The output of the force joystick should be proportional to and in the same direction as the user’s perceived applied force. The force to displace the cursor with a hand- or finger-operated joystick should be a minimum of 4.5 N (1.0 pound). The force for full output should be a maximum of 118 N
(27 pounds).
Additional Information: 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 position. When used to generate free-drawn graphics, the refresher rate for the follower on the display should be sufficiently high to give the appearance of a continuous track. 100, 5908