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Actuator Friction and Bias Force Measurement

IP.com Disclosure Number: IPCOM000036924D
Original Publication Date: 1989-Nov-01
Included in the Prior Art Database: 2005-Jan-29

Publishing Venue

IBM

Related People

Authors:
Grundy, AJ James, DT [+details]

Abstract

In a disk file, a carriage supporting a connecting cable is driven by a linear voice coil actuator. This disclosure gives a technique for the separation of carriage friction from cable bias forces acting along the travel of the actuator. During testing, the force required to move the actuator through its entire travel in both directions is measured, giving two graphs of force against distance from which the friction and bias forces may be separated. This is possible because friction always acts against the direction of motion while cable bias acts in one direction only.