Browse Prior Art Database

Head Load, Unload Method

IP.com Disclosure Number: IPCOM000104594D
Original Publication Date: 1993-May-01
Included in the Prior Art Database: 2005-Mar-19
Document File: 2 page(s) / 47K

Publishing Venue

IBM

Related People

Aoyagi, A: AUTHOR [+3]

Abstract

This disclosure describes a method to load and unload a recording head from a disk surface in a hard disk drive without changing of roll angle.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 83% of the total text.

Head Load, Unload Method

      This disclosure describes a method to load and unload a
recording head from a disk surface in a hard disk drive without
changing of roll angle.

      Figs. 1-4 show an example of this method.  When the head flies
over the data zone (Fig. 1), the head-loader is fixed close to the
actuator by a spring or a flapper.  Then the head moves near the
crash-stop zone, and the actuator arm contacts with head-loader (Fig.
2), and the loader starts moving towards slider side (Fig. 3).  The
clearance between suspension and loader becomes smaller and smaller
when the loader moves towards the slider, and the top-side of loader
contacts with the suspension, after which the head starts to lift
from the disk surface (Fig. 4).

      Fig. 5 shows the way to control the load/unload timing.  To fix
the dimple or Rib under the suspension, speed and timing of
load/unload are changed flexibly by changing dimple position and
height.  If the loader move into the space between suspension and
disk surface from the side of suspension (Fig. 6), the danger of
contact between another side of head and disk surface is increased
because of suspension twist.  To remove the Head without changing the
roll-angle, the loader has to move along suspension as follows:

      When the Actuator moves towards the Inner crash-stop, the
actuator arm contacts with the loader.  Then, the actuator moves
further towards the inner zone, with the actuator-arm pushing again...