Disk centering method and apparatus for centering disks for disk

Details Disk centering method and apparatus for centering disks for disk Disk centering method and apparatus for centering disks for disk

1989-02-24

1990-06-12

Stephan, Steven L.

Dynamic information storage or retrieval

Dynamic mechanism subsystem

Specific detail of storage medium support or motion production

29406, 33644, 360 9808, 360 9912, G11B 2300, G11B 2504

Patent

active

049339273

ABSTRACT:
A method of centering a disk on a disk drive motor with respect to the rotational axis of the motor and/or for balancing the disk to reduce operating vibration of the disk and motor assembly. The centering/balancing method is performed by placing a contact element in contact with the outer diameter of the disk and moving the contact element towards the rotational axis of the motor until the inner diameter of the disk contacts a portion of the hub of the motor which protrudes into the center hole of the disk. Then, the disk is rotated while the contact element is simultaneously moved away from the rotational axis of the motor at a rate related to the rotational speed of the disk. An apparatus for performing the centering/balancing methods includes an element for contacting the outer diameter of the disk, and a mechanism for moving the contact element towards the rotational axis of the motor until the inner diameter of the disk contacts the portion of the hub protruding into the hole in the disk and for simultaneously rotating the disk and moving the contact element away from the rotational axis of the motor at a rate related to the rotational velocity of the disk.

REFERENCES:
patent: 3477727 (1969-11-01), O'Connell
patent: 4125883 (1978-11-01), Rolph
patent: 4689782 (1987-08-01), Tsuchiya et al.
patent: 4709283 (1987-11-01), Kitahara et al.
patent: 4764828 (1988-08-01), Gollbach
patent: 4797873 (1989-01-01), Nobutani
patent: 4825314 (1989-04-01), Maekawa et al.
patent: 4839880 (1989-06-01), D'Alayer de Costenore

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