Constructing a Circle Feature  

This procedure describes how to construct a circle feature.  A construct circle feature will appear as an activity of the process on the PPR tree.
To construct a circle feature, you must have a product loaded and at least three points defined.

  1. Select the parent process or preceding activity for the construct circle activity. 

  2. On the toolbar, click Construct Circle.

    The Constructed Circle Feature dialog box appears.
    The dialog boxes for constructed features vary according to the construction method selected.  An explanation of the requirements for each method appears in the table below.
     
    Method Explanation
    Best Fit Select at least 3 points.
    Transform Signifies that the constructed feature is a copy of the previously measured or constructed feature except that the previously measured or constructed feature is transformed to the specified coordinate system or to the current coordinate system when no coordinate system has been specified.

    In an inspect context, the feature is just duplicated. To put this feature in a different alignment, the user will have to use the move after command and position the feature after an Activate Alignment activity

    Required for construction:

    • Feature
    Projection Signifies that the feature to be constructed is to be the projection of a previously defined and measured feature onto the specified feature.  Required for construction:
    • Circle feature
    • Plane reducible feature
    Tangent Select two circles or lines and a diameter.  The software then provides multiple solutions (visible on the geometry when selected in the dialog) for construction.
    Intersection Required for construction:
    • Plane
    • Cone
    Cone Diameter Signifies that the circle will be constructed on the actual cone where the cone has a diameter of the value specified by diameter. Required for construction:
    • Cone
    • Diameter
    Cone Distance Signifies that the circle will be constructed at a specified distance from the actual cone vertex along the actual cone axis. Required for construction:
    • Cone
    • Distance
    See also Using Bounds.

  3. Click OK.

    The activity is added to the PPR tree and the constructed circle appears highlighted in pink on the part geometry.
To provide a non-default name for the feature you have constructed, by entering the name in the Feature Name box.