Adler MMA-250 Instruction Manual
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Adler MMA-250 Instruction Manual

Inverter welding machines
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Summary of Contents for Adler MMA-250

  • Page 2 PARAMETERS: MMA-200 MMA-250 Model 1 phase AC 1 phase AC Power 230V / 50Hz 230V / 50Hz Max. Power 8,3 kW 9,5 kW Consumption Welding Current Range 20-200A 20-200A Diameter of Electrodes 2÷4 2÷5 Automatic Circuit- Breaker No-load Current Voltage...
  • Page 3 Warnings: Electric Shock Danger of Welding Fumes Danger of Explosion Danger of UV Radiation Eye Protection and Face Shield is Compulsory Personal Protection is Compulsory Wearing of Protective Gloves is Compulsory Users of vital electrical and electronic apparatus must never use the machine Non-Ionizing Radiation separation of electrical and electronic appliances for refuse collection.
  • Page 4 WARNING: READ THE MANUAL CAREFULLY BEFORE USING THE WELDING MACHINE This welding machine conforms to technical product standards for exclusive use in an industrial environment and for professional purposes. 1 . GENERAL SAFETY FOR ARC WELDING The operator should be properly trained to use the welding machine safely and should be informed about the risks related to arc welding procedures, the appropriate protection measures and emergency procedures.

  • Page 5: Welding Operations

    - Always protect your eyes with proper filter, mounted on masks or use helmets. Use the relative fire-resistant clothing and welding gloves without exposing the skin to the ultraviolet and infrared rays produced by the arc; the protection must extend to other people who are near the arc by screens or nonreflective sheets. - Always isolate electrode from welded object and possible grounded metal parts nearby.

  • Page 6: General Information

    2 . GENERAL INFORMATION 2.1 INTRODUCTION - This welding machine is a power source for MMA welding and scratch strike TIG welding, made specifically for direct current (DC). The specific characteristics of this regulation system (INVERTER), i.e. high speed and precise regulation, mean the welding machine gives excellent results when welding with coated electrodes (rutile, acid, basic).
  • Page 7 4. DESCRIPTION OF WELDING MACHINE 4.1 The unit is comprised of power modules which have been developed on a specially printed circuit designed to maximize reliability and reduce maintenance. 1- Power supply input (1~), rectifier group and balancing capacitors. 2- Transistors and drivers switching bridge (IGBT). It turns the mains rectified voltage into high frequency alternate voltage and permits power regulation according to the current/ voltage of the weld to be done.
  • Page 8 5. INSTALLATION WARNING! CARRY OUT ALL INSTALLATION OPERATIONS AND ELECTRICAL CONNECTIONS WITH THE WELDING MACHINE COMPLETELY SWITCHED OFF AND DISCONNECTED FROM THE POWER SUPPLY OUTLET. THE ELECTRICAL CONNECTIONS MUST BE MADE ONLY AND EXCLUSIVELY BY AUTHORISED OR QUALIFIED PERSONNEL. 5.1 Preparation Unpack the welding machine, assemble the separate parts from the package.

  • Page 9: Connection Of The Welding Cables

    earth. - the machine can be connected to a mains outlet fitted with fuses or an automatic circuit-breaker; the special earth terminal should be connected to the earth conductor (yellow-green) of the power supply line. WARNING! Failure to observe the above rules will make the (Class 1) safety system installed by the manufacturer ineffective with consequent serious risks to persons (e.g.

  • Page 10: Maintenance

    - Holding the mask IN FRONT OF THE FACE, strike the electrode tip on the workpiece as if you were striking a match. This is the correct strike-up method. - WARNING: do not hit the electrode on the workpiece, this could damage the electrode and make strike-up difficult. - As soon as the arc is ignited, try to maintain a distance from the workpiece equal to the diameter of the electrode in use.

  • Page 11: Troubleshooting

    7.2 Maintenance of cables and clamps - Do not touch hot objects with the cable and the clamp - Periodically check leak tightness of gas connections. - Check contacts and connections of the welding cables and the clamps. - Before each operation, check the electrodes and the clamps. 8.

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