Browse Prior Art Database

Head Suspension System For Flexible Disk Files

IP.com Disclosure Number: IPCOM000049417D
Original Publication Date: 1982-Apr-01
Included in the Prior Art Database: 2005-Feb-09
Document File: 2 page(s) / 50K

Publishing Venue

IBM

Related People

Bowen, AJ: AUTHOR [+3]

Abstract

The suspension system of Figs. 1 and 2 has read/write heads 4 mounted in gimbals 5 which provide axes in the roll and pitch directions of the heads. The gimbals 5 are mounted on relatively rigid pivot arms 6 and 7. These pivot arms transmit the normal load to the heads and allow head motion in the direction normal to the flexible disk 8. Therefore, the gimbals 5 allow pitch and roll motion while the pivoted arms 6, 7 allow normal translation of the heads. The load spring 9 applies equivalent normal loads to the read/write heads 4 as a result of applying the spring force between the two pivoted arms 6 and 7.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 54% of the total text.

Page 1 of 2

Head Suspension System For Flexible Disk Files

The suspension system of Figs. 1 and 2 has read/write heads 4 mounted in gimbals 5 which provide axes in the roll and pitch directions of the heads. The gimbals 5 are mounted on relatively rigid pivot arms 6 and 7. These pivot arms transmit the normal load to the heads and allow head motion in the direction normal to the flexible disk 8. Therefore, the gimbals 5 allow pitch and roll motion while the pivoted arms 6, 7 allow normal translation of the heads. The load spring 9 applies equivalent normal loads to the read/write heads 4 as a result of applying the spring force between the two pivoted arms 6 and 7.

The roll and pitch axes of the head are very close to the media. The applied moment to the head imparted by the frictional drag force at the head-disk interface then applies a very small pitch moment to the head. The frictional drag varies around the disk and from disk to disk. This feature then makes the performance of this suspension system less sensitive to this varying pitch moment. Also, the location of the pitch and roll axes near the head-disk interface produces a minimal amount of bit shift and off-track condition due to pitch and roll of the head.

The rigid arm of the suspension system effectively eliminates or greatly reduces the tangential offset and oscillations which cause bit shift in more flexible arm suspensions.

The gimbal suspension, as shown, is a dissipative system which has essentially no reso...