Calculated Point Calculated Point Often, the most accurate way to calculate a point is to calculate it from other features. For example, Calculated Points can be calculated based on the intersection of two lines, a line and a circle, or midway between two points. A Calculated Point tool is also used to place a fixed point in the field of view. A fixed point could be used if you want to make all your measurements from a known reference point. The Calculated Point tool calculates a point based on the calculation mode. Possible modes are:
l Midpoint (midpoint between two points) l Point and a line (closet point on the line to another point) l Point and an arc (closest point on the arc to another point) l Fixed point l A line and an arc (Line/Arc intersection) l Two lines (Line-line intersection) l Two arcs (Arc-arc intersection) To create a Calculated Point tool, right-click in the Tree structure, then select: New > Vision > Tool > Calculated Point The following example calculates the bottom-left corner of the wafer, given the bottom and left edges. ACEUser's Guide, 3.6.x, 18316-000 Rev A Page 437