Abstract:
Based on the
kinematics of the multi-body system, a general model for the
positioning errors of NC machine tools by means of the lower
numbered body array and the geometric constraint is presented.
The parameters identification of geometric errors by an
improved 22-line method is discussed. Moreover, an intelligent
error compensation controller has been developed. All these are
verified by a series of experiments on XH714 machining center.
The results show that the positioning errors with compensation
have been reduced to ±7μm from 50 μm.
Key words:
NC machine tool Multi-body system Parameter identification
Manuscript received on June
8, 1995; revised manuscript December 28, 1995
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