Abstract
To enhance a machine's ability for precision machining task, an efficient compensation scheme that takes all error sources into account is needed. In this study, an effective static/quasi-static error compensation system composed of an interpolation algorithm based on shape functions for error prediction, and a recursive software compensation procedure, was developed. The new error prediction scheme taking consideration of the fact that machine structure is non-rigid, is efficient enough to be implemented on-line. In addition, an automatic NC code converting software was also developed so that the developed system can be applied to practical machining for CNC multi-axis machines. A NC program identifying/rewriting system by C^<++> language was developed to identify and extract the nominal positions of cutter for processing error prediction and compensation. To verify the algorithm and system, cutting experiments were conducted, and the results have shown the success of the proposed error compensation system.
