The present invention discloses a new method and apparatus of the automatic balancing technique for weighing apparatus. In this method, because of different unbalanced actions of unbalanced mechanical parts, the motor will be connected with different power supplies and result in different working states, making the counter weight be always in the position of balance. The technical advantage of the invention is that it eliminates the errer sources resulted from lag, creep, temp. difference and gravity acceleration, which are involved intrinsically in the spring-balances with a spring and in the electronic balances with a sensor. The invention is suitable for various weighing apparatuses so as to increase the accuracy and lower the cost by hundreds of times. |