针对光学电动位移台的精确控制要求,以ATMEG16A单片机为控制器,设计了一款位移台绝对位置寻址系统。位移台电机采用步进电机,其驱动器采用L293D,寻零开关采用KW6A微动开关,单片机通过IO口向L293D传送步进电机电平,实现位移台的精确移动,通过微动开关,可以固定位移台零位,实现绝对位置寻址。由位移台的重复定位精度测量结果可知,重复定位精度达25 μm,实现了位移台的绝对位置寻址精确定位控制。

Taking ATMEG16A micro control unit (MCU) as a controller, an absolute location address system is designed for the requirements of accurate controlling optical motor displacement platforms. A stepping motor is used as a displacement platform motor. L293D is used as a driver in the motor and KW6A micro switch is used as a searching switch for zero position. The electrical level of the stepping motor is transmitted to L293D by IO port on the ATMEG16A to realize the accurate movement of the displacement platform. The zero location of the displacement platform is fixed through the micro switch to find absolute location address. From the repeat positioning accuracy measurement results of the displacement platform, when the positioning accuracy reaches 25 μm, the accurate positioning control for the absolute position address of the displacement platform is realized.