Development & Research Of Open CNC System In Woodworking MC

Numerical Control (NC) technology is the foundation and the core of advanced manufacture technology. Nowadays, the open-architecture NC System is the inevitable trend of CNC technology development. It has been obtained increasingly widespread application on all kinds of NC machine tools.This paper analyzed the characteristic of woodwork numerical control processing. The open CNC system in Woodworking Machining Center (MC) that is interoperable, portable and expandable was developed based on PC and Windows operating system with Object-Oriented Programming (OOP), Multi-thread Programming, and so on.The article analyzed the domestic and foreign development survey of open architecture numerical control system and its application to Woodworking MC, and built the frame structure of this CNC system. Using the"CNC-embedded PC"structure and the master-slave CPU architecture, the real-time control part was completed by the MC6414P motion control card, and the non-real-time control part was completed by the PC.The control software of the CNC system in Woodworking MC based upon Single Document Interface (SDI) was developed, utilizing the function libraries, such as MFC, API, and DLL etc., with the development platform of Visual C++. Each function module was studied; furthermore, the module of editing and compiling CNC code was designed in detail. The entire CNC program was translated; the data was serialized and saved to the document. It can simplify the operation, shorten the compiling time, and boost production efficiency via the compiling method.The Fixed Woodwork Processing Cycles (FWPC) were researched by taking circinal eyelets and dual column tenons FWPC as examples.The author used mathematical knowledge, such as vector, complex number etc. to determine criterion condition of the Cutter Radius Compensation (CRC) connection types, and completed the process of its setting up, executing and cancelling.The time-sharing method is improved so as to interpolate line, circular arc, elliptical arc, parabola and helix.The semi-closed loop servo-control was adopted to install and debug the software and the hardware of this system. Most functions were realized except main motion control and auxiliary motion control.