Like his predecessor, Golia II was built to attend a robotic Sumo challenge during a Legofest, where he resulted second among four competitors.
Golia II's main features are:
Front view. The blue levers activate the gear switch and the electric switch.
Top view. If look at the right wheel (up in the foto) you can see that part of the gearing is inside the wheel itself.
In this picture the RCX and the actuator of the gear switch have been removed. It's easy here to understand the basic structure of the robot and identify the role of the motors. From left to right: the front wheels motor, the two push-phase motors, the two find-phase motors.
Bottom view. If you look carefully at the gearing, you notice that the gear switch is not actually a "switch". In fact the find-phase pair of motors is never disconnected, they're always engaged. The switch only insert two more motors that are mechanically connected with a lower ratio (1:24 against 1:3).
Close up view of the switch actuator.
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