软件开发是软数控系统开发的核心和关键。
Software development is the core of software CNC system development.
文中重点讨论了此类软数控系统中脉冲时间间隔的控制问题以及端口脉冲发送的计算方法和技巧。
The focus is placed on the controlling of the time interval of the two pulses which are send to stepping-motor drivers and the calculation f the output - number for bits on the I/O card.
文章介绍了一种不添置任何硬件直接利用PC并行口控制的数控系统的设计，并说明了系统的软、硬件的设计方法。
This article puts forward a design in which NC system is operated by LTP of PC and as well describes the way to design its software and hardware.
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