In this paper, we deal with the reconstruction of the Cartesian coordinate robot. The need for the reconstruction itself came about due to the obsolescence of the equipment and the user interface that had been implemented on the robot for several decades and are no longer used anywhere in the industry today. The work will cover three large chapters through which the reconstruction of the robot itself was carried out: I. Selection of new equipment II. Implementation of new equipment on the robot III. Programming the robot and preparing it for further development The first part will show and describe new and also outdated robot equipment. The specifications of each component will be described in detail, and at the end, all the components of the obsolete equipment, which are being replaced, will be compared with the new components. The second part will describe the implementation of new components on the existing robot. Their positions will be shown and the reason and method of implementation will be explained. In addition to installing the components, it is also necessary to connect them electronically. You can see the electronic connection schemes in the appendices at the end of the paper, and you can read the description of the connection in chapter 3. The last part of the reconstruction of the Cartesian coordinate robot includes the programming of the robot itself. In chapters 4 and 5, you can see a detailed description and presentation of the programs needed to prepare the robot for work, as well as for further development. The robot is located in the Laboratory for the design of manufacturing and assembly systems and after the completion of the reconstruction, it is used for further educational purposes.