7-
Technical specifications for main power supply:
- It is off, with the torch button enabled, under the following
conditions:
-U
:Alternating voltage and frequency of power supply to the
1
- During the POST AIR phase.
machine (allowed limits ±10%):
- If the pilot arc is not transferred to the piece within a maximum of
- I
:Maximum current absorbed by the line.
1 max
2 seconds.
- I
: Effective current supplied
1eff
If the cutting arc is interrupted because the torch and piece are
8-
Performance of cutting circuit:
too far apart, if there is excessive electrode wear or if the torch is
-
U
: maximum no-load voltage (open cutting circuit).
0
taken away from the piece by force.
-
I /U
:Current and corresponding normalized voltage that the
2
2
- If a SAFEGUARD system has triggered.
machine is able to supply during cutting.
4- Green LED indicating presence of mains power supply and that
- X
:Duty cycle: indicates the time for which the machine is
auxiliary circuits are powered.
able to supply the corresponding current (same column). It
The control and service circuits are powered.
is expressed in %, based on a 10 min. cycle (e.g. 60% = 6
5- Red LED indicating compressed air circuit (where present).
minutes work, 4 minutes pause; and so on).
When this is lit it indicates overheating in the electric motor windings
If the usage factors (on the plate, referring to a 40°C
on the air compressor.
environment) are exceeded the thermal cutout will trigger
6- Pressure gauge.
(the machine will remain in standby until its temperature
Used to read the air pressure.
returns within the allowed limits).
7- Torch connection connector.
-A/V-A/V
: indicates the range over which the cutting current may be
Torch with direct or centralised connection.
adjusted (minimum - maximum) at the corresponding arc
- The torch button is the only control device that can be used to
voltage.
control the start and end of cutting operations.
9-
Machine serial number (indispensable identification when asking for
- When the button is released the cycle is instantly interrupted at any
technical assistance, ordering spare parts or discovering the origin of
stage, while cooling air (post air) continues.
the product).
- Accidental operation: the cycle will only start if the button is
10-
:
Size of delayed action fuses to be provided to protect the
pressed and kept down for a minimum of some tenths of a second.
power line.
- Electrical safeguard: button operation is disabled if the insulating
11-
Symbols referring to safety standards, the meaning of which is
nozzle holder has NOT been mounted on the head of the torch, or
explained in chapter 1 "General safety instructions for plasma arc
if it has been mounted incorrectly.
cutting”.
8- Earth cable connector
Front panel (Fig. D2)
Note: The data plate shown here is an example for explaining the
1- Cutting current adjustment knob.
meaning of the symbols and figures; the exact values of the technical
Used to set the cutting current intensity supplied by the machine, to
specifications for your plasma cutting system must be read directly on the
be chosen according to the application (material thickness / speed).
rating plate of the machine itself.
See the TECHNICAL INFORMATION for the correct duty cycle-
pause to be chosen, depending on the selected current.
OTHER TECHNICAL INFORMATION:
2- Red LED indicating general alarm event:
- POWER SOURCE: see table 1 (TAB.1)
- When this comes on it indicates overheating of a component in the
- TORCH: see table 2 (TAB.2)
power circuit, or an incorrect input power supply voltage (over- or
The weight of the machine is given in table 1 (TAB. 1).
under-voltage). Mains over- or under-voltage safeguard: stops the
machine: the power supply voltage is outside the +/- 15% range
4. DESCRIPTION OF THE PLASMA CUTTING SYSTEM
based on the rating plate value. WARNING: Exceeding the higher
The machine consists essentially of power modules built on PCB’s and
voltage limit given above will seriously damage the device.
optimised for maximum reliability and minimum maintenance.
- During this event all machine operation will be disabled.
(Fig. B)
- Reset is automatic (the red LED goes off) when the values
1-
Single phase power supply line, rectifier assembly and levelling
determining the above faults return within allowed limits.
capacitors.
3- Yellow LED indicating that the torch is powered.
2-
Transistor (IGBT) switching bridge and drivers ; converts the rectified
- When this is lit it indicates that the cutting circuit is enabled: Pilot
mains voltage into high frequency alternating voltage and adjusts the
Arc or Cutting Arc "ON".
power according to the required cutting current/voltage.
- When it is off (cutting circuit OFF) the torch button is normally
3-
High frequency transformer: the primary winding is powered by the
DISABLED (standby mode).
voltage that has been converted by block 2; its function is to adapt
- It is off, with the torch button enabled, under the following
voltage and current to the values required for the cutting procedure
conditions:
and at the same time to perform galvanic isolation of the cutting circuit
- During the POST AIR phase.
from the main power supply.
- If the pilot arc is not transferred to the piece within a maximum of
4-
Secondary rectifier bridge with levelling inductance: converts the
2 seconds.
alternating voltage/current supplied by the secondary winding into
If the cutting arc is interrupted because the torch and piece are
direct current/voltage with very low ripple.
too far apart, if there is excessive electrode wear or if the torch is
5-
Control and adjustment electronics: controls cutting current value
taken away from the piece by force.
instantaneously and compares it with the operator’s setting;
- If a SAFEGUARD system has triggered.
modulates IGBT driver control pulses that make the adjustment.
4- Green LED indicating presence of mains power supply and that
Determines the dynamic current response during cutting and
auxiliary circuits are powered.
oversees the safety systems.
The control and service circuits are powered.
5- Yellow LED indicating phase failure (where provided).
CONTROL, ADJUSTMENT AND CONNECTION DEVICES
When it comes on the yellow LED indicates a main supply phase
Back panel (Fig. C)
failure, operation is disabled and reset is automatic 4 seconds after
1-
Main switch
the fault has been corrected.
I (ON) Power source ready for operation, torch is not powered. Power
6- Compressed air circuit fault indicator (where provided).
source in standby
YELLOW LED (Fig. D2-6) at the same time as RED general alarm
O (OFF) All functions off; auxiliary devices and indicator lights are all
LED (Fig.D2-2 ).
switched off.
When ON it means that the air pressure is insufficient for correct
2-
Power supply cable
torch operation. During this event all machine operation will be
3-
Compressed air connector (not present in the Kompressor version)
disabled.
Connect the machine to a compressed air circuit with a minimum
Reset is automatic (the LED’s go off) when the pressure returns
pressure of 5 bar and max.8 bar (TAB. 2).
within the allowed limits.
4-
Pressure reduction valve for compressed air hookup (where
7- Air button (where provided).
provided).
When this button is pressed, air will continue to be output from the
torch for a fixed time.
Front panel (Fig. D1)
It is normally used:
1- Cutting current adjustment knob.
- for cooling the torch
Used to set the cutting current intensity supplied by the machine, to
- when adjusting the pressure reading on the pressure gauge.
be chosen according to the application (material thickness / speed).
8- Pressure gauge.
See the TECHNICAL INFORMATION for the correct duty cycle-
Used to read the air pressure.
pause to be chosen, depending on the selected current.
9- Torch connection connector.
2- Yellow LED indicating general alarm event:
Torch with direct or centralised connection.
- When this comes on it indicates overheating of a component in the
- The torch button is the only control device that can be used to
power circuit, or an incorrect input power supply voltage (over- or
control the start and end of cutting operations.
under-voltage). Mains over- or under-voltage safeguard: stops the
- When the button is released the cycle is instantly interrupted at any
machine: the power supply voltage is outside the +/- 15% range
stage, while cooling air (post air) continues.
based on the rating plate value. WARNING: Exceeding the higher
- Accidental operation: the cycle will only start if the button is
voltage limit given above will seriously damage the device.
pressed and kept down for a minimum of some tenths of a second.
- During this event all machine operation will be disabled.
- Electrical safeguard: button operation is disabled if the insulating
- Reset is automatic (the yellow LED goes off) when the values
nozzle holder has NOT been mounted on the head of the torch, or
determining the above faults return within allowed limits.
if it has been mounted incorrectly.
3- Yellow LED indicating that the torch is powered.
10- Earth cable connector
- When this is lit it indicates that the cutting circuit is enabled: Pilot
5. INSTALLATION
Arc or Cutting Arc "ON".
________________________________________________________
- When it is off (cutting circuit OFF) the torch button is normally
DISABLED (standby mode).
WARNING! BEFORE CARRYING OUT INSTALLATION
- 4 -
