The pulley controls the movement of the belt and performs critical functions such as driving, redirecting, turning, tensioning and tracking the belt. Several conveyor systems are used and one of the most popular is the conveyor belt. It usually consists of two pulleys, with a continuous loop of material, the conveyor belt, which moves between them. Conveyors can operate continuously, intermittently or at variable speeds, and variable-speed conveyor motors are controlled by variable speed variators (VSD).
The speed of the conveyor greatly affects the cleaning capacity of the SURF RAKE. Faster belt speeds help the SURF RAKE remove smaller material, while slower belt speeds are optimal for removing large, bulky material. The speed of the conveyor belt is directly related to the speed of the TDF shaft and the motor. Therefore, as the tractor engine RPM, or revolutions per minute, increases, so will the conveyor speed.
Most tractors indicate the optimal operating area of the PTO on their tachometer. For this application, the drive operates at a certain number of revolutions corresponding to the required length of the conveyor belt.