本标准定义了数控机床的机床坐标系和运动术语。它旨在消除制造商、程序员和机床用户之间的误解，简化编程，促进类似配置机器之间记录数据的互换性，并通过机器坐标系和运动术语的标准化简化程序员的培训。本标准定义了机床坐标系和机床运动，以便机床程序员能够描述加工操作，而无需知道刀具是否接近工件或工件是否接近刀具。 本标准中包含的规则是在私营行业和政府的合作下制定的，并基于广泛接受的行业惯例和用法。它们还部分基于国际机床市场使用的标准。本标准由IE-31数控系统和设备委员会编制，并由工程部执行委员会（EDEC）批准。

This Standard defines a machine coordinate system and motion nomenclature for numerically controlled machines. It is intended to eliminate misunderstandings between manufacturers, programmers, and users of machine tools, to simplify programming, to facilitate the interchangeability of recorded data between machines of like configuration, and to simplify the training of programmers by the standardization of machine coordinate system and motion nomenclature. This Standard defines a machine coordinate system and machine movements so that a machine tool programmer can describe machining operations without having to know whether the tool approaches the workpiece or the workpiece approaches the tool.The rules contained in this Standard were developed with the cooperation of private industry and Government and are based on widely accepted industry practice and usage. They are also based, in part, on standards used in the international machine tool market.This Standard was prepared by the IE-31 Committee on Numerical Control Systems and Equipment and approved by the Engineering Department Executive Committee (EDEC).