Any conveyor that is powered by a mechanical device that moves materials or products along a conveyor line, other than by gravity or by manually pushing the payload, is a powered conveyor.
MDR – Motor Driven Live Roller conveyor is a relatively new type of conveyor. It uses small DC motors to slave drive transportation rollers. These small motors are distributed through out the conveyor and each motor becomes an accumulation zone. Simple controller cards are used to control the motor speed and direction.