CATIA V5 with DMU Kinematic Analysis of Mechanism with Clash

Revolute Joint

The Revolute joint is a rotation joint. It eliminates five degrees of freedom and allows only one rotation It is used when one part must rotate with respect to another about linear axis common to both parts A good example is a bearing rotating on a shaft.

Prismatic Joint

The Prismatic joint is a translation joint. It eliminates five degrees of freedom and allows only n translation. It is used when one part must slide in a specific linear direction with respect to another good example is the way a drawer apens and closes within a kitchen cabinet.

Cylindrical Joint

The Cylindrical joint is a translation and/or rotation joint. It eliminates four degrees of freedom, and allows one translation and one rotation (independent of each other). It is used to rotate and/or translate part with respect to another, both motions relative to a common linear axis. A good example is the way a periscope can be raised and lowered, and also rotated. one If required by the mechanism, a Cylindrical joint can be controlled by either a length Command, an angle Command, or both

Screw Joint

The Screw jotnt is a translaton and rotatlon , linked together with a speclied Pitch ratio. It elininates five degrees of trccdom andallews elthcr a tranlation or a rotation (he chosen one driving the other) Ie is used when one part ned to movarly wlile being roated wii respect to another parr (e.g. a nur being tightened on a bolt), or wh:n moving a part linearly caases it to rotate witrespect to another (eg a childs toy where a pknger is puthed to nake the toy spin). 

Point Curve joint is a translation and rotation joint. It eliminates two translations, and allows three rotations and one translation (along a specified curve). It is used when a point on one part needs to follow a curve on another part. The free translation (along the curve) can be controlled using a length Command. However, none of the free rotations of a Point Curve joint can be controlled by Commands; the parts involved must also have joints with other parts in the assembly to eliminate these degrees of freedom. The Point Curve joint can only be used in the overall scheme of a mechanism with multiple joints.

The Roll Curve joint is a translation and rotation joint. It eliminates four degrees of freedom and allows one rotation (as a part 'rolls') and one translation (a distance along a curve). It is used when one part needs to move along another, maintaining contact without sliding (in other words, one rolls along the other). A good example is in a roller bearing where the inner bearing will spin while the outer bearing rotates about its center axis If required by the mechanism, a Roll Curve joint can be controlled with a length Command.

Cable Joints The Cable joint is a translation joint. It consists of two prismatic joints, considered sub - joints of Cable joint, which are linked with a Ratio. This joint is used when a translational motion of one part causes a translational motion of another, either at the same rate or based on a ratio. An example is in hydraulic mechanism where moving a piston in one cylinder causes a piston in another cylinder to move a different distance, depending on the volume. If required by the mechanism. a Cable joint can be controlled by one of the two length Commands.