36
GB
–
noise immunity of other devices in the vicinity
–
the time of day at which the cutting work is performed.
The following is recommended to reduce possible interference radiation:
–
the plasma cutter must be regularly maintained and kept in
good condition
–
cutting cables should be completely unwound and installed
parallel on the floor, if possible
–
devices and systems at risk of interference radiation must be
removed from the cutting area if possible, or shielded.
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General plasma explanations
Plasma cutters are operated by pushing pressurised gas, e.g. air, through a small pipe. In the centre
of the pipe, there is a negatively charged electrode that is directly above the nozzle. The vortex ring
causes the plasma to rotate quickly. If you supply the negative electrode with current and make the
tip of the nozzle touch the metal, this connection creates a closed, electrical circuit. A powerful spark
occurs between the electrode and the metal. While the gas flows into the pipe, the spark heats up the
gas until it has reached the plasma condition. This reaction causes a current from the controlled plasma
with a temperature of 16,649 ºC or more that moves at speed of 6.096 m/sec and the metal transforms
into steam and molten discharge. The plasma itself conducts electrical current. The working circuit that
allows the arc to occur remains as long as current is supplied to the electrode and the plasma remains
in contact with the metal to be processed.
PLEASE NOTE:
This machine is only designed to use compressed air as “gas”.
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Before use
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Installation environment
Make sure that the working area is sufficiently ventilated. If the device is used without sufficient cooling,
the power-on time reduces and it can result in overheating.
Additional protection can be required for this purpose:
The device must be free-standing with a gap of at least 0.5 m all around.
Ventilation slots must not be blocked or covered.
The device must not be used as a storage place and tools or other items must not be placed on the
device.
It must be operated in a dry and well-ventilated working environment.
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Selecting compressed air supply
Press the selector switch for the compressed air supply
10
in order to select the compressed air source.
In INT position (Figure J) the compressed air supply is provided by the integrated compressor.
In EXT position (Figure K) by an external compressor.
When using the integrated compressor, switch the toggle switch for external compressed air
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to
the “closed” position (Figure L).
