What are the three principal forms of locating a workpiece?
The three forms of location: plane, concentric, and radial. Flat surfaces are common workpiece features used for location. Locating from a flat surface is a form of plane location.
What are the functions of Positioning Locators?
The primary function of any locator is to reference the workpiece and to ensure repeatability.
How do you avoid redundant locating?
Redundant locators restrict the same degree of freedom more than once. The simplest way to eliminate it is to check the shop print to find which workpiece feature is the reference feature. Often, the way a part is dimensioned indicates which surfaces or features are important.
How do you prevent improper loading and unloading?
The simplest way to foolproof a workholder is to position one or two pins in a location that ensures correct orientation. With some workpieces, however, more creative approaches to foolproofing must be taken.