Patent ID: 7425811
Filing Date: 2008-09-16
Classification: B22D,G05B

Abstract:
1. A numerical controller in which a position deviation is obtained by a position deviation counter based on a command position and a detected actual position, a position loop control is carried out based on the obtained position deviation, and a servomotor which drives and controls a control axis is controlled, the numerical controller comprising actual speed obtaining means for obtaining an actual speed of said control axis, position command means for obtaining a command movement amount using, as an initial speed, an actual speed obtained by said actual speed obtaining means when a state in which no current is applied to the servomotor is switched over to a state in which current is applied to the servomotor, and outputting the obtained command movement amount to said position deviation counter, and means for outputting a position deviation amount corresponding to said initial speed to said position deviation counter in a first move command outputting period subsequent to said switchover.