Classification of cams and followers – Terminology and definitions – Displacement diagrams – Uniform velocity, parabolic, simple harmonic and cycloidal motions – Derivatives of follower motions – Layout of plate cam profiles – Specified contour cams – Circular arc and tangent cams – Pressure angle and undercutting – sizing of cams

1. Unit-3
CAM
TANGENT- CAM

2. TANGENT Cam
When the flanks of the cam are straight and
tangential to the base circle and nose circle,
then the cam is known as tangent cam.

3. Tangent cam when roller has contact with
straight flank

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5. Application of tangent cam
• IC –Engine operating valve

6. CASE -1
When the Roller has contact with straight
flank

7. Case - 1
When the Roller has contact with straight flank
Consider a roller , which rolls from point E from its centre A to new
location B on the pitch curve

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12. CASE -2
When the Roller has contact with Nose

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