Sorry for the poor quality.
This 6-axis robot arm contains 2 RCX units and only 4 Motors (2x 9V and 2x 9V Power). The functions are covered by switching the motors’ axes to different parts of the arm using gearbox components and pneumatics. Thus, only three degrees of freedom are available at max at the same time and a constant supply of pressure is needed. Yet on the upside, the arm can be operated with much less ressources. The upper part (above the base’s turntable) has a total weight of 1.7 kg (including batteries).
This video will be first of a few featuring this robot as it has a few other features not yet shown in the video.
Related components of the arm:
Double valve: //youtu.be/TfxcSaOKXM0
Scout remote control: //youtu.be/H9gg63_WJnQ