Cam fundamentals: Cams are widely used to produce prescribed, regular, and repeating motion cycles (rise–dwell–fall, etc.) of a follower. Decide whether this statement is correct.

Introduction / Context:
A cam is a shaped driver that imparts a programed displacement to a follower. Classic cam cycles include rise, dwell, and fall, repeated every revolution. This question checks recognition of the cam’s role in motion generation.

Given Data / Assumptions:

• The follower can translate or oscillate.
• The displacement diagram encodes the motion law (e.g., SHM, cycloidal, constant acceleration).
• The cam rotates or oscillates periodically.

Concept / Approach:
Because the cam profile is fixed, each cycle repeats the same follower motion per revolution (or per oscillation). Choice of motion law controls velocity/acceleration/jerk, affecting wear and vibration. Hence cams are ideal for mechanisms requiring timed, repetitive operations (e.g., valves, packaging machines).

Step-by-Step Solution:
1) Define the output motion using a displacement diagram over 0–360 degrees.2) Select a motion law to manage jerk and dynamics.3) Synthesize the cam profile from the diagram.4) As the cam rotates, the follower motion repeats each revolution.

Verification / Alternative check:
Valve trains in engines and indexing machinery exemplify repeatable cam-driven cycles.

Why Other Options Are Wrong:
“Incorrect”/“Random motion”: A deterministic profile yields deterministic, repeating motion.“Only gears can”: Gears transmit motion; cams generate prescribed displacement programs.

Common Pitfalls:
Ignoring jerk; using sharp corners in the profile; underestimating follower mass and spring preload.

Final Answer:
Correct