Abstract
Abstract
At present, the focus of CNC technology is mainly towards open CNC systems and cloud manufacturing. But the motion control of the CNC system is still mainly composed of interpolation and motion execution. In order to improve the accuracy and quality of interpolation, the applied algorithms are becoming more and more complex. When encountering complex trajectories, minor modifications require complex calculations. To solve this problem, a new CNC system architecture is proposed, that is, adding processing functions after interpolation. Put the minor modification of the trajectory after the interpolation. The article first introduces the CNC architecture with offline interpolation post-processing (OIPP). Then the Interpolation Byte Stream (IBS) format used to represent the interpolation data is introduced. Since the IBS format has the dual characteristics of geometry and string, geometric transformation and text processing both can be used in processing operation. On the basis of the software program and the matching motion controller, the WEDM-CNC system with post-interpolation processing function is implemented. The interpolated data transmission in the developed system adopts a dual-pointer structure, which can effectively control the data transmission. Finally, the feasibility of the new CNC system was verified through machining experiments. Experiments show that offline interpolation post-processing can modify the interpolated data with high precision and flexibility.