This paper details the design and implementation of a wheeled mobile robot, which will be referred to as Mobius (Mobile Vision Autonomous System), for selfsustained indoor operation. Its rugged design enables it to be easily customised with auxiliary equipment providing a wide application base. This is facilitated by an accurately controlled high power drive system, with onboard power and computational sources, giving much improved performances and capabilities comparable to that of commercially available devices in the same price bracket. The mechanical and electrical design of the robot are presented, optimised for cost and performance. The remainder of the paper concentrates on the design and implementation of an accurate drive controller