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Summary of Contents for Taurus MIG-350I
- Page 1 Inverter Gas Metal Arc Welding Machine MODELS MIG-350I & MIG-500I Operation Manual Read this manual carefully before installing, operating and maintaining the machine.
- Page 2 Description: This machine is designed and built to weld ferrous and non-ferrous metals. Disclaimer: The information, illustrations and instructions described in this manual are based on the latest product information available at the time of publication. The manufacturer and distributors reserve the right to modify the contents of this manual at any time.
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Page 3: Table Of Contents
CONTENTS Safety Precautions ................3 Warnings ..................4 Packaging and Transportation ..............7 Parameter ....................8 Product Description ................8 Working Principle .................. 12 Installation and Wiring ................13 Brief Procedure for Welding Operation ..........17 Maintenance ..................21 Common Machine Malfunctions and Solutions ........22 - 2 -... -
Page 4: Safety Precautions
Safety Precautions The equipment is designed for use by qualified personnel who have completed professional training and have obtained a qualification certificate as a welder. The operator shall have sufficient professional knowledge of welding, cutting and circuitry. The machine should be operated only after having read and fully understood all the safety precautions and warnings contained in this manual and those generally applicable to welding operations. -
Page 5: Warnings
Warnings Welding and cutting operations are specialised operations which present a certain degree of risk. Professional training, correct operating procedures and protective measures reduce the accident risk and damage to equipment. Personal Safety Protection Welding and cutting operations generate noise, bright light and high-temperature sparks which will cause harm to human hearing, eyes and skin unless personal protective measures are implemented and proper operational instructions are adhered to. - Page 6 Welding and cutting on sealed gas tanks will cause explosions. These operations are prohibited. Welding and cutting areas must be provided with adequate fire extinguishing equipment. Regular testing for efficiency of this equipment is compulsory as is training of staff in the use of the equipment. Once the welding/cutting operation is completed, check for any high temperature spark or metal which might cause a fire and immediately dispose of it.
- Page 7 However, it would be wise to limit exposure to EMF as far as possible and the following procedures are suggested: Welders and cutters with cardiac pacemaker implants should obtain medical advice on the effects of EMF on the implant. Welders should minimise the possibility of electromagnetic field damage through the following methods.
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Page 8: Packaging And Transportation
Gas cylinders should be kept away from extreme temperatures and fire sources. Scratching on cylinder walls with hard objects should be avoided. A flowmeter should be installed on the gas cylinder in use in accordance with the manufacturer's operating instructions. Quick-coupling connectors must not be used and gas hose fitting should be tested for leaks. -
Page 9: Parameter
Parameters Model MIG-350I MIG-500I Item Value Rated input voltage: 3PH AC380V±15% 50/60Hz Rated input power: 15KVA 25KVA Rated input current: 22.8A 38.5A Rated duty cycle: Output current range: 60A-350A 60A-500A Open circuit voltage: Efficiency: ≥85% Wire diameter (mm): Ф0.8～Ф1.2 Ф0.8～Ф1.6 2 ～... - Page 10 machine has good dynamic characteristics, and offers a stable arc, good welding quality and ease of control. This semi-automatic, high-performance machine is designed for CO2 and mixed-gas welding on low-carbon steel, low-alloy steel, stainless steel, galvanized sheet and copper. Steel and stainless steel wire as well as other solid wires with diameter Φ0.8 - Φ1.6mm can be used.
- Page 11 2. Appearance Diagram: MIG-350I/500I Panel： Welding mode button: Selects between MIG and MAG and operates when the corresponding light is lit. Inching wire feeding button: Button pressed starts wire feed. Button pressed again stops wire feed. Crater current adjustment: Rotate the knob to adjust the crater current.
- Page 12 Terminal sockets - positive pole (+) and negative pole (-): In MMA mode the electrode holder cable is connected to the positive terminal and the earth cable is connected to the negative terminal and should be reversed when using scratch start DC TIG in MMA mode. In MIG mode the polarity cable is connected to the positive terminal and the earth cable is connected to the negative terminal for all MIG welding applications, except for gasless flux-core welding where the polarity...
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Page 13: Working Principle
t3~t4: Trigger released. Wire feeding stops and current drops to zero. Post-flow gas will continue for a short period. Note: the gas pre-flow and post-flow not adjustable in T2 mode. 3.2. 4T Mode This setting applies for longer-spell welds and the responding current curve is depicted below. -
Page 14: Installation And Wiring
10cm at each side. 2. Power input requirements The power supply waveform should be the standard sin wave, the rated voltage 380V±10% 50/60Hz. Three phase voltage unbalance should be ≤ 5 Model MIG-350I MIG-500I Parameters Value Power supply： 3PH-AC380V±15% 50/60Hz Rated input current: 22.8A... - Page 15 3. Main Power Supply Connection Pay attention to prevent electric shock Wear goggles Take note of the following when the machine is connected to the main power supply: 3.1. The connection must be carried out by a qualified electrician or technician. 3.2.
- Page 16 Item Item Power cord Terminal block Live wire L1 Overcurrent protection device Live wire L2 Live wire L3 Earth wire terminal block Earth wire Electric control box 4. Gas-cylinder Connection Prevent gas Explosion hazard Wear goggles inhalation Warning: The following safety instructions are important when connecting a gas cylinder to the welding machine.
- Page 17 5. Wirefeeder 5.1. Selection of Tension Roller and Drive Roll Non-groove Non-groove Tensioner roller Drive roll V groove knurled Suited for hard wires such as solid carbon steel V groove roll and stainless-steel wires. Knurled roll Suited for flux-cored wires. 5.2.
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Page 18: Brief Procedure For Welding Operation
6. Installation of Wire Liner and MIG Torch In order to deliver a smooth and successful welding job, it is important to confirm that the wire liner and contact tip is compatible with the welding torch and that the wire liner is suitable for the diameter and type of wire to be used. 7. - Page 19 1.7. Connect and tighten the wire feeder control cable to the aviation socket. 1.8. Connect the wire-feeder gas hose to the flowmeter. If the flowmeter has a heating power cable, then connect it to the heating power supply socket on the rear of the machine. 1.9.
- Page 20 2.3. Confirm that the insulation layers on all the wires and cables of the welding machine are intact and that the cable set is secure and correctly connected to the machine. 2.4. Confirm the machine is freely vented and that the vents on the machine are not obstructed and no objects are lying on the machine body.
- Page 21 4. Suggested Settings for MMA Welding Electrode diameter Welding current range Welding Voltage range （mm） （A） （V） Φ2.5 50~90 22.0~23.6 Φ3.2 90~130 23.6~24.2 Φ4.0 140~210 24.4~25.2 Φ5.0 200~260 26.4~28.4 Φ6.0 260-300 28.0~30.8 5. Possible Welding Deficiencies The following deficiencies are related to situations outside the electronic circuits and are mostly attributed to accessories, gas and power supply and external circumstances.
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Page 22: Maintenance
5.2.3. Extended welding cables can cause excessive voltage drop at the torch end resulting in arc problems. 5.3. The Output Current is Below the Rated Value Power supply which deviates from the rated voltage, will have a consequential effect on the output current. Under-power input will result in under-power output. Maintenance Safe operation of the machine is dependent on regular maintenance and the replacement of worn and defective parts where necessary. -
Page 23: Common Machine Malfunctions And Solutions
Common Machine Malfunctions and Solutions Warning：Machine maintenance and repair must be carried out by qualified technicians. The operating voltage in the machine can be up to 600V and it is important that power be cut at the machine and at the control box before covers are removed and repairs carried out. - Page 24 Problem Root Cause What to do Replace wire feeder Control cable of wire feeder or control cable or the the controller is broken. controller. Welding current Machine control board Replace the control cannot be damaged. board. adjusted. The wire at both ends of the Reconnect the broken diverter insider the welder is wire.
- Page 25 Problem Root Cause What to do When torch Torch trigger damaged. Replace the torch. trigger is Repair the wire Broken wire feeding control. pressed and feeding control cable. held, wire feeder fails and there is Replace the control no indication of Damaged control circuit board.
- Page 26 1. Low welding current and uneven wire-feed speed. 2. Arc voltage too low or too high. 3. Inside the beveled edge the welding speed is too Incomplete slow or too fast. penetration 4. Beveled gap too small. Welding wire out of position and not aligned with the centre of the welding bead.
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