Currently, there is a rapid and constant development of the ability to manufacture machines and devices. With the help of CAX programs, can create complicated elements quickly and easily. The production and use of 3D scanners is also developing intensively. There is growing interest in reverse engineering to obtain documentation of existing components. The 3D model can be processed and edited using CAX programs. A complete object can be obtained without the help of touch methods, using professional scanners, self-made scanners, cameras, and even a mobile phone with a camera. The article describes the possibilities of building 3D scanners, their accuracy has been checked, as well as the possibilities of scanning for the reconstruction of machine parts.