11.3.2.3.4-3 Force Joystick Dynamic Characteristics

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