What
does the term jump signifies in cam and follower?
Follower loses contact with cam surface when follower rotates beyond a
particular speed due to gravitational forces.
Follower
loses contact with cam surface when follower rotates beyond a particular speed
due to inertial forces.
Follower
gain contact with cam surface when cam rotates beyond a particular speed due to
gravitational forces.
Follower
loses contact with cam surface when cam rotates beyond a particular speed due
to inertial forces.
Follower
loses contact with cam surface when cam rotates beyond a particular speed due
to inertial forces.
The term jump signifies that follower loses contact with cam surface, when cam rotates beyond a particular speed due to inertial forces.
Hence, the correct option is (D).
&Key Points:-
In
a given specific interval of time, due consideration to the velocity and the
acceleration must be given, the effects of which are manifested as inertial
loads. The dynamic effects of acceleration, usually limit the speed of the
cams. Moreover, effects of jerks (rate of change of acceleration) in case of
high-speed mechanisms produce vibrations of the system, which is undesirable
for a follower motion. Though it is very difficult to completely eliminate jerks,
efforts are to be made to keep it within tolerable limits.
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