M.Ing. / A large number of machine tools in use today are worn and can not produce the correct tolerances as a result of the inaccuracy of the structure. A device was developed to assist in the solution to the problem. The study of the development of this device includes several different fields. An entire prototype scale model of a grinding device is developed, with components including a control system and a developed sensor. The control system consists of circuitry and programming. The programming has been done in Visual Basic. The circuitry includes driver circuits for DC motors as well as pulse width modulation circuits and filters, amplifiers and comparators for the newly developed sensors. The sensor developed is an optical device, which can sense the deviation of a cable for reference for the movement of the device. A combination of the above components into a unit and the provision for factors, such as grinding forces and vibrations, which influence the operation of the device, are presented. Furthermore, an analytical model is suggested for the prediction of the system's behavior.