refers to the definition of the proper type of mechanism best suited
to the problem and is a form of qualitative synthesis.t This is perhaps the most difficult
task for the student as it requires some experience and knowledge of the various
types of mechanisms which exist and which also may be feasible from a performance
and manufacturing standpoint. As an example, assume that the task is to design a device
to track the straight-line motion of a part on a conveyor belt and spray it with a chemical
coating as it passes by. This has to be done at high, constant speed, with good accuracy
and repeatability, and it must be reliable. Moreover, the solution must be inexpensive.
Unless you have had the opportunity to see a wide variety of mechanical equipment, you
might not be aware that this task could conceivably be accomplished by any of the following
devices