UDC 621.941.08:62-5 © Silviya Salapateva, Iliya Chetrokov, Vasil Georgiev INTELLIGENT COMPUTER CONTROL OF PRECISION AT TURNING This paper represents a model for overall decrease of the inaccuracies forced by accidental and systematic factors during turning with CNC lathe. <...> The presented method does not elaborates the sensor system of the machine. <...> Through computer processing of the database and the information from the control of the work pieces and the processed detail, the control of the CNC system is executed. <...> INTRODUCTION At the end of the 20th century the development of the scientific knowledge of the process of mechanical processing, of the information technologies, the computer technology and the metal-cutting machines has reached a level, giving an opportunity for a qualitatively new approach in controlling the process. <...> It is based on integrating the knowledge of the process, presented as a database, with the adaptive control (AdC) in real time on carrying out the processing also with an active control (AcC) following the operative control for completing the database and self-training of the system. <...> These modern systems became popular as “Intelligent computer control” [1, 2]. control with active control, without complicating the sensor system of the machine. <...> The system’s modules are: – a control module, including work pieces control before the proces sing and detai ls control after processing. <...> The work pieces control data is received in the adaptive control block, while the details control data – in the active control block; – a module for process realization, including the metal-cutting machine and the CNC system; – a computer control module, car rying out the creation of the control program and fulf illing the process control in communication with the CNC system. <...> This module combines algorithms for precision control according to the results of the details control after processing (active control after processing – ACAP) with algor ithms for adaptive control of precision (ACP) according to the results of the control of the work pieces which enter for processing. <...> It is based on a computer system, in which is created a database and is installed a specially developed software for carrying out adaptive control and active control, as well as for generating control programs and for communication with the CNC system. <...> Under these conditions, the statistical characteristics of the technological process should be determined dynamically in Fig. 1. <...> PRECONDITIONS AND MEANS FOR SOLVING THE PROBLEM The expansion of the application sphere of the CNC metal-cutting machines <...>