Inspection >> Geometric Tolerance >> Circularity

• Inspection >> Geometric Tolerance >> Circularity command calculates and displays the circularity of a selected geometry as the radius difference between two concentric bounding circles on a single plane containing the selected geometry..

Step   

Execute  Inspection >> Geometric Tolerance >> Circularity command as follows:

1. Select Inspection >> Geometric Tolerance >> Circularity from the menu or click the corresponding icon from the Inspection toolbar.

 2. Click the right mouse button, if there is no visible Section Deviation, this shortcut menu appears:

    If there is visible Section Deviation With Surfaces (or With Polygon), this shortcut menu appears:

If there is visible Section Deviation With Curves, this shortcut menu appears:

Click On Vertices to select a geometry composed of vertices, or On Curves to select curves, or On Faces to select a geometry composed of polygonal faces, or On Section to select a geometry on the sections of both the scan shell and the design model, or On Scan Section to select a geometry only on the section of the scan shell, or On Design Section to select a geometry only on the section of the design model, or From Curves to select curves, then calculate circularity for the vertices around them; or Pick Ref. Vector to select a reference vector and use it as the normal of the bounding circles.

 3. After select proper geometry, click Done on the right mouse button shortcut menu.

 4. Select a place to position the Circularity text box.  

Result

• In addition to displaying the circularity value, this function plots the two bounding circles and the radius difference between them.

             

       Plus, Geometric Tolerance Information is displayed in output window as follows,  

       

        ----------------------------------------

        Geometric Tolerance Information

        ----------------------------------------

        * Name: Circularity 19

        * Circularity : 6.010mm

        * Circle Center: 15.736, -15.082, -25.591

        * Circle Axis: 0.046, 0.462, 0.886

        * Inner Radius: 3.561mm

        * Outer Radius: 9.570mm

        * Average Radius: 6.668mm

        * Standard Deviation : 1.041

        * Region Type : User selected vertices

 Note

• Smaller circularity value indicates a more circular geometry. Zero value indicates a completely circular geometry.
• This command calculates the best orientation for placing a plane with two concentric circles containing the selected geometry between them so that the radius difference is minimal. This radius difference is the circularity of the selected geometries.
• All Circularity are registered to the Geometric Tolerance node in the Project Tree Window.
• The difference between the RMB menu options beginning with On ... ( such as On Curves, On surfaces, On Faces, etc) and those beginning with From ... (such as From Curves, From Surfaces, From Faces, etc) is: when you select On ..., you can use the geometries on only one scan shell; but when you select From ..., you can use the geometries on many scan shells.