Diameter - This box specifies the circle’s diameter. When you select a circle with the mouse in the Graphic Display window, PC-DMIS automatically places the circle’s diameter from the CAD model in this box.
Depth - This parameter controls what data PC-DMIS uses to calculate the feature characteristics. You can use the depth value to eliminate data on a chamfer or some other transitional portion of the feature that you don't want in the feature calculation. Specifying a positive value tells PC-DMIS where along the feature PC-DMIS looks to calculate the feature characteristics. A depth of 0 causes this feature to be calculated at the surface plane height, using data found at the lowest possible depth from the surface plane. A depth of any other value causes it to be calculated at that depth. Due to hardware limitations, for this feature type, if you do use a depth value higher than 0, you must use a minimum of 0.3 mm (.01181 inches).
The depth defaults to zero for a plane feature with no extruded edges. You should only change this to a different value if there are specific requirements from your part's drawing. Otherwise, PC-DMIS unsuccessfully attempts to locate points at the specified depth. This results in a feature calculation error from the feature extraction module.
For example, a depth of 3 indicates that you want to use all data from 3 mm (or inches, depending on the units of the measurement routine) and above for the calculation. If you specify 0, this indicates that you want to use all available data for the calculation. For thin walled features, a 0 value may be valid; but for parts with any depth to them, you probably need to specify a depth to get accurate results.
Even if you specify a depth greater than zero, the measured results are always projected into the plane where the feature resides.
Sample circle in the Graphic Display window that shows:
Depth (blue circle)
Ring Band (pink circles)
Overscan (yellow circle)
Start Angle and End Angle - These boxes let you change the default start and end angles on the feature. This is a user-supplied angle in decimal degrees. If you rotate the view of the feature so that you look down at its center, PC-DMIS shows the portion of the pointcloud to pass to the segregation routine.
Direction - Select the direction in which the hits are taken: CW (clockwise) or CCW (counterclockwise).