Question

Calculate angle and lift for each segment.

A plate cam with a reciprocating follower is to rotate clockwise at 400 rev/min. The follower is to dwell for 60° of cam rotation, after which it is to rise to a lift of 2.5 in. During 1 in of the return motion, it must have a constant velocity of -40 in/s. Recommend standard cam motions from Sec. 6.7 to be used for high-speed operation, and determine the corresponding lifts and cam rotation angles for each segment of the cam.

Answer 1

Ano: Green dalā, Rotational speed of the com, wc400g/m Dwell angle 9, + 60° = 778 # 25.in fall, §=lin. Velocity during relūrn Sbioke, o = soins Calculate the time duration for the foll ge the follower, Mg = Sle 40 inls line sit=760.5. Calculate the angular speed as the follower, 20 21TXcod w = 40 rade Calculate the angular displacement of the follower during fall, @= 10% 40713 - 2014

4011 - cibo=1473 8 - 217/3 = 773 .:09 = 773 +22713 Oz = 37/3 --03=27 Consider the diagram f& cam rotation angles f& each segment of the com and Coresponding files, Displacement as 2011 - - - I owell live ! fall | Rust 0,743 0= 2/3 gati cam rotation angle Here, the above diagram shows the cam rotation angles for each regrnent of the car and their Chesponding Lift: