Ball robot concept
 

Ball Robot Concept

A ball robot design that might work! the design is based on heavy weight suspended from the center of the ball. a change in position of the weight along the axis can make the ball move in x and y direction. A semicircular ring pulls itself forward or backward causing an X-Axis movement. The circular ring displaces the semi-circular ring along its plane and causes the weight (added with motor 1 such as a battery) to move in Y-axis and will make the ball move in y direction. Motor 2 will need a flexible wire conection as the wire will strech and contract depending on the movement of the two motors. The biggest problem in such a robot is a sense of direction. Imagine trying to control this robot with a remote control, with no sense of direction initial movement will be unexpected. One solution to this problem is to use a transparent ball. Other is to mark the X and Y axis along the sphere