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Omission of Data
When you have a component with a feature
which is unavoidable to trace but which
should not be included in the roundness
calculation then the data for the feature can
be omitted from the overall trace.
To do this, press the Data Omission icon or select Set Omission Points from the
Options menu.
Then move the mouse pointer to one side of the feature
that you want to remove.
Click the left-hand mouse button once to select a point
and then double click or press Enter to confirm the
selection and a dotted green line will appear to signify
that the selection has been acknowledged. Move the
pointer to the other side of the feature and repeat the
selection process.
The selected region will then appear as a hatched pie
section. If there are more areas to be omitted from the
trace then the selection process should be repeated until
all the areas that are required to be omitted are hatched.
Then press the Redraw button or Close button and the
trace will be redrawn with the selected area(s) removed.
As the trace is redrawn, the roundness results are
recalculated so that the omitted area is ignored in the
calculations.
When data omission points have been set, the view is
automatically changed to draw the trace with the
selected areas removed. If you wish to see the trace in
its entirety then, from within the View menu, select
All Data. Select Omitted Data to see the trace with
omitted areas removed.
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