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Connect the electrode cable to the (+) terminal and the 
work clamp to the (-) terminal.  Insert the connector with 
the key lining up with the keyway and rotate 
approximately ¼ turn clockwise.  Do not over tighten. 
 
For DC(-) welding, switch the cable connections at the 
machine so that the electrode cable is connected to (-) 
and the work clamp is connected to (+). 
 

TIG Welding 

This machine does not include a TIG torch necessary for 
TIG welding, but one may be purchased separately.  
Refer to the accessories section for more information.  
Most TIG welding is done with DC(-) polarity shown 
here.  If DC(+) polarity is necessary switch the cable 
connections at the machine. 
 

 

 
Connect the torch cable to the (-) terminal of the 
machine and the work clamp to the (+) terminal.  Insert 
the connector with the key lining up with the keyway and 
rotate approximately ¼ turn clockwise.  Do not over 
tighten.  Finally, connect the gas hose to the gas 
regulator on the cylinder of gas to be used. 
 

Remote Control Connection 

Refer to the accessories section for a list of 
remote controls.  If a remote control is used, 
it will be connected to the remote connector 
on the front of the machine.  The machine 
will automatically detect the remote control, 
turn on the REMOTE LED, and switch to remote control 
mode.  More information on this mode of operation will 
be given in the next section. 
 

Features Enabled With MMA Welding 

Hot Start 

This is a temporary increase in the initial welding current.  
This helps ignite the arc quickly and reliably. 
 

Anti-Sticking 

This is a function that decreases the output current of 
the machine to a low level when the operator makes an 
error and sticks the electrode to the work piece.  This 
decrease in current allows the operator to remove the 
electrode from the electrode holder without creating 
large sparks that can damage the electrode holder. 
 

Arc Force 

This is a temporary increase in the output current during 
normal stick welding.  This temporary increase in output 
current is used to clear intermittent connections between 
the electrode and the weld puddle that occur during 
normal stick welding. 
 

Auto Adaptive Arc Force (only with Soft or Crisp 
MMA welding) 

During MMA welding is activated the function Auto 
Adaptive Arc Force that increases temporary the output 

current, used to clear intermittent connections between 
the electrode and the weld puddle that occur during stick 
welding. 
 
This is an active control feature that guarantees the best 
arrangement between the arc stability and spatter 
presence.  The feature "Auto Adaptive Arc Force" has 
instead of a fixed or manual regulation, an automatic and 
multilevel setting: its intensity depends by the output 
voltage and it is calculated in real time by the 
microprocessor where are also mapped the Arc Force 
levels.  The control measure in each instant the output 
voltage and it determines the amount of the peak of 
current to apply; that value is enough to breaks the metal 
drop that is being transferred from the electrode to the 
workpiece as to guarantee the arc stability, but not too 
high to avoid spatters around the welding puddle.  That 
means: 

 

Electrode / workpiece sticking prevention, also with 
low current values. 

 Spatters 

reduction. 

 
The welding operations are simplified and the welded 
joins looks better, also if not brushed after the welding. 
 
Refer to the section below for more details. 
 

Controls and Operational Features 

Machine Start-Up: 

When the machine is turned ON, an auto-test is 
executed; during this test all LEDs and display’s shown 
“888”; after few seconds the LEDs and display turn OFF.  
Only the Power ON/OFF LED lights up. 

 

The Machine is ready to operate when on the Front 
Control Panel lights up the Power ON LED with one 
of the four LED of the Welding mode command. 

 

Front Panel Controls 

 

Output Current Knob:  Potentiometer used to set the 
output current used during welding. 
 

 

Power ON/OFF LED:  This LED lights up when the 
machine is ON. 
 
If blinking, this LED indicates that an Input Voltage 
Overrange protection is active; the Machine restarts 
automatically when the Input Voltage returns in the 
correct range.  If the Machine does not restart 
automatically, an Internal auxiliary undervoltage 
condition may be present: the machine needs to be 
turned OFF then ON again to restart. 
 
Note: The Fan could be automatically switched OFF if 
the error condition persist for more than 2seconds. 
 

 

Remote LED:  This indicator will turn on when a remote 
control is connected to the machine via the remote 
control connector.  Using a remote control will replace 
the function of the output current control, that will be 
automatically disabled. 

Summary of Contents for INVERTEC 270SX

Page 1: ...IM2025 04 2016 REV03 INVERTEC 270SX 400SX OPERATOR S MANUAL ENGLISH Lincoln Electric Bester Sp z o o ul Jana III Sobieskiego 19A 58 263 Bielawa Poland www lincolnelectric eu ...

Page 2: ...ERTEC 270SX INVERTEC 400SX conforms to the following directives 2014 35 EU 2014 30 EU and has been designed in compliance with the following standards EN 60974 1 2012 EN 60974 10 2014 20 04 2016 Piotr Spytek Operations Director Lincoln Electric Bester Sp z o o ul Jana III Sobieskiego 19A 58 263 Bielawa Poland 12 05 ...

Page 3: ...ly to the dealer For future reference record in the table below your equipment identification information Model Name Code Serial Number can be found on the machine rating plate Model Name Code Serial number Date Where Purchased ENGLISH INDEX Safety 1 Installation and Operator Instructions 2 Electromagnetic Compatibility EMC 5 Technical Specifications 6 WEEE 6 Spare Parts 6 Electrical Schematic 6 A...

Page 4: ...MAGNETIC FIELDS MAY BE DANGEROUS Electric current flowing through any conductor creates electric and magnetic fields EMF EMF fields may interfere with some pacemakers and welders having a pacemaker shall consult their physician before operating this equipment CE COMPLIANCE This equipment complies with the European Community Directives ARTIFICIAL OPTICAL RADIATION According with the requirements in...

Page 5: ...ry when possible and do not place it on wet ground or in puddles Locate the machine away from radio controlled machinery Normal operation may adversely affect the operation of nearby radio controlled machinery which may result in injury or equipment damage Read the section on electromagnetic compatibility in this manual Do not operate in areas with an ambient temperature greater than 40 C Input Su...

Page 6: ...unction Auto Adaptive Arc Force that increases temporary the output current used to clear intermittent connections between the electrode and the weld puddle that occur during stick welding This is an active control feature that guarantees the best arrangement between the arc stability and spatter presence The feature Auto Adaptive Arc Force has instead of a fixed or manual regulation an automatic ...

Page 7: ...essing the TIG torch electrode on the work piece in order to create a low current short circuit Then the electrode is lifted from the work piece to start the TIG arc Meter The meter displays the preset welding current before welding and the actual welding current during welding Through the Pushbutton on the Display right side the Display alternatively shown the output Current A or Voltage V The LE...

Page 8: ...io and or television transmitters and receivers Computers or computer controlled equipment Safety and control equipment for industrial processes Equipment for calibration and measurement Personal medical devices like pacemakers and hearing aids Check the electromagnetic immunity for equipment operating in or near the work area The operator must be sure that all equipment in the area is compatible ...

Page 9: ...t WEEE and its implementation in accordance with national law electrical equipment that has reached the end of its life must be collected separately and returned to an environmentally compatible recycling facility As the owner of the equipment you should get information on approved collection systems from our local representative By applying this European Directive you will protect the environment...

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