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Chapter 9 Flatness Measurements
Completing the Set Up Flatness Screen
Checking the alignment for beam strength
Before completing the steps in this section, ensure that the reflector is at
its initial position.
1
Set the laser head's upper port to the large aperture.
2
Move the reflector along the travel path and check the Beam Strength
indicator on the Set Up FLATNESS screen.
•
If the beam strength is greater than 60 percent (and the indicator area
is green if you have a color monitor), go directly to "Making the
measurement."
•
If the beam strength is 20 to 60 percent (and the indicator area is
yellow if you have a color monitor), you can make the measurement,
but you risk losing the laser beam return signal during a
measurement. If you lose the signal during a measurement, you will
have to improve the laser beam alignment and take data starting at
the last valid point. You may want to follow the steps in "Improving
beam strength." Otherwise, go directly to "Making the measurement."
•
If the beam strength is less than 20 percent (and the indicator area is
red if you have a color monitor), follow the steps in "Improving beam
strength."
When you have completed the Set Up FLATNESS screen, choose Collect
Data.
The Collect Data: FLATNESS screen is displayed (Figure 9-13).
Measurements Reference Guide
9-29
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