MACHINE TOOL AND METHOD OF COMMUNICATION

摘要

A machine tool comprising: a holder to which a tool is fixed; a transmission/reception device provided in said holder; and a controller electromagnetically carrying out radio communication with said transmission/reception device: wherein a reception device is provided with an oscillation circuit simultaneously generating a plurality of carrier waves each having a distinct frequency; a modulation circuit modulating signal waves on said plurality of carrier waves; and a first antenna transmitting to a reception device a plurality of electromagnetic waves each modulating said signal waves on one of said plurality of carrier waves: and wherein said reception device is provided with a second antenna receiving each of said electromagnetic waves transmitted; and a gate switch permitting said signal waves to be judged only when said plurality of carriers are simultaneously received. <IMAGE>