For high speed engines, the cam follower should move with _______.

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JKSSB JE Mechanical 02 Nov 2021 Shift 1 Official Paper
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  1. cycloidal motion
  2. simple harmonic motion
  3. uniform velocity
  4. uniform acceleration and retardation 

Answer (Detailed Solution Below)

Option 1 : cycloidal motion
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Detailed Solution

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Concept:

  • Cycloidal motion curve has the best dynamic characteristics. The acceleration is finite at all times and the starting and ending acceleration is zero. It will yield a cam mechanism with the lowest vibration, stress, noise and shock characteristics. 
  • Hence for the high-speed engine, the cam follower should move with Cycloidal motion.

Important Points

Uniform velocity motion

324

Uniform Acceleration and Retardation

TOM 12

Simple harmonic motion

325

Cycloidal motion

326

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