Abstract: A balancing method is provided for dynamically balancing parts intended for use in rotating machines. The method is most advantageous when used on parts that are originally cut on a numerically controlled cutting machine or are easily defined by a part cutting program. The method begins with rotating the part and producing electrical error signals proportional to the part's imbalance. The error signals are used to determine in digital format an amount and location of material that must be removed from the part to render it rotationally balanced. The part cutting program is then appropriately modified so that if the part is remachined, the necessary material will automatically be removed. The part is then properly positioned in a numerically controlled cutter, remachined using the modified part cutting program, and the necessary material is automatically removed.