HEIDENHAIN IK 5494-2D - Manual (Page 364)

342 QC5200 Series User’s Guide
During program execution, the initial field of view is evaluated. If the target pattern is not found, and
search rings were specified, the field of view is moved to the lower-left corner of the first search ring.
Then the pattern search continues as a clockwise series of (field of view) rectangles is added until a feature
is found.
If the target feature is not found, the search con-
tinues to the next ring, or stops if no additional
rings were specified.
Enter the number of desired the search rings into the Number of pat-
tern... field.
Specifying search ring overlap
Pattern tool search rings and fields of view must overlap to ensure that target features will be found. This
search ring overlap is specified in pixels.
Target features must be en-
closed completely within a
field of view to be recognized.
Since features can sometimes
be located across the boundary
between two adjacent field of
view rectangles, the specified
search ring overlap must be
slightly larger than the target
feature, as shown in the example here.
Enter the desired overlap in the Search ring overlap field in pixels.
Initial FOV Initial FOV plus 1 search ring Initial FOV plus 2 search rings