公开(公告)号：WO1997039450A1

公开(公告)日：1997-10-23

申请号：PCT/US1997006140

申请日：1997-04-14

Applicant: PHASE METRICS

Inventor： PHASE METRICS ,  BAKER, Bill, R.

IPC: G11B21/10

CPC classification number: G11B5/48 ,  G11B21/106

Abstract: A non-contact servo writing system positions a hard disk drive transducer. A light source (72) mounted on a master assembly's master arm (54) reflects light off a reflector (66) mounted on the hard drive arm (58). A sensor (76) mounted on the master arm generates a signal proportional to the amount of reflected light received from the reflector. A servo controller (70) coupled to the sensor controls hard drive arm movement according to the signal generated. In one embodiment, the sensor comprises a circuit having first and second photosensing elements. The circuit generates first and second signals proportional to the reflected light amount received by the first and second photo sensing elements respectively. The sensor also provides a sensor output signal, used by the servo controller to move the hard drive arm, representative of the difference between the first and second signals, and of disk drive arm position with respect to the master arm.

Abstract translation: 非接触伺服写入系统定位硬盘驱动器换能器。 安装在主组件的主臂（54）上的光源（72）将光从安装在硬盘驱动器臂（58）上的反射器（66）反射。 安装在主臂上的传感器（76）产生与从反射器接收的反射光量成比例的信号。 耦合到传感器的伺服控制器（70）根据产生的信号来控制硬盘驱动臂的移动。 在一个实施例中，传感器包括具有第一和第二光敏元件的电路。 该电路分别产生与由第一和第二感光元件接收的反射光量成比例的第一和第二信号。 该传感器还提供传感器输出信号，由伺服控制器用来移动硬盘驱动器臂，代表第一和第二信号之间的差异，以及相对于主控臂的磁盘驱动器臂位置。