Improvement of the Efficiency of Machine Tools due to Coherent Operation of the Source and Consumer of Mechanical Power

— A possible way to improve the operation efficiency of complicated systems is the method of coherent operation of individual system elements. The operation efficiency of a machine tool can be improved by provision of its optimum position between the electric motor drive and a rigidly coupled cutting tool. The optimum mutual position of the electric motor shaft and the cutting tool can be achieved by coincidence of the maximums of the generated and consumed torque. Any deviation of the mutual position of the maximums of generated and consumed torque leads to alternating oscillations of torque in the system of rotating bodies: electric motor shaft–cutting tool. A drawback of the generated torque against required torque leads to an increase in sliding of the electric motor and a local decrease in efficiency for about 180 degrees of rotation of the electric motor shaft.