Browse Prior Art Database

Ramp limiter with slope

IP.com Disclosure Number: IPCOM000013319D
Original Publication Date: 2000-Feb-01
Included in the Prior Art Database: 2003-Jun-18
Document File: 2 page(s) / 70K

Publishing Venue

IBM

Abstract

This discloses a ramp limiter with the slope(*1) that prevents a nose limiter(*2) of Head Gymbal Suspension (HGA) hooking on or hit ramp limiter for load/unload (L/UL)type Hard Disk Drive (HDD). There are no rooms on super small HDD like 1" HDD. By the effect on negative pressure head at unload, head retracts fluttering vertically. Therefore the nose limiter hits ramp limiter, and then head returns to disk. Or in the case of large Outer Crash Stop sway, nose limiter hooks on ramp limiter. In these two cases, actuator cannot release. By adding the taper to ramp limiter [Fig.2], these fatal errors can be avoided. It is confirmed that this slope works well by high speed camera [Fig.1].

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Ramp limiter with slope

        This discloses a ramp limiter with the slope(*1) that prevents a
nose
limiter(*2) of Head Gymbal Suspension (HGA) hooking on or hit ramp
limiter
for load/unload (L/UL)type Hard Disk Drive (HDD).

      There are no rooms on super small HDD like 1" HDD. By the effect
on
negative pressure head at unload, head retracts fluttering vertically.
Therefore the nose limiter hits ramp limiter, and then head returns to
disk.

Or in the case of large Outer Crash Stop sway, nose limiter hooks on
ramp
limiter. In these two cases, actuator cannot release.

      By adding the taper to ramp limiter [Fig.2], these fatal errors
can be
avoided. It is confirmed that this slope works well by high speed
camera
[Fig.1].

(*2)Nose Limiter (HGA)

Limiter (Ramp)

[Fig.1] Nose Limiter Motion at Retract

(High Speed Camera)

1

[This page contains 2 pictures or other non-text objects]

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Add Taper

Outer Crash

Stop

Side

Disk Side

Limiter

Fluttering vertically at unload

Hook

Hit

Side View

[Fig.2] Ramp limiter with Slope (*1)

2

[This page contains 1 picture or other non-text object]