Browse Prior Art Database

Read/ Write Track Lateral Alignment

IP.com Disclosure Number: IPCOM000048860D
Original Publication Date: 1982-Apr-01
Included in the Prior Art Database: 2005-Feb-09
Document File: 2 page(s) / 33K

Publishing Venue

IBM

Related People

Argumedo, AJ: AUTHOR

Abstract

Precise lateral alignment between the read and write head modules is obtained by placing one of the modules against a fixed datum pin while placing the second module against an adjustable datum pin. An electromagnet holds the modules during the alignment. A microscope is used to find the track on the read module. The microscope is then translated to the write track and the write module is adjusted accordingly such that the elements for the tracks are in line.

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Read/ Write Track Lateral Alignment

Precise lateral alignment between the read and write head modules is obtained by placing one of the modules against a fixed datum pin while placing the second module against an adjustable datum pin. An electromagnet holds the modules during the alignment. A microscope is used to find the track on the read module. The microscope is then translated to the write track and the write module is adjusted accordingly such that the elements for the tracks are in line.

In the figure, the ferrite head module 1 is held in place by an electromagnet 2 which includes a coiled structure 3. A magnetic force is induced by the electromagnet 2 to hold the ferrite head in place when the DC power supply 4 is activated. The electromagnet provides an alignment surface for the ferrite head
1. The use of a magnetic datum causes rapid and accurate assembly of the separate read and write modules. A microscope 5 is used to view the track from each of the read and write modules in the ferrite head 1. An adjustable datum pin 6 is placed in contact with one of the modules, preferably the write module.

In using this tool for assembling a head, the head housing 7 is clamped in place on the tool. The read/ write modules 1 are held in scope 5 is then used to accurately determine the read track of the read module. The microscope is then translated to the corresponding write track on the write module. An initial measurement of the read track to write track center l...