
B–70114EN/04
4. FUNCTIONS
106
(29)Control PCB
This PCB sends the contractor open/close signal to the power
magnetics cabinet, as directed by commands received from the CNC.
It also notifies the CNC of the open/close status of the circuit breaker
in the power magnetics cabinet.
(30)Condensation sensor unit
For the C1500B, C2000B, or C3000C, the condensation sensor unit
is mounted at the water port inlet; for the C2000C, C3000D,
C4000A, or C6000B, the unit is mounted on the output mirror holder.
If the sensor detects that the amount of condensation has exceeded
the maximum allowable level, an alarm (abnormal water
temperature) is issued and laser output is stopped, thus preventing a
fault from occurring.
(31)High–frequency inverter
This inverter drives the turbo blower. It is responsible for
acceleration/deceleration control during start and stop of the blower.
(32)Light source for superimposing visible beam (semiconductor laser
unit)
A CO
2
laser beam is invisible to the naked eyes. The semiconductor
light source, therefore, is provided to enable checking of the laser
beam optical axis by superimposing a visible semiconductor laser
beam on the same optical axis. The operation of this light source is
linked to the mechanical shutter. The semiconductor laser beam is
output only while the shutter is closed. Using this beam, the optical
axis of the external optical system can be adjusted roughly and a
reference position for the machining point determined.
(33)Turbo PCB
This PCB relays signals between the turbo blower and
high–frequency inverter, interface PCB.
(34)Trigger electrode
With preparatory discharge outside the laser oscillation area, main
discharge can be started easily, and the laser output becomes
completely zero at beam–off time.
A trigger electrode is installed in the C1500B, C2000C, C3000D,
and C4000A.