Browse Prior Art Database

Head To Floppy Disk Interface Measurement

IP.com Disclosure Number: IPCOM000048026D
Original Publication Date: 1983-Nov-01
Included in the Prior Art Database: 2005-Feb-08
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Billman, JW: AUTHOR [+3]

Abstract

A glass head simulates the magnetic recording head of a floppy disk drive. This head is loaded into the floppy disk, in the manner of the actual head, and the optical interference pattern which is produced is observed as a measure of the type of compliance which is being achieved between the head and the floppy disk.

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Head To Floppy Disk Interface Measurement

A glass head simulates the magnetic recording head of a floppy disk drive. This head is loaded into the floppy disk, in the manner of the actual head, and the optical interference pattern which is produced is observed as a measure of the type of compliance which is being achieved between the head and the floppy disk.

In this procedure, the glass head is first mounted in a simulated floppy disk drive. The top surface of this glass head has the same contour as the magnetic head, for example, spherical. A transparent optical flat is now positioned to locate the crown of the head. The point of contact between the optical flat and the glass head is now observed by the use of a TV monitor.

A transparent overlay is now positioned on the face of the TV monitor. This overlay carries a pattern which is used to inspect the compliance zone of the head-to-disk interface. The overlay is now moved to cause the center of the pattern to be positioned coincident with the above-mentioned point of contact of the optical flat to the glass head. The TV overlay is now properly positioned.

Next, the optical flat is removed, and the floppy disk is put in place. Then the head load arm/pad is inspected across all tracks with the disk rotating. The TV monitor shows the compliance of the floppy disk to the glass head where it can be compared to the above-mentioned inspection pattern on the TV overlay.

Anonymous

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