Selco Genesis 90, Руководство по ремонту

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Description of operation of the power sources 9
The contents of this chapter are of vital importance and the-
refore necessary for operation of the warranties. The manu-
facturer accepts no liability if the operator fails to observe
the above precautions and instructions.
4.4 WELDER PRESENTATION
Genesis 60 and Genesis 90 are handy compact plasma cut
power sources.
Genesis 60 and Genesis 90 use compressed air only, which can
be supplied by an ordinary compressor or a suitably sized cen-
tral system; they are able to inexpensively perform good quality
cuts up to a thickness of 20 mm for Genesis 60 and 30 mm for
Genesis 90 on carbon steel while maintaining limited weight
and dimensions.
The excellent performance/weight ratio has been made possible
by use of the inverter technology, common to the whole of the
Genesis range. The current is stable and insensitive to variations
in mains voltage, in the height of the cutting arc, in the feed
speed and in the thickness of the metal to be cut. The Genesis
60 and Genesis 90 are provided with an automatic pilot arc re-
striking circuit which ensures optimal cutting of metal grille
structures.
The welder features safety systems that inhibit the power circuit
when the operator comes into contact with live parts of the
machine, and controls to reduce the wear on the electrode and
nozzle when the cutting arc is struck. The pilot arc is struck by
means of a high frequency voltage discharge which is automati-
cally disconnected once the operation has been performed,
thus limiting the emission of radio interference in the rest of the
cutting procedure.
The following are provided on the power source:
- a torch fitting
- a ground socket
- a front panel
- a rear panel.
4.4.1 Front control panel
Fig.1
*
L1 : Voltage warning light green led.
Comes on with the start switch (Fig.2) " I1 " in position " I " and
indicates that the plant is on and there is voltage.
* L2: Power output light red led.
Comes on when the arc is sparked, both during cutting and
when not cutting, and goes out as soon as the arc finishes.
* L3: torch cap alarm green led.
Means that the torch cap has not been properly tightened.
The generator has no power output.
* L4: compressed air alarm green led.
Means that the pressure of compressed air is below 3 bar, too
low for proper functioning. The generator has no power output.
*
L5 : Safety device warning light yellow led .
lndicates that the safety devices like thermal cutout.
With " L5 " on, the power source remains connected to the
supply mains, but does not supply output power.
" L5 " remains on until the fault has been removed and in any
case until the inner temperatures are not within the normal
values; in this case it is necessary to leave the power source
on to exploit the operating ventilator and reduce the time
when it is not active.
* E1: Encoder for setting the cutting current.
Allows you to continuously adjust the cutting current. This
current stays unchanged during cutting when the supply and
cutting conditions vary within the allowed ranges.
* T1 : VOLT-AMP reading selection key.
Its permits display of either the welding voltage or current on
DISPLAY “D1”.
If LED “V” is on, the last voltage reading taken during the last
cutting operation is displayed. If you do not begin cutting
within 5 sec. the system automatically switches to A, displa-
ying the set current. Vice versa if you begin cutting within 5
sec., the voltage is displayed during the entire cutting opera-
tion after which the reading remains displayed for a further 5
seconds.
If LED “A” is lit up on display D1, the set or cutting current is
displayed if the operation is in progress. The display is main-
tained for 5 seconds after the end of the operation.
* T2: gas test pushbutton.
Allows impurities to be removed from the compressed air cir-
cuit and preliminary capacity and pressure settings to be
made with no power output.
* D1 : displays the set current, cutting current and cutting vol-
tage or the letters GEN (at switch-on) and ERR (blinking in the
event of an alarm).
* D2 : displays the air pressure value for the cutting process. At
switch-on it displays the software version. In the event of an
alarm, it displays the alarm code in blinking mode:
01 IIC error
02 torch cap open
03 air pressure too low
11 thermal switch
In the event of an alarm, the operating conditions
are restored only if the cause is removed.