1, when the parts for rotary motion components, such as various shafts, shaft, fan, water pump impeller, tools, electric motors and turbine rotors, etc., collectively known as the rotator. In the ideal situation next time the rotation of the rotors is not rotated, the pressure on the bearings is the same, so that the rotor is balanced rotor. But works in a variety of rotors, due to uneven or rough material defect, machining and assembly errors generated, even designed with a variety of factors have an asymmetric geometry, making the rotating body is rotating on each centrifugal force generated by a small particle can not cancel each other out, centrifugal force and adopted on the basis of the mechanical bearing action, cause vibration, resulting in noise, accelerated bearing wear and shorten the mechanical life, serious accidents can be devastating. Therefore, we must balance the rotor, it allows the balance to reach the level of accuracy, or to mechanical vibration amplitude and therefore drop generated within the allowable range. . Balancing machine is a measure of a rotating object (rotor) unbalance the size and location of the machine. HE rotor when rotated about its axis, due to the mass axis with respect to the uneven distribution of the centrifugal force generated. This imbalance centrifugal force acting on the rotor bearing can cause vibration, noise and accelerated bearing wear, thus adversely affecting the product's performance and life. Rotating parts rotor, spindle, Crankshaft, turbine rotor, gyro and watch balance wheel in the manufacturing process and so on, we have to go through in order to balance the smooth functioning properly. Machine according to the measured data to rotor unbalance is corrected, it can improve the quality of the distribution of the rotor relative to the axis of the vibration or the effect produced by the rotor rotation is reduced to within the permissible range of the vibrating force on the bearings. Therefore, balancing machine is to reduce vibration, improve performance and enhance the quality of essential equipment. Imbalance is most prevalent variety of rotating machinery failure. Rotor imbalance causes are many, such as the structure of the rotor design is unreasonable, machining quality of deviation, assembly error, the material is uneven, balancing accuracy is poor; change in the relative position of the coupling operation; rotor parts are missing, such as: running due to corrosion, abrasion, uneven medium scale; rotor fatigue stress caused by rotor parts (such as: impeller blades, etc.) localized damage, loss, etc. to produce fragments flying. So do balancing rotating equipment, especially in high speed rotor. Static unbalance: the uneven mass distribution of the rotor, the rotor is not rotating axis center line, at rest, the center of gravity G by the force of gravity, causing the rotor can not be in any position remained stable, this phenomenon is called static unbalance. Dynamic Imbalance: As the rotor rotates, if the mass of the rotor imbalance caused by two or more opposing centrifugal force and the centrifugal force which is not in the same plane, so that the rotor by the couple, thus producing about axis swing, then this phenomenon is called dynamic unbalance. Obviously, this dynamic imbalance of the rotor at rest is balanced. In the static balance Rotors static balance when the bench, still on track to balance the rotor on the table, rolling back and forth several times, then the inevitable heavy side vertically down, so the results are consistent with several, that is, below is position rotor imbalance weight G, the symmetry direction, that is, plus the balance weight position. Balancing is the balancing test bench or in the field, the key influential factor method harmonious component method. Which influence coefficient method most commonly used for single plane, by measuring the vibration of the original, plus vibration test after the weight, calculate the impact factor, determine the need emphasis (de-emphasis) in size and angle.