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Investigation and application of NURBS Interpolation in PLC-based open CNC system

Jianhui Wang

Abstract

Aiming at a PLC-based open CNC system,NURBS(Non-Uniform Rational B-Spline)curve interpolation technology has been applied to improve traditional free curve interpolation arithmetic. At the same time,according to the STEP-NC standard,a new type CNC method has been studied which can achieve an integrated CAD/CAM/CNC system,the data transfering between CAD and CNC system has been completed by ActiveX,and the method has been applied in experiment CNC system. The experiment results show that,the improved NURBS interpolation can improve the speed and precision of real time interpolation,and work efficiency of CNC system effectively.

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Available abstract

Key concepts: Interpolation (computer graphics), Numerical control, Spline interpolation, CAD, Computer science, Linear interpolation, Engineering drawing, Algorithm