Why are datum coordinate systems so important?

Datum coordinate systems are used throughout Abaqus/CAE; for example, to define material and connector orientations; to define the orientation of a coupling constraint, an inertia relief load, and boundary conditions; and to position and align part instances.

See Also
Understanding a datum as a feature

In addition, you can select the origin of a datum coordinate system when prompted to select a point, and you can select an axis of a datum coordinate system when prompted to select an edge.

Abaqus/CAE provides three methods for creating a datum coordinate system:

  • Three points

  • Offset from coordinate system

  • Two lines

For more information, see Methods for creating a datum coordinate system. In contrast with other types of datums, you can name a datum coordinate system while you create it. As with all datums, you can use the Model Tree to rename a datum coordinate system.