Hardware manual

Circle Gauge Impact Reference Guide
Datalogic Automation Inc. 3-118
Fixed Gradient
Threshold Percent-
age
The gradient threshold value for Gradient Edges Detection Method when
Edge Detection Sensitivity is set to Fixed Threshold
Fixed Grey Level
Threshold Percent-
age
The grey level threshold value for Grey Level Edges Detection Method
when Edge Detection Sensitivity is set to Fixed Threshold
Noise Level The amount of background noise present in the image. Higher noise
means the edges must be farther apart. Lower noise allows edges that
are closer together.
Sampling Percent The radial sampling rate - for example, 100 will sample every radial, 50
will sample every other radial, 0 will sample a minimum of 2 radials.
Higher numbers increase accuracy, lower numbers increase speed.
Outlier Distance
Threshold
Outlying points beyond this distance from the found circle (in units) are
excluded.
Max Percent of
Points Out of Toler-
ance
The tool will fail if the percent of the edge points that are out of tolerance
exceeds this value. A point is out of tolerance if it is not found, is an out-
lier, is out of radius tolerance, or is out of ring thickness tolerance. The
current Percent of Points Out of Tolerance is an output.
Enable Radius
Check
If this is true, the fitted radius and each edge point is checked against the
Inner and Outer Radius tolerance. The tool will fail if the fitted radius
exceeds the tolerance. Each edge point is tested against the tolerance. If
it exceeds the Outer or Inner Radius tolerance, it is put in the outlier
point list and added to the Percent of Points Out of Tolerance.
Outer Radius Toler-
ance
If Enable Radius Check is true, found points outside this tolerance are
excluded from the Outer Edge points. The tool will fail if the Outer Circle
radius is greater than this tolerance. (Circle type is Ring.)
Inner Radius Toler-
ance
If Enable Radius Check is true, found points outside this tolerance are
excluded from the Inner Edge points. The tool will fail if the Inner Circle
radius is greater than this tolerance.
Enable Roundness
Check
If true, the difference is calculated between the greatest radius and least
radius of all the points on the circle, including statistical outliers. If Enable
Smoothing Filter is true, noise points are excluded to provide more reli-
able results.
If a ring is being gauged, then the roundness error is the larger error of
the two circles. The tool fails if this value exceeds the Max Roundness
Error.
Max Roundness
Error
This is the difference between the greatest radius and least radius of all
the points on the circle, including statistical outliers. If a ring is being
gauged, then the roundness error is the larger error of the two circles.
Input Name What it is