Evaluation of CMM Accuracy by Using Capability Indexes

Abstract:

Capability indexes of several types belong to the most common tools used for evaluation of the measuring instruments performance over a certain period of time. The indices differ by calculation method, properties as well as by intended use. But their design principle is approximately the same. The ratio of prescribed (required) accuracy and really achieved process accuracy is always observed. However, this evaluation represents only a part of the overall measurements management system. The suitability of capability indexes for the evaluation of CMMs accuracy over a time. After analyzing the results we had found machine capability indexes good method for evaluation of Coordinate Measuring Machines (CMM) accuracy over a certain time interval. CMM are high accuracy and capable to perform the measurement of lengths, machine capability indexes helps to determine the ability for coordinate measuring machine between tolerance limits and engineering specifications, but the use of x-control charts to get and keep processes under control.

• Periodical: Applied Mechanics and Materials (Volume 281)
• Pages: 282-286
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.281.282
• Online since: January 2013
• Authors: Adel Elhadi M. Yahya, Martin Halaj
• Keywords: Accuracy, Capability Indexes, CMM, Machine Capability, Monitoring Process

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