An X-Y Table Control System using the Dual Loop PLL Motion Controller

Abstract

PLL is used for many electronic equipments, and effective in motion control as well, to provide high level of speed and position accuracy. A problem with PLL control is “cycle slip” in cases with rapidly changing speed, leading to large phase error to cause harmful vibrations. We propose prevention method for this problem, using “multi-state” phase detector is proposed. Larger input range than usual 3-state detector can absorb transient slips. Its effectiveness is confirmed with simulation and experimental results. In this article, We try to apply this system to X-Y table including bi-direction acceleration.