Abstract
This paper explains that, as gear-manufacturing technology became more complex, it was more difficult to perform gear measurements with the degree of accuracy required; thus, precision in the field of gear-manufacturing began to suffer partly as a result of this declining precision. The author points out that the demands of total quality management systems, such as Six Sigma and ISO 9000, continue to raise the level of expectation to a defect-free manufacturing, which is being addressed by adding new multi-sensor units to coordinate measurement machines. The paper relates that coordinate measuring machines are not yet able to completely replace CNC generative gear testers, but demands from the automotive industry, new technologies and globalization are creating an environment where these machines will continue to improve in efficiency, precision and cost effectiveness.
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Table of Contents
CMM Introduction
CMM History
The CMM Culture
Management Strategies
Advantages and Disadvantages
Conclusion

From the Paper
"To understand how we got to where we are today, an understanding of CNC Generative Gear Testing Machines may help to clarify the improvements on Coordinate Measurement Machines. CNC generative gear testers are nothing more than computer controlled and fully automated machines that can used to carry out various analytic tests on manufactured gears. The true difference between coordinate measuring machines and the CNC Generative Gear Testing Machines is that the latter are specifically for testing gears. Of course, many in the industry feel that CNC generative gear testers are the most accurate way of measuring axis gears. Coordinate measuring machine offer different options. For instance, coordinate measuring machines have the ability to plot and record many more axis positions. Once recorded, these axis positions serve as the necessary data points to create either two or three dimensional models of a gear or part."

Tags:commonization, automoble, sensor, defect-free, computer