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Parts & Service: 020 8988 7400 / E-mail: [email protected] or [email protected]
If an unusually long air hose is required, (over 8 metres), the line pressure or the
hose inside diameter may need to be increased.
NOTE:
The air hose must be rated at least 150% of the maximum
operating pressure of the air tool or other machine.
PRINCIPLES OF OPERATION
PRINCIPLES OF PLASMA CUTTING
Plasma cutting is a fast, clean and distortion free, means of cutting through all
types of metal from mild and stainless steels to aluminium, brass and copper.
•
An inert gas (compressed air) is blown at high speed out of the nozzle;
whilst at the same time an electrical arc travels through the gas, heating it
to an extremely high temperature, which ionizes the gas.
•
The column of heated ionized gas is called “Plasma” and is a good
conductor of electricity.
•
The cutting procedure utilises the plasma to transfer the electric arc to the
metal workpiece, which is melted by the heat and then blown out of the
way using the compressed air supply.
HOW THE PLASMA CUTTER WORKS
•
The process is created by an arc which is struck between the electrode
(negative polarity) and the torch nozzle (positive polarity) due to the short
circuit between these two elements.
•
When the torch is brought into direct contact with the workpiece
(connected to the positive polarity of the power source) the arc is
transferred between the electrode and the workpiece itself, thus striking a
plasma arc, also called cutting arc.
THERMAL PROTECTION DEVICE
•
This is installed at the points most subject to high temperatures such as the
power transformers and the rectifying units. An amber light on the front
panel lights up when the thermal protection device intervenes and the
machine returns to service when it cools down.
Summary of Contents for 6015700
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