The invention relates to a device comprising at least one motorized conveyor (10, 13, 14) for conveying a flow of harvested crop between an upstream (10a, 13a, 14a) and a downstream (10b, 13b, 14b) ends of said conveyor along a longitudinal direction (D10, D13, D14), said device further comprising:- at least a sensor for monitoring a longitudinal inclination of the device in relation to a nominal orientation of said device；- means for computing a conveyor speed based on said monitored longitudinal inclination, said conveyor speed being adapted to maintain the conveying kinematics of the harvested crop independent from said inclination；- means for operating the motorized conveyor (10, 13, 14) at said computed conveyor speed.
