Known Limitations of Compare Geometry

• Compare Geometry treats each solid as a single entity. It does not compare the features of the parts, and cannot point out differences in feature parameters. To compare features, click Utilities, Compare Features.

• When comparing analytic faces (planes, cylinders, spheres, and so on) the equations of the underlying surfaces are used. However, with spline faces, a discrete sampling technique is used to compare the equality of the underlying spline surfaces. Under certain circumstances, the comparison of spline faces may give inaccurate results.

• The volume difference computation for parts containing a large number of spline faces may occasionally fail. You can turn the volume comparison option off for parts containing a large number of spline faces.

• If the faces are sliver faces or have very small areas, the results for unique and modified faces may be incorrect.

• If FeatureWorks is installed on your machine and you open a part without parameterized features, the following occurs:

FeatureWorks displays a dialog box that asks if you want to proceed with feature recognition for the imported part. Click No.

If you click Yes, which starts feature recognition, do not click Run Comparison in the Compare Features Task Pane. Running the two simultaneously can have undesirable results.

• Compare Geometry requires that the two parts (or assemblies) are in the same position with respect to the origin. If one of the parts (or assemblies) has been moved, the results may be incorrect. Select Align parts to compare geometrically similar bodies located in different positions, relative to the origin.