Patent ID: 7085665

Claim:
A method for automatically compensating for an unbalance correction position and an unbalance correction amount in a balancing machine, comprising the steps of: (1-i) measuring an unbalance amount and an unbalance position of a rotor completing a primary unbalance correction thereof; (1-ii) determining whether the initial unbalance amount before the unbalance correction is within the range of set value which is correctable by a one-time correction; (1-iii) incrementing counter if it is determined that the initial unbalance amount is within the range of set value in step (ii); (1-iv) determining whether the unbalance amount measured in step (i) is larger than a good-quality reference value for determining whether the rotor has a bad quality or good quality; (1-v) measuring angular deviation between the unbalance positions of before and after the unbalance correction when the measured unbalance amount is larger than the good-quality reference value in step (1-iv); (1 -vi) determining whether the angular deviation of the unbalance positions measured in step (1-v) is 0°±X1° and 180°±X1° (0<X1 <5) or 0°+X2° and 180°+X2° (X1<X2 <90); and (1-vii) compensating unbalance correction position and amount, further comprising the steps of: (a) comparing the number of times when the angular deviation of the unbalance position is 0°X2°and 180+X2° with the number of times when the angular deviation of the unbalance position is 0°−X2° and 180°−X2° when the counter from step (iii) reaches the value set by an operator for calculation of average value, (b) compensating the angle for differences in angular deviation according to the larger number of times in step (a), (c) comparing the number of times when the angular deviation of the unbalance position is 0°±X1° which occurs when insufficient unbalance correction is achieved at an accurate correction position with the number of times when the angular deviation of the unbalance position is 180°±X1° which occurs when excessive unbalance correction is achieved at an accurate correction position, and (d) compensating for the unbalance correction amount by increasing the unbalance correction amount if the number of times for 0°±X1° is larger or by reducing the unbalance correction amount if the number of times for 180°±X1° is larger.