Procedimiento para operar una instalacion de transporte con una correa y al menos un tambor de accionamiento para accionar la correa, donde para modificar la velocidad de la correa dentro de una ventana de tiempo definida por un primer numero de revoluciones del tambor de accionamiento y un segundo numero de revoluciones del tambor de accionamiento se controla el par de giro que actua sobre el tambor de accionamiento

The method involves providing a conveyer system (2) with a belt (4) and a driving drum that is utilized for driving the belt. Rotational torque is controlled for changing velocity of the belt within a time slot that is defined by rotation speeds of a driving drum (6), where the rotational torque is provided on the driving drum. One of the rotation speeds is set smaller than the other rotation speed, and the rotational torque is controlled within the time slot in such a manner that the rotational torque is monotonically raised. An independent claim is also included for a conveyor system.