Getting the Fixturing Just Right
A gage requires just enough fixturing to do its job accurately and cost-effectively. Since the fixture establishes the relationship between the workpiece and the measuring system, its design and manufacture is as important to accurate gaging as the measuring instrument itself. However, in addition to accuracy issues, the fixture design can make a difference in a gage’s efficiency and economy of use.
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Fixturing is a capital expense, and it often involves a significant outlay. A manufacturer of critical parts, therefore, must carefully weigh his or her needs when purchasing a fixture. Too much fixturing can mean unnecessary expenses that will never be amortized. Too little (a much more common error) can result in a range of problems, including inaccurate measurements, excessive measuring time, inability to operate without excessive training or expertise, inflexible use and even unreliable gaging information.
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