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CNC part program simulation using solid modelling techniques

Vosniakos G., Kollios D.

Image Processing & Communications

2002

Vol. 8, no 2

71-79

CNC programming on all but the simplest cases needs graphical verification or simulation. The programming paradigm advocated for this task is line-by-line execution of the program with simultaneous creation of the volumes swept by the cutting tool and their subsequent subtraction from the volume of the initial material block. Tool movement is defined following ISO (or G-) codes and auxiliary commands are supported, too, e.g. tool change. A library of tools is maintained and can be easily expanded. The system exploits Boolean operators (notably subtraction) and solid creation operators (extrusion, revolution) as well as solid manipulation operators (3D rotation, offset etc.). The prototype system was created as an Autocad extension using Autolisp and DCL for user interface development.