Abstract
A new measuring method has been developed for measuring radial, angular and axial error motions of an axis with a rotating workpiece. The measuring and cutting tests were conducted with a lathe to verify this method. The measured radial and axial error motions of the axis were compared respectively to the out-of-roundness profile and face profile of the workpiece which was machined by a diamond tool. The following conclusions were obtained:(1) Radial, angular and axial error motions were measured exactly by detecting the fluctuations in the gaps between two master balls attached to the spindle and three pick-up devices attached to the tool post.(2) Radial and axial error motions measured by this method correspond closely and respectively to the out-of-roundness profiles and face profiles of the workpiece, machined by a diamond tool.
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