Importance

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Abstract

The control system of the present invention is particularly usable with extended vibration conveyors and permits the installation of a multiple of drive vibratory drive units comprised of one or more vibratroy modules. Each module comprises a motor, one or more shafts mounting eccentric weights, and a shaft encoder device monitoring the 'relative position' of each shaft with respect for each shaft. One shaft, a master shaft, is driven continuously driven at a predetermined speed from which the actual relative positions are compared. A control device is programmed with the predetermined relative shaft positions and receives signals from the various encoder devices indicative of the actual relative positions of the shafts, compares the signals to a position of the master shaft and causes one or more motor control devices to alter the speed of each motor having a shaft whose actual relative position has varied from the predetermine relative position until the actual relative position essentially matches the programmed relative position.

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First Claim