Question

In cam profile design indicate how and why a parabolic curve may be linked to a constant velocity rise or fall. Determine the location of the points of inflection on a cam displacement diagram when a parabolic curve is used to link a dwell with a constant velocity rise. [6] (b) Sketch displacement, velocity, acceleration and jerk diagrams for a cam sequence consisting of dwell (30o ), rise (150 o ), dwell (30 o ) and fall (150 o ) that uses parabolic motion only. [7] (c) Cycloidal motion is being used in place of the parabolic curves used to link the two dwells described in 3(b) above. Draw the velocity and acceleration diagrams for this instance?

Answer 1