Orbotech Symbion S36, Руководство программиста

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60 Symbion™ Programmer Guide © Orbotech 2005
Draft - Confidential
Location Model – Box In Box
The
Box in Box Model depends upon the allowed positions of the terminals
relative to the defined lands.
The allowed positions for the landings are calculated (in this example the
terminal is allowed to be up to 50% off the land)
The resulting ‘bounding box’ is then compared to the found position of the
component body
Provided the found body position is within the determined ‘bounding box’ then
the Location test will pass.
Location Model – Point In Box
The
Point in Box Model compares the expected centroid of the component
with the found centroid.
The defined tolerance (for e/- 0.2mm) is applied in X and Y about the
centroid, creating a box.
The resulting box is then compared with the centroid of the found component
position.
If the found centroid is within the defined box then the Location test will pass.