ANDELI MIG-270E User manual

USER`S MANUAL
MIG-270E

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Read me first
Thank you for using welder! For the important safety of your body,
please read this manual book and understand its contents before
operation. Thank you for your cooperation!

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Content
1. Use and Characteristic.................................................................................... 3
2. Safty Precaution............................................................................................... 3
3. Precautions of electromagnetic compatibility...............................................6
4. Main technical information.............................................................................. 8
5. Installation......................................................................................................... 9
6. Model establishment and illustration...........................................................10
7. Brief description of the principle...................................................................11
8. Operation and instruction..............................................................................12
9. Welding machine precautions and maintenance...................................... 22

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Use and Characteristic
Inverter MIG welding machine, combines 2 functions in one – MMA and MIG .
The machine is suitable for many different materials’ welding, such as carbon steel,
stainless steel, copper, titanium, and so on. It has good static load and dynamic
characteristic, complete control function, other advantages going as below:
IGBT high frequency soft switch transform，high efficiency, compact and
portable
Advanced control system, significantly improve the welding performance,
to meet the welding process requirements to a great extent
MIG and MMA 2 in 1
Easy to arc starting, stable arc, high performance
Small spatter,stable current, high reliability, good weld-seam shaping
Safty Precaution
Generally Safety Precaution
Ensure to follow precautions specified in this manual, or else, an accident
may happen.
The design and construction of input power supply, selection of installation
site and use of high pressure gas shall be performed according to the
relevant standards and rules.
Irrelevant personnel are not allowed to enter the welding workplace. Only
the qualified personnel can install, overhaul, maintain and operate the
welding machine.
Qualified staff is needed for installation, maintenance and use.
Make sure the welding machine is not used for other purposes except
welding (such as charging, heating and pipeline unfreezing, etc).
If the ground is uneven, please avoid dumping welding machine.
Avoid electrical shock or burn

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Touching electric parts is forbidden.
Ensure to invite professional electrician to ground the welding machine with
copper conductor with specific cross section.
Ensure to invite professional electrician to connect power source in welding
machine with copper conductor with specific cross section. The insulating
sheath cannot be damaged.
Ensure to insulate the body and base metal when working in the wet and
restricted area.
Please use safety net when working at heights.
Please close the input power when not in use.
Avoid welding fume and gas damaging human body
Ensure to use specified exhaust equipment to avoid gas poisoning and
suffocation.
The protective gas will be deposited around the container bottom to cause
suffocation. Pay attention to the ventilation.
Avoid welding arc, splash and welding slag damaging human
body
Ensure to wear protective glasses with enough overshadow. The arc will
result in ocular inflammation and the welding splash and slag will burn
eyes.
Ensure to use protective supplies for welding, such as leather protective
gloves, caftan, cap, welding spats and apron to avoid welding arc light,
welding splash and slag burning skin.
Avoid fire, explosion and fracture and other accidents
The welding place cannot have the combustibles because splash and hot
weld joint will result in fire.

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The cables and base metal must be connected firmly, or else, it may be
heat to result in fire.
Must not weld in the combustible gas or container with the combustibles, or
else, it may result in explosion.
Ensure to prepare fire extinguisher just in case.
To prevent the rotating moving parts wounding
Must not make fingers, hair and clothes close to the cooling fan and wire
feed roll and other rotating parts.
When feeding wire, must not make the welding gun end close to eyes, face
and body to avoid wire damaging person.
Avoid falling gas cylinder and breaking gas regulator
The gas cylinder shall be fixed reliably, or else it may dump to result in
human injury.
Must not put gas cylinder in a place with high temperature or sunshine.
When opening gas cylinder valve, must not make face close to the gas
outlet, or else high-pressure gas may damage person.
Ensure to use gas regulator provided by the company and follow the use
regulations.
Prevent the movement of welding
Must not stand under the welding machine and motion direction when
moving welding machine with fork lift truck or crane, or else, the welding
machine may fall to cause injury.
The rope sling shall bear enough pull force and cannot be broken when
suspending. The angle between rope sling and hook shall be no more than
30°.

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Precautions of electromagnetic compatibility
1. Overview
Welding brings electromagnetic interference.
Minimize the interference emission of arc welding equipment with proper
installation way and correct application method.
The products described in the manual belong to Class A equipment (all
occasions except residential area powered by public electrical power system).
Warning: Class A equipment is not applicable to residential area powered by
public electrical power system. It is difficult to guarantee electromagnetic
compatibility because of conduction and radiated interference.
2. Advice of environment assessment
Before installing the arc welding equipment, the user shall evaluate the
potential electromagnetic disturbance of the surrounding. The considerations are
as follows:
Check surrounding of arc welding equipment for other power cables, control
cables, signals and telephone wire.
Check for broadcasting and television launching and receiving equipment;
Check for computer and other controllers;
Check for high security level equipment, such as industrial protective
equipment;
Consider the health of surrounding staffs, such as staffs with hearing aid and
cardiac pacemaker;
Check for calibrating or detection equipment;
Pay attention to immunity to interference of other equipment. The user shall
make sure that the surround equipment can be compatible. The additional
protective measures may be required;
Welding or other activity time.
The environmental range is decided based on the building structure and
possible activities. This range may exceed the boundary of building.

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3. Method of reducing radiation emission
Public power supply system
The arc welding equipment shall be connected into public power supply
system with the method recommended by the manufacturer. In case of interference,
please take addition preventive measures, such as connecting filter with public
power supply system. Ensure to consider power able shielding for fixed arc welding
equipment. The power cables can be shielded with the metal pipe or other
equivalent methods. Ensure to keep electrical continuity for shielding.
Maintenance of arc welding equipment
Ensure to perform routine maintenance for arc welding equipment according to
the method recommended by the manufacturer. When welding equipment runs, all
equipment inlets, auxiliary doors and panels shall be closed and tightened
appropriately. The arc welding equipment cannot be changed in any form, unless
the relevant change and adjustment are allowed in the manual. The spark gap of
arc initiation device and arc stabilizing device shall be adjusted and serviced
according to the suggestion of manufacturer.
Welding cable
The welding cable shall be short as much as possible and close to each other.
Moreover, welding cable shall be next to or close to ground cable.
Equipotential lap
Pay attention to lapping of metal objects in the surrounding. The lapping of
metal objects and workpiece will increase job hazard. When the operator touches
these metal objects and electrode, he may suffer from electrical shock. The
operator shall be insulated from these metal objects.
Workpiece earthing
The workpiece may be not provided with earthing because of electrical safety
or workpiece position, such as hull or building steel frame. When earthing is
available for workpiece, radiation emission may be reduced.But it is not always the
case. Therefore, we must prevent the increased risk of electric shock of users
caused by the workpiece earthing or the damage of other electric equipment. When

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necessary, some workpiece should be directly earthed, but directly grounding is not
allowed in some countries, user can achieve this effect only by selecting the
appropriate capacitor according to the regulations of the host countries.
Shielding
The shielding of surrounding equipment and other cables can reduce the
electromagnetic interference. The whole welding area can be shielded for special
applications.
Main technical information
1、Main technical parameter
Model
MIG-270E
Function
MIG
TIG
MMA
Power Supply
Voltage(V)
220V±15%
Frequency(Hz)
50/60
Rated Input Power(KW)
5
3.7
6
Rated Input Current(A)
23
17
27
Effective Current(A)
14.5
10.8
17
Welding Current
Range(A)
20-160
No-Load Voltage(V)
55V
Duty cycle （%
40℃10min）
40%
160A,22V
160A,16.4V
160A,26.4V
100%
101A,19V
101A,14V
101A,24V
Power Factor
0.93
Protection Class
IP21S
Insulation Class
F
Cooling
AIR
Net Weight(KG)
About7.5
Dimension(MM)
406*171*245

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Installation
1. Environment
Install in a dry environment with humidity less than 90% at 20℃and 50% at
40℃.
The temperature should be in the range of -10℃-40℃when welding, and
-20℃-55℃for storage and transportation.
Shelter the machine from direct sunshine and rain. Avoid raindrops.
Avoid using it in an environment with strong air flow when TIG welding.
The inclination of the welding power is less than 100the altitude no more than
1000m.
Avoid using it in a dusty, acid or other corrosive environment.
The machine should be placed more than 20cm from the wall, and more than
10cm from other welding machines.
2. Requirement of the input power source
Waveform: standard pure sine wave
Fluctuation range: 220V15%
Frequency: 50Hz/60Hz
3. Input power
Model
MIG-270E
Input power
AC220V±15%,50/60Hz
Min. power of power grid
8
Input protection
Fuse
40
Circuit
breaker
63
Cable
input
4mm2
output
25mm2
ground
4mm2

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Enlarge the input , output and grounding cable according to the cable length.
Remark: the specifications of fuse and circuit breaker in the table above are only
for reference.
4．Installation of the machine
The power supply should be single phase AC 220v/50Hz. Use a distribution
cabinet with an automatic air switch. Ensure safe grounding.
4.1 MMA welding：
Connect welding cable to the machine.
Turn off the machine.
Connect the input cable to the distribution cabinet, switch on.
4.2 MIG welding：
Connect the earth cable to the negative pole, feeder cable to the positive pole.
Connect the hose to the machine and gas bottle.
Turn off the machine.
Connect the input cable to the distribution cabinet, switch on.
Model establishment and illustration
MIG series welding machine model establishment and description as
shown in figure 1
M I G —— ×××
( Figure 1 ) MIG series welding machine model establishment and description.
Model
CO2 gas shielded
Semi-automatic
MIG/MAG

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Control Circuit
High
frequency
High frequency
transformer
Rectifier
Rectifier filter
Brief description of the principle
The schematic diagram of the MIG series welding machine is show figure 2：
（Figure 2）MIG series welding machine schematic
The welding machine adopts IGBT high frequency inverter technology, power
frequency 220V power input ，direct rectification and then sent to the inverter
composed of IGBT and other components to become high frequency alternating
current, high frequency alternating current obtained after inverter is passed through
high frequency transformer after the step-down,high frequency rectifier rectifies
and filters, the output is suitable for the DC current of the welding. Through this
process, the dynamic response of the welder is improved, the volume and weight
of the transformer and the reactor are reduced, and the efficiency of the whole
machine is improved.
The design of the control circuit enables the welder to always achieve good
welding process performance when external conditions change(such as grid
voltage fluctuations and different output cable lengths).It is easy to arc,the are is
stable,the weld is well formed,and the welding current can be continuously
adjusted.
The output characteristics of the MIG series welder are shown in Figure 3
（3a）MIG welding output characteristics （3b）MMA welding output characteristics
14
U=14+0.05I

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MIG welding output characteristics：Flat characteristics.
MMA welding output characteristics：Drooping characteristics.
Operation and instruction
1．Introduction of main function
1.1 Front panel
As shown in figure 4, control panel is used for selecting functions and setting
data of welding machine and welding output interface.
(Figure4) MIG-270E Control Panel

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1.1.1 MIG-120 Function selection and parameter setting
1Knob：
Function selection，Lift TIG、MMA、Gasless flux cored wire 0.8/1.0。
2Lift TIG：
Contact the workpiece to start arc without High frequency ，shorten the
tungsten and workpiece, lift the torch in the moment of arc starting
3MMA：
4Flux cored wire0.8/1.0：
Choose the flux cored wire 0.8-1.0.
5Power indicator light：
Send signals of power is on。
6O.C indicator light：
Send signals of machine over temperature or abnormal；
Over heat，machine is protected from over temperature ,
leave the machine unloaded ，after cooling it can work as usual；
Over current, there may be some components broken. Be causious ,restart the
machine after checking.If misjude, please just restart the machine.
7AUTO：
Synergic indicator light，syergic means current and voltage change in same

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step and match automatically；
Indicate automatically under the mode of Gasless MIG
8Voltage：
Under the mode of Gasless MIG ，fine tune the welding voltage，negative value
is decreasing，positive value is increasing。
9Plate Thickness：
Set current value under the mode of Lift TIG,MMA and Gasless MIG
1.1.3 Welding output interface
From left：
1MIG torch socket；
2Cathode output fasting socket：connect TIG torch under mode of Lift TIG；
connect workpiece under mode of MMA；

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3Anode output fasting socket，：connect workpiece under mode of Lift TIG ；
connect electrode holder under mode of MMA；connect workpiece under mode of
Gasless MIG；
Above diagram is MIG-120 output interface
From left：
1Polarity conversion joint of MIG torch: connect anode under mode of MIG ,
connect Anode under mode of Gasless MIG；
2Cathode output fasting socket：connect TIG torch under mode of Lift TIG；
connect workpiece under mode of MMA；connect workpiece under mode of MIG；
3Anode output fasting socket, connect workpiece under mode of Lift TIG ；
connect electrode holder under mode of MMA；connect workpiece under mode of
Gasless MIG；
Above diagram is MIG-160 output interface
1.1.4 Welding material table
Code
Abbreviation
Welding material
Gas
Fe CO2
FeCO
Carbon steel
CO2
Fe Ar82
FeA8
Carbon steel
Ar 82%+CO2 18%

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E308Ar98
E308
Stainless steel wire
ER308
Ar 98%+CO2 2%
E316Ar98
E316
Stainless steel wire
ER316
Ar 98%+CO2 2%
CO2，Ar，Gas ratio is for reference only.
2．Installation instruction：
Note:Please strictly follow below steps to install and debug!
Before electrical connect operation the user has to turn off the power switch of
the distribution panel!
This equipment protection level is IP21,avoid using in rain!
Connect the welding input power wire to the corresponding voltage level and
≥60A circuit breaker (connect the power wire ≥4²);
The input power wire should be in good contact with the correspond power
terminal or switch ,to prevent oxidation
Use a multimeter to measure whether the input voltage is in the fluctuation
range;
Connect the yellow-green wire on the power cable and the grounding screw on
the rear panel to ≥4² wire and ground well.；
If the welder is placed on an inclined plane, the welder should be secured so
that it does not slip；
Each welder is equipped with an insulated handle, which can be lifted by hand
when moving the welder
2.1 MMA welding
DC EP：Cathode connect with work piece（“-”），welding torch connect with
anode（“+”）。

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DC EN：Anode connect with work piece（“+”），cathode connect with TIG torch
（“-”）。
The operator can according the base metal and electrode material choose the
connection method, Generally,the alkaline electrode is recommended to use DC
reverse connection method.Acid welding electrode are not specified.
Quick check list of welding process（Only for reference）
Electrode diameter（mm）
Recommended welding
current（A）
Recommended welding
voltage（V）
1.0
20-60
20.8-22.4
1.6
44-84
21.76-23.36
2.0
60-100
22.4-24.0
2.5
80-120
23.2-24.8
3.2
108-148
23.32-24.92
4.0
140-180
24.6-27.2
Note: this table is suitable for low carbon steel welding, other materials can
refer to the relevant materials and process manual.
2.2 Gas shield welding：
Connect the gas cylinder with the CO2 gas regulator to the pipe of the wire
feeder and fasten it with buckle; When using CO2 gas, the regulator should be
connected to the heating power source to prevent the regulator from freezing
during use and affect the welding quality; No need to connect heating power
when using mixed gas
Place the wire at the right wire groove according to wire diameter. Release the
nut on the wire pressing wheel and feed the wire to the wire groove through
wire hose. Adjust the wire pressing wheel to press the wire so it doesn't slip. D
on't over-press it. Otherwise the wire would be distorted and can't be feeded n
ormally.
Connect the wire feeder polarity plug to the positive socket;Connect the earth
clamp to the negative fast socket and tighten it clockwise.
MIG torch:Feed the wire out by wire inspection,and choose the contact tip

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through the wire and tighten,press the gun switch to start.
Try to fine tuning the voltage when the current and voltage do not matched well
2.3 Flux cored wire without gas
Place the wire at the right wire groove according to wire diameter. Release the
nut on the wire pressing wheel and feed the wire to the wire groove through
wire hose. Adjust the wire pressing wheel to press the wire so it doesn't slip. D
on't over-press it. Otherwise the wire would be distorted and can't be feeded n
ormally.
Connect the wire feeder polarity plug to the negative socket;Connect the earth
clamp to the positive fast socket and tighten it clockwise.
MIG torch:Feed the wire out by wire inspection,and choose the contact tip
through the wire and tighten,press the gun switch to start.
Try to fine tuning the voltage when the current and voltage do not matched well
Welding parameters(Please refer to the following figure)
Welding current（A）
Wire（mm）
60～80
φ0.6、0.8
80～130
φ0.8、1.0
130～200
φ0.8、1.0
Formula for your reference : U=14+0.05I±3V
2.4 Lift TIG
Connect the gas pipe of TIG torch to the gas cylinder
Conenct the seperated type TIG torch to negative socket,earth clamp to
positive socket
Scratch the tungsten on the workpiece to start the arc,and then lift the tig torch
There is no control switch for gas flow and current. To avoid waste and safty
problem, please turn off the gas cylinder and keep torch away from the
workpiece.
Titanium and alloy-TIG parameter for reference

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Thin stainless steel sheet——TIG parameter (only for reference)
Thick
ness
（mm）
Groove
shape
Weldi
ng
layer
Tungsten
diameter
（mm）
Wire
diameter
（mm）
current（A）
Argon gas volume
（L/min）
Nozzle
diamete
r（mm）
0.5
1.0
1.5
2.0
2.5
I-
shape
1
1
1
1
1
1.5
2.0
2.0
2.0-3.0
2.0-3.0
1.0
1.0-2.0
1.0-2.0
1.0-2.0
2.0
30-50
40-60
60-80
80-110
110-120
8-10
8-10
10-12
12-14
12-14
6-8
6-8
8-10
10-12
10-12
14-16
14-16
14-16
16-20
16-20
10
10
10-12
12-14
12-14
3.0
4.0
5.0
6.0
7.0
8.0
Y-
shape
1-2
2
2-3
2-3
2-3
3-4
3.0
3.0-4.0
4.0
4.0
4.0
4.0
2.0-3.0
2.0-3.0
3.0
3.0-4.0
3.0-4.0
3.0-4.0
120-140
130-150
130-150
140-180
140-180
140-180
12-14
14-16
14-16
14-16
14-16
14-16
10-12
12-14
12-14
12-14
12-14
12-14
16-20
20-25
20-25
25-28
25-28
25-28
14-18
18-20
18-20
18-20
20-22
20-22
10
20
22
25
30
Double Y
shape
4-6
12
12
15-16
17-18
4.0
4.0
4.0
4.0
4.0
3.0-4.0
4.0
4.0-5.0
3.0-4.0
3.0-4.0
160-200
200-240
230-250
200-220
200-220
14-16
12-14
15-18
16-18
16-18
12-14
10-12
18-20
20-26
20-26
25-28
20
18-20
26-30
26-30
20-22
18
20
22
22
thickness
（mm）
Joint type
Tungsten
diameter
（mm）
Wire
diameter
（mm）
Current type
current（A）
Argon
gas volume
（L/min）
speed
（cm/min）
1.0
1.2
1.5
butt
butt
butt
2
2
2
1.6
1.6
1.6
DCEN
DCEN
DCEN
7-28
15
5-19
3-4
3-4
3-4
12-47
25
8-32