Write a computer program that uses the SCCA family of double

Write a computer program that uses the SCCA family of double-dwell functions to calculate, plot the s-v-a-j curves, and generate the cam shape for a knife-edge follower with arbitrary lift and duration. Test your program to design a double-dwell cam to move a follower from 0 to 2.5 in in 60, dwell for 120, fall 2.5 in in 30, and dwell for the remainder. The total cycle time must take 5 sec. Choose a base radius Rb that makes sense for this design.

Solution

Knife edge follower : the ccontacting end of the follower has a sharp knife edge. a sliding motion exists between the contacting cam and follower surfaces. It is rarely used in practice because the small area of contacting surface results in excessive wear.

Roller follower: It consists of a cylindrical roller which rolls on cam surface. because of the rolling motion between the contacting surfaces. the rate of wear is reduced in comparision with knife edge follower. the roller follower are extensively used where more space is available such as gas and oil engines.