
8.LASER OPTICAL SYSTEM B-70315EN/02
- 252 -
8.5.2 Using the Power Probe
(1) Start up the oscillator after modifying the following parameters:
PRM.15000 bit4 → 0 (to disable power compensation)
PRM.15208 4096 (or 6144) → 0 (to disable power feedback)
(2) Specify an irradiation output and start internal discharge. Modify
PRM No. 15204 so that the value of Pa after 1 minute is the
irradiation output.
Suppose that when PRM No. 15204 = 1024, 2000 W is specified,
and the value of Pa is 2100. In this case, the following is
obtained:
1024 × 200/2100 = 975
So, modify the value of PRM No. 15204 to 975.
The specified irradiation output approximately equals the value
of Pa.
(3) Modify the following parameter
PRM.15208 0 → 4096 (or 6144) (to enable power feedback)
(4) Create a program according to the irradiation condition.
Example G32 P1 Q1;
G24 S_ Q100 R_ ; (S : output, R : time)
G32 P0 ;
Table 8.5.2 List of irradiation outputs and irradiation periods
Probe: For 2kW (H-3C)
Laser model
Irradiation output
(W)
Irradiation period
(seconds)
1 C1000-E 1000 20
3 C2000-E 1800 20
4 C4000-E 1800 20
5 C5000-E 1800 20
6 C6000-E 1800 20
When the rated output of the 4000W, 5000W, or 6000W laser is
irradiated to the probe, the maximum allowable laser beam
strength of the probe is exceeded, resulting in a probe surface
destruction. So, when making a measurement, decrease the
output to prevent the probe surface from being destructed. Note,
however, that if dust or dirt is attached to the probe surface, the
probe surface may be destructed by a decreased output.
(5) Place the power probe at the beam outlet of the oscillator. Hold
the probe so that the probe head plane is perpendicular to the
beam.
(6) Perform internal discharge at the irradiation output for 1 minute.
Then, start the program. Record the value of Pa immediately
before the end of the program.
(7) Record the measurement value (hold value) of the probe.
(8) Make three measurements. When one measurement is completed,
cool the probe. Pour tap water onto the probe until the probe is
cooled down to the room temperature. Before making the next
measurement, dry the probe sufficiently by using a drier.