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Accuracy of Feed Axes

From Heidenhain Corporation
 

 
Every year's new machine tools have been showing improvements in efficiency and power. Increasing feed rates and acceleration value have steadily reduced machining times. At the same time, increasing accuracy has permitted ever-closer workpiece tolerances. On the one hand, these developments enable the machining of increasingly critical parts; on the other hand they simplify the manufacture of complex assemblies. Selective manual assembly and bench work can often be eliminated. In addition, higher accuracy of parts normally results in improved function of component assemblies. Dimensional accuracy in motor transmissions, for example, has increased service life and reduced noise emission. In the total error budget of a machine tool the positioning error values of the feed axes play a critical role. The following text discusses these errors and compares them with other types of error.
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