Numerical controller with machining restart function

摘要

A numerical controller having a function of restarting suspended machining. According to the numerical controller, blocks of a machining program in execution are successively analyzed; specific codes which command specific functions of the numerical controller among codes contained in blocks of the machining program are designated in advance; status of the specific codes designated in advance in the analyzed block of the machining program are stored; it is determined whether or not status of the specific function is changed based on comparison of newly stored status and already stored status of the specific code; and information about the block which is determined to contain the specific code by which the status of the specific function is changed is acquired and saved as program restart block data for restarting the suspended machining.