Abstract: A bin activator apparatus includes first and second motors, each motor having an eccentric weight coupled thereto. The activator apparatus also includes first and second phase angle sensors associated with the first and second motors for generating first and second position signals indicative of the positions of the eccentric weights, a controller responsive to the first and second position signals for measuring a real time phase angle between the eccentric weights, comparing the real time phase angle to a user-entered desired phase angle, and generating a phase angle error signal, and a frequency drive operably coupled to at least the first motor and responsive to the phase angle error signal for adjusting the speed of the first motor until the real phase angle is substantially equal to the desired phase angle.

Abstract: An exciter mass assembly for vibratory processing equipment includes an exciter frame and at least one resilient member connecting the exciter frame to the vibratory processing equipment. A motor is supported by the exciter frame so that the exciter frame and motor define a frame center of gravity. The motor includes a rotating shaft defining a shaft center of gravity. The prime mover is positioned with respect to the exciter frame such that the shaft center of gravity is substantially coincident with the exciter mass center of gravity, thereby to minimize movement of the exciter mass assembly in unintended directions.