Dynamic balancing machine

Cyclical forces due to the out-of-balance of a rotating body on bearings are transmitted from the bearings to a vibratory beam at points of application corresponding to the distance between bearings. Force sensors engaging on the beam at points lying in two balancing-out planes detect forces in balancing-out planes to indicate weight correction necessary in each plane or predetermined radius, and phase indicating means responsive to rotation of the body ahd periodic forces on the sensors indicates angular position for the corrections. If the center of gravity of the body is not between the bearings and tends to tilt the beam, the force from one bearing position is applied in opposite direction on the beam with a corresponding reversal position of a sensor.