步进电机在具有一定转换方向的驱动脉冲下运行，据此将步进电机驱动器划分为方向控制和逻辑输出两个部分。限位信号用于复位和限定运行方向，因此在方向控制部分同时处理限位；在逻辑输出部分，按照控制需求再次划分为复位、自动和手动三个逻辑处理模块，在逻辑输出的实现方式上，复位、自动和手动通过一定的优先级逻辑，通过发送电机占用请求复用逻辑输出模块。

爬山复位模块用于复位调焦镜头到爬山搜索的起始位置。步进电机驱动器在捕获到指令单元的复位信号后，按预定的运行方向产生驱动逻辑，直至控制器收到限位信号LIMIT的有效反馈后停止。复位过程中，自动和手动请求无效。

步进电机驱动器的步数数据接收端DATA在接收到指令单元传入的运行步数后，首先检查当前是否有其他电机占用请求，如果电机空闲，就按照同时传入的方向信号输出指定步数的驱动逻辑；否则忽略本次自动控制请求。

手动微调在驱动器中作为一种辅助控制手段，允许人工微调调焦镜头的位置。每启动一次手动微调，电机就按照设定的运行方向，运行一段固定的微调距离。驱动器在捕获到手动输入信号后，同时读取手动运行方向DIRECTION的设置值，如果当前电机空闲，则按照手动输入的方向信号输出固定步数的驱动逻辑；否则手动请求无效。

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厦门仲鑫达自动化设备有限公司
欧阳英（销售经理）
移动电话：13394057292
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