Patent ID: 7659681
Filing Date: 2010-02-09
Classification: G05B

Abstract:
1. A numerical controller, including a servo control unit that controls a servo motor, and a numerical control unit that outputs a position command and a pressure command to said servo control unit based on a NC program, said servo control unit, comprising: comparing means for comparing a command obtained by performing a feedback control of a pressure with a command obtained by performing a feedback control of a position; control switching means for automatically switching pressure control or position control according to the comparison result of said comparing means and controlling said servo motor; and informing means for determining whether the servo control unit is currently in the midst of position control or pressure control, and informing said numerical control unit of the determination result, and said numerical control unit, comprising: switching execution means for terminating the operation of a movement command halfway when informed of switchover to pressure control by said servo control unit in the midst of execution of the movement command to which a command for switching to pressure control is added, and then starting execution of the next command of said NC program.