The numerical control device null machine tool which possesses the function which outputs

摘要

PROBLEM TO BE SOLVED: To provide a numerical controller for quickly recovering from a state when an emergency stop instruction is generated.;SOLUTION: Movement instructions commanded to each feeding shaft in each interpolation period are successively stored. A movable part to be driven by the feeding shaft is moved along a path 1. The movable part interferes in another article 2, and an emergency stop instruction is generated at a position A, and the movable part stops at a position B. When the emergency stop instruction is generated, the respective shaft movement instructions in the respective interpolation periods are added for a time(time for two interpolation cycles) set from a movement instruction in the interpolation cycle at that time, and the code of the added value is inverted, and outputted as a movement instruction in one interpolation cycle. As a result, the movable part returns to a position C, and the interference of the other article 2 and the movable part is immediately prevented. Thus, it is possible to immediately prevent the interfering state, and to prevent the damage of the movable part to be driven by the feeding shaft or the other interfering article 2 to the minimum.;COPYRIGHT: (C)2006,JPO&NCIPI