Basic Gages and Gaging Considerations for Automatic Machine Control

In considering automatic techniques, many and varied definitions of greatly overused and misused words are applied. Certainly ``automatic,´´ ``machine,´´ and ``control´´ are out in front in so far as repetition is concerned. In order to chart a course through the material to be presented in this paper, I will arbitrarily consider that automatic machine control is a condition whereby material is manufactured by a piece of machinery, with suitable equipment to measure the product while it is being manufactured and provide corrections to the machine itself to produce material within desired limits. The gages in this configuration of measuring equipment will be dimensional measuring devices indicating diameter, length, thickness, and so on.