
B–70115EN/03
9. SETTING AND ADJUSTMENT
266
This unit is precisely adjusted at the factory and should not require any
further adjustment. If the exhaust adjustment valve is accidentally
touched or if the exhaust controller is replaced, however, the gas flow
should be checked and the exhaust flow adjustment valve adjusted as
described below.
Note that indiscriminate adjustment may increase the laser gas
consumption or may adversely affect the gas pressure control.
(1)Set parameters 15025 to 15028 [201 to 203] to 0. Then, start the
oscillator.
(2)Set the laser oscillator to the base discharge state (LSTR). No
discharge occurs in the discharge tube with the above parameter
settings.
(3)The gas flow to the laser oscillator is factory–adjusted in this state.
Check the flow rate with a laser gas flowmeter, mounted between the
external laser gas supply (gas cylinder, for example) and oscillator.
(4)While observing the flow rate on the gas flowmeter, adjust the exhaust
flow adjustment valve to obtain a predetermined flow rate.
(5)Stop the oscillator.
(6)Return parameters 15025 to 15028 [201 to 203] to their original
values.
(7)This completes the adjustment.
D Predetermined flow rate
Oscillator model Flow rate
C1500B, C2000B, C2000C,
C3000D, C4000A
10 ȏ/h
C3000C 20 ȏ/h
C6000B 40 ȏ/h
9.5
ADJUSTING THE
EXHAUST CONTROL
UNIT (ADJUSTING
THE LASER GAS
CONSUMPTION)