Techno CNC Systems WinCNC, User Manual

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CUTTING FLAME AND SPARKS CAN CAUSE EXPLOSION FIRE
• Fires and explosions can be caused by oxygen fueled cutting flame, plasma arc, hot slag and
sparks.
• A fire extinguisher should be ALWAYS readily available. When working in areas where fire
hazard may exist, always provide a fire watch.
• When the machine is not in use, or not cutting, ensure that no part of the electrode circuit is
touching the work ground. Accidental contact can cause overheating and create a fire hazard.
• Be sure there are no combustible or flammable materials near the workplace. Any material
that can’t be removed, must be protected.
• Sparks and hot slag from cutting can easily go through small cracks and openings to adjacent
areas.
• Avoid cutting near hydraulic lines.
• Do not cut or burn through tanks, drums, or containers until proper steps have been taken to
ensure that these processes will not cause flammable or toxic vapors from substances inside.
• Vent hollow castings or containers before heating or cutting. They may explode.
• Do not add fuel to engine driven equipment near an area where plasma cutting is being
conducted.
• Connect the work cable ground as close to the cutting area as possible.
• Hydrogen gas may form and be trapped under aluminum work pieces when they are cut
while using a water table. DO NOT cut aluminum alloys with the water table unless the
hydrogen gas can be eliminated. Hydrogen gas that is trapped can ignite and cause an
explosion.
• TURN OFF input power using the power disconnect at the machine as well as the switch at
the main fuse box before working on the equipment.
• Install equipment in accordance with the U.S. National Electrical Code and manufacturer’s
recommendations.
• Ground the equipment in accordance with the U.S. National Electrical Code and the
manufacturer’s recommendations.
WORKING WITH ELECTRICALLY POWERED EQUIPMENT
PLASMA ARC CAN INJURE
• Keep your body away from the plasma nozzle and plasma arc.
• Operate the pilot arc with extreme caution. The arc is capable of burning the operator and
others around.
• An EMF (Electric and Magnetic Field) is caused when an electric current flows through any
conductor. An arc ray current creates EMF fields around torch cables and cutting machine.
• EMF fields may interfere with some pacemakers. Operators with a pacemaker, or other
bioelectrical device should consult with their physician before using the plasma cutter.
• Exposure to EMF fields during cutting may have other health effects which are not known.
• Any and all operators should follow these procedures in order to minimize exposure to EMF
fields from an arc ray circuit:
• Route the torch and work cables together – Secure them with electrical tape
or zip-ties when possible.
• NEVER wrap or coil the torch and work cables around your body.
• DO NOT place your body between the torch and work cables.
• Connect the work cable to the workpiece as close as possible to the area
being cut.
• Do not work next to the cutting power source.
WHILE OPERATING THE CNC MACHINE