On CNC Machining and Part Program Preprocessing Based on STEP-NC


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STEP-NC is a new CAM/CNC interface and an extension of STEP into numerical control machining. It has been partly formed into draft international standard (ISO 14649) and is expected to replace ISO 6983 in the near future. In the first section of this paper, the STEP-NC data model is analyzed and those parts that are relevant to NC milling process are abstracted. Then issues involved in NC part machining based on STEP-NC paradigm are discussed including NC programming and the machine control. Based on the analysis, a prototype system is outlined and partly developed with libraries and software tools in ST-Developer environment to interpret the part program into internal data format and to assist the shop floor level planning. Finally the user interface of this system is introduced.



Materials Science Forum (Volumes 471-472)

Edited by:

Xing Ai, Jianfeng Li and Chuanzhen Huang




C. R. Zhang and R. L. Liu, "On CNC Machining and Part Program Preprocessing Based on STEP-NC", Materials Science Forum, Vols. 471-472, pp. 326-329, 2004

Online since:

December 2004




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[4] ISO: Data model for Computerized Numerical Controllers (ISO/FDIS 14649, 2000). Fig. 5 Dialog box for geometrical information Fig. 6 Dialog box for technological information.