There are 3 types of constraint motion:Completely constraint motion:-
when the motion between 2 elements of a pair is in definite direction irrespective of the direction of the force applied.
Example:
sliding pair
turning pair
Incompletely constraint motion:-
when the motion between 2 elements of a pair is possible in more than one direction depending on the fore applied.
Example:
a circular shaft without collar
Successfully constraint motion:-
when motion between 2 elements of a pair is possible in more than one direction but is constrained to remain in one direction by application of external forces.
Example:
Foot step bearing
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