Affiliation:
1. Nanjing University of Aeronautics and Astronautics
Abstract
In motion systems driven by stepping motors, reference word interpolation is usually used with a constant period T, in which the existing position quantization errors will inevitably result in the trouble of velocity quantization errors. A separated-axis interpolator with variable period is proposed to deal with these troubles. The reassignment module of displacement and time is the key of the interpolator. In the module, the interpolation period of each axis can be separately adjusted upon its quantized displacement, thus resulting in almost ideal velocity profile and moving smoothness. Simulation and machining results are given and show that the proposed interpolator is effective in the improvement of motion stability and interpolation accuracy.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science
Reference4 articles.
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4. K. Zhou: PC-based �umerical Control Principle, System and Applications (China Machine Press, China 2006). (In Chinese) (a)With constant period interpolator (b)With the proposed interpolator 1、Resultant velocity，2、X axis velocity，3、Y axis velocity Fig. 3 The velocity simulation figures of muti-axis moving 1、With the constant period interpolator 2、With the proposed interpolator Fig. 4 Comparison of the work piece roughness.