2.INTERNAL STRUCTURE B-70315EN/02
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(18) Exhaust control unit (C2000-E, C4000-E)
The exhaust control unit is capable of controlling the flow rate of
the gas to be exhausted.
(19) Exhaust pump
This pump is used to vacuum-exhaust laser gas from the gas
circulating system such that its pressure falls to that used for laser
oscillation. In addition, it exhausts part of the degraded gas in the
gas circulating system.
(20) Hour meter
The hour meter records the total number of hours that the laser
oscillator has operated (how many hours the exhaust pump has
operated) to indicate whether maintenance or inspection is
necessary.
(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) Water distributor unit
This unit distributes temperature-regulated external cooling water
to each unit inside the laser oscillator. The unit is equipped with
a flow switch, 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 dew 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.