Based on the proposed structure mentioned above, the prototype of RS2 including hardware structure is explained. For the 1st to the 4th axis, the harmonic drives are adopted for reduction gears in order to support moment load at each axis. Specifically it is well known that harmonic drive has excellent characteristic with large torque to stiffness ratio. Especially for the 5th and 6th axes, belt reduction mechanism has been chosen instead of a reduction gear because their reduction ratios are just 1/2. All the servomotors are controlled by the servo drivers of Mitsubishi® J2-Super series. For the higher control system of RS2, the Motion Controller of NI PXI-7350 equipment has been used with the universal control/measurement software of LabVIEW