## Theory of Machine Angle of descent of cam is defined as the angle

Through which the cam rotates during the period in which the follower remains in the highest position
Of rotation of the cam for a definite displacement of the follower
Moved by the cam from the instant the follower begins to rise, till it reaches its highest position
During which the follower returns to its initial position

## Theory of Machine Angle of dwell of cam is defined as the angle

Of rotation of the cam for definite displacement of the follower
Through which the cam rotates during the period in which the follower remains in the highest position
During which the follower returns to its initial position
Moved by the cam from the instant the follower begins to rise, till it reaches its highest position

## Theory of Machine Cam angle is defined as the angle

Of rotation of the cam for a definite displacement of the follower
During which the follower returns to its initial position
Through which, the cam rotates during the period in which the follower remains in the highest position
Moved by the cam from the instant the follower begins to rise, till it reaches its highest position

Inversion
Kinematic chain
Structure
Mechanism

## Theory of Machine The relation between number of links (l) and number of joints (j) in a kinematic chain is

l = (2/3).(j + 2)
l = (3/4).(j + 3)
l = (1/2).(j + 2)
l = j + 4