建议你看看你的步进电机说明书,偶这里给你推荐两期关于伺服、步进电机控制的擂台,里面的案例对你有参考价值:
http://www.gongkong.com/webpage/forum/201104/2011042919261600001-1.shtml
http://www.gongkong.com/webpage/forum/201101/2011012115134100003-1.shtml
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