A motion on a part consists of a point on a part with six degrees of freedom. Each of the degrees of freedom can be driven with a motion generator. Each motion generator defined removes one degree of freedom.
To create a motion-on-part constraint:
Display the Insert Motion dialog box using one of the following methods:
From the Motion menu, select Motion.
From the Browser, expand the Motions Constraints branch, and then select Add Motion on Part.
From the Browser, select a part node and select Add Motion, Motion on Part.
In the Select 1st Component text box, specify the part where the motion is applied.
In the Select 2nd Component text box, specify the part to which the motion is relative.
Select the location on which the motion acts.
Select a direction that corresponds to the z-axis of the motion. At the point where the motion acts, a local coordinate system is also defined to designate the x, y, and z directions of motion. This section determines the z direction of the motion.
Select another direction that is not collinear with the z direction. This is designated as the x direction of motion. Because the coordinate system defined at the point of motion has to be orthogonal, the specified z-axis is crossed with this axis to obtain the y-axis, and then the y-axis is crossed with the z-axis to obtain the real x-axis. The only way to ensure that the specified direction is really the x-axis is to make it orthogonal with the specified z-axis.
Select the Motion tab to specify the motion generators for each direction.
Each direction may optionally have a motion generator applied. In the Motion On text box, specify the direction, and then specify the motion parameters.
Select Apply to create the motion on part.