AOTAI AMIG350P Operating Manual
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AOTAI AMIG350P Operating Manual

Сo2/mag /pulse mig/double puls /mma/lift tig/cac-a welding inverter
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June 29, 2025

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  • Page 2 Production specification may change without advance notice. The model you purchase is : AMIG350P & AMIG500P AMIG350PM & AMIG500PM Please find corresponding models from the "Contents". Important: Please take special note of safety rules and operate as instruction in case of damage and serious injury.
  • Page 3 Safety Rules “Danger” indicates an imminently hazardous situation which, if not avoided, will result in death or serious injury. “Warning!” indicates a possible hazardous situation which, if not avoided, could result in death or serious injury. The possible hazards are explained in the text.
  • Page 4 • 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 the primary input cable according to rules. Disconnect input power or stop machine before installing or maintenance. •...
  • Page 5 watching. • Use protective screens or barriers to protect other nearby personnel with suitable, non-flammable screening and/or warn them not to watch the arc nor expose themselves to the arc rays or to hot spatter or material. Fumes and gases can be dangerous •...
  • Page 6 before perform welding. • Remove stick electrode from electrode holder or cut off welding wire at contact tip when not in use. Apply correct fuses or circuit breakers. Do not oversize or bypass them. Cylinder can explode if damaged. • Pressure gas cylinders contain gas under high pressure. If damaged, a cylinder can explode.
  • Page 7 high. Moving parts can injure • Stay away from moving parts such as fans. • Stay away from pinch points such as drive rolls. • Keep all doors, panels, covers, and guards closed and securely in place. • Have only qualified persons remove doors, panels, covers, or guards for servicing and maintenance.

  • Page 8: Table Of Contents

    Contents 1-GENERAL REMARKS.................... 9 1-1 Power source features................9 1-2 Functional principle..................9 1-3 Output characteristics................10 1-4 Duty cycle....................10 1-5 Applications....................11 1-6 Warning label..................... 12 2-VERSIONS BRIEFS....................12 3-BEFORE COMMISSIONING................13 3-1 Utilization for intended purpose only............13 3-2 Machine installation rules.................13 3-3 Power source connection.................13 3-4 Welding cables instruction...............
  • Page 9 5-4 Structure..................... 50 5-5 Installation and operation.................52 5-6 Technical data................... 52 5-7 Dimension....................53 5-8 Disassembly and reassembly..............54 6-TROUBLE SHOOTING..................58 7-CARE AND MAINTENANCE................61...

  • Page 10: 1-General Remarks

    1-GENERAL REMARKS This series of power sources apply IGBT soft switch inverter technology. Its internal control system applies digital signal processor which ensures quick response to any change during the welding process so as to achieve precise control of welding process and ensure optimal welding results.

  • Page 11: Output Characteristics

    control circuit's closed-loop control makes the power source enjoy strong ability against power grid fluctuation and perfect welding performance. The schematic diagram is as shown in Fig. 1-2-1: Fig.1-2-1: Schematic diagram 1-3 Output characteristics Fig.1-3-1: Output characteristics 1-4 Duty cycle Duty cycle is percentage of 10 minutes that a machine can weld at rated load without overheating.

  • Page 12: Applications

    Fig.1-4-1: Duty cycle 1-5 Applications This series of machines have many welding processes and can weld most of the metal materials, including carbon steel, stainless steel, aluminum and Al-Mg alloy, copper and alloy, etc. Recommended areas of use as follows: - Automobile and car manufacture industry - Chemical structure and engineering - Boiler pressure vessel manufacture...

  • Page 13: Warning Label

    Professional welding of special materials requires special welding parameters. Different models of the power sources are matched to different weldings. ● AMIG350P/PM AMIG350P/PM apply the industrial standard design, have Double Pulse MIG, Pulse MIG ,MIG,STICK,LIFT TIG and GOUGING welding processes, the output current is 350A . ●...

  • Page 14: 3-Before Commissioning

    3-BEFORE COMMISSIONING 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 “safety rules”. 3-1 Utilization for intended purpose only The power source may only be used for pulse MIG, MIG, STICK, LIFT TIG and GOUGING(optional).

  • Page 15: Welding Cables Instruction

    - The power supply sockets that come with power source are designed to use strictly according to the marked voltages. Note!Inadequately dimensioned electrical installations can lead to serious damage. The mains lead, and its fuse protection, must be dimensioned in accordance with the local power supply.
  • Page 16 Correct When the excess cables are only be used by rolling up, coil the cables to two windings in reverse 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.

  • Page 17: 4-Amig 350/500 P/Pm

    4-AMIG 350/500 P/PM 4-1 System components AMIG350/500P/PM welding machine can be equipped with many different accessories and can be used in different special sites with different configurations. Fig. 4-1-1: System components 4-2 Basic equipment for welding Only be equipped with the necessary accessories, can the power source AMIG350/500P/PM operate well.

  • Page 18: Control Panel

    TIG welding torch with air valve switch Gas regulator, gas hose, gas cylinder (to supply the machine with shielding gas) Welding wire STICK welding Power source Ground cable Electrode holder Electrode 4-3 Control panel The functions on the control panels are all arranged in a very logical way. The various modes and parameters needed for welding are easy to select by pressing the appropriate button;...
  • Page 19 Fig. 4-3-1: Control panel (1) Adjustment knob Adjust the parameters. When the light is on, this knob can be used to adjust parameters of selected item. Reset to factory setting:Press and hold adjustment knob (1) for about 5 seconds, it comes back to factory setting.
  • Page 20 (6) Wire diameter button For selecting wire diameter. (7) Wire material selection button(s) For selecting the filler metal and shielding gas type. OP is used for upgrade. (8) MODE button(s) For selecting the operating mode of the torch. Operating mode of welding torch Graphic symbol Fig.
  • Page 21 Fig. 4-3-5: 2-step mode - 4-step mode Fig. 4-3-6: 4-step mode - Special 4-step mode (initial parameters and crater filler parameters are adjustable) Fig. 4-3-7: Special 4-step mode - Spot welding mode...
  • Page 22 Fig. 4-3-8: Spot welding mode (9) PROCESS button For select welding process(Please refer to the actual product). NOTE: AMIG 350/500P welding machine only have P-MIG and MIG welding process. (10) F2 selection button indicator When the indicator lights up, F2 works (11) “JOB”...
  • Page 23 situation, and may be up to 79V, so as to get ideal arcing characteristic. (14) Arc-length correction parameter For correcting the arc length (-5.0-+5.0) by adjustment knob (1) when indicator is on, the right display shows the arc length value when the indicator lights up. - shorter arc length 0 neutral arc length + longer arc length...

  • Page 24: Sub-Menu

    welding current & voltage are calculated as a function of the “a”-dimension parameter (21) F1 selection button indicator When the indicator lights up, F1 button works. (22) JOB program mode indicator When the indicator is on, power source is in call program mode. (23) Sub-menu parameters regulation indicator This indicator is on when in sub-menu parameters adjustment.
  • Page 25 adjustment Doublepulse speedoffset 0～2m 0.1m High pulse group duty cycle 10～90% Pulse mode OFF/UI/II/UU ―― Fan-on demand cooling time 5～15min 5min 15min 0～10s Special 2-step arc start time 0.1s 0～10s Special 2-step arc stop time 0.1s Separate adjustment mode OFF/ON ――...
  • Page 26 current and then to post current. - P08 Spot welding time Choose spot welding process and set the welding time. - P09 Digital/Analog signal selection In ON mode, welding parameters can be adjusted by welding machine control panel, digital wire feeder control panel, digital welding torch and digital remote controller; in OFF mode, welding parameters can be adjusted by analog wire feeder.
  • Page 27 Important! The base arc-length correction with low frequency pulse is controlled by the voltage adjustment knob in the control panel of wire feeder. - P13 Double pulse speed offset Set the wire feeding in double pulse, the changing arrange of wire feeding means adjusting the depth of ripple pattern.
  • Page 28 Anti-stick function OFF/ON ―― Table 4-4-2: Sub-menu parameters for STICK Hot start function Setting hot start function includes adjusting hot start current and hot start time (please refer to “Sub-menu parameters for stick” as follows) Advantages: - Improve ignition, even when using electrodes with poor ignition properties - Better fusion of the base metal in the start-up phase, meaning fewer cold crack defects - Greatly prevents slag inclusions...
  • Page 29 difficulty. ● Sub-menu parameter setting Enter and exit from the sub-menu and parameters adjustment as Fig. 4-4-3: 1. Press and hold the save key and the wire diameter selection key at the same time, the sub-menu indicator lights, and enter the sub-menu. Important! The last parameter to be selected is displayed! The first-time enter shows “P01”.

  • Page 30: Job Mode-Call& Store Function

    4-5 JOB mode-CALL& STORE function “Job Mode” enhances the quality of welding, both in semi-automatic and fully automated operation.Traditionally, technical parameters of some repeated operations need to be written down for record. In Job Mode, it is now possible to store and retrieve up to 100 different jobs.
  • Page 31 Retrieving a job You can copy a job that has already been stored in one program location to any other program location. To copy a job, proceed as described below: 1.With the “CALL” button (4), indicator is on (22)-the last job used is displayed. To view settings programmed in this job, use the “Parameter selection”...

  • Page 32: Interface

    4-6 Interface Fig. 4-6-1: interface 1. Quick socket (-) In Pulse MIG/MAG :Connect ground cable . In LIFT TIG :Connect the torch cable . In MMA : Connect ground cable . 2.Reserved socket 3.Main 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.

  • Page 33: Installation

    9.Overload protector Used for overload protection of wire feeder. 10.Wire feeder control socket For connecting with the control cable of wire feeder. PIN NO. Description Power supply for wire feeder,AC30~41V RS422 communication interface Arc voltage feedback Table. 4-6-1: Wire feeder control socket 4-7 Installation Warning! An electric shock can be fatal.
  • Page 34 Fig. 4-7-1: Installation of the system components ● Welding cable components assembly Fig. 4-7-2: Welding cable components assembly...
  • Page 35 ●Gas cylinder installation 1. Stand the gas cylinder on the trolley and secure it by fixing the cylinder strap around a point in the top third of the cylinder-but never around the neck of the cylinder. 2. Take the protective cap off the gas cylinder. 3.
  • Page 36 Fig. 4-7-4: Installation guide for Teflon wire hose For installation of steel wire feed hose Fig. 4-7-5: Installation for steel wire feed tube Note!If the wire hose is too tight or too loose, it will increase resistance for wire feeding and cause wire feeding in stable. ●...
  • Page 37 3. There should be no wind in the welding station, if any, it should be covered. 4. The welding machine is more 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. ●...

  • Page 38: Welding Process Installation

    Fig. 4-7-6: Connections of power cord and distribution box 4-8 welding process 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/P-MIG welding process installation: Fig.

  • Page 39: Technical Data

    ● STICK welding process installation: Fig. 4-8-2: Installation for STICK ● TIG welding process installation: Fig. 4-8-3: Installation for TIG 4-9 Technical data Single voltage...
  • Page 40 Model Voltage/Frequency (3~) 380/400/415/V±10％,50/60Hz Rated input capacity (KVA) 14.4 Rated input current(A) 25/23.6/22.9 46/43.7/42 Range of welding current(A) 60～350 60-500 Range of welding voltage(V) 17～31.5 17-39 OCV(V) 96~106 101~111 Duty cycle (%) Full-load efficiency(%) ≥87 Power factor ≥0.95 Wire diameter (mm) Ф0.8、Ф1.0、Ф1.2、Ф1.6 Gas flow(L/min) 15～25...

  • Page 41: Dimension

    IP class IP21S(or IP23S) Table 4-9-2: technical data of multi voltage Model Voltage/Frequency (3~) 380/525V±10％,50/60Hz Rated input capacity (KVA) 14.5 Rated input current(A) 38/27.5 Range of welding current(A) 60～350 60-500 Range of welding voltage(V) 14～40 14-50 OCV(V) 96~106 95~106 320A/30V,60%@380V 400A/34V,60%@380V Duty cycle (%) 350A/31.5V,60%@525V...

  • Page 42: Disassembly And Reassembly

    4-11 Disassembly and reassembly Fig. 4-11-1: Disassemble and reassembly...
  • Page 43 Stock No.for Stock No.for Item Remarks Left plate 262017-00632 262017-00632 Top plate 262029-00477 262029-00477 Handle 766003-02388 766003-02388 722001-00074 722001-00074 Resonance capacitor 722001-00073 722001-00074 220~440V 722001-00074 722001-00075 220629-00007 220629-00088 Main transformer 220629-00205 220629-00207 220~440V 220521-00007 220521-00004 Resonance inductor 220521-00057 220521-00055 220~440V 210580-00083 210580-00083 single row socket...

  • Page 44: 220/380/440V±10％,50/60Hz

    746001-00017 746001-00017 220/380/440V 746001-00087 746001-00087 400V CE 746001-00019 746001-00019 415V 262011-00943 262011-00943 Rear plate 769001-00289 769001-00289 Cable 769001-00028 769001-00028 400V CE Recoverable 745013-00044 745013-00044 overload protector Fan cover 766003-02403 766003-02403 Control socket 740001-00047 740001-00047 Fuse holders 740007-00004 740007-00004 Hole plug 773007-00002 773007-00002 Quick socket...
  • Page 45 Screw 779001-00051 779001-00051 Spring washer 779007-00008 779007-00008 Flat washer 779007-00019 779007-00019 Three phase rectifier 735005-00002 735005-00003 module Polypropylene 722001-00067 722001-00067 Ordinary air duct 220005-00115 220005-00135 Semi-enclosed air IGBT protection 220005-00136 220005-00136 board duct 220005-00102 220005-00135 220~440V IGBT module 735007-00038 735007-00038 Input filter inductance 220479-00002 220479-00002...

  • Page 46: 5-Wf-P Wirefeeder

    5-WF-P WIREFEEDER WF-P WireFeeder series is a wire feeding device designed for AMIG-***P/PM welding machine. The wire feeding device has the characteristics of large torque, small size, light weight, easy operation, etc. The structure of the device is convenient for wire installation and adjustment.

  • Page 47: Interface

    5-2 Interface Fig. 5-2-1: Wire feeder interface 1.Control panel 2.Torch connector For air-cooled or water-cooled European type. 3. Water outlet For connecting water inlet of water cooled torch (blue). 4.Water inlet For connecting water outlet of water cooled torch (red). 5.Special control socket For automation or remote controller connection.
  • Page 48 14, 15 External urgent stop signal 19, 20 AC current 31V Table 5-2-1: Digital communication socket 6.Control socket for digital welding torch For connecting the control plug of digital torch. Description Welding torch switching signal Welding torch right-hand button signal Welding torch bottom button signal Welding torch left-hand button signal Welding torch upper button signal...

  • Page 49: Control Panel

    For connecting with the output terminal (+) of power source via welding cable 10.Overload protector Used for overload protection of wire feeder. 11.Water inlet For connecting water inlet of water cooling machine(blue). 12.Water outlet For connecting water outlet of water cooling machine(red). 5-3 Control panel There are two options for the control panel: digital and analog.
  • Page 50 Fig.5-3-3: Control panel 1. JOB No. Indicator For retrieving parameter records/job numbers that were previously saved with the “Store” button. 2. Welding speed indicator When the light is on, the welding speed (cm/min) is on the right display. 3. Welding voltage indicator When the light is on, the preset or actual welding voltage is on the right display.

  • Page 51: Structure

    7. Wire feeding speed indicator When the indicator lights up, the left display shows the wire feeding speed (M/min). 8. Welding current indicator When the indicator lights up, the left display shows the preset or actual welding current values. 9. Sheet thickness indicator When the indicator lights up, the left display shows the preset sheet thickness.
  • Page 52 Fig. 5-4-1: Wire feeder 1.INCHING button Press the button to launch the manual wire feeding, wire feed motor works and start feeding wire. Turn current adjustment knob to adjust the wire feed speed. Release the button and manual wire feeding will stop. 2.GAS TEST button 3.wirefeeder motor 4.The electromagnetic valve...

  • Page 53: Installation And Operation

    5-5 Installation and operation ●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 2: for soft wire, such as Aluminum and Aluminum alloys, also for copper and copper alloy wire.

  • Page 54: Dimension

    Wire diameter(mm) Ф0.8,Ф1.0,Ф1.2,Ф1.6 Spindle diameter(mm) Gas flow(L/min) 10~25 Dimension(mm 686×284×406 Weight (Kg) Table. 5-6-1: Technical data 5-7 Dimension Fig. 5-7-1: dimension Item Unit(mm) Unit(inches) length Width Height Table. 5-7-1: Dimension...

  • Page 55: Disassembly And Reassembly

    5-8 Disassembly and reassembly 5-8-1. Wirefeeder Fig. 5-8-1: Wirefeeder Item Stock No. Remarks Plastic front panel 764006-00108 European style copper interface 322017-00014 Water inlet socket 740002-00022 Blue Water outlet socket 740002-00020 Aerial socket 740001-00045 Aerial socket 740001-00046...
  • Page 56 Knob 720031-00144 262035-00330 Control panel Control panel PC 771001-01351 single row 220503-00003 socket Dual row Display board 220503-00220 socket 220503-00342 Push-pull Front panel Main control board bracket 766002-01194 single row 210580-00015 socket Dual row Main control board 210580-00931 socket 210580-01386 Push-pull Left panel 321017-00003...
  • Page 57 Quick socket 740002-00028 Bottom plate Real Nameplate 771002-02811 Right panel Table. 5-8-1: Wirefeeder spare parts list 5-8-2 Wirefeeder Fig. 5-8-2: Wirefeeder Item Stock No. Remarks Cover 780999-01983 Wire feed axle screw 328005-00053...
  • Page 58 Wire feed wheel washer 776020-00018 327011-00001 Φ0.8-Φ1.0 U 327011-00005 Φ1.0-Φ1.2 U 327011-00033 φ1.2-φ1.6 U Wire feed wheel 327011-00003 Φ0.8-Φ1.0Ⅴ 327011-00022 Φ1.0-Φ1.2 Ⅴ 327011-00012 Φ1.2-Φ1.6Ⅴ Passive gear 321005-00004 326005-00014 Aluminum body Wire feed axle 328005-00045 Intermediate wire feed tube 324017-00010 324017-00011 Wire guide tube 324017-00017 Special for AL...

  • Page 59: 6-Trouble Shooting

    6-TROUBLE SHOOTING Warning! An electric shock can be fatal. Before doing any work on the machine: -Switch it off and unplug it from the mains -Put up a clearly legible and easy-to-understand warning sign to stop anybody inadvertently switching it on again -Check to make sure the electrically charged components (e.g.capacitors) have been discharged.
  • Page 60 Board is damaged Control Board Shut down the welding The welding machine is machine and wait for Over-heat protection over heat; or Temperature cooling; or replace Relay fault Temperature Relay Wire feeding is The current of Wire Feeder Check and repair wire abnormal Motor is too high feeder...
  • Page 61 • Check the fuse and breaker • Check whether the junction cable and connectors between power source and wire feeder are correctly fixed. • Check whether the ground cable is connected • Check whether shielding gas is provided Dirty welding face, •...

  • Page 62: 7-Care And Maintenance

    7-CARE AND MAINTENANCE Before open the machine  Warning! An electric shock can be fatal. Before doing any work on the machine: -Switch it off and unplug it from the mains -Put up a clearly legible and easy-to-understand warning sign to stop anybody inadvertently switching it on again.
  • Page 63 Fig. 7-1: Daily maintenance Ver20210828...

This manual is also suitable for:

Amig500pAmig350pmAmig500pm

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