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Summary of Contents for Cebora 961
- Page 1 CEBORA S.p.A. PLASMA PROF 37 POWER SOURCE art. 961 SERVICE MANUAL 3.302.170 06/07/04...
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Page 2: Table Of Contents
....................17 - COMPONENTS LIST ..........................18 - Power source art. 961 : see file ESP961.pdf enclosed at the end of the manual......18 - Components table: see file ESP961.pdf enclosed at the end of the manual........18 - List of spare parts. -
Page 3: General Information
1.1 - Introduction. The purpose of this manual is to train personnel assigned to carry out maintenance on the power source art. 961 for plasma cutting systems. 1.2 - General service policy. It is the responsibility of the customer and/or operator to use the equipment appropriately, in... -
Page 4: System Description
The PLASMA PROF 37 is a system for cutting electrically conductive materials using the plasma arc process. It is made up of an electromechanical power source, art. 961, with built-in torch, controlled by electronic circuit to manage the operative functions of the cutting system and the operator interface. - Page 5 CEBORA S.p.A. event the torch is without nozzle or with pilot arc conductor interrupted, and the operator tries to light the pilot arc. Once contactors TLP (32) and TLM (32) are opened, solenoid valve EL1 (7) remains opened for the post-gas time (60 sec. not adjustable).
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Page 6: Maintenance
CEBORA S.p.A. 3 - MAINTENANCE WARNINGS ANY INTERNAL INSPECTIONS OR REPAIRS MUST BE CARRIED OUT BY QUALIFIED PERSONNEL. BEFORE BEGINNING MAINTENANCE OPERATIONS, UNPLUG 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. 3.2.2 - Power source operation. System shut off and unplugged from the mains. Connect the gas intake to the fitting (B) on the rear panel. Turn the gas setting knob (E) to a pressure, as read on the pressure gauge (F), suited to the type of torch being used (see Instruction Manual). -
Page 8: Troubleshooting
CEBORA S.p.A. 3.3 - Troubleshooting. WARNINGS ANY INTERNAL INSPECTIONS OR REPAIRS MUST BE CARRIED OUT BY QUALIFIED PERSONNEL. BEFORE REMOVING THE PROTECTIVE GUARDS AND ACCESSING INTERNAL PARTS, DISCONNECT THE POWER SOURCE FROM THE MAINS. NOTE Items in boldface describe problems that may occur on the machine (symptoms). - Page 9 CEBORA S.p.A. Correct? ♦ Check the wiring between switch (40) and control board (4). ♦ Check integrity of fuses on control board (4), considering that: - F1 is inserted in the supply circuits for control board (4) service transformer, contactors (32), solenoid valves (6) and (7), and fan (34).
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Page 10: The Start Button Produces No Effect
CEBORA S.p.A. 3.3.2 - The start button produces no effect. START COMMAND TEST. Control board (4), connector J6 terminals 1 and 2 = approximately 24 Vac, with start button on torch released; 0 Vac, (contact closed) with button pressed. Correct? ♦... -
Page 11: No Gas Flows From The Torch
CEBORA S.p.A. 3.3.3 - No gas flows from the torch. PILOT ARC EL1 (7) SOLENOID VALVE TEST. Solenoid valve EL1 (7) terminals = approximately 230 Vac, with torch button pressed. The solenoid valve opening time also depends on the post-gas time. -
Page 12: Gas Flows From The Torch, The Pilot Arc Does Not Light
CEBORA S.p.A. 3.3.4 - Gas flows from the torch, the pilot arc does not light. CONTACTOR TLP (32) COMMAND TEST. Contactors TLP (32) = closed (230 Vac on coil terminals), with start button pressed, for the pressure over start button lasting time, in normal conditions, or for a brief period in case of pilot arc doesn’t start. - Page 13 CEBORA S.p.A. ♦ Check the condition of the torch cable and torch, especially making sure there are no short-circuits or isolation leaks between the conductors, and that electrode, nozzle, nozzle holder and diffuser are not to be replaced. PILOT ARC FIRING SOLENOID VALVE ELT (6) TEST.
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Page 14: Irregular Pilot Arc Starts, Unstable Pilot Arc
CEBORA S.p.A. 3.3.5 - Irregular pilot arc starts, unstable pilot arc. PLASMA GAS PRESSURE TEST. Gas pressure correct in the plasma chamber of the torch. Correct? ♦ Make sure that solenoid valve EL1 (7) = opened, during the pilot arc. -
Page 15: Transfer Arc Does Not Take Place Or Is Too Weak For Cutting
CEBORA S.p.A. 3.3.6 - Transfer arc does not take place or is too weak for cutting. CONTACTOR TLM (32) COMMAND TEST. Contactor TLM (32) = closed (230 Vac on coil terminals), with start button pressed and pilot arc lit, for the pressure over start button lasting time. -
Page 16: Alarm Signals
CEBORA S.p.A. 3.4 - Alarm signals. 3.4.1 - Lamp (G) (39) lit, with fix light = transformer (38) temperature above the limit. Power source remains in block with contactors TLP (32) and TLM (32) opened. We recommend not to shut off the power source, to keep the fan (34) running and thus allow rapid cooling. -
Page 17: Lamp (G) (39) Flashing (Two Flashes With One Second Pause) = Start Button Pressed During Power Source Start-Up
CEBORA S.p.A. 3.4.3 - Lamp (G) (39) flashing (two flashes with one second pause) = start button pressed during power source start-up. If at the start up the start button on the torch is detected closed, the power source remains in block with contactors TLP (32) and TLM (32) opened, without output voltage and with lamp (G) (39) flashing. -
Page 18: Components List
CEBORA S.p.A. 4 - COMPONENTS LIST 4.1 - Power source art. 961 : see file ESP961.pdf enclosed at the end of the manual. 4.2 - Components table: see file ESP961.pdf enclosed at the end of the manual. 4.3 - List of spare parts. -
Page 19: Electrical Diagrams
CEBORA S.p.A. 5 - ELECTRICAL DIAGRAMS 5.1 - Power source art. 961 : see file SCHE961.pdf enclosed at the end of the manual. 5.2 - Waveforms. 5.2.1 - Power source output voltage, interrupted for missing pilot arc light on (par. 3.3.4). -
Page 20: Control Board (4) Code 5.602.146
CEBORA S.p.A. 5.3 - Control board (4) code 5.602.146. 5.3.1 - Topographical drawing. 5.3.2 - Connector table. Connector Terminals Function J1 – J2 230 Vac output for fan (34) power supply. 1 – 2 wired bridge for fan (34), solenoid valves and contactors power supply.