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Summary of Contents for Taurus MIG-350 PLUS
- Page 1 Digital Inverter Pulsed Gas Metal Arc Welding Machine MODELS MIG-350 PLUS & MIG-500 PLUS 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 Parameters ..................... 8 Product Description ................8 Working Principle .................. 16 Installation and Wiring ................17 Brief instruction for Welding Operation ..........26 Maintenance ..................29 Common Machine Malfunctions and Solutions ........29 - 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: Parameters
Parameters Model MIG-350 MIG-500 Parameters Name Value Rated input voltage: 3PH--AC380V±10% 50/60Hz Rated input power: 15.8kVA 24.4kVA Rated input current: Rated duty cycle: Output current range: 30~350A 30~500A Output no-load voltage: Power factor: ≥0.93 ≥0.93 Efficiency: ≥85% ≥85% Wire diameter (DIRM): Φ0.8~1.6mm Φ0.8~1.6mm Gas flow:... - Page 10 welding equipment and the JB/T7824-1995 requirements for inverter arc-welding rectifiers. It also complies with the GB/T10249-1998 standards of electric welding machines. 1. Product Functions and Features: 1.1. Multiple functions combined in one machine. Digital ARM+MCU control system ensuring precise digital output. 1.2.
- Page 11 2. Appearance Diagram: MIG-350/500 Control panel for wire feeder Euro-standard torch connector: Connect the welding torch. Control panel: Welding parameter settings and display. Wire-reel snail shell: Welding wire dust prevention. Backwater outlet: Connects to the backwater outlet on the water cooler. Water outlet: Connects to the water outlet of the water cooler.
- Page 12 Power Source Control Panel Welding material selection button: Select either Steel , AlSi , AlMg , Stainless Steel , Cu. The corresponding selection light is lit. Welding process selection button: Select either MMA, GMAW , Pulse MIG , Double pulse MIG and Spot welding. The corresponding selection light is lit.
- Page 13 options: two steps (without arc closing), four steps (with arc closing), spot welding, special four step. Voltage adjustment dial: Turn the dial to adjust voltage output. Inching Wire Feed button: Press and hold the button to start wire feed, release the button to stop wire. SYN button: Indicator light is lit in SYN state.
- Page 14 Inductance display: Arc force (arc stiffness) will be displayed Voltage display: In the static condition, the preset voltage is displayed and the actual arc voltage is displayed during the welding operation. When the torch trigger is pressed without contact to the workpiece, the no-load voltage is displayed.
- Page 15 4. Welding-mode Setting There are four optional operation modes for this welding machine: 4.1. 2T Mode Press and hold the torch trigger to continue the welding operation. Release the trigger to end the operation. welding operation. 4.2. 4T Mode Press and hold the torch trigger until the arc is activated. Release the trigger and continue the welding operation according to the welding current.
- Page 16 4.4. Spot Welding Mode Press and hold the torch trigger and the spot weld will be performed according to the welding current. After the spot time has elapsed, the operation is terminated. 5. Welding-wire Selection The suggested wire type and shield gas for different workpiece materials are detailed in the following table.
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Page 17: Working Principle
Ø0.8、 Ø 1.0、 MIG/MAG Carbon steel Carbon steel 100%CO SYN welding Ø 1.2、 Ø 1.6 Working principle 1. Welding Machine Working Diagram Item Item Welding piece Gas cylinder valve Earth clamp Gas flowmeter Wire feeder Gas cylinder Inner connecting cable Flowmeter heater power cord Welding machine Signal cable... -
Page 18: Installation And Wiring
2. Diagram Explaining Working Principle 2.1. A bridge rectifier converts AC to DC; 2.2. Controlled by PWM, the IGBT inverts the DC to 20Khz AC and transmits it through a high-frequency transformer; 2.3. After secondary rectification and reactor filtering, the output current is sufficient to meet the welding requirements;... - Page 19 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 No. MIG-350 MIG-500 Parameter Name Value AC380V±10% 50Hz 3PH Input power： Min Capacity of Power Grid: 15.8kVA 24.4kVA Min Capacity of Generator:...
- Page 20 3.6. The connection screws on the terminal block must be tight ensuring a solid connection between the machine cable wires and the main power supply. 3.7. The correct wiring procedure is explained in the following diagram: Wiring of single phase AC 380V 50/60Hz welding machine Item Item Power cord...
- Page 21 4.2. The cylinder must be placed out of reach of the operator and not in contact with the work table, work-piece or the welding machine. 4.3. Position yourself beside the valve and remove the air valve cover. ① Carefully open the valve slowly. ② slightly allow the gas flow to clear the valve outlet from dust and dirt ②.
- Page 22 5. Installation and Adjustment of Wire Spool 5.1 Installation of Wire Spool Installation of 15kg（Ø300mm）wire spool locating pin locating hole Item Item Wire spool hub shaft Hub nut Wire spool Align the locating pin on the shaft① with the locating hole on the spool②, slide the spool②...
- Page 23 Item Item Hut nut Limit stop Screw fastener Wire spool hub shaft Speed limit spring 6. Wire Feeder 6.1. Composition Item Item Pressure regulating handle Drive roll Tensioner roller 6.2. Selection of Tensioner Roller and Drive Roll Non-groove U groove Non-groove Tensioner roller Drive roll...
- Page 24 6.3. Wire-feed Pressure Selection The wire-feed pressure scale is etched on the pressure-regulating handle① and prescribes the approximate pressure scale to be selected for use on different wire materials and diameters Diameter Ø1.2mm/ Pressure Ø0.8mm Ø1.0mm Ø1.6mm Drive roll V groove roll U groove roll Pressure scale Knurled roll...
- Page 25 7.1 Installation of Steel Wire Guide-tube ①Install the steel wire ②Insert the wire guide ③Set up the welding liner into the welding tube into Euro torch into Euro torch. adapter. adapter 7.2. Teflon Wire Liner Installation ①Install the Teflon wire liner into the torch ②Set up the welding ③Wire liner should be...
- Page 26 8. Installation and Adjustment of Welding Wire Prevent injuries Prevent injuries caused Wear goggles caused by wire by moving parts Take care: ！ ◆ The wire speed generated by the feeder is relatively fast and safety during the installation and adjustment process is of prime importance. Never point the welding torch nozzle to a face or other body part.
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Page 27: Brief Instruction For Welding Operation
h) In order to avoid i) Allow approximately 10 g) Reinstall the contact slipping, recheck the wire- to 15mm wire outside the tip after the wire has feeding pressure and contact tip and cut the emerged from the torch. adjust if required. excess. - Page 28 2. Welding Process When Welding Aluminium Steps Content Description Securely connect the welding torch and earth cable set to the machine. Ensure the earth clamp is connected near the welding zone. Select the suitable spool of wire and mount it over the feeder hub as explained in clause 5.1.
- Page 29 Press ① Press button ① until pulse lights up. Press ② Press button ② until AlSi lights up. Press ③ Press button ③ and select Ø1.2 . Press button ④ and when indicator 'A' lights up, turn Press ④ knob ⑤ to a current value applicable to the thickness of the workpiece.
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Page 30: Maintenance
Maintenance Safe operation of the machine is dependent on regular maintenance and, if necessary, replacement of worn or defective parts. 1. Daily Precautionary Checks 1.1. For any abnormal vibrations, sounds or odours. 1.2. For any sign of overheating on cable connections. 1.3. - Page 31 1. Inspection Before Overhaul 1.1. Check if the line voltage on the three-phase power supply 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.
- Page 32 Problem Root cause What to do Welding parameters do not Readjust parameters or Unstable arc and match or irregular operation. improve operation. excessive spatter. Badly worn contact tip. Replace contact tip. regulator CO2 regulator damaged. Replace CO2 regulator. does not heat Broken thermistor on the Replace the thermistor.
- Page 33 3. Common Welding Imperfections and Analysis Trouble Causes 1. Impure gas or insufficient gas supply. 2. Absorption of air during welding. 3. Failed preheater. 4. Poor gas shielding owing to strong wind. 5. Torch nozzle blocked by spatter. Blowhole 6. Too great a distance between nozzle and workpiece. 7.
- Page 34 Trouble Causes 1. Incorrect Process parameters. 2. Incorrect Position and alignment of welding wire. Poor weld 3. Centre deviation of wire-feed roller. formation 4. Incorrect of wire straightening mechanism. 5. Loose conductive nozzle. 1. Too high welding current. Pear-shaped 2. Too narrow groove. bead crack 3.
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