7.UNITS B-70315EN/02
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7.10 PRESSURE CONTROL UNIT (C2000-E, C4000-E)
7.10.1 Configuration
Fig. 7.10 (a) and (b) show the pressure control unit. Fig. 7.10 (a)
shows the old type, and Fig. 7.10 (b) does the new type. The
difference is pressure sensor PSW1 and PSW2. The following outlines
the functions of components shown in the figure:
(1) Pressure sensor
This sensor monitors the pressure in the pipe on the turbo blower
inlet side.
(2) Atmospheric pressure sensor
This sensor monitors whether the pressure in the oscillator has
reached atmospheric pressure.
(3) Filter
This filter prevents impurities from entering the oscillator.
(4) Gas supply pressure sensor
This sensor continuously monitors the pressure of the laser gas
supplied from an external source (gas cylinder).
(5) Purge valve
When the machine operation stops, this valve supplies laser gas
to the oscillator until the pressure in the oscillator reaches
atmospheric pressure.
(6) External pipe exhaust valve
When the oscillator starts, this valve opens for a certain period of
time to allow laser gas in the laser gas pipe between the oscillator
and gas cylinder to escape.
(7) Gas supply valve
When the machine is operating, this value opens to supply laser
gas to the oscillator.
(8) Pressure control valve
According to the command issued from the CNC, this valve
controls the flow rate of the laser gas supply to maintain a
specified laser gas pressure in the oscillator.