System and method to minimize bearing pivot effect in disc drive actuator
AssigneeSeagate Technology LLC
InventorsXiong Liu, Joseph Cheng-Tsu Liu, Choon Kiat Lim, Kevin Arthur Gomez
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Abstract
A disc drive is provided which incorporates a rotatable actuator which is mounted to a base of the disc drive through a pivot mechanism. The actuator positioning is controlled by a servo system and during track following operations, the actuator arm is caused to move. In one embodiment, the servo tracks incorporated in the disc drive are distorted when written in by the injection of a sinusoidal signal. In another form, the disc containing the servo information is caused to rotate about an axis which is offset from the disc axis. A method of creating a servo track is also disclosed.
Claims20
A disc drive comprising:
- a drivable spindle,
- a disc rotatably mounted about an axis of a spindle, the disc including at least one data storage track,
- a rotatable actuator assembly which is rotated in conjunction with a pivot mechanism, the rotatable actuator assembly includes an actuator arm and a transducer mounted on the actuator arm;
- and
- a motor that operates the actuator assembly to position the transducer over the at least one storage track, wherein purposefully induced eccentricity is provided between the at least one storage track and the axis of the spindle.
A method of retrieving data from or storing data to a data storage track on a rotating disc of a disc drive, the method including a step of causing a rotatable actuator assembly to pivot about a pivot mechanism responsive to intentionally generated eccentricity.
A method for at least one of reading and writing a servo track on a rotating disc of a disc drive, the servo track defining a center line of a data storage track on the disc of the disc drive, the method including steps of:
- providing an actuator assembly having a transducer for at least one of reading and writing the servo track on the rotating disc;
- providing a motor operatively connected to the actuator assembly and operable to move the transducer in response to an input signal;
- and
- providing a time variable input signal to the motor to cause the transducer to move during at least one of reading and writing of the servo track, the time variable input signal associated with purposefully caused eccentricity.
Dependencies are inferred from the claim text.