Browse Prior Art Database

Flat Cable Connection for Capacitive Displacement Measurement

IP.com Disclosure Number: IPCOM000089599D
Original Publication Date: 1977-Nov-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Beye, B: AUTHOR

Abstract

During the test of a disk file for the flying characteristics of a test head/arm assembly in an actual disk pack, a test slider is outfitted with capacitive probes that are connected to a capacitive displacement meter. The probes measure the head-to-disk compliance.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 1

Flat Cable Connection for Capacitive Displacement Measurement

During the test of a disk file for the flying characteristics of a test head/arm assembly in an actual disk pack, a test slider is outfitted with capacitive probes that are connected to a capacitive displacement meter. The probes measure the head-to-disk compliance.

A flat cable is provided as an interconnection between the head/arm assembly and the capacitive displacement meter. The flat cable is wired such that all signal-carrying conductors are paired with a one-end-only grounded conductor. The stray capacitance of the interconnection remains constant as thusly wired. The flexing of the flat cable during accessing does not change the total capacitance. Thus, all change in the capacitive displacement meter reading is the result of the capacitive probes in the slider and is not the result of the changing cable capacitance resulting from different accessing positions of the head/arm assembly.

1