High resolution technology for encoders with high speed response and its method of eliminating errors which are suitable for positioning control by Linear motors

Abstract

It is considered that encorders which are used for positioning control of motors representing Linear motors are improving on the resolution year by year in order to obtain higher positioning accuracy.
However, increasing the resolution and increasing the traveling speed are contradicted each other due to the characteristic of encorders. In general, when the resolution is pursued, traveling speed has to be sacrificed.
To overcome this problem we represent the high resolution technology for encorders which is compatible with high speed response and not affected by various speeds. And we also represent new method of rectifying positioning errors which enable us to obtain high accuracy relating with high resolution of the encorder.
It is considered that these newly introduced methods can be utilized for high speed positioning control which is represented by a Linear motor drive.