For any machine part that rotates during the simulation, a center of rotation, its local coordinate system must be specified using the Local coordinate system command in the Machine Design menu. Rotating parts include turrets and rotating tables. Parts that rotate about the A axis will rotate about its local X axis. B axis rotations are performed about the local Y axis and C axis rotations rotate around the local Z axis. (Turrets rotate about their local Z axis).
Note that if a solid rotates only if the parent rotates, you do not have to define a local coordinate system.
To complete this dialog:
Pick the solid.
Pick the UCS or click Create UCS and go to the Alignment wizard to create a new UCS.
Click Apply.