AOTAI MIG350MC, Operating Manual

Page 1: ......

Page 2: ...nstruction If you treat your product carefully this definitely helps to prolong its enduring quality and reliability things which are both essential prerequisites for getting outstanding results Production specification may change without advance notice The model you purchase is MIG350MC Please find corresponding models from the Contents Important Please take special note of safety rules and opera...

Page 3: ...rd Do not touch live electrical parts of the welding circuit electrodes and wires with your bare skin or wet clothing The operator must wear dry hole free insulating welding gloves and body protection while performs the welding Insulate yourself from work and ground using dry insulating protection which is large enough to prevent you full area of physical contact with the work or ground Connect th...

Page 4: ...attention that welding sparks and hot materials from welding can easily go through small cracks and openings to adjacent areas and start a fire Remove fire hazardous from the welding area if not possible cover them thoroughly Do not weld where flying sparks can strike flammable material and where the atmosphere may contain flammable dust gas or liquid vapors such as gasoline Protect yourself and o...

Page 5: ...ing and maintenance Reinstall doors panels covers or guards when servicing and maintenance is finished and before reconnecting input power Overuse can cause overheating Use machine follow duty cycle Reduce current or reduce duty cycle before starting to weld again Allow cooling period Do not block or filter airflow to unit Static can damage PCB Always wear wrist straps before touching PCB or parts...

Page 6: ...nded purpose only 错误 未定义书签 3 2 Machine installation rules 错误 未定义书签 3 3 Power source connection 错误 未定义书签 3 4 Welding cables instruction 错误 未定义书签 4 MIG350MC 12 4 1 System components 12 4 2 Basic equipments for welding 12 4 3 Control panel 13 4 4 Interface 15 4 5 Installation 17 4 6 welding process installation 19 4 7 Technical data 20 4 8 Dimension 21 4 9 Disassembly and reassembly 21 5 WIREFEEDER 2...

Page 7: ...e with wide range 2 step 4step Perfect functions of starting arc and reducing melting ball while stopping arc Multiple security functions Compact design installed wire feeder needle roller bearing design stable wire feeding Energy saving Polarity conversion plug socket design easy for solid wire and FCAW welding switch VRD function 1 2 Functional principle This series of power sources adopt IGBT s...

Page 8: ...e of 10 minutes that a machine can weld at rated load without overheating If overheats thermostat s will open output stops Wait for fifteen minutes for the machine to cool down Reduce amperage or duty cycle before welding NOTE Exceeding duty cycle can damage unit and void warranty Fig 1 4 1 Duty cycle ...

Page 9: ...eas The power source is designed for the following recommend areas Automobile and components supply industry Chemical plant construction Boiler and pressure vessel Shipyards Power plant construction Vehicle manufacturing Machinery industry Others 1 6 Warning label The warning label is affixed onto the top of the power source and it must not be removed or painted over Fig 1 6 1 Warning label ...

Page 10: ...rs Different models of the power sources are matched to different weldings MIG 350MC MIG350MC series is designed in accordance with the industrial standard It has constant voltage CV and constant current CC characteristics also has 3 different welding processes GMAW MIG SMAW STICK and Simple TIG ...

Page 11: ...or in such a way that it stands firmly The venting duct is very important for safety protections When choosing the machine location make sure it is possible for the cooling air to freely enter and exit through the louvers on the front and back of machine Any electro conductive metallic dust like drillings must not be allowed to get sucked into the machine 3 3 Power source connection The power sour...

Page 12: ... the ground cable and welding cable together running the wires close to the ground Correct When the excess cables are only be used by rolling up coil the cables to two windings inreverse direction and overlap them The number of turns for A is same as the number for B Handle the welding cable and ground cable according to above mentioned method Fig 3 4 1 Welding cables instruction ...

Page 13: ...g 4 1 1 System components 4 2 Basic equipments for welding Basic equipments are needed for normal welding Below are the lists MIG MAG welding Power source Ground cable MIG MAG welding torch CO2 gas regulator gas hose gas cylinder to supply the machine with shielding gas Welding wire STICK Power source Ground cable Electrode holder Electrode TIG Power source Ground cable TIG torch ...

Page 14: ...cation but the manner of working is the same Warning Operating the equipment incorrectly can cause serious injury and damage Do not use the functions described here until you have read and completely understood all content of this manual Fig 4 3 1 Control panel 1 Welding current displayer MIG When in open load the wire feeding speed relative value 0 100 is displayed during welding display the actu...

Page 15: ...ity penetration and spatter When decrease inductance there will be stiff stable arc smaller penetration and more spatter when increase inductance there will be soft arc bigger penetration less spatter Stick it is used to adjust the arc force current value TIG inactive 7 Welding voltage adjustment knob When standby it is used to preset welding voltage during welding it is used to adjust the actual ...

Page 16: ...When re press trigger then turn into crater filler standard crater filler standard is the same with welding standard preset on front panel release trigger to stop welding This mode of welding is mainly used for long welding seam Fig 4 3 6 4 step mode 4 4 Interface Fig 4 4 1 Interface 1 Euro type connector In MIG mode connect to welding torch ...

Page 17: ...version plug In TIG GTAW it is used to connect with ground cable In STICK SMAW it is used to connect with welding cable 5 Spool gun control socket 6 Circuit breaker The function of circuit breaker is to protect welding machine and operator by automatic trip to turn off power supply when overload or short circuit happens to the power source Normally the switch flipped to upward means power on To st...

Page 18: ...re than 20cm away from the wall and the distance between the welding machine is more than 10cm 5 When using water cooled welding torch pay attention to anti freezing Power supply and cable requirement Please note the size of fuse and circuit breaker in the table below are for reference only Table4 5 1 Power supply and cable requirement Note Welding machine must be taken special design if it is pow...

Page 19: ...irt 4 Screw the pressure regulator onto the gas cylinder and tighten it 5 Connect the shielding gas connector to the pressure regulator Fig 4 5 2 Gas cylinder installation Mounting the torch To ensure normal welding please make sure that the wire diameter contact tip welding torch welding wire tube are matched to each other Choose wire feeding tubes according to wires of different diameters and ma...

Page 20: ... installation Warning Operating the equipment incorrectly can cause serious injury and damage This part is about operating Do not use the functions until you have read and completely understood content of this manual MIG welding process installation Fig 4 6 1 Installation for MIG STICK welding process installation Fig 4 6 2 Installation for STICK ...

Page 21: ...ltage range V 15 40 Max open circuit voltage V 72 Rated duty cycle 60 Efficiency 89 Power factor 0 95 Wire diameter mm Ф0 8 Ф1 2 CO2 gas flow rate L min 10 25 Dimensions mm 972X443X860 Weight Kg 65 Protection degree IP21S Insulation class H Table 4 7 1 Technical data Note Please use the machine under the allowed power supply voltage range marked in the nameplate The technical data with the basic i...

Page 22: ...21 4 8 Dimension Fig 4 8 1 Dimension Table 4 8 1 Dimension 4 9 Disassembly and reassembly Fig 4 9 1 Disassemble and reassembly Item Unit mm Unit inches length 972 38 3 Width 443 17 4 Height 860 33 8 ...

Page 23: ...720021 00017 18 IGBT module 735007 00048 19 IGBT protection board 220005 00164 20 Fan 746001 00087 21 Polypropylene capacitor 722001 00070 22 Three phase rectifier 735005 00002 23 Ring 779004 00060 24 Fixed wheels 361023 00160 25 Spool shaft 342029 00001 26 Toggle switch 745003 00026 Wire test 27 Toggle switch 745003 00016 Torch selection 28 Wirefeeder 321017 00002 29 Polypropylene capacitor 72200...

Page 24: ...e feed roller Φ0 8 Φ1 0Ⅴ 327011 00003 Wire feed roller Φ1 0 Φ1 2 Ⅴ 327011 00022 Wire feed roller Φ1 2 Φ1 6Ⅴ 327011 00012 Table4 9 1 Main components list 5 WIREFEEDER Fig 5 1 Wire feeding device structure Installation of wire feed rollers The proper wire feed rolls must be chosen according to the size and material of the wire Type 1 for hard wire such as carbon steel wire stainless steel wire Type ...

Page 25: ...capacitors have been discharged Bolts in machine case also work for ground connection Never use other bolt that can not work for ground connection Power source trouble shooting Note The flowing troubles and causes are uncertain However during the process of MIG Pulse and the normal using conditions that might happen No Problem Cause Remedy 01 No display after power on 1 Power supply phase loss 2 C...

Page 26: ... the components at a certain distance only If a lot of dust has accumulated clean the cooling air ducts 04 Welding current is not adjustable 1 Wire feeder control cable is broken or controller is damaged 2 Control board is damaged 3 Current sensor in welding machine is damaged or its cable is broken 1 Replace 2 Replace 3 Replace 05 Arc is unstable large spatter 1 Improper welding standard 2 Contac...

Page 27: ...26 Daily maintenance Fig 7 1 Daily maintenance Ver 20210506 ...