Pictured is the structure of a single-plane balancing machine is working, the soft-bearing. The clamping spindle mA two leaf springs with the spring stiffness c1, c2 almost free of damping on the drive housing to hang. The mass of the leaf springs and the drive belt are contained proportionally in mA. When attaching the body to be balanced (flywheel) lowers the clamping spindle from around the way xS. When balancing occurs, the oscillation amplitude x and the bearing force amplitude F_g.