Cebora BRAVO MIG 574 Service Manual
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Cebora BRAVO MIG 574 Service Manual

Cebora BRAVO MIG 574 Service Manual

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CEBORA S.p.A.
1
BRAVO MIG
POWER SOURCES
arts. 574 – 575 – 591 – 593
SERVICE MANUAL
3.302.155
22/01/04

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Summary of Contents for Cebora BRAVO MIG 574

  • Page 1 CEBORA S.p.A. BRAVO MIG POWER SOURCES arts. 574 – 575 – 591 – 593 SERVICE MANUAL 3.302.155 22/01/04...

  • Page 2: Table Of Contents

    CEBORA S.p.A. CONTENTS - GENERAL INFORMATION ........................3 - Introduction............................3 - General service policy.........................3 - Safety information..........................3 - Electromagnetic compatibility......................3 - SYSTEM DESCRIPTION ........................4 - Introduction............................4 - Technical specifications........................4 - Description of power sources......................4 - MAINTENANCE ...........................6...

  • Page 3: General Information

    It is forbidden to attempt to repair damaged electronic boards or modules; replace them with original Cebora spare parts. 1.3 - Safety information. The safety notes provided in this manual are an integral part of those given in the Instruction Manual.

  • Page 4: System Description

    CEBORA S.p.A. 2 - SYSTEM DESCRIPTION 2.1 - Introduction. The BRAVO MIG system is made up of equipment for welding mild steel, stainless steel and aluminum using the MIG process. Each piece of equipment essentially consists of an electric power source with built-in wire feed unit.
  • Page 5 CEBORA S.p.A. The gas solenoid (14) and the line contactor (47) are activated by the torch start button, and their condition depend on the status of the safety parts in the power source (safety switch (59) on the wire feed unit guard, and thermostat (63) on the windings of the power transformer (30)).

  • Page 6: Maintenance

    CEBORA S.p.A. 3 - MAINTENANCE WARNINGS ANY INTERNAL INSPECTIONS OR REPAIRS MUST BE CARRIED OUT BY QUALIFIED PERSONNEL. BEFORE CARRYING OUT ROUTINE MAINTENANCE, DISCONNECT THE POWER SOURCE FROM THE MAINS. 3.1 - Periodic inspection, cleaning. Periodically remove dirt and dust from the internal parts of the power source, using a jet of low-pressure dry compressed air or a brush.

  • Page 7: Power Source Operation

    CEBORA S.p.A. NOTES Operations preceded by this symbol refer to operator actions. ♦ Operations preceded by this symbol refer to machine responses that must occur following an operator action. 3.2.2 - Power source operation. System shut off and disconnected from the mains.
  • Page 8 CEBORA S.p.A. Release the start button, holding the torch in welding position. ♦ The arc shuts down immediately without the wire sticking to the workpiece, the wire stops exiting the torch, and gas flow is interrupted. Correct? NO (see 3.3.8).

  • Page 9: Troubleshooting

    CEBORA S.p.A. 3.3 - Troubleshooting. WARNINGS ANY INTERNAL INSPECTIONS OR REPAIRS MUST BE CARRIED OUT BY QUALIFIED PERSONNEL. BEFORE CARRYING OUT ROUTINE MAINTENANCE, DISCONNECT THE POWER SOURCE FROM THE MAINS. NOTES Items in boldface describe problems that may occur on the machine (symptoms).

  • Page 10: Power Source Powered, Led (B) Lit, Fan (26) Stopped

    CEBORA S.p.A. CONTROL BOARD (42) POWER SUPPLY TEST. Control board (42), connector J1, terminals 1 - 2 = approximately 28 Vac. Correct? ♦ Check the wiring between service transformer (44) and control board (42). ♦ Check the wiring between contactor (47), switches (50) or (51), voltage change terminal board (29) (where present) and service transformer (44).

  • Page 11: The Start Button Produces No Effect

    CEBORA S.p.A. 3.3.3 - The start button produces no effect. POWER SOURCE SAFETY TEST. Control panel, led (C) = lit (temperature outside limits or wire feed unit guard open). Correct? ♦ See “Alarm signals”, par. 3.4. START COMMAND TEST. Control board (42), connector J1, terminals 9 – 10 = 0 Vdc with button pressed (40 Vdc with button released).

  • Page 12: Power Source Powered, The Wire Feeder Motor Does Not Work

    CEBORA S.p.A. 3.3.5 - Power source powered, the wire feeder motor does not work. WIRE FEEDER MOTOR (5) TEST. Control board (42), connector J2, terminals 1 (+) and 2 (-) = 0 / +28 Vdc approximately adjustable using the knob (D), with start button pressed.

  • Page 13: In Open Circuit Operation, The Output Voltage Is Not Regular

    CEBORA S.p.A. 3.3.6 - In open circuit operation, the output voltage is not regular. NOTE In power sources with three-phase power supply, when the switches (50) and (51) are set to certain positions, the secondary voltage values between phases are different due to the particular connections between switches (50) and (51) and the primary circuit of the transformer (30) (see tables in the diagrams of par.
  • Page 14 CEBORA S.p.A. ♦ With the power source off and unplugged, disconnect temporarily J1 from control board (42), and check the resistance between terminals of contactor (47) coil. Correct value = approximately 4.7 ohm. If incorrect, replace contactor (47). VOLTAGE TO SECONDARY CIRCUIT OF THE TRANSFORMER (30) TEST.

  • Page 15: In Resistive Load Operation, The Output Voltage Is Not Regular

    CEBORA S.p.A. 3.3.7 - In resistive load operation, the output voltage is not regular. NOTE Only the tests loaded at the maximum output voltage are described below, and thus at the maximum current of the power source, since it is assumed that the OPEN CIRCUIT OPERATION TEST in par.

  • Page 16: When Start Button Is Released, The Wire Sticks To The Workpiece (Ineffective Motor Braking)

    CEBORA S.p.A. 3.3.8 - When start button is released, the wire sticks to the workpiece (ineffective motor braking). NOTE In the power sources covered by this manual, the electronic power source delays ceasing to generate current while the wire from the torch slows, since although it brakes after welding, the wire feeder motor still takes some time to come to a complete stop.

  • Page 17: Alarm Signals

    CEBORA S.p.A. 3.4 - Alarm signals. 3.4.1 - Led (C) lit = high temperature signal, or open wire coil cover. This alarm indicates that the temperature of the transformer (30) has risen beyond the allowed limits, or the safety cover of the wire feeder unit is open.

  • Page 18: Components List

    CEBORA S.p.A. 4 - COMPONENTS LIST 4.1 - Power sources arts. 574–575–591–593 : see file ESP5**.pdf enclosed at the end of the manual. 4.2 - Components table : see file ESP5**.pdf enclosed at the end of the manual. 4.3 - Spare parts list.

  • Page 19: Electrical Diagrams

    CEBORA S.p.A. 5 - ELECTRICAL DIAGRAMS 5.1 - Power sources arts. 574-575-591-593 : see file SCHE5**.pdf enclosed at the end of the manual. 5.2 - Waveforms. 5.2.1 - Wire feeder motor (5) voltage during correct braking (par. 3.3.8). 5.2.2 - Wire feeder motor (5) voltage during incorrect braking (par. 3.3.8).

  • Page 20: Control Board (42) Code 5.602.151

    CEBORA S.p.A. 5.3 - Control board (42) code 5.602.151. 5.3.1 - Topographical drawing. 5.3.2 - Connector table. Conn. Terminals Function. 1 - 2 28 Vac input for control board (42) power supply. 3 - 5 solenoid valve (14) command output.

This manual is also suitable for:

Bravo mig 575Bravo mig 591Bravo mig 593

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