6212C Manual Version 15_22 Rev 07-19.docx
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On these rougher surfaces, we cannot do height alignment with Laserchecks' help. What must be done is to
either align on a smooth surface in the exact position the rough surface is at or make the rough surface look
smooth to Lasercheck for just the alignment. A reliable way to make a rough surface look smooth to Lasercheck
is to wipe a thin film of oil on the surface. This makes the surface look “slick” to the human eye and
to
Lasercheck. Position the oiled portion of the surface under Lasercheck and proceed with the vertical alignment
to position the specular center on detector #6.
It is important to perform this alignment at least once because the signals from a well-aligned rough surface can
be identical to signals from a misaligned smooth or rough surface. You must be certain Lasercheck is aligned to
rely on “rough” surface measurements.
Horizontal Alignment
You should also note that the maximum reading observed on sum_voltage will typically be lower on rough or
non-metallic surfaces than on smooth and metallic surfaces because less light is reflected and scattered into our
detectors on rough or non-metallic surfaces.
Recommended Alignment Diagnostics
Since alignment is critical to reliable Lasercheck measurements, alignment aids built into user software are
recommended for systems so customers can check Lasercheck alignment of custom fixtures or mounts used in
automated and OEM equipment. Instructions and alignment aids should guide users through the following
procedures:
Verifying Alignment Procedures
Set Head Close to Correct Position
Horizontal and vertical alignment should be close before performing any alignment with any software alignment
aid. If Lasercheck is badly misaligned, than the software cannot locate the specular laser beam for vertical
alignment and has little or no signal for horizontal alignment.
Align Horizontally
Horizontal alignment works best on a clean, rough surface (greater than 10 microinches) with a dominant
roughness direction, for example a ground surface. With an alignment aid, set the horizontal alignment as close
to optimal as possible. Maximizing the value of sum_voltage displayed on software does this.
Align Vertically
Vertical alignment works best on a smooth surface. Move the head up or down over a smooth area (or a rough
area coated with a film of oil). Use a software alignment aid to position the specular beam on detector # 4, 5, 6,
7, or 8 (ideally on detector #6).
