Inverter Gas Metal Arc
Welding Machine
MODELS
MIG-250TD & MIG-300TD
Operation Manual
Read this manual carefully before installing,
operating and maintaining the machine.
Страница 1: ...Inverter Gas Metal Arc Welding Machine MODELS MIG 250TD MIG 300TD Operation Manual Read this manual carefully before installing operating and maintaining the machine...
Страница 2: ...be printed in this operating 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...
Страница 3: ...s 3 Warnings 4 Packaging and Transportation 7 Parameter 8 Product Description 8 Working Principle 13 Installation and Wiring 13 Brief Procedure for Welding Operation 19 Maintenance 25 Common Machine M...
Страница 4: ...and the following safety precautions must be followed 1 The operator must have the relevant certificate before operating the equipment 2 A qualified professional should be employed to ensure that the...
Страница 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...
Страница 6: ...ell as a secure 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 th...
Страница 7: ...g machine 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 cuttin...
Страница 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...
Страница 9: ...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 Model MIG 250TD MIG 300...
Страница 10: ...ns served by a digital CPU control system delivering a precise digital output 1 2 High efficiency and duty cycle and a noiseless rectifier 1 3 A stable welding process and excellent arc self regulatio...
Страница 11: ...1 Control Panel 2 Euro Standard Torch Connector Connects the welding torch 3 Polarity conversion plug When using flux cored wires the coupling device is connected to the negative pole 1 1 2 3 1 3 1 4...
Страница 12: ...when the corresponding indicator light is lit 7 Inching Wire Feed Button Press and hold the button to feed the wire Releasing the button will stop the wire feeding 8 MMA Welding Adjustment Knob Rotat...
Страница 13: ...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 0 t1 Press torch...
Страница 14: ...ellent cutting performance Installation and Wiring 1 Location Requirements 1 1 The machine should not be installed in an area where it is exposed to direct sunlight or rain but where the humidity is a...
Страница 15: ...power supply 3 1 The connection must be carried out by a qualified electrician or technician 3 2 The connection must be in compliance with national and local regulations 3 3 Before the connection is c...
Страница 16: ...em 1 Power cord 4 Overcurrent protection device 2a Live wire L 5 GND 2b Neutral wire N 6 Earth wire terminal block 2c Earth wire 7 Electric control box 3 Terminal block Wiring of three phase AC 50 60H...
Страница 17: ...he welding machine 4 1 The cylinder must be fixed to a wall cylinder rack or support Its centre of gravity can cause the cylinder to topple resulting in injury and material damage 4 2 The cylinder mus...
Страница 18: ...ensioner roller Drive roll V groove knurled V groove roll Suited for hard wires such as carbon steel and stainless steel wire Knurled roll Suited for flux cored wires 5 3 Wire feed Pressure Selection...
Страница 19: ...ressure which will result in wire being deformed and coatings being damaged Excessive pressure will also result in faster drive roll wear 6 Installation of Wire Liner and MIG Torch In order to deliver...
Страница 20: ...cted to the welding machine is consistent with the correct power supply of the machine 1 3 Confirm that the insulation layers on all the wires and cables of the welding machine are intact and that the...
Страница 21: ...ompatible with the wire diameter 1 13 Release the wire feed pressure and direct the welding wire into the groove of the wire feeding roller through the wire guide tube into the wire guide tube of the...
Страница 22: ...ed welding mode a knurled wire feeder is required No Item No Item 1 Gas hose 5 Welding torch 2 Flowmeter 6 Work piece 3 Gas cylinder 7 Earth clamp 4 Welding power supply 8 Polarity conversion plug 3 M...
Страница 23: ...cable to the workpiece 3 6 Connect and tighten the welding cable to the positive pole Use the electrode holder to clamp the electrode 3 7 Switch on the machine and ensure the indicator light is lit a...
Страница 24: ...Voltage range V 2 0 40 65 21 6 22 6 2 5 50 90 22 0 23 6 3 2 90 130 23 6 24 2 4 0 140 180 24 6 27 2 5 0 180 220 27 2 28 8 Plate thickness mm Wire diameter mm Amperage A Voltage V Wire speed cm min Free...
Страница 25: ...10 15 4 5 1 0 1 2 150 180 21 23 30 40 10 15 20 25 Horizontal fillet butt welding T joint 1 0 0 8 0 9 70 80 17 18 50 60 10 10 15 1 2 0 9 1 0 85 90 18 19 50 60 10 10 15 1 6 1 0 1 2 100 110 19 20 50 60...
Страница 26: ...air flow in the welding environment may influence gas shielding 7 2 Difficult Arc Start or Easy Arc Break 7 2 1 Only use a good quality electrode to meet the requirements for high quality welding 7 2...
Страница 27: ...t is important to return the side cover plate after the cleaning operation Not paying attention to this detail will result in over heating of and consequent damage to the transformer and semi conducto...
Страница 28: ...or damaged Repair or replace switch Power phase down Check power supply phases and rectify No power supply from the grid Check the power grid Filter capacitor and or rectifier bridge damaged Replace f...
Страница 29: ...or on the power supply Replace the thermistor 6 When torch trigger is pressed and held wire feed is normal but no gas flow No gas output from the hose Inspect the gas hose Gas solenoid terminal contac...
Страница 30: ...rc length too long and voltage too high 9 Insufficient silicon and manganese content in welding wire 2 Incomplete penetration 1 Welding parameters unsuitable for the current job 2 Welding wire out of...
Страница 31: ...sioner roller not adequate 3 Too low welding current and fluctuation of arc voltage 4 Protruding welding wire outside the the contact tip too long 5 Surface pollution of the workpiece from rust paint...
Страница 32: ...31 4 Circuit Diagram...
