
B-70265EN/02 7.UNITS
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7.9 GAS CONTROL UNIT (C1000-E, C5000-E, C6000-E)
7.9.1 Configuration
The gas control unit consists of an charge unit, exhaust unit, pressure
sensors, and so on. Fig. 7.9 shows an installation photo of the gas
control unit. 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.
(9) Exhaust flow rate adjustment valve
This valve adjusts the flow rate of laser gas released from the
oscillator during normal operation.
(10) Exhaust valve
When the oscillator starts, this valve opens to allow laser gas to
escape from the oscillator. During normal operation, this valve is
closed, and a constant amount of gas escapes through the exhaust
flow rate adjustment valve connected in parallel.
(11) Three way valve
This valve connects the exhaust pump to the oscillator to
discharge laser gas from the oscillator during exhaust pump
operation. When the exhaust pump is stopped, this valve
switches to the atmosphere to open the exhaust pump to
atmospheric pressure.