... conveyor, slat conveyor, elevated conveyor, continuous and Reciprocator, roller conveyor non-powered and accumulated, robot machine, hydraulic platform, etc. It's a ... them.One or both of the drums (or pulleys) are powered by motoreducer, moving the belt and the material, the other ... are free to turn being dragged from the first.The powered drum is called "drive drum" while the unpowered pulley is ...