Patent ID: 7449857

Claim:
A servo control device comprising: a speed controller for performing speed control of a motor; a position controller for inputting a target command increment value as an increment of the sampling period of a target command and a position output increment value as an increment of the sampling period of the position output of the motor and outputting a speed command to the speed controller; and a first feed-forward controller for inputting the target command increment value and outputting a first speed feed-forward signal to the speed controller; wherein the first feed-forward controller adds a third speed feed-forward signal obtained by multiplying the second-order differentiation of the target command by a control gain to a second speed feed-forward signal V FF , outputs as a first speed feed-forward signal V F2 the resulting signal to the speed controller and sets the control gain so that the deviation between the target position and the position output of the motor will be zero at a constant acceleration.