Kinematic constraint for fixing distance between two frame origins
This block represents a kinematic constraint for fixing the separation distance between two frame origins. The two constrained frames, base and follower, lose one translational degree of freedom with respect to each other. Frame orientation is not affected. Other kinematic constraints, such as those due to joints and model topology, typically remove additional degrees of freedom, further constraining the relative motion possible between the two frames.
The figure shows the separation distance between two arbitrarily oriented frames. The frames can spin with respect to each other if at least one rotational degree of freedom exists between the two.