Stepper motors are used widely in numeral control system with the characteristics of high speed starting and stopping, accurate stepping, directly receiving numeral quantity.
步进电机因其快速启停、精确步进、直接接受数字量等优点，在数控系统中得到广泛应用。
The design and project of numeral control chart are put forward, and the composing of system, functional structure and methods of realization are discussed also in this paper.
提出数字化控制图系统的设计方案，并讨论系统的组成、功能结构以及具体的实现方法。
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