High precise positioning control for block spring motor

Abstract

Nanotechnology is based on a combination of many technologies such as high precise positioning and force control, especially magnetic recording, biotechnology and semiconductor industry require the utilization of nanotechnology. To date, various actuator systems have been proposed, but their structural models show working distances of either less than a millimeter or over ten millimeters. Structural models with working distances of several millimeters are rare. Therefore, we propose a new structural design of an actuator that would enable construction of actuator systems with such working distances. This new actuator consists of a voice coil motor (VCM) and a new guide with an elastic support mechanism (ESM). The ESM consists of a special spring which is restricted to moving in only one direction. This new ESM engenders no lost motion, mechanical play, or friction with motion. Because, characteristically, the VCM thrusts and displaces the ESM linearly, highly precise positioning and force control can be realized using a simple controller. This paper presents basic data for developing future nano-actuator systems. © 2008 IEEE.