Chapter 9 Flatness Measurements
Setting Up for the Measurement
Measurements Reference Guide 9-11
e. Write down the length of the line in millimeters or inches. You enter
this length in the Set Up FLATNESS screen.
The length of the line is the number of stations multiplied by the
distance between stations.
4 Starting at the end (Point C) of the first perimeter line (Line 3), draw a
second line perpendicular to the first line (Line 4).
Be sure to leave the correct size border between the end of the line and the
edge of the surface plate.
5 Mark stations on Line 4 by following these steps:
a. Starting at the end of the line that connects with Line 3 (Point C),
mark your measurement stations along this line. Be sure to mark an
even number of stations.
The last station you mark is now the end of Line 4 (Point E).
Note the number of stations marked.
b. Mark the midpoint of the line (Point D).
6 Draw the third perimeter line (Line 6) the same length as and parallel to
Line 4.
This line must be perpendicular to the first line.
7 Using Line 4 as a guide, mark stations at the same locations on this line.
Write down the length of the line in millimeters or inches. You enter this
length in the Set Up FLATNESS screen later.
The length of the line is the number of stations multiplied by the distance
between stations.
8 Draw Line 5 by connecting the ends of Lines 4 and 6.
9 Using Line 3 as a guide, mark stations at the same locations on this line.
You should have a rectangle with pairs of equal sides and an equal
number of stations on opposing sides. If you do not, recheck your work.
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