PTC Creo ModelCheck Teacher: Datum Features
Datums are non solid geometric objects that are used as construction features to help model other features and assemble components. The major different types of datums are:
• Planes
• Coordinate Systems
• Axes
• Curves
• Points
There are several key rules to follow when using datums:
• Always start new parts and assemblies with default datum planes and coordinate systems.
• If you do not need a datum, delete it, it is overhead to your model.
• If Creo ModelCHECK complains that there is a datum plane that has only one parent that is also a datum plane, do the following:
◦ Redefine the children so that they reference the parent datum plane.
◦ Delete the datum plane.