q Fig. 6.6.5. Roller conveyor with multiple drive through bevel gears In a light duty powered roller conveyor, the rollers may be driven by one endless flat belt driven below the rollers, and supported by idle rollers such that the belt touches all the rollers and transmit power to them by friction. This is, unlike others, not a positive drive. When each of the driven rollers are driven by an individual motor, it is called individual drive. These motors may be high speed motors transmitting motion through a reducing gear (Fig. 6.6.6). Alternatively, specially designed slow speed hollow rotor shaft motors are used which are directly coupled to the roller shaft. With the availability of better electri- cal control systems, individually driven roller conveyors are getting more popular particu- larly for reversing duty.