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Error analysis method of numerical controller using ball bar
Error analysis method of numerical controller using ball bar
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机译：球杆数控机床的误差分析方法
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摘要
The present invention discloses an error analysis method of a numerical controller using a ball-bar. In the error analysis method of the numerical controller using the ball bar according to the present invention, the total length error of the ball bar is sampled by sampling the length error of the ball bar at a predetermined angle during circular interpolation motion of the ball bar mounted on the machine tool ( A first step of measuring c); Backlash, master slave switching, and servo mismatch error when the weighted error constant (alpha _i) is 1 Calculating a second process; A third step of obtaining an equation for calculating an extra value (e (theta)) between the measured comprehensive error and the sum multiplied by the unknown weighted error constant for each error calculated in the second step; The angle error when the extra value e (theta) has a minimum value A fourth step of obtaining each weighted error constant alpha _ i for the RTI ID = 0.0 And the weighted error constant alpha _ i calculated as the error pattern (each error) And a fifth process of calculating a substantial corresponding error value by multiplying the multiplier).;According to the present invention, it is possible to quantitatively analyze the major errors caused by the numerical controller from the total length error measured using the ball bar, and also to evaluate the influence of each error pattern from the total length error, and to determine the most significant error pattern. First of all, calibration is possible, which can greatly reduce the calibration time of the numerical controller.
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