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suitable for welding. The advanced inverter technology allows for the construction of 

a  smaller  volume  and  light-weight,  stable  and  reliable  transformer  with  a  30% 

improved efficiency. 

Added  to  the  advantages  of  the  inverted  power  supply,  the  machine  has  good 

dynamic  characteristics  and  performance,  offers  a  stable  arc  and  good  quality 

welding as well as ease of control. 

Welding machines in  this  inverter  series  are suitable  for also  welding  non-ferrous 

metals, including stainless steel, alloy steel, carbon steel, copper, and aluminium. 

These machines are widely used in, amongst    others,    electric power construction,   

building  construction,  furniture  manufacturing,    hardware  and  kitchen  equipment 

production. In AC current mode, Al-alloy materials can be welded such as bicycle 

frames and indoor/outdoor decorative items.     

The inverter welding machines in this series are manufactured in accordance with 

IEC60974-1  <Arc Welding  Equipment  -  Part  1:  Welding  Power  Sources  >.  Safety 

Requirements for Arc Welding Equipment. 

1. Product Functions and Features:   

1.1. Multi-function,  digital-controlled  welding  machines  featuring    DC  TIG,  pulsed 

DC  TIG,  pulsed  AC  TIG  and MMA  welding  in one  simple  designed,  light  and 

small size unit. 

1.2. Multi-layer control circuit boards ensure high reliability and a long service life. 

1.3. The  secondary  inverter  technology  produces  a  pure  square  wave  output, 

excellent  arc-force  performance  and  a  wide  cleaning  range,  a  combination 

ensuring high quality welding results. 

1.4. Easy arc start facilitated by the high-frequency, high-voltage arc ignition circuit 

and stable, reliable arc performance. 

1.5. Pulsed  welding  with adjustable  pulse  frequency  ensuring  high-quality  welding 

on thin metal sheet, dissimilar metals, varying thickness materials and even for 

double-sided forming welds. 

1.6. Foot  control  available  to  adjust  current  freely,  improve  welding  efficiency, 

reduce welding difficulties and ensure welding quality. Increase current for rapid 

heating and decrease current to generate a weld seam. 

1.7. Overheat protection improves machine reliability. 

Summary of Contents for TIG-300PI AC/DC

Page 1: ...Digital Inverter AC DC Pulse TIG Welding Machine TIG 300PI AC DC Operation Manual Read this manual carefully before installing operating and maintaining the machine...

Page 2: ...nted in this operation manual This manual will contain as far as possible preventive and safe operation measures related to the equipment but cannot exclude the occurrence of accidents Therefore the m...

Page 3: ...s 3 Warnings 4 Packaging and Transportation 7 Parameters 8 Product Description 8 Working Principle 13 Installation and Wiring 14 Brief Procedure for Welding Operation 17 Maintenance 22 Common Machine...

Page 4: ...the following safety precautions must be followed 1 The operator must be suitably qualified and certificated before operating the equipment 2 A qualified professional should be employed to ensure that...

Page 5: ...kin damage Avoid clothes with front pockets and button up sleeves and collars 3 Use appropriate flame retardant shields or curtains to protect bystanders from arc radiation and high temperature sparks...

Page 6: ...ecure ground clamp is important 2 Insulation layers of electric wires and cables must be checked regularly for wear and replaced if necessary 3 All equipment used and clothing worn during the welding...

Page 7: ...achine Protection from Fumes and Gases During the welding or cutting process fumes can be produced which may be detrimental to health 1 The working area should be well ventilated and welding cutting a...

Page 8: ...n use If there is no hose connected to the flowmeter then cover the outlet with a dust cap Protection Against Moving and Rotating Parts Moving parts such as fans rotors and belts can be hazardous 1 En...

Page 9: ...ology producing a high power DC output Model TIG 300PI AC DC Item Value Rated input voltage 3PH AC380V 15 50 60Hz Rated input power 12 0KVA Rated input current 16 5A Rated duty cycle 60 Output current...

Page 10: ...Part 1 Welding Power Sources Safety Requirements for Arc Welding Equipment 1 Product Functions and Features 1 1 Multi function digital controlled welding machines featuring DC TIG pulsed DC TIG pulse...

Page 11: ...arance Diagram TIG 300PI AC DC Panel 1 Control panel 2 Control cable connection socket Connects the control cable of the TIG welding torch or the pedal switch 1 1 2 1 5 1 3 1 4 1 6 1 17 19 6 20 14 16...

Page 12: ...rameter values 15 Parameter selection push button In TIG mode selections can be made from the following pre flow start amps upslope peak amps duty cycle pulse frequency base amps downslope and post fl...

Page 13: ...lding wire and the weld pool to form a welding seam Also called pulse current it can be adjusted between 10A and approximately 300A 3 5 Base Amps The lower amperage for each pulse is set It not only s...

Page 14: ...is adjustable between 20 and 50 3 10 Downslope Indicates the time the welding current is stepped down to end the arc It is adjustable between 0 1 and 5s 3 11 End amps Indicate the reduced welding cur...

Page 15: ...ed in an area where it is exposed to direct sunlight or rain but where the humidity is as low as possible and the ambient temperature is within the range of 10 C 40 C 1 2 The machine should be install...

Page 16: ...st be switched off 3 4 An earth cable set must be securely connected from the machine to the work piece The machine must be earthed 3 5 Ensure that the required power supply of the machine as printed...

Page 17: ...s Warning The following safety instructions are important when connecting a gas cylinder to the welding machine 4 1 The cylinder must be fixed to a wall cylinder rack or support Its centre of gravity...

Page 18: ...the machine is freely vented and that the vents on the machine are not obstructed and no objects are lying on the machine body 2 TIG Welding Procedure 2 1 Securely connect the earth cable and the TIG...

Page 19: ...rely connect the earth cable and the electrode holder cable 3 2 Switch the power on and ensure the power light is lit and the fan is operational 3 3 Select MMA mode on the front panel and preset the w...

Page 20: ...ng Parameters Parameters are bases on the workpiece material When a workpiece with thickness 4 0mm is welded multi layer and multi pass welding is recommended Thickness mm Amperage A Diameter of tungs...

Page 21: ...6 0 1 0 4 5 1 0 40 60 1 0 1 6 0 1 6 4 7 1 5 60 90 1 0 1 6 0 1 6 6 9 2 5 80 120 1 6 2 4 1 6 2 4 6 9 3 0 100 160 1 6 2 4 1 6 2 4 7 10 4 0 130 200 2 4 1 6 2 4 10 15 5 0 150 250 2 4 3 2 2 4 3 2 10 15 6 0...

Page 22: ...e that the gas flow through the torch is unobstructed 7 1 4 Ensure that the gas is of good quality 7 1 5 Strong air flow in the welding environment may influence cover gas efficiency 7 2 Difficult Arc...

Page 23: ...nnections 1 3 Whether the power switch is operational and the fan operates smoothly when the machine is switched on 1 4 Whether cables are correctly connected insulated and in sound order 1 5 Torch co...

Page 24: ...y is within the range of 340V 420V and that all phases on a three phase system are intact 1 2 Check if the power cable as well as the earth wire is firmly connected 1 3 Check whether the wiring connec...

Page 25: ...t lit no high frequency discharge sounds when torch trigger is activated no no load output Poor contact or loose torch trigger wire Reconnect or fasten torch trigger connecting wire Damaged torch trig...

Page 26: ...transformer damaged Replace the fly back transformer Poor contact on high temperature wire terminal of main transformer Tighten terminal block Fault at control circuit Check control circuit and repla...

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