Ronch 250MIG User Manual
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Ronch 250MIG User Manual

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SERIES
250MIG
MIG

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Summary of Contents for Ronch 250MIG

  • Page 1 SERIES 250MIG...

  • Page 2: Table Of Contents

    CONTENT 1. Safety • 1.1. Signal Explanation • 1.2. Arc Welding Damage • 1.3. The knowledge of Electric and Magnetic Fields • 2. OVERVIEW • 2.1. Brief Introduction • 2.2. Working Principle • 2.3. Volt-Ampere Characteristic • 2.4. Principles of Welding •...
  • Page 3 4.2. Welding operation • 4.2.1. Voltage Setting • 4.2.2. Wire speed setting • 4.3. Welding parameters • 4.4. Operation environment • 4.5. Operation Notices • 5. MAINTENANCE & TROUBLESHOOTING • 5.1. Maintenance • 5.2. Troubleshooting • 5.3. Electrical schematic drawing •...

  • Page 4: Safety

    1. Safety • 1.1. Signal Explanation  The above signals mean warning! Notice! Running parts and getting an electric shock or thermal parts will take damage for your body or others. The corresponding notices are as follows. It is quite a safe operation after taking several necessary protection measures. •...
  • Page 5  Always be sure the work cable makes a good electrical connection with the metal being welded. The connection should be as close as possible to the area being welded. Maintain the electrode holder, work clamp, welding cable and welding machine in good, safe operating condition.
  • Page 6 SELF-PROTECTION  Keep all equipment safety guards, covers and devices in position and in good repair. Keep hands, hair, clothing and tools away from V-belts, gears, fans and all other moving parts when starting, operating or repairing equipment.  Do not put your hands near the engine fan. Do not attempt to override the governor or idler by pushing on the throttle control rods while the engine is running.

  • Page 7: The Knowledge Of Electric And Magnetic Fields

    Rotating parts may be dangerous.  Use only compressed gas cylinders containing the correct shielding gas for the process used and properly operating regulators designed for the gas and pressure used. All hoses, fittings, etc. should be suitable for the application and maintained in good condition. ...

  • Page 8: Overview

    Thus, it is characterized with portable, small size, light weight, low consumption and etc. RONCHWELD 250MIG arc welding machine uses Mix gas as shielded gas to realize gas shielded 、Ar+CO ） as shielded gas to realize MAG welding and inactive gas（...

  • Page 9: Working Principle

    • 2.2. Working Principle The working principle of RONCHWELD 250MIG arc welding machine is shown as the following figure. Single-phase 220V work frequency AC is rectified into DC（312V）, then is converted to medium frequency AC (about 40KHz) by inverter device (IGBT), after reducing voltage by medium transformer (the main transformer) and rectifying by medium frequency rectifier (fast recovery diodes), and is outputted by inductance filtering when MIG.

  • Page 10: Principles Of Welding

    • 2.4. Principles of welding...

  • Page 11: Installation & Adjustment

    3. INSTALLATION & ADJUSTMENT • 3.1. Parameters Model RONCHWELD 250MIG Parameters Input Voltage（V） 1~220/230/240±10% Input Current（A） Input Power（KW） Welding Current（A） 50-250 Welding Voltage（V） 13.5-26.5 No-load Voltage（V） 60% 250A Duty cycle（40℃） 100% 200A Fe：0.6、0.8、0.9、1.0 、1.2 Diameter(mm) Ss：0.8、0.9、1.0、1.2 Flux-cored：0.6、0.8、0.9、1.0 、1.2 Power Factor...

  • Page 12: Duty Cycle And Over-Heat

    (10 Relation of welding current and duty minutes). The rated duty cycle means the proportion of the cycle for RONCHWELD 250MIG time that a machine can work continuously within 10 minutes when it outputs the rated welding current.

  • Page 13: Maintenance Of Mig Gun Mechanism

    Operation Steps:  Connect the power source input cable of welding machine with the output port of air switch in electric box on the spot.  Connect the negative pole of welding machine to the work piece (base metal).  Connect the output pipe of gas cylinder to the input joint of gas valve on the welding machine and clamp it.

  • Page 14: The Parts List For The Mig Gun

    • 3.4.2. The parts list for the MIG GUN Description QTY. Remark Tip D.12 14-15AK Electric nozzle 0.8/M6*25 15AK Goose gun neck (Hexangular adapter and Plastic adapter) 15AK Goose gun Hexangular adapter Plastic adapter MIG blue handle Torch Switch 21.8mm Screw D.3*10 Handle locking ring Cable fixing joint 15AK...
  • Page 15 If the wire guide is too worn or totally clogged, change it to a new one according to the following instructions. Open the mounting nut of the wire guide which exposes the end of the wire guide. Straighten the welding gun’s cable and withdraw the wire guide from the gun. Push a new wire guide in to the gun.

  • Page 16: Operation

    4. OPERATION...

  • Page 17: Layout For The Front And Rear Panel

    11. MIG GUN Connect. 12. Output cathode： This polarity must connect the work piece • 4.2. Welding operation For example RONCHWELD 250MIG • 4.2.1. Voltage Setting You can use the voltage setting knob to set the output voltage before welding.

  • Page 18: Welding Parameters

    • 4.3. Welding parameters Wire speed Welding current（A） Welding volt（V） Wave control φ0.8 φ1.0 φ1.2 3--4 16～17V 4--5 3--4 17～18V 100A 5--6 3--5 2--3 17～19V 120A 6--7 4--5 3--4 17～19V 150A 18～20V 7--9 4--6 4--5 180A 20～23V 8-10 6--8 5--6 220A 21～24V 7--10...

  • Page 19: Operation Notices

    • 4.5. Operation Notices  Read §1 carefully before attempting to use this equipment.  Connect the ground wire with the machine directly and refer to §3.5.  Ensure that the input is single-phase: 50/60Hz, 220V±10%.  Before operation, no concerned people should be left. Do not watch the arc in unprotected eyes.

  • Page 20: Maintenance & Troubleshooting

    5. MAINTENANCE & TROUBLESHOOTING • 5.1. Maintenance In order to guarantee that arc welding machine works high-efficiently and in safety, it must be maintained regularly. Let customers understand the maintenance methods and means of arc welding machine more, enable customers to carry on simple examination and safeguarding by oneself, try one's best to reduce the fault rate and repair times of arc welding machine, so as to lengthen service life of arc welding machine .Maintenance items in detail are in the following table.

  • Page 21: Troubleshooting

    Observe that Whether the current output cable is damaged. If it is damaged, it should be wrapped up, insulated or changed. Using the dry compressed air to clear the inside of arc welding machine. Especially for clearing up the dusts on radiator, main voltage transformer, inductance, IGBT Monthly module, the fast recover diode and PCB, etc.
  • Page 22 After welding machine is Fan damaged Change it over-heat, the fan doesn’t The cable is loosen Screw the cable tightly work No gas in the gas cylinder Change it No output Press the Gas pipe leaks gas Change it gas when gun switch, test gas Electromagnetic valve...
  • Page 23 • 5.3. ELECTRICAL SCHEMATIC DRAWING...
  • Page 24 250MIG...

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