The output of the displacement joystick should be proportional to and in the same direction as the displacement of the joystick from the center. The maximum joystick movement should be 45 degrees from the center position.
Additional Information: The resistance should be sufficient to maintain the handle position when the hand is removed. Movement should be smooth in all directions, and positioning of a follower should be attainable without noticeable backlash, cross-coupling, or the need for multiple corrective movements.
Control ratios, friction, and inertia should meet the dual requirements of rapid gross positioning and precise fine positioning. When used to generate free-drawn graphics, the refresh rate for the follower on the display should be sufficiently high to give the appearance of a continuous track. 5908