Numerically controlled machine tool

Abstract

An improvement applicable to a multi-axis numerically controlled machine tool for the purpose to enable the means small in capacity. A numerically controlled machine tool provided with plural axes and which is driven by plural driving motors (SP(n)) each of which is attached by an angular position sensor (POS(n)) is provided with (a) a plurality of numerical controller (CNC(n)) each of which is provided with a programmable controller (PMC(n)) for controlling the plural driving motors (SP(n)) in response to external numerical information, and (b) a numerical controller changing-over network (COC) having plural changing-over circuits (COS(n)) for connecting each of the selected ones of the plural angular position sensors (POS(n)) and of the controllers of the driving motors and the corresponding each of the selected ones of the plural numerical controllers (CNC(n)), in response to the changing-over signal (CO) generated by the plural programmable controllers (PMC(n)). As a result, each of the selected numerical controllers (CNC(n)) is allowed to be fed, in the reverse sense, an arbitrarily selected one of the angular position signals (P(n)) sensed by the arbitrary one of the angular position sensors (POS(n)), enabling the selected driving shaft to be controlled in response to the aforementioned angular position signal (P(n)).

Dependencies are inferred from the claim text.