The movements of the machine tool are dependent on linear ways and bearings. During the life of a machine as these wear out the accuracy of the machine is affected. This has an important bearing on the concept of volumetric accuracy. In a conventional three-axis we have 21 position variables to consider. As the structures are composed of heavy parts and are not very symmetrical this factor has a great effect on machine tool performance.
Individual axes take unproportional amount of forces.
In conventional machine tools as the degrees of freedom are limited the fixturing requirements are large. Special tools are needed for various purposes like machining thin wall sections or when parts of workpiece surface are inaccessible. The need for extra tools and fixtures increases machining time and cost to a great degree for applications which require them. This page is maintained by Vivek Saxena .