B-70315EN/02 3.INSTALLATION
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3.3.10 Beam Mode Check
CAUTION
A beam mode deviation may occur depending on
the transportation method and storage condition.
When installing the oscillator, be sure to perform
this step. A mode deviation does not mean a
failure. Perform alignment by following the
procedure described in Subsection 8.3.2.
(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) Output a laser beam by using programmed commands with the
output set to the rated output, a duty cycle set to 100%, and the
output duration set to 0.1 second. At this time, blow air with a
drier or the like.
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.
CAUTION
Close the shutter when working in the vicinity of
the accessible Class IV laser path. And, confirm
that there are no persons in the vicinity of the
accessible Class IV laser path before starting the
Class IV laser during the Alignment Task when the
Class IV laser path is accessible.
(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. Adjusting the block such that the
guide laser is reflected from the acrylic block surface and returns
to the beam outlet can check the perpendicularity of the acrylic
block surface.