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The Trackball, rotated in any desired direction by your hand or fingers, enable position control easily and accurately. It generates precise digital signals by rotating the ball, with a hand or fingers, to any direction.The trackball includes optical encoders having quick response, high reliability, and long lifetime.

Structure and Principle (Contact-method : Encoder type)
The ball is supported by ball bearings or balls, and can be rotated in any direction. The signals are obtained by rotating the ball, which is mechanically coupled to the encoders via rollers.Two rollers located at 90 degrees to each other turn respective rotary encoders such that the X and Y components of ball rotation are outputted as electrical signals.