The requirement was to design, manufacture and test a prototype of a printing ink refilling machine. The machine is used to refill inkjet printer cartridges of different volumes and containing up to four different color inks. The user enters the colors and the volumes to fill on a keypad and display interface and the electronic controls do the rest using a combination of embedded systems and a electromechanical arrangement. The project involved linear actuators, pistons, valves, display and keypad interfaces etc. The prototype has since then gone into production and has been in production for many months. Hundreds of units have been built based on the prototype and are functioning as originally required by the client.