.
3.5 ADJUSTING THE FREE WIRE LENGTH,WELDING CURRENT AND VOLTAGE
●In order to obtain good welding characteristics, free wire length (L1) has to be adjusted by the following
instructions. The diameter of the wire (d) and the distance (L) between the nozzle and the contact tip is
important.
●Free wire length (L1) is the distance between the end of wire and the contact tip.
●Free wire length (L1) may be varied by the adjusting welding current (I2) and voltage(U2).
●For Short Circuit Transfer Arc,L is about 0~3mm, L1is about 10d.For example,d=1.0mm,L1=10mm.
For Short Circuit Transfer Arc,U2is about 16~26V,I2is about 60~180A.
-13-

USAGE INFORMATION
3.6 THE FUNCTIONS OF THE GUN SWITCH
●When operating, once the gun switch is triggered, wire feeding and current starts when it is released the welding
operation ends. Welding current and voltage are controlled by the knob of welding current and voltage in
Figure 1 .
ON OFF
Figure 3 : Relations between Welding Arc and the gun switch on/off
3.7 SETTINGS FOR ALUMINUM WELDING
●Argon must be used as protective gas. In this case the gas heater is not necessary.
●Less pressure of theWire feeding roll should be applied on these rolls than steel.
●Longer and larger inner diameter contact tips should be used.
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MAINTENANCE AND TROUBLESHOOTING
4. MAINTENANCE AND TROUBLESHOOTING
Only qualified persons should install,use or service this equipment. Protect yourself and others
from possible serious injury or death.
WARNING: Do not operate with covers removed.Disconnect input power before servicing.
Do not touch electrically live parts.
WARNING: Before removing any screw on the machine for maintenance, power supply must be
disconnected from the electric lines and enough time should be allowed for capacitor discharging. During
maintenance, pay attention to the moving parts in the machine such as ventilator, wire feeding motor, rolls
and, wire spool.
4.1 PERIODIC MAINTENANCE
Once every three months
●Clean the labels on the m a c h i n e . R e p a i r o r replace the worn out labels.
●Repair or replace the worn out welding cables.
●Clean and tighten weld terminals.
●Check Gun, earth clamp and their cables.
●Check the main connections inside the machine.
Once every six months
●Open the covers of the machine and clean with dry air.
NOTE: The above recommended maintenance periods are indicative according to our
general experience, these may vary from work shop to work shop and the conditions of the
welding site.
4.2 NONPERIODIC MAINTENANCE
●Wire feeding rolls and the surrounding parts should be kept clean and the surface of
the drive rolls should definitely not be lubricated. Each time the wire is replaced, the
dirt accumulated on the mechanism must be cleaned with dry air .
●Contact tip and nozzle on the gun have to be cleaned regularly and changed if required.
Contact tips must be in good condition, longer tips generally give better results.
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MAINTENANCE AND TROUBLESHOOTING
4.3 BASIC TROUBLESHOOTING
TROUBLE
REASON
REMEDY
1.Machine does not work.
Power source switch is out of order.
Change the switch.
Fuse is blown out.
Change the fuse.
Electronic Card is out of order.
Contact your authorized technical service.
2. The welding machine is
operated, LED1 is off, no
output, the fan is not
running.
Possible function failure of power switch.
Compensate it if necessary.
Possible short circuit of input cable.
Compensate it if necessary.
Fan motor is out of order.
Change the Fan motor.
3.Wire feeder works but
wire is not fed.
The drive roll is not appropriate for the
wire diameter.
Select the appropriate drive roll.
Pressure in the pressure roll is not
enough.
Adjust the pressure.
4．Trouble in welding
operation.
Contact tip size is wrong or bad.
Change the contact tip.
Pressure in the pressure roll is not
enough.
Adjust the pressure roll.
CO2heater fuse is blown out.
Check and Replace it if necessary.
Protective gas pressure is not
appropriate.
Check the gas and adjustment.
5. While this welding
machine is operated, the
LED2 is on, no current
output.
It is possible of over-heating protection status.
Wait till the LED2 is off, and the welding
operation will be available.
It is possible of over-current protection status.
Wait till the LED2 is off, or switch off the
power supply, restart ON/OFF Switch of the
welding machine.
The secondary rectifier of transformer is possibly
damaged.
Check and Replace it if necessary.
The feed back circuit is possibly damaged.
Check and Replace it if necessary.
Possible unavailability of the connection of switch.
Check and Reconnect it.
6．Welding current or
voltage cannot be adjusted.
The main control PCB is out of order.
Change the control PCB
7．Welding current or
voltage isn’t stabilized.
Pressure in the pressure roll is not
enough.
Adjust the pressure roll.
Gas flow rate is not enough.
Adjust the gas flow rate
Circuits are possibly damaged.
Check and replace them if necessary.
Possible capacitors are possibly damaged.
Replace them if necessary.
Possible unavailability of connection inside this
welding machine.
Check and reconnect if necessary.
Possible disconnection of earth cable, or
unavailability of connection of the earth cable and
work-piece.
Check and reconnect if necessary.
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CANNON TOOLS LTD
Add: 20 station road, Rowley Regis, west midlands,B65 0JU.U.K.
Made in China
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