| 摘要 |
PROBLEM TO BE SOLVED: To provide a control device for a machine tool capable of performing a control to suppress interference between a pair of servo motors and efficiently performing highly accurate machining without adjusting torsional rigidity for each kind of workpiece. SOLUTION: This control device is provided with a non-interference correction device 10 to suppress mutual interference of the pair of servo motors 7a and 7b. The non-inference correction device 10 is provided with a difference value of each of position feed back values FB1 and FB2 detected from the pair of servo motors 7a and 7b, a torsion rigidity estimation block for estimating torsion rigidity of the workpiece based on a torque command value for measuring torsion rigidity imparted to the pair of servo motors 7a and 7b to generate torsion in the workpiece, a difference value of each of speed feedback values FB3 and FB4 detected from the servo motors 7a and 7b, and a torque command value correction block for estimating a torque command correction value to correct a torque command value of the servo motors 7a and 7b based on the torsion rigidity estimated by the torsion rigidity estimation block. COPYRIGHT: (C)2009,JPO&INPIT
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