Disk Drive Actuator Lock With Low Power Hold Circuit
Original Publication Date: 1989-Apr-01
Included in the Prior Art Database: 2005-Jan-29
The actuator lock is designed to hold the actuator of a disk drive in the head landing zone at power-down to prevent damage to data areas of the disk. At power-up when the disk has attained the proper rotational speed, the lock is "picked" and moved to the hold position where it does not interfere with the actuator during normal operation. When the lock is stabilized in the hold position. The magnetic circuit and the mechanical hardware are designed such that the lock will safely maintain this hold position at the lower current under all vibration and operating conditions.