Browse Prior Art Database

Alignment Disk and Method

IP.com Disclosure Number: IPCOM000060586D
Original Publication Date: 1986-Apr-01
Included in the Prior Art Database: 2005-Mar-08

Publishing Venue

IBM

Related People

Authors:
Barr, ER Landolt, DG Logue, BK Moody, JD [+details]

Abstract

This article relates to an improved head-alignment disk, and to a method of using the disk to align the head(s) of a floppy disk drive, as the drive is being manufactured. In such a manufacturing process, the drive's head(s) is adjusted to the correct tangent position, correct radial separation (for a dual head carriage) and correct azimuth angle as the drive's head carriage is being manufactured as a subassembly. However, the carriage's radial position is later adjusted after the head carriage has been mounted on the disk drive. The disk provides a unique quad pattern of four radial-adjust data blocks, as shown in Fig. 1. The first two of these data blocks (10 and 11) comprise a symmetrical set of two blocks which are offset a distance X1 and X2 from track centerline 12 (here X1=X2).