Forney 00317 - Operating Faults and Maintenance; Troubleshooting Common Cutting Faults; Unit Cleaning and Inspection

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MAINTENANCE
CAUTION!
Never access inside the machine (panel removal) or touch the torch (disassembly)
without having disconnected power plug.
Any inspection performed under voltage inside the machine or inside the torch may
cause severe electric shocks caused by direct contact with parts under voltage.
Maintenance can only be carried out on the unit if the person in charge of this operation has the necessary
technical knowledge and the correct tools. If this is not the case, contact your nearest service center.
OPERATING FAULTS
During cutting operations performance faults may arise which are not caused by equipment malfunctioning
but by other operational faults such as:
Insufficient penetration :
• too high cutting speed;
• torch is too tilted;
• piece is too thick;
• cutting current too low;
• torch parts are worn out;
• non-genuine Manufacturer’s parts;
Interruption of the cutting arc:
• cutting speed too slow;
• excessive distance between torch and workpiece;
• AC line too low - reduce output current;
• torch parts are worn out;
• non-genuine Manufacturer’s parts;
• work cable is disconnected;
Excessive dross:
• too slow cutting speed (bottom dross);
• too fast cutting speed (top dross);
• excessive distance between torch and workpiece;
• cutting current too low;
• torch parts are worn out;
• non-genuine Manufacturer’s parts;
Tilted cutting (not perpendicular):
• Torch position not correct;
• asymmetric wear of nozzle hole and/or wrong
assemblage of the torch parts;
Excessive wear of nozzle and electrodes:
• air pressure too low;
• exceeding system capability (material too thick);
• contaminated air (humidity-oil);
• excessive pilot arc arc ignitions in the air;
• Improperly assembled torch;
• torch tip contacting workpiece;
• damaged or loose torch head components;
• non-genuine Manufacturer’s parts.
UNIT
Keep the cutting or gouging area and the area around the machine clean and free of combustible materials.
No debris should be allowed to collect , this could obstruct air flow to the machine.
Inspect the unit every 3-4 months (depending on how often the unit is used) and use compressed air to
remove any dust deposits.
CAUTION!
Only use dry compressed air for cleaning. Do not point the jet of air at the electronic circuits.