This paper presents the results of an experimental setup for a position tracking system that is to control a working table to track a workpiece on a moving conveyor belt, such that the manipulator placed on the working table is able to operate upon the workpiece while the workpiece is still moving. The feedback control employs a reflective type optical sensor which is placed on the table, to measure the relative positions of the working table and the workpiece. A predictive method to compensate for the effect of sensor output saturation on tracking performance is investigated in detail. The application of this tracking control to industrial production lines to achieve a nonstop work flow may shorten overall manufacturing time, and therefore improve the production efficiency and increase the productivity.