These are not very common for DIY projects due to their expense. Industrial OEM CNC Controllers are the ones used on Industrial CNC Machines like Haas. Types of CNC Controllers Industrial OEM CNC Controllers Choosing the Best CNC Controller for Your CNC Machine.In this article, we’ll break it down along several dimensions each of which you can then drill down on further: The controller with its CNC Control Software and electronics are the most complex part of a CNC Machine. The CNC Controller or CNC Control is the package of electronics and software that take input either from g-code or the cnc control panel and converts it to the signals the CNC machine’s motors need to move the CNC axes. CNC Controller: Software, Drivers, & Boards