The physic layer and the software layer of the open NC systems layering and modeling design,the characteristic and the open characteristic of CJK6132A lathe Close-loop NC system are introduced.

• 对开放式数控系统进行层次模块化设计：物理层、软件层设计。介绍了CJK6132A车床闭环数控系统的特点及开放性。