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Smooth Entry and Parking Well Profile for a Hard Disk Drive Load/Unload Ramp

IP.com Disclosure Number: IPCOM000014677D
Original Publication Date: 2001-Aug-01
Included in the Prior Art Database: 2003-Jun-20
Document File: 1 page(s) / 39K

Publishing Venue

IBM

Abstract

Disclosed is a Load/Unload Ramp Profile for a disk drive application which reduces head/suspension vibrations during crashstop impacts and also reduces ramp wear. Referring to Fig. 1, the disclosed ramp design (18) has generous radiuses (R) that are larger than the curvature of the load/unload tabs (3) and (4). The generously radiused transitions between surfaces 5-7, 7-9, 9-11, 11-13, 13-15, 15-17, 6-8, 8-10, 10-12, 12-14, 14-16, and 16-18 reduce head/suspension vibrations during crashstop impacts and cause a gentle loading of the heads (1) and (2) onto the disk (19) surfaces, whereby they reduce the probability that the heads will produce dings on the disk surface. Also, an additional advantage of having the generously radiused transitions (R) is the elimination of 10 out of 11 "bang" points which can lead to excessive ramp wear. Fig. 2 shows the "bang" points for a prior art ramp 5 bang points during head "loading" and 6 bang points during head "unloading"). 1

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Smooth Entry and Parking Well Profile for a Hard Disk Drive Load/Unload Ramp

   Disclosed is a Load/Unload Ramp Profile for a disk drive application which reduces head/suspension vibrations during crashstop impacts and also reduces ramp wear.

   Referring to Fig. 1, the disclosed ramp design (18) has generous radiuses (R) that are larger than the curvature of the load/unload tabs (3) and (4). The generously radiused transitions between surfaces 5-7, 7-9, 9-11, 11-13, 13-15, 15-17, 6-8, 8-10, 10-12, 12-14, 14-16, and 16-18 reduce head/suspension vibrations during crashstop impacts and cause a gentle loading of the heads (1) and (2) onto the disk (19) surfaces, whereby they reduce the probability that the heads will produce dings on the disk surface.

   Also, an additional advantage of having the generously radiused transitions (R) is the elimination of 10 out of 11 "bang" points which can lead to excessive ramp wear. Fig. 2 shows the "bang" points for a prior art ramp ( 5 bang points during head "loading" and 6 bang points during head "unloading").

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