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Kinematic Spray Lubricator for Magnetic Disks

IP.com Disclosure Number: IPCOM000051847D
Original Publication Date: 1981-Mar-01
Included in the Prior Art Database: 2005-Feb-11
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Eik, WA: AUTHOR

Abstract

This technique applies a uniform lubricant layer over the surfaces of either thin film- or oxide-coated disks. The machine for carrying out the technique includes slide mechanisms carrying spraying and wiping devices for applying an atomized lubricant spray to the disk and for wiping the disk surface.

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Kinematic Spray Lubricator for Magnetic Disks

This technique applies a uniform lubricant layer over the surfaces of either thin film- or oxide-coated disks. The machine for carrying out the technique includes slide mechanisms carrying spraying and wiping devices for applying an atomized lubricant spray to the disk and for wiping the disk surface.

The machine is designed to spray and wipe at constant surface velocity, thereby maintaining extreme consistency of the process. This is achieved by mechanically coupling the spray and wipe slides to the spindle which drives the vertically held rotating disk to achieve a constant horizontal feed rate per unit disk revolution. Constant surface velocity is maintained by varying the spindle speed with respect to slide position. This is expressed mathematically as an in verse function: RPM = K1 over R where K = constant and R = disk radius.

This is achieved by modifying the slides' linear transducer output with a cam of the shape RPM = K1 over R. The RPM is then changed by a servo motor on a continuously varying transmission.

The following are advantages of the new machine compared to existing equipment: 1. Constant surface velocity processing permits an extremely even layer of lubricant. a. Use of an atomizing spray for the lubricant further reduces effect of minor machine speed variations. b. Equalizing tape pressure rolls allows the wiping or polishing of the disk surface within 25% of theoretically best surface speed. 2....