Instruction manual

UNI FLAME AUTOLIFT
The plasma cutting unit generates constant current and has been designed to cut
metals. The cutting process is carried out through the melting of the metal caused by
high temperature created by the electric arc between the torch electrode and the base
metal. The molten material is removed by a high-speed jet of ionized gas (compressed
air is the type of gas used).
This cutting machine is manufactured with advanced inverter technology. With high-
quality component MOSFET and PWM technology, the inverter converts DC voltage,
which is rectified from input AC voltage, to high 100KHz frequency AC voltage; as a
consequence, the voltage is transformed and rectified. This results in a small size main
transformer and light weight in the inverter plasma cutter.
EMC
Before installing the plasma cutting unit, carry out an inspection of the surrounding are,
observing the
following guidelines:
1 Make sure that there are no other power supply cables, control line, telephone
leads or other equipment near the unit.
2 Make sure that there are no radio receivers or television appliances.
3 Make sure there are no computers or other control systems.
4 Make sure that there is no-one with a pacemaker or hearing aid in the area
around the unit.
5 Check the immunity of any other equipment operating in the same environment
In certain cases additional protective measures may be required.
Interference can be reduced in the following ways:
(5a) If there is interference in the power supply line, an E.M.C filter should be inserted
between the main and the unit.
(5b) The output cables of the unit should be shortened; these should be kept close
together and stretched along the ground.
(5c) All the panels of the unit should be correctly closed after carrying out maintenance.
Our plasma cutting units are supplied with the following devices.
1 Thermal protection devices which are installed at the points most subject to high
temperatures such as the power transformers and the rectifying units. A yellow light on
the front panel lights up when the thermal protection device intervenes.
2 Electric shock protection device which prevents the operator from coming into
contact with the live parts of the torch (such as the electrode) This consists in a safety
device built into the body of the torch which breaks the main power circuit when the end
part of the torch is removed to replace the electrode or the tip.
CAUTION:
A Pneumatic protection device which prevents damage to the torch due to operation
with little or no air supply is not supplied on this machine. Therefore great care must be
taken to ensure that the machine is always used with the correct clean dry air pressure
at 4.8 bar 90/lt per min.
2. GENERAL DESCRIPTION & SAFEGUARDS