Silk screen
features are composed of a number of other features (lines and arcs).
Measurements, by default, are reported for each and every one of
the features within the distance specified by ERF parameter pp_spacing.
This can result in many unnecessary measurements, depending upon
what an operator is checking. The ERF variable v_results_grouping
allows grouping silk screen features. Only one measurement from
each close string (dependent upon attribute String Value) or from
the closest string only can be reported. The differences are illustrated
below: