Conveyor control device

Abstract

A control device adapted to be connected to a conveyor system having a drive motor, a motor control unit which provides a motor control signal to the drive motor and a motor speed sensor adapted to output a motor speed signal to the motor control unit. The control device comprises: a motor speed alteration unit adapted to intercept the motor control signal and to provide a modified motor control signal to the drive motor so as to cause the motor speed to increase or decrease by a speed change value from a first motor operating speed to a target motor operating speed; and a feedback unit adapted to intercept the motor speed signal and to provide a scaled motor speed signal to the motor control unit based on the intercepted motor speed signal, the scaled motor speed signal indicating to the motor control unit that the motor speed has not been increased or decreased from the first motor operating speed by the speed change value.

Dependencies are inferred from the claim text.