HEIDENHAIN IK 5394-3D - Manual (Page 376)

5-16
Chapter 5 Tolerancing & Templates
Straightness tolerance (lines)
Use straightness tolerancing to calculate the straightness of a line and pass/fail
results. Each point probed on a line is checked against the straightness toler-
ance. A minimum of three points distributed along the line are required (more
points increase accuracy).
NOTE
It is possible to perform a straightness tolerance on a line with
only two points. This tolerance is meaningless because it is
impossible for either point to be 'out' of the tolerance zone. Use
a minimum of three points when performing a straightness
tolerance.
To perform a straightness tolerance (lines)
Step 1
Highlight the desired feature in the features list.
NOTE
Use a line only. Straightness tolerances do not apply to other
types of features.
Step 2
Click the straightness button on the tolerance toolbar.
Step 3
Enter a value in the tolerance zone box as shown.
CAUTION
Enter tolerance values in the appropriate units of measurement.
For example, if you are measuring in metric (mm) enter tolerance
data in metric (mm).