This article introduces the method to the material car automatic control, The computer implements real time control by controlling storage bin of the automatic warehouse and improve the management standards of automatic warehouse.%介绍运料小车自动往返控制的硬件设计，采用交流电动机、变频器和编码器组成的交流变频闭环调速系统，对位移和速度进行精确控制等。
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