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2 SUMMARY 

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2.1 Brief Introduction 

 

This machine are general MMA arc welder which adopts the latest pulse width modulation (PWM) 

technology and the insulated gate bipolar transistor (IGBT) power module. It can change work frequency 

to medium frequency so as to replace the traditional hulking work frequency transformer with the cabinet 

medium frequency transformer. Thus, it is characterized with portable, small size, low consumption and 

etc. 

This machine have excellent performances: constant current output makes welding arc more stable; 

fast dynamic response speed reduces the impact from the arc length fluctuation to the current; accurate 

stepless  current  adjustment  and  pre-setting  function.  There  are  also  some  automatic  protection 

functions for under voltage, over current, over heat, etc. inside the welders, when the problems listed 

before occurred, the alarm on the front panel is light and at the same time the output current will be cut 

off. It can self-protect and prolong the using life and greatly improved the reliability and practicability of 

the welders. 

This  machine  can  also  realize  TIG  operation.  While  MMA  operation,  if  the  electrode  touches 

workpiece  over  two  seconds,  the  welding  current  will  drop  to  the  minimum  current  automatically  to 

protect the electrode. While TIG operation, the minimum current will be outputted firstly until the arc is 

ignited by lifting method, the output current will rise to the preset value, which can protect the electrode. 

At the same time, the arc force and hot start will be provided with MMA operation. 

 

MMA    --------- Manual Metal Arc welding 

PWM ------------ Pulse 

– Width Modulation 

IGBT ------------- Insulation Gate Bipolar Transistor 

TIG --------------- Tungsten Inert Gas welding 

 

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2.2 Working Principle 

The working principle of this machine is shown as the following figure. Single phase 220V/230V

±

10% 

work frequency ( 50/60 HZ ) AC is rectified into DC (about 300V), then is converted to medium frequency 

AC ( about 20KHz ) by inverter device ( IGBT module ), after reducing voltage by medium transformer 

(  the  main  transformer  )  and  rectified  by  medium  frequency  rectifier  (  fast  recovery  diodes),  and  is 

outputted by inductance filtering. The circuit adopts current feedback control technology to insure current 

output stably. Meanwhile, the welding current parameter can be adjusted continuously and steplessly to 

meet with the requirements of welding craft. 

 

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2.3 Volt-Ampere Characteristic 

This machine have excellent volt-ampere characteristic, seeing the following graph. In MMA welding, the 

relation between the rated loading voltage U2 and welding current I2 is as follows: 

When I2=<600A, U2=20+0.04I2 (V); when I2 > 600A, U2=44 (V) 

 

 

 

 

 

Summary of Contents for INARC 200 IDS

Page 1: ...ARC WELDING MACHINE OPERATION MANUAL INARC 200 IDS M s WARPP ENGINEERS PVT LTD B 1005 WESTERN EDGE II NEAR METRO MALL BORIVALI E MUMBAI 400 066 TEL 022 28542272 73 74 EMAIL sales warpp co in Website...

Page 2: ...OLARITY CONNECTION WAY 3 3 1 MMA 3 3 2 TIG 4 OPERATION CONTROLAND CONNECTORS 4 1 LAYOUT FOR FRONT REAR PANEL 4 2 WELDING CURRENT ADJUSTMENT 4 3 WELDING OPERATION 4 3 1 STRIKING ARC WAY 4 3 2 MANIPULAT...

Page 3: ...to a good electrical earth ground according to the operation manual The electrode and work or ground circuits are electrically hot when the welder is on Do not touch these hot parts with your bare sk...

Page 4: ...n and in good repair Keep hands hair clothing and tools away from V belts gears fans and all other moving parts when starting operating or repairing equipment Do not put your hands near the engine fan...

Page 5: ...here they may be struck or subjected to physical damage A safe distance from arc welding or cutting operations and any other source of heat sparks or flame Never allow the electrode electrode holder o...

Page 6: ...will drop to the minimum current automatically to protect the electrode While TIG operation the minimum current will be outputted firstly until the arc is ignited by lifting method the output current...

Page 7: ...cle which is defined as the proportion of the time that a machine can work continuously within a certain time 10 minutes The rated duty cycle means the proportion of the time that a machine can work c...

Page 8: ...to welding gun directly and the method of lifting arc is adopted Stricking arc of TIG operation when tungsten electrode touches the workpiece the short circuit current is only 10A After generating ar...

Page 9: ...amp This pilot lamp when lit indicates that the machine is on 2 Alarm pilot lamp This pilot lamp indicates when lit that the protection of the machine has been activated 3 Welding current regulation s...

Page 10: ...current pre setting Before welding adjusting welding current the welding current display will show the ampere It is convenient to set parameters and adjust accurately 4 3 Welding operation 4 3 1 Stri...

Page 11: ...t form in MMA In MMA welding the common basic joint form butt joint lap joint corner joint T joint 4 4 2 Electrode selection The electrode diameter selection is based on the workpiece thickness weldin...

Page 12: ...ot proper Choosing the proper welding current speed The arc cannot be drawn too long The electrode angle should be proper Manipulation of electrode should be correct Incomplete penetration The groove...

Page 13: ...ding operation is not proper The welding material can not match the work piece The groove design processing are not proper Choosing the electrode of good slag detachability Strictly to clear the slag...

Page 14: ...with any part of your body Before operation no concerned people should be left Do not watch the arc in unprotected eyes Ensure good ventilation of the machine to improve duty ratio Turn off the engin...

Page 15: ...that whether the min max value on LED accords with the set value If there is any difference and it has affected the normal welding craft please adjust it Check up that whether fan is damaged and is no...

Page 16: ...quipment If there is any problem and has no the authorized professional maintenance personal of our company please contact local our company agent or the branch company If there are some simple troubl...

Page 17: ...ool is not enough MMA The welding current adjusted too low Increase the welding current The arc force adjusted too small Increase the arc force 10 Arc blow Airflow disturbance Use the shelter from air...

Page 18: ...5 3 Electrical principle drawing INARC 200 IDS...

Page 19: ......

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