In order to meet the requirements raised by the surface strengthening and rolling technology of torsion shafts on heavy-duty armored vehicles, an open CNC system, based on PMAC, is developed. The paper covers a detailed description of its hardware and software. Experiments show that the introduction of rolling shafts processed by CNC rolling machines not only improves the surface roughness and abrasion resistance, but also raises endurance strength and production efficiency. Introduction

PMAC motion controllers serve not only as a receiver of the orders from CNC systems of many kinds, but also as a controller of the motion of machine tools’ axles. With G83 as an example, a code commonly seen in the processing cycle of deep holes in CNC machining centers, it is advisable to come up with a method to write a special set of subprograms to invoke PMAC motion controllers with the application of G-code. Based on the method, case programing and machining simulation can be launched. Experiments justify that the method obtained can realize the compiling of fixed cycles with the use of G-code and, in turn, boast substantial significance in the development of open CNC processing machine tools.