An automatic tool changer or ATC is used in computerised numerical control (CNC) machine tool to improve the production and tool carrying capacity of the machine. ATC changes the tool very quickly, reducing the non-productive time. Generally, it is used to improve the capacity of the machine to work with a number of tools. It is one more step towards complete automation. Simple CNC machines work with a single tool. But if we require even more number of tools, then ATC is provided. But many ATC manufacturing companies makes ATC starting with minimum 12 number of tools. Because of that small scale industries are not able to upgrade their CNC machines with ATC because of high cost due to more number of tools and also no use of that much number of tools. Especially in CNC router machine which is mostly used by sculptures to carve on the different things. In which they need just basic tools that is minimum 4 to 6 tools.