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Micro-Stepping Mechanism for Floppy Disk Servo

IP.com Disclosure Number: IPCOM000064194D
Original Publication Date: 1985-Jun-01
Included in the Prior Art Database: 2005-Feb-18

Publishing Venue

IBM

Related People

Authors:
Nassimbene, EG [+details]

Abstract

It is generally agreed that if higher track densities are to be achieved above the densities in present floppy disk drives, it will be necessary to utilize some type of servo-mechanism. It is also agreed that the increase in cost to add the servo must be extremely low. There are two main approaches to servo control. One is to use a linear voice coil which has enough throw to be able to move the head to all the tracks and which is able to adjust the head at each of the tracks to any variations the track might have. The other approach is to use a stepping motor to move the head to the various tracks and to add a second mechanism, a micro-adjuster, to move the head slightly to follow track variations. This disclosure teaches a way of using a stepping motor to do both functions, i.e.