Numerical controller with function of decelerating reference variable in path table operation

摘要

A numerical controller capable of avoiding a shock to a machine by a controlled axis when a command of an alarm, a reset or a feed hold is issued in a path table operation. The numerical controller performs the path table operation where position of a controlled axis of a machine is controlled in synchronism with an input value of a reference variable indicative of time, a position of an axis or a position of a spindle according to a data table that stores command positions of the controlled axis respective for set values of the reference variable. The numerical controller comprises deceleration/stop command receiving means that receives a command to decelerate and stop the controlled axis in the path table operation; and decelerating means that gradually reduces a rate of increase of the reference variable to zero so that the controlled axis is decelerated and stopped in response to the deceleration/stop command.