A screw joint is a five degree-of-freedom kinematic pair used in mechanisms. Screw
joints imposes a relation between the rotation of one body (Body 1) about an axis to the
translation of the other body (Body 2) along an axis. The pitch of the joint completes this
relation. One full rotation of Body 1 translates Body 2 by a distance equal to the pitch.
Screw joints are commonly used in applications such as bolt and nut constraints and rack and
pinion steering.
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If the Joints panel is not currently displayed, select the desired joint by
clicking on it in the Project Browser or in the modeling window.
The Joints panel is automatically displayed.
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From the Connectivity tab, click Body
1 and pick a body from the modeling window, or double-click Body 1 to open the Model Tree (from which the desired body can be
selected).
Note: If the selected joint is a pair entity, first distinguish between the
Left and Right tabs in the
panel, and then edit the properties. When defining a pair joint, use pair
entities for Body, Origin, etc.
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Similarly, click Body 2 and
select the desired body from the modeling window (or use
the Model Tree).
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Click the Point
collector (under Origin) and select a point from the modeling window, or double click the
Point collector to open the Model Tree (from which the desired point can be selected).
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Specify the alignment axis for the joint.
- Point - Select a point that lies on the desired
alignment axis for the joint.
- Vector - If the alignment axis for the joint is
along any of the global axes, then the global x, y,or z axis can be selected
by clicking on the desired axis in the modeling window or by browsing through the Model Tree.
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Click the Properties tab and enter a value for Pitch.
If editing a compliant joint, see Edit Compliant Joints or Bushings. To edit user-defined
properties, see Edit User-Defined Joints.