Re-specifying Geometry Canonicity

This task shows how to re-define a complex edge into a cylindrical surface and apply a size tolerance to the previous redefined geometry.
Re-specifying geometry canonicity offers to re-define user surface or group of surface properties to avoid recognition problem when selecting a geometry. You can re-define the geometry through an existing annotation only.
Open the Tolerancing_Annotations_07 CATPart document.

  1. Click the Tolerancing Advisor icon:

  1. Select the complex edge as shown on the part.

    The Semantic Tolerancing Advisor dialog box appears. Note that no command related to a cylindrical surface is displayed.

  2. Click the Text with Leader icon (One surface):

  1. Enter Hole in the Text Editor dialog box field when appears.

  1. Click OK in the Text Editor dialog box and Close in the Semantic Tolerancing Advisor dialog box.

  1. Right-click the annotation as shown on the part and select the Associated Geometry > Geometry Canonicity Query and Redefinition from the contextual menu. 

    The Canonicity Redefinition dialog box appears.

  2. Select the Redefined by geometry option.

  1. Select the yellow axis line on the part associated with the cylindrical surface definition.

    The Canonicity Redefinition dialog box is updated.
    You can create the axis straightness attribute to the geometry using this option, but cannot change the feature size.

  2. Select the Redefined by mathematical definition option.
    This option lets you create spherical and cylindrical attributes.
    Select the Feature of Size option, the Size field is now enabled and set its value to 20mm and click OK.

    Click the Tolerancing Advisor icon: , the annotation is still selected.

    The Semantic Tolerancing Advisor dialog box displays now command related to a cylindrical surface.

  3. Click the Diameter icon (One surface):

  1. Click OK in the Limit of Size Definition dialog box when appears.

    The diameter dimension annotation is created.

  2. Click Close in the Semantic Tolerancing Advisor dialog box.