| 摘要 |
PROBLEM TO BE SOLVED: To provide a tailstock control device capable of setting a distance unable to support a workpiece, to the shortest distance fit for a machine specification.SOLUTION: A tailstock control device comprises a tailstock parameter setting part 4 for accepting the setting of an acceleration time ta and a moving speed V of a tailstock, a measurement period (t) and a measurement frequency (n) of driving torque in advance, a calculation part 21 for calculating an acceleration section distance La on the basis of the acceleration time ta and the moving speed V, a calculation part 22 for calculating a constant speed section distance Lb on the basis of the moving speed V, the measurement period (t) and the measurement frequency (n), a driving torque detection part 9 for detecting the driving torque of a servomotor and a control part 5 for calculating a limit value τc of the driving torque of the servomotor on the basis of the driving torque T detected by the driving torque detection means and a torque command value τa of the servomotor required for supporting a workpiece, when moving the tailstock by La+Lb set as a driving torque measurement distance Lt. |
