
4.INSTALLATION B-70255EN/01
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An alarm, if issued in step (5), check the external laser gas piping and
laser gas composition, or perform aging.
Beam mode check
(1) Remove the guide pipe or the first bend mirror located between
the exit of the laser beam of the oscillator and machine.
(2) Start the oscillator.
(3) 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 in size. Then, output laser light for 0.1 seconds,
with Pc = 1000W output and Du = 100% set by programming. At
this time, provide a flow of air with a drier. If a guide laser is
used, confirm that CO
2
gas laser light is directed to the same spot
as the guide laser.
(4) Next, attach an acrylic block to the position indicated by the
white acrylic mark. Ensure that the surface of the acrylic block is
perpendicular to the direction of CO2 gas laser light. If a guide
laser is used, 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 program as follows:
Output : 1000W / Duty : 100% / Duration : 4.0 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.
(7) Observe the burn pattern, and record the directions (X direction,
Y direction) and output conditions.
Check items
1 Compare the recorded burn pattern with the burn
pattern data attached to the oscillator. Check that
there is no significant difference. Note, however, that
the shape may vary, depending on the distance.
2 Check that the shape is perfectly circular.
3 Check that no interference fringes can be observed
nearby.
If a problem is detected, align the resonator of the oscillator.