About Deviation Analysis

Two types of deviation analysis can be performed: Distance to Surfaces and Geometric. In both cases, the system analyzes the deviation between the selected reference surfaces in the design model and the corresponding best-fit surfaces in the scan sets.

• Distance to Surfaces—Calculates the distance from points in the scan set best-fit surfaces to the corresponding reference surfaces in the design model

• Geometric—Calculates the size (where applicable) of the scan set best-fit surfaces and also the location and orientation of those surfaces relative to their reference surfaces in the design mode

For different types of surfaces, best-fit is calculated in different ways:

• Plane Surface—Calculates the angle between the best-fit and reference planes

• Cylindrical Surface—Calculates the following:

◦ The radius and cylinder length of the best-fit surface

◦ The angle between the best fit surface’s axis and that of the reference surface

• Conical Surface—Calculates the following:

◦ The cone half angle and cone height of the best-fit surface

◦ The angle between the axes of the best fit and reference surfaces

◦ The shift of the best-fit surface’s apex from that of the reference surface

• Spherical Surface—Calculates the following:

◦ The radius of the best-fit surface

◦ The shift of the best-fit of the surface center from that of the reference surface