HEIDENHAIN IK 5494-2D - Manual (Page 293)

271
8
Programming
Specifying a filtration error limit
The quantization factor is
the maximum acceptable
point error. It is specified
by the user in millimeters.
Points with errors that
exceed this limit and are
outside the standard devi-
ation range are extracted
from the total population.
For most measurements,
the default quantization
factor of 3 microns (0.00012 inch) or less can be applied.
However, measurements that contain larger numbers of
aberrant points might benefit from higher quantization
factors.
Enter the filtration error limit into the Quantization field.
Specifying a filtration standard deviation range
The standard deviation range is a standard deviation (Sigma) of the total point population multiplied by the
Sigma Factor. Points with errors that are outside the standard deviation range and exceed the quantization
limit are extracted from the total population.
Standard deviation range = Sigma factor X Sigma
In the example at the right, a Sigma factor of 2.0 produces a Stan-
dard deviation range that includes 95.5% of the total population.
Standard deviation range = Sigma factor X Sigma
For a Sigma factor = 2.0,
Standard deviation range = 2 Sigma = 0.955
For most measurements, a Sigma factor of 2 or more can be ap-
plied. However, measurements that include a large number of
aberrant points might benefit from a lower Sigma factor.
Enter the desired Sigma factor into the Sigma Factor field.
Max error
±2 Sigma
Editing Programs