Jasic MIG 350 Pulse Separate User manual

Operator Manual
www.jasic.co.uk
MIG Series
|MIG 350 Pulse Separate (JM-350P) |

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Your new product
Thank you for selecng this Jasic Technology, Wilkinson Star product.
This product manual has been designed to ensure that you get the most from your new product. Please
ensure that you are fully conversant with the informaon provided paying parcular aenon to the
safety precauons. The informaon will help protect yourself and others against the potenal hazards
that you may come across.
Please ensure that you carry out daily and periodic maintenance checks to ensure years of reliable and
trouble free operaon.
Wilkinson Star Limited are a leading supplier of equipment in the UK and our products are supported by
our extensive service network. Call your distributor in the unlikely event of a problem occurring. Please
record below the details from your product as these will be required for warranty purposes and to en-
sure you get the correct informaon should you require assistance or
spare parts.
Date purchased ________________________________________
From where ________________________________________
Serial Number ________________________________________
(The serial number will normally be located on the equipment data plate on the underside of the ma-
chine or on the rear panel)
Please note products are subject to connual development and may be subject to change without noce

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SAFETY
These general safety norms cover both arc
welding machines and plasma cung machines
unless otherwise noted.
The equipment must only be used for the purpose
it was designed for. Using it in any other way
could result in damage or injury and in breach of
the safety rules.
Only suitably trained and competent persons
should use the equipment. Operators should
respect the safety of other persons.
Prevenon against electric shock
The equipment should be installed by a qualied
person and in accordance with current standards
in operaon. It is the users responsibility to ensure
that the equipment is connected to a suitable
power supply. Consult with your ulity supplier if
required
If earth grounding of the work piece is required,
ground it directly with a separate cable.
Do not use the equipment with the covers
removed.
Do not touch live electrical parts or parts which
are
electrically charged.
Turn o all equipment when not in use.
Cables (both primary supply and welding) should
be
regularly checked for damage and overheang. Do
not use worn, damaged, under sized, or poorly
jointed cables.
Ensure that you wear the correct protecve
clothing, gloves, head and eye protecon.
Insulate yourself from work and ground using dry
insulang mats or covers big enough to prevent
any physical contact with the work ground.
Never touch the electrode if you are in contact
with the work ground, or another electrode from
a dierent machine.
Do not wrap cables over your body.
Ensure that you take addional safety precauons
when you are welding in electrically hazardous
condions such as damp environments, wearing
wet clothing, and metal structures. Try to avoid
welding in cramped or restricted posions.
Ensure that the equipment is well maintained.
Repair or replace damaged or defecve parts
immediately. Carry out any regular maintenance
in accordance with the manufacturers
instrucons.
Safety against fumes and welding gases
Locate the equipment in a well-venlated
posion.
Keep your head out of the fumes. Do not breathe
the fumes.
Ensure the welding zone is in a well-venlated
area. If this is not possible provision should be
made for suitable fume extracon.
If venlaon is poor, wear an approved respirator.
Read and understand the Material Safety Data
Sheets (MSDS’s) and the manufacturer’s
instrucons for metals, consumable, coangs,
cleaners, and de-greasers.
Do not weld in locaons near any de-greasing,
cleaning, or spraying operaons. Be aware that
heat and rays of the arc can react with vapours to
form highly toxic and irritang gases.
Do not weld on coated metals, unless the coang
is removed from the weld area, the area is well
venlated, and while wearing an air-supplied
respirator. The coangs on many metals can give
o toxic fumes if welded.
Prevenon against burns and radiaon
Arc rays from the welding process produce
intense, visible and invisible (ultraviolet and
infrared) rays that can burn eyes and skin.
Wear an approved welding helmet ed with a

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proper shade of lter lens to protect your face and
eyes when welding or watching.
Wear approved safety glasses with side shields
under your helmet.
Never use broken or faulty welding helmets.
Always ensure there are adequate protecve
screens or barriers to protect others from ash,
glare and sparks from the welding area. Ensure
that there are adequate warnings that welding or
cung is taking place.
Wear suitable protecve ame resistant clothing.
The sparks and spaer from welding, hot work
pieces, and hot equipment can cause res and
burns
Welding on closed containers, such as tanks,
drums, or pipes, can cause them to explode.
Accidental contact of electrode to metal objects
can cause arcs, explosion, overheang, or re.
Check and be sure the area is safe and clear of
inammable material before carrying out any
welding.
Protecon against noise
Some welding and cung operaons may
produce noise.
Wear safety ear protecon to protect your
hearing.
Protecon from moving parts
When the machine is in operaon keep away from
moving parts such as motors and fans. Moving
parts, such as the fan, may cut ngers and hands
and snag garments.
Protecons and coverings may be removed for
maintenance and controls only by qualied
personnel, aer rst disconnecng the power
supply cable.
Replace the coverings and protecons and close
all doors when the intervenon is nished, and
before starng the equipment.
Take care to avoid geng ngers trapped when
loading and feeding wire during set up and
operaon.
When feeding wire be careful to avoid poinng it
at other people or toward your body.
Always ensure machine covers and protecve
devices are in operaon.
Precauons against re and explosion
Avoid causing res due to sparks and hot waste or
molten metal
Ensure that appropriate re safety devices are
available near the cung / welding area.
Remove all ammable and combusble materials
from the cung / welding zone and surrounding
areas
Do not cut/weld fuel and lubricant containers,
even if empty.
These must be carefully cleaned before they can
be cut/ welded.
Always allow the cut/welded material to cool
before touching it or placing it in contact with
combusble or ammable material.
Do not work in atmospheres with high
concentraons of combusble fumes, ammable
gases and dust.
Always check the work area half an hour aer
cung to make sure that no res have begun.
Risks due to magnec elds
The magnec elds created by high currents may
aect the operaon of pacemakers or
electronically controlled medical equipment.
Wearers of vital electronic equipment should
consult their physician before beginning any arc
welding, cung, gouging or spot welding
operaons.
Do not go near welding equipment with any
sensive electronic equipment as the magnec
elds may cause damage.

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RF Declaraon
Equipment that complies with direcve
2004/108/EC concerning electromagnec
compability (EMC) and the technical
requirements of EN60974-10 is designed for use
in industrial buildings and not those for domesc
use where electricity is provided via the low
voltage public distribuon system. Dicules may
arise in assuring class A electromagnec
compability for systems installed in domesc
locaons due to conducted and radiated
emissions.
In the case of electromagnec problems, it is the
responsibility of the user to resolve the situaon.
It may be necessary to shield the equipment and
t suitable lters on the mains supply.
LF Declaraon
Consult the data plate on the equipment for the
power supply requirements.
Due to the elevated absorbance of the primary
current from the power supply network, high
power systems aect the quality of power
provided by the network. Consequently,
connecon restricons or maximum impedance
requirements permied by the network at the
public network connecon point must be applied
to these systems.
In this case the installer or the user is responsible
for ensuring the equipment can be connected,
consulng the electricity provider if necessary.
Materials and their disposal
The equipment is manufactured with materials,
which do not contain any toxic or poisonous
materials dangerous to the operator.
When the equipment is scrapped, it should be
dismantled separang components according to
the type of materials.
Do not dispose of the equipment with normal
waste. The European Direcve 2002/96/EC on
Waste Electrical and Electronic Equipment states
the electrical equipment that has reached its end
of life must be collected separately and returned
to an environmentally compable recycling
facility.
Handling of Compressed gas cylinders and
regulators
All cylinders and pressure regulators used in
welding operaons should be handled with care.
Never allow the electrode, electrode holder or
any other electrically “hot” parts to touch a
cylinder.
Keep your head and face away from the cylinder
valve outlet when opening the cylinder valve.
Always secure the cylinder safely
Never deface or alter any cylinder

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Product Overview
The main circuit of this product uses full-bridge converng
technology based on the tradional PWM (pulse width
modulaon) and current control mode, It uses insulated gate
bipolar transistors (IGBT) as its switching devices. By
adopng advanced so switching technology, the switching
loss of the switching device is greatly reduced, thereby the
product eciency is increased, and consequently the
reliability and stability of this machine is improved. By
adopng internaonally advanced DSP digital technology
and with abundant funcons and good performance, this
machine is an all-digital inverter welder with pulse MIG/
MAG and standard MIG/MAG. When compared with the
tradional welding machine, it mainly has the following
characteriscs.
Abundant funcons: This product has many welding modes
available, such as MIG/MAG, pulse MIG/MAG and double-
pulse MIG/MAG, etc. At the same me, there are many
oponal operaon modes under each welding mode, such as
spot welding, 2T and 4T, etc. Welding wires of dierent
diameters between 0.8mm and 1.6mm are all applicable to
this product. Users may choose welding wires of dierent
materials and dierent diameters to weld dierent metals
and alloys according to dierent welding requirements. In
addion, parameters such as welding current, welding
voltage, ignion current, crater lling current, ignion me,
crater lling me and pulse frequency can be set via the easy
to use computer interface.
High precision and good consistency: The composion
characterisc of the tradional welding machines
determines that their performance completely depends on
the parameters of their components. That is to say, the
inconsistency in the parameters of components directly
leads to the inconsistency in the performance of the welding
machines. However, it cannot be guaranteed that the
components made by any manufacturers are completely
consistent in their parameters. Besides, highly precise
control cannot be obtained due to non-ideal features of the
operaonal amplier. Therefore, even for the welding
machines of the same brand, they oen dier from each
other. In addion, welding performance of the machine may
change to some extent, since parameters of the components
may vary according to the environment such as temperature
and humidity, etc.
This product uses a digital circuit, for which most of the
parameters are set via soware, and it is insensive to the
change of the parameters of the components. Therefore, the
consistency and stability of digital welding machine is beer
than that of tradional welding machine.
High reliability: Overheang protecon, overcurrent
protecon and input under voltage/overvoltage protecon
are all available for this product, which contributes a lot to
the reliability improvement of this product, and meanwhile
facilitates the maintenance and repair of this product.
Excellent welding performance: In order to improve the
welding performance to meet the higher requirements of
welding process, experts at home and abroad have done a
lot of work and put forward many excellent mathemacal
control models. However, such complicated mathemacal
models are very dicult to implement on the tradional
analog welding machines. Instead, they are well applied in
the digital welding machines.
Convenient opmizaon and upgrade of welding
performance: With the development and improvement of
the welding process, it is certainly required that our welding
machine has an excellent welding performance. All the
welding performance of this product is achieved by
soware. Therefore, the welding performance of this
welding machine can be opmized and upgraded by
upgrading the soware without changing any hardware
circuits.
User-friendly design: Dierences in user and using occasion
were taken into consideraon when designing this product,
so as to meet the personalized requirements of users to the
largest extent. For example, this product provides a variety
of welding torch operang modes and user-dened modes.
This product adopts synergic design. That is to say, users
only need to adjust one of the parameters, and other related
parameters would change respecvely to achieve the
opmal matching. It is unnecessary to set each parameter
independently. For example, when the user changes the
welding current, parameters such as welding voltage, wire
feed speed and base metal thickness would change
respecvely. Of course, users can make ne-tuning on
certain parameters such as welding voltage to adapt to their
welding habits.
Energy-saving and small size: This machine adopts
advanced IGBT inverter technology, which reduces the
volume and weight of the welding source and the whole
machine, improves the eciency and power factor of the
power supply, and brings signicant energy saving eect.

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Technical Data
MODEL MIG350P
Input voltage 3-phase 400V±15% (50/60Hz)
Recommended fuse capacity 32A
Rated output 350A/34V
Rated no-load voltage 70V
Rated no-load current ＜1A
Rated duty cycle (40℃)60%
Power factor COSφ≥0.85
Eciency η≥85%
Insulaon class F
Protecon class IP21S
Welding current range 10-350A
Wire feed speed range 1.0-18.0m/min
Welding voltage range 12.0-39.0V
Torch connecon Euro type
Maximum diameter of wire spool S200/S300, 300mm
Wire diameter 0.8-1.6mm
Welding modes available
DC MIG/MAG welding
Pulse MIG/MAG welding
Double-pulse MIG/MAG welding
MMA welding
Base metal opons
Carbon steel (Steel)
Stainless steel (CrNi)
Aluminium silicon alloy(AlSi 5)
Aluminium magnesium alloy (AlMg 5)
Pure aluminium (Al99.5)
Gas opons
100% CO2
80% Ar＋20% CO2
90% Ar＋5% CO2＋5% O2
98% Ar＋2% O2
100% Ar
Welding wire opons
Φ0.8 (solid wire)
Φ1.0 (solid wire or ux-cored wire)
Φ1.2 (solid wire or ux-cored wire)
Φ1.6 (solid wire or ux-cored wire)
Flux cored
User interface
Graphical coordinate panel
Single-knob step less digital adjustment
Double 3-digit display
60 Channel storage

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Parameters
MMA
Welding current range 10-350A
Arc force current range 0-99（A/ms, absolute maximum: 250A）
Arc ignion current range 10-350A
Arc ignion me range 0-0.99s
Arc breaking voltage range 40.0-80.0V
MIG/MAG
Pre-ow me 0-5.0s
Post-ow me 0-9.9s
Operaon mode 4 modes
Wire feed speed range 1.0-18.0 m/min
Welding current range 20-350A
Base metal thickness range 0.5-20.0mm
Welding voltage range 12.0-40.0V
Arc force range -15-+15
LF pulse frequency range 0.5-5.0Hz
LF pulse duraon rao range 10-90%
Upslope me 0.1-9.9s
Downslope me 0.1-9.9s

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Controls
Front Rear

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No. Name Part No Funcon descripon
1Wire feeder spool
cover 10016512 To install and protect wire feeder spool, max capacity is 20Kg.
2Wire feeder
operaon panel 10051584
Wire feeder control panel equipped with current and voltage display
window, current adjusng knob, voltage compensaon adjusng knob and
inching wire feeding key.
There is preset current display and adjustment when under MIG/MAG, can
display and adjust oset voltage, real me Current and voltage display
during welding.
3Torch connector 10051428 Can only connect Euro torch.
4Control panel 10052012 Welder human-computer interacon interface, for the selecon and
adjustment of welding funcon and welding parameters.
5Interconnecon
socket 10004702 Same funcon as the interconnecon socket on the rear panel. For the connecon of the wire feed unit interconnecon cable.
6
Welder output
terminal +
10028782
Same funcon as the output terminal + socket on the rear panel. Connects
the welding cable of the wire feed unit interconnecon cable.
Connect with electrode holder when under MMA.
7Water cooler water
inlet 10051974 Water lling inlet for the water cooler.
8Water return ng 10045169 Connect with water cooled torch’s red tube when using MIG/MAG.
9Water supply ng 10045170 Connect with water cooled torch’s blue tube when using MIG/MAG.
10
Welder output
terminal “-“
10028782 Connect with work piece.
11 Water cooler
working indicator 10006368 The indicator is on when water tank is working
12 Water cooler fuse 10006389 5A
13 Wire feeder
connecon socket 10004680 Connect with interconnecon control cable.
14 Water connecon 10045169 Connect with interconnecon red tube.
15 Water connecon 10045170 Connect with interconnecon blue tube.
16 Welding cable
connector 10040747 Connect with interconnecon welding cable.
17 Heater socket 10045461 Power supply for CO2 preheater, Output power capacity: 36V/3.5A.
18 Power switch 10004935 Welder is o when switch to “0”, welder is on when switch to “1”.
19 Fuse 10006396 5A
20 Mains input cable 10050946 Rated input voltage 3~415VAC, fuse capacity ≥40A.
21 Interconnecon
socket 10004702 Same funcon as the interconnecon socket on the front panel. For the connecon of the wire feed unit interconnecon cable.
22
Air cooling/water
cooling changeover
switch
10048969
To select torch cooling type. When air cooling is selected the water cooler
will not work. If water cooling is selected then the water cooler will work
when under MIG/MAG modes.
23
Welder output
terminal +
10028782
Same funcon as the output terminal + socket on the front panel. Connects
the welding cable of the wire feed unit interconnecon cable.
Connect with electrode holder when under MMA.
24 Water connecon 10042646 Connect with interconnecon red tube.
25 Water connecon 10042647 Connect with interconnecon blue tube.

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26 Contact pin module 10055690
Installed in welder base plate xing supports, being used for water tank
power supply,
Output power: 18V/4A.
27
Spring needle
xing plate
10055864 Fixing contact pin module
28 Welder supports 10055842 For connecon of welder and water tank. Protecon of contact pin module.
29 Conducve copper
head 10055866 Installed in water tank top supports, for water tank power supply.
30 Water tank supports 10055840 For connecon of welder and water tank, protecon of contact pin module.

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Control Panel
1Welding mode selecng zone
2 Current column parameters selecng zone
3Current column parameters display window
4Warning indicator
5Voltage column parameters display window
6Voltage column parameters selecng zone
7Welding process parameters selecng zone
8Operaon mode selecng zone
9Gas-check buon
10 Channel buon
11 Base metal selecng zone
12 Gas selecng zone
13 Wire diameter selecng zone
14 Parameter adjustment knob

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Details of the funconal zones on the power supply control panel
Welding mode selecon
This area contains components such as welding mode LEDs and
the selecng key. There are 4 welding modes, namely standard
MIG/MAG, pulsed MIG/MAG, Double pulse MIG/MAG and MMA.
Users can select the desired welding mode by pressing the se-
lecng key, and the corresponding LED will be on when a certain
welding mode is selected.
Note: The welding mode LED blinks during welding (when there is
welding current output).
Operang mode selecon
This area contains components such as operaon mode LEDs and
selecng key. There are 4 operaon modes, namely spot welding,
2T, 4T and programmed 4T . Users can select the desired operaon
mode by pressing the selecng key, and the corresponding LED will
be on when a certain operaon mode is selected.
Note: There are no such funcon in MMA.
Welding parameter selecon
1Pre-flow time
2Initial parameters (speed, current and voltage)
3Upslope time
4Peak parameters (time, current, speed, thickness, arc
characteristic, voltage, percentage and frequency);
5Base parameters (current, speed and voltage)
6Downslope time
7Crater filling parameters (current, speed and voltage)
8Post-flow time

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This area contains components such as process parameters LED and right direcon selecng key. Process
parameters include pre parameters (such as pre-ow me), inial parameters (such as speed, current and
voltage), upslope parameters (such as me and pitch rao), peak parameters (such as me, current,
speed, thickness, arc characterisc, voltage, proporon and frequency), base parameters (such as
current, speed and voltage), downslope parameters (such as me and pitch rao), crater parameters
(current, speed and voltage) and post parameters (such as post-ow me). Users can select the desired
process parameters by pressing the selecng key, and the corresponding LED will be on when a certain
segment is selected. In some cases to select the parameters to be ulmately displayed or adjusted, users
may need to make a second choice through the current column or voltage column.
Current column parameters selecng zone
9Current
10 Wire feed speed
11 Base metal thickness
12 Arc characterisc
This area contains components such as current column
parameters display meter, LEDs and selecng key. The
current column parameters include 4 parameters, namely
current (A), wire feed speed (m/min), thickness of base
metal (mm) and arc characterisc (-/+). Current column
parameters display meter can display system informaon,
actual welding current and the contents of the column parameters. Users can select the desired
parameters by pressing the selecng key, and the corresponding LED will be on when a certain parameter
is selected. Meanwhile, the contents of the selected parameter will be displayed on the meter.
Note: The meter will display the actual current when there is welding current output. To modify a
parameter, users should make corresponding LED ash by pressing the selecng key.
Voltage column parameters selecng zone
13 Voltage
14 Time
15 Pulse duraon rao
16 Frequency
It contains components such as voltage column parameters
display meter, LEDs and selecng key. The voltage column
parameters include 4 parameters, namely voltage (V), me
(s), proporon (%) and frequency (Hz). Voltage column
parameters display meter can display system informaon,

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actual welding voltage and the contents of the column parameters. Users can select the desired
parameters by pressing the selecng key, and the corresponding LED will be on when a certain parameter
is selected. Meanwhile, the contents of the selected parameter will be displayed on the meter.
Note: The meter will display the actual voltage when the main power circuit is connected. To modify a
parameter, users should make corresponding LED ash by pressing the selecng key.
Base metal selecng zone
This area contains components such as base metal LEDs
and selecng key. Base metal includes carbon steel,
stainless steel, aluminum alloy, aluminum magnesium
alloy, pure aluminum . Users can select the desired base
metal by pressing the selecng key, and the
corresponding LED will be on when a certain kind of base
metal is selected.
Note: There is no such funcon in MMA .
Gas selecng zone
This area contains components such as gas LEDs and selecng key. Gas
includes 100% CO2, 80% Ar+20% CO2, 90% Ar+5% CO2+5% O2, 98%
Ar+2% CO2 and 100% Ar . Users can select the desired shield gas by
pressing the selecng key, and the corresponding LED will be on when a
certain kind of shield gas is selected.
Note: There is no such funcon in MMA .
Wire diameter selecng zone
This area contains components such as welding wire LEDs and selecng
key. Welding wire includes solid wire of Φ0.8, Φ1.0, Φ1.2 andΦ1.6, ux-
cored wire ofΦ1.0, Φ1.2 and Φ1.6 and Flux cored. Users can select the
desired wire by pressing the selecng key, and the corresponding LED will
be on when a certain kind of wire is selected. The ux-cored wire LED on
indicates that ux-cored wire is selected, while the LED o indicates that
solid wire is selected.
Note: There is no such funcon in MMA .
Parameter adjustment knob
This area contains the parameter control knob and adjustment indicator. All
welding parameters are set by adjusng this knob. The adjustment indicator
tells users that the knob is eecve only when the corresponding parameter LED
in the current column or voltage column ashes.

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Channel key
For the simple and eecve management of welding instrucons, the machine is equipped
with 64 channels for storage of general MIG/MAG, pulse MIG/MAG and double pulse MIG/
MAG welding modes. A channel stores a sequence of all parameters in a welding
instrucon. Take general MIG/MAG for example, a welding instrucon includes parameters
such as base metal type, gas type, wire type, operaon mode, pre-ow me, inial current, inial speed,
inial voltage, upslope me, peak current, peak speed, thickness of base metal, arc characterisc, peak
voltage, spot welding me, downslope me, crater current, crater speed, crater voltage and post-ow
me. All these parameters constute a process data channel or a channel for short. Channels are
indicated with channel numbers. The working channel means the channel being used currently.
To access the channel management mode: Press the channel key in standby mode, the channel LED will
be on, and the channel management mode can be accessed.
The machine when switched on will work in the channel last used before the machine was switched o
and this channel number will be displayed on the voltage column parameters display meter, by pressing
the channel key. At this me, users can change the working channel number by adjusng the knob.
To store and exit the channel management mode, press the channel key or any other key, the channel
LED will go o, and the channel management mode will be exited.
Aer the parameters of the working channel are modied, they will be saved into the parameter
storage automacally aer 10 seconds, and users do not need to save it manually.
Gas check key
This area contains components such as gas check key and gas ow LED. When the gas-check
key is pressed once, the gas will ow. When the key is pressed again gas ow will cease. The
gas ow LED will be on when the gas key is pressed.
Note: Users can stop gas ow by pushing the torch trigger in the gas-check state.
Control panel operaon
Aer the machine is powered on, the system will be under the funconal state that was used last me
the machine was powered o. If users want to connue the original welding task, there is no need to
make any adjustments , just connue welding as before. However, if users want to change the welding
task or welding instrucon, they should make any changes using the control panel. The recommended
operaon steps for the control panel are as below.
Select the welding mode
Select the desired welding mode by pressing the selecng key in the welding mode selecng zone if
necessary.
Select the base metal type
Select the desired base metal type by pressing the selecng key in the base metal selecng zone if
necessary.
Select the gas type

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Select the desired gas type by pressing the selecng key in the gas selecng zone if necessary.
Select the welding wire type
Select the desired welding wire type by pressing the selecng key in the wire selecng zone if necessary.
Select the operaon mode
Select the desired operaon mode by pressing the selecng key in the operaon mode selecng zone if
necessary.
Select the parameter to be viewed or modied
If necessary, select the segment, to which the parameter to be viewed belongs, by pressing the selecng
key in the welding process parameters selecng zone, and then select this parameter by pressing the se-
lecng key in the current column parameters selecng zone or voltage column parameters selecng zone,
and the current value of this parameter will be displayed on the current column or voltage column pa-
rameters display meter. Users can modify this parameter by adjusng the control knob when the corre-
sponding parameter LED ashes.

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Parameters in MMA
There are 5 adjustable parameters in MMA welding, namely arc ignion current, arc ignion me, arc current, arc
characterisc (arc force) and arc breaking voltage. These parameters can be operated only through the control
panel. Select the desired welding mode before any operaon on parameters.
Arc ignion current (I1)
It is located at “inial segment-current column-current (A)”. It indicates the current during arc ignion
period, and can be adjusted within the full range.
Arc ignion me (t1)
It is located at “inial segment-voltage column-me (s)”, and it indicates the me arc ignion period
lasts.
Arc current (I2)
It is located at “peak segment-current column-current (A)”, and users can set it according to their own
technical requirements.
Arc characterisc (arc force)
It is located at “peak segment-current column-arc characterisc (-/+)”. It determines the rising rate of
I3, and it should be set according to the electrode diameter, preset current and the technical
requirement. If the arc force is large, the molten drop can be transferred quickly, and electrode scking
seldom occurs. However, too large an arc force may lead to excessive spaer. If the arc force is small,
there will be lile spaer, and the weld bead will be shaped well. However, too small an arc force may
lead to so arc and electrode scking. Therefore, the arc force should be increased when welding with
athick electrode under low current. In general welding, the arc force may be set at 20~70.
Simple TIG welding: Set the arc characterisc (arc force) at 0 in MMA welding, and simple TIG welding can
be carried out. Simple TIG welding is a kind of DC TIG welding achieved by users in MMA welding through
adding necessary gas path equipment connected to the welding machine and igning arc by scratching
the electrode.
Arc igni- Arc burning Short-
circuit
transfer
Arc
Welding current
Welding volt-
Time
I1
I2
I3
I2
U1
U0
t1 t3
t2 t2
Standby
Welding current and welding voltage in MMA

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Arc breaking voltage (U1)
It is located at “peak segment-voltage column-voltage (V)”, and it is used for seng the arc breaking
voltage during welding. This parameter is specially designed to meet the requirement in HF intermient
welding, and its resoluon is 0.1V. The arc breaking voltage indicates the maximum allowable arc voltage
during welding, that is to say, welding can be connued when the arc voltage is lower than U1, or else
welding will stop immediately. Generally, the arc breaking voltage should be higher than 40.0V.
Parameters in standard MIG/MAG
There are 16 adjustable parameters in standard MIG/MAG welding, namely pre-ow me, inial current,
inial speed, inial voltage, upslope me, peak current, peak speed, peak voltage, thickness of base
metal, arc characterisc, spot welding me, downslope me, crater current, crater speed, crater voltage
and post-ow me. 9 of these parameters, namely peak current, peak speed, peak voltage, thickness of
base metal, arc characterisc, spot welding me, crater current, crater speed, crater voltage can be
operated either through the control panel on the power supply or through the control panel on the wire
feeder part, and other parameters can be operated only through the control panel on the power supply
part. Select the desired welding mode, base metal type, gas type, welding wire type and operaon mode
before any operaon on parameters.
1Pre-ow me
It is located at “pre segment-voltage column-me (s)”, and users can set it according to their own
technical requirements.
2Inial current
It is located at “inial segment-current column-current (A)”, and it varies with the change of the inial
speed. Therefore, it is unnecessary to set this parameter when the inial speed is set properly.
ø Operaon ps Arc ignion mode in MMA (arc force≠0)
Low current arc ignion: It can be also called li/so arc ignion. Set the arc ignion me to be a
value other than 0, and the arc ignion current (I1) to be a value lower than I2 and the machine
will enter into low current arc ignion mode. Touch the work piece with the electrode, and li the
electrode to the normal posion to weld aer arc is ignited.
High current arc ignion: It can be also called contact/hot start arc ignion. Set the arc ignion me to
be a value other than 0, and the arc ignion current (I1) to be a value not lower than I2 and the
machine will enter into high current arc ignion mode. Touch the work piece with the electrode,
and normal welding can be carried out without liing the electrode.
Initial
Current/Voltage
Time
Upslope Peak Downslope Crater
Welding current and welding voltage in general MIG/MAG

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3Inial speed
It is located at “inial segment-current column-wire feed speed (m/min)”, and it varies with the change
of the inial current. Therefore, it is unnecessary to set this parameter when the inial current is set
properly.
4Inial voltage
It is located at “inial segment-voltage column-voltage (V)”, and it varies with the change of the inial
current or inial speed. Beside, this parameter can be adjusted within a certain range.
5Upslope me
It is located at “upslope segment-voltage column-me (s)”, and it is only used in programmed 4T
mode.
6Peak current
It is located at “peak segment-current column-current (A)”. Since peak current, peak speed and
thickness of base metal are interacng parameters, if one of them varies, the other two will be changed.
Generally, users may choose one of the three to operate according to their own technical requirements or
operaon habits, leaving the other two parameters out of consideraon.
7Peak speed
It is located at “peak segment-current column-wire feed speed (m/min)”. For the relave descripon,
see the contents of peak current above for reference.
8Thickness of base metal
It is located at “peak segment-current column-thickness of base metal (mm)”. For the relave
descripon, see the contents of peak current above for reference.
9Peak voltage
It is located at “peak segment-voltage column-voltage (V)”, and it varies with the change of the peak
current and its interacng parameters. This parameter can be adjusted independently within a certain
range.
10 Arc characterisc
It is located at “peak segment-current column-arc characterisc (-/+)”, and the recommended value of
arc characterisc is 0. If the arc force is big, the arc will be hard and there will be excessive spaer. If the
arc force is small, the arc will be so and there will be lile spaer. This parameter is especially important
when welding under low current. Users may adjust it according to their own technical requirements or
operaon habits.
Spot welding me
It is located at “peak segment-voltage column-me (s)”, and it makes sense only in spot welding.