Browse Prior Art Database

Method for Dynamic Balance of Hard Disk File Disk Pack

IP.com Disclosure Number: IPCOM000119444D
Original Publication Date: 1991-Jan-01
Included in the Prior Art Database: 2005-Apr-01
Document File: 1 page(s) / 41K

Publishing Venue

IBM

Related People

Baker, RE: AUTHOR [+2]

Abstract

Disclosed is a method of dynamic balancing a hard disk file disk pack which uses adhesive backed weights that are applied directly to the top surface of the top disk and bottom surface of the bottom disk of a disk pack.

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This is the abbreviated version, containing approximately 100% of the total text.

Method for Dynamic Balance of Hard Disk File Disk Pack

      Disclosed is a method of dynamic balancing a hard disk file
disk pack which uses adhesive backed weights that are applied
directly to the top surface of the top disk and bottom surface of the
bottom disk of a disk pack.

      This method of dynamic balancing a hard disk file disk pack
uses adhesive backed weights 1 and 2 (see the figure), which are
applied directly to the top surface of the top disk 3 and bottom
surface of the bottom disk 4 of a disk pack 5.  These surfaces of the
disk pack are not used for recording or servo purposes.

      The balance correction needed for the disk pack is measured
using a balance testing fixture, which gives the angular location of
the correction as well as the amount of correction (the amount of
correction can be varied either with different weights or different
radii of application).

      Pre-cut patches of the appropriate sized weights are applied at
the measured angles 6 and 7, needed to balance the disk pack.
Weights are applied to both the top surface of the top disk and the
bottom surface of the bottom disk in order to achieve a dynamic
balance of the disk pack. Weights consist of aluminum disks with
acrylic adhesive applied to one side.  Weights can be applied
directly to the disk surfaces with only a small pressure, and require
no cleaning or other debris generating preparation.

      Disclosed anonymously.