Overview of Motion
A motion generator dictates the movement of a part as a function of time. It supplies whatever force is
required to make the part satisfy the motion. For example, a translational joint motion prescribes that a
joint on a part move at 10 mm/second in the z direction. You can apply the motion to either idealized
joints or between a pair of parts.
Types of Motion
Adams/View provides you with the following types of motion:
• Joint Motion - Prescribes translational or rotational motion on a translational, revolute, or
cylindrical joint. Each joint motion removes one degree of freedom (DOF) from your model.
Joint motions are very easy to create, but they limit you to motions that are applied to the above
listed joints and movements in only one direction or rotation.
• Point Motion - Prescribes the movement between two parts. When you create a point motion,
you specify the direction along which the motion occurs. You can impose a point motion on any
type of idealized joint, such as a spherical or cylindrical.
Point motions enable you to build complex movements into your model without having to add
joints or invisible parts. For example, you can represent the movement along an arc, of a ship in
the ocean, or a robot’s arm.
For more on point motions, see About Creating Point Motions.
Defining the Motion Magnitude
You can define motion as acceleration, displacement, or velocity over time. By default, Adams/View
creates a motion that moves at a constant velocity over time. When you create a motion, you can define
its magnitude by entering one of the following:
• Translational or rotational speed - As you create a motion, you can specify the translational or
rotational speed of the motion. By default, you enter the rotational speed in number of degrees
per second and the translational speed in length units per time unit (for example, number of
inches per second).
When Adams/View creates the motion, it uses the value you enter as the motion function. It also