
B-70264EN/02 3.INTERNAL STRUCTURE
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(21) Shutter
The shutter is normally closed to keep the laser beam inside, and
can be opened and closed with CNC commands. It is equipped
with a position sensor and a temperature sensor and constantly
monitors the open/close status and the shutter mirror
temperature.
(22) Beam absorber
To perform laser oscillation without emitting the laser beam to
the outside, the laser beam is reflected on the shutter mirror and
guided into the beam absorber. The absorber, which is water-
cooled, absorbs the laser beam. The absorber is equipped with a
temperature sensor which allows the system to constantly
monitor the temperature of the absorber.
(23) Distribution unit
This unit distributes temperature-regulated external cooling
water to each unit inside the laser oscillator. The unit is equipped
with a flow sensor which allows the system to constantly
monitor the flow rate of the cooling water.
(24) Intermediate PCB B
This PCB relays signals collected into the shutter section, such
as those from the limit switch, absorber temperature sensor,
power sensor, and condensation sensor, to the interface PCB.
(25) Input unit
This unit distributes the power supplied to the oscillator to each
unit in the laser oscillator. It also protects each unit from
overcurrents.
(26) Input unit control PCB
This PCB relays contactor open/close signals according to CNC
commands to the input unit.
(27) Interface PCB
This PCB communicates with the CNC via the FANUC I/O
LINK (serial interface).
(28) Stabilized power supply
This unit supplies DC power (24 VDC) to the interface PCB and
various units.
(29) Dew sensor
This sensor is mounted to the output mirror holder to monitor the
output mirror for condensation. It prevents faults in each unit
from occurring due to condensation.