6212C Manual Version 15_22 Rev 07-19.docx
Page 18 of 53
A “start” sensor should be mounted in a location that activates as soon as the surface to
be measured is
entering a position for the Lasercheck head to measure (indicated by laser beam being fully positioned at the
front edge of the measurement area of the part).
Setup and Alignment
Lasercheck head alignment is critical to accurate and repeatable Lasercheck measurements. The section labeled
“Lasercheck Alignment Principles and Procedures” presented later in this manual explains alignment. Users must
read and understand this section prior to designing alignment mounts and fixtures for the Lasercheck head.
Message Type 15
Message Type 15 returns all of the voltage values from each of the 35 individual sensors in the Lasercheck head
during a measurement. These voltage values can be used to determine “Vertical” and “Horizontal” alignment
accuracy of the Lasercheck head during a measurement.
The first value returned after the 35 detector voltage values is the “voltages sum” which is just a mathematic
summation of all voltage values from detectors 1 to 35. This value is used as an aid in horizontal alignment.
The last values returned in this measurement set are the “Max detector: location and value”. For optimal
vertical alignment this “Max detector location” should be detector 6, but 4, 5, 7, or 8 are acceptable. Vertical
alignment on detector 6 provi
des the optimal “+/
-
“ tolerance on vertical alignment, while alignment on 4, 5, 7,
or 8 provide accurate roughness values, but less tolerance on vertical alignment. Vertical alignment can be
interpreted via graphical display of all detector voltages, such as a bar graph display where it is easy to visualize
which detector amongst the 35 has the highest value.
Sample Setup and Alignment Aid from Message Type 15
Note in the sample graph (Figure 5 below) that all 35 voltages from a Message Type 15 are graphed. In this
example it is easy to see that the Max Detector Location is detector number 7 as indicated in the dialog box in
the graph and the largest bar in the graph at the number 7 location. The graphic display and
green
,
yellow
, and
red
color-
coding aid in guiding to optimal alignment location. The “voltages sum” is indicated as “HORIZONTAL
ALIGNMENT VALUE” in the graph.
For a more detailed discussion on alignment of the Lasercheck system please see the appendix section labeled
“Lasercheck Alignment Principles and Procedures”.
