Patent ID: 6591148
Filing Date: 2003-07-08
Classification: G05B,Y02P,Y10T

Abstract:
A numerical control device to synchronously control a movement of a plurality of axes of a machine, with respect to each other, to repeatedly control a cyclic motion by storing a movement of each axis of the plurality of axes for respective predetermined periods in a memory unit and by supplying the movement stored in the memory unit to each axis of the plurality of axes every predetermined period, comprising:a retracting unit to provide an amount of retraction to a specified axis, as a retracting axis, from among the plurality of axes, such that the retraction is added to a synchronous control of the retracting axis to stop the supply of the movement stored in the memory unit, upon an occurrence of an emergency stop due to an external signal or alarm, wherein the retracting unit stops the supply of the movement at a predetermined point of the cyclic motion.