Speed and Load Programming of Endurance Type Tire Test Machines 700090
New government and industry test specifications have imposed many changes in tire durability testing. Changes in speed and load of tires during an endurance test are easily accomplished with a programmed test machine. Loading is done by a servo-type d-c gearmotor and ball screw, while speed is controlled by a thyristor (SCR) drive system. Both speed and load can then be varied in relation to time or miles.