ME 320

Spring 2008

Project 3

The figure below shows a playground shovel. The mechanism should be designed as a quick return mechanism so as not to bore children. Building on your results of the two previous projects, you should include the following steps:

i. Derive the velocity equations for the machine.

ii. Derive the velocity equations for the critical points in the machine.

iii. Write a computer program to simulate the velocity of the machine.

iv. Compare the results with those obtained from Working Model.