CNC Applications History and Terminology A-PDF Merger DEMO : Purchase from to remove the watermark
Background & Definitions (Chapter 1) • Requirements for a skilled machinist ° Serve a 4 year apprenticeship including classes in algebra, trigonometry, print reading, and drafting along with 8,000 hours of on-the-job-training. ° The machinist must purchase several thousand dollars worth of precision tools. ° Machinists often make a lower hourly wage than other skilled trades such as electricians and plumbers. ° Production operations often require a very skilled person to perform the same operations over and over which most machinists find boring.
Background & Definitions (continued) • During the 1930’s and 1940’s, there was much labor unrest between machinists and management at large companies. Work stoppages and strikes angered management. • At the same time, World War II increased the complexity of parts required for common products. • The most complicated product at the time was the jet aircraft which required large quantities of complex, high- precision components.