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Browse Prior Art Database

Compact Dual Actuator Assembly

IP.com Disclosure Number: IPCOM000100587D
Original Publication Date: 1990-May-01
Included in the Prior Art Database: 2005-Mar-15
Document File: 2 page(s) / 77K

Publishing Venue

IBM

Related People

Mathurin, E: AUTHOR [+4]

Abstract

This article describes a method for achieving graularity in a disk file (HDA) so that a range of actuator configurations can be used. Thus, a basic file structure with a given number of disks and fixed spindle configuration can be made compatible with anywhere from multiple single-arm actuators to multiple four-arm actuators. In the designs below, a difficulty arises in an accurate and uniform method of supporting the actuators while satisfying a set of diverse requirements related to manufacturing and other functions of the actuator. The following description attempts to solve these requirements.

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This is the abbreviated version, containing approximately 67% of the total text.

Compact Dual Actuator Assembly

       This article describes a method for achieving graularity
in a disk file (HDA) so that a range of actuator configurations can
be used.  Thus, a basic file structure with a given number of disks
and fixed spindle configuration can be made compatible with anywhere
from multiple single-arm actuators to multiple four-arm actuators.
In the designs below, a difficulty arises in an accurate and uniform
method of supporting the actuators while satisfying a set of diverse
requirements related to manufacturing and other functions of the
actuator.  The following description attempts to solve these
requirements.

      In the past, high-end DASD files consisted of 14" diameter
disks and large rotary or linear actuators.  The linear actuators
were usually opposed to reduce interaction of the heavy carriages
from each other.  Because of the large HDA size, the number was
usually two HDAs per box, resulting in high use of premium floor
space.  The current trend is for smaller disks and more compact HDAs,
more economical use of floor space, and design for automated assembly
with few or zero adjustments.  This compact, high performance, dual
actuator assembly helps to achieve this.

      The two-part bracket assembly 19 and 20 (see the figure)
enhances this design allowing the two actuators 17 and 18 shown, or
any multiple combinations as described above, to be assembled as a
single unit.  This multiple configuration can be assembled...