Computer Numerically Controlled (CNC) LABORATORY The DIME labs also include a Computer Numerically Controlled (CNC) lab. This lab is used to hold lab sessions on this subject and also to machine parts required for students’ projects and from other requestors at university. In this lab, copper electrodes required for the die sinking machine are also machined. The lab facilities include two vertical milling machines: Bridgeport Series 1 Interact with a Heidenhain TNC 145 controller (2.5 axis) and a Cincinnati Arrow 500 vertical machining centre with Siemens Acramatic 2100 controller (3 axis). There is also a high speed attachment that can provide a spindle speed of 25000 rpm. Such speeds are required to provide optimum cutting conditions when using small cutters.