
3.INSTALLATION B-70265EN/02
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CAUTION
1 First, check the beam position. Laser light, if
allowed to penetrate the acrylic material because of
incorrect operation, is very dangerous. The paint of
the machine is also likely to be damaged. So,
attach as feel plate, then an acrylic plate, about
30cm × 30cm × 3mm in size.
If a guide laser is used, confirm that CO
2
gas laser
light is directed to the same spot as the guide laser.
2 Ventilate the optical path. Acrylic gas staying
around the optical path can increase the mode
diameter or cause shape deformation, which
prevents correct mode checking.
(4) Next, attach an acrylic block (with a thickness of 30 mm or
more) to the position indicated by the white acrylic mark. Ensure
that the surface of the acrylic block is perpendicular to the
direction of CO
2
gas laser light. The perpendicularity of the
acrylic block surface can be checked by adjusting the block such
that the guide laser is reflected from the acrylic block surface
and returns to the beam outlet.
(5) Set the conditions of the beam output program as follows:
Output = Rated output
Duty = 100 %
Duration = See the following table.
Perform internal discharge with a rated output specified. If actual
output Pa differs from the specified output, mode shape
comparison becomes difficult. So, modify the command so that
the output difference is suppressed to within ±2%.
Example
With the C4000-E, setting is made to output 4080 W to
3920 W.
Model Duration
C1000-E 4 seconds
C2000-E 4 seconds
C4000-E 2.5 seconds
C5000-E 1.5 seconds
C6000-E 2.5 seconds
(6) Direct the drier so that it blows air at 45° to the acrylic block,
then output the beam. If air is not provided correctly, the acrylic
vapor will catch fire. If fire occurs, the mode depth may become
shortened.
The following two types of mode patterns are collected:
Cold mode:
A pattern is obtained after the oscillator is left in the base
discharge state for at least five minutes to let the resonator
cool down.