Diagnostic service system and diagnostic method using network

Abstract

A diagnostic service system includes one or plurality of factory monitoring systems configured to perform monitoring of at least one machine; a service center management device that is connected with the one or plurality of factory monitoring systems via a network; one or plurality of service centers that are connected with the service center management device; and a plurality of service terminals connected with one service center or each of the plurality of service centers via a service control. The plurality of service terminals are used by each responder capable of fault diagnosis of the machine, and when fault of a machine occurs, one of the plurality of service terminals is selected via the service center management device and the one service center or plurality of service centers.

What is claimed is: 
     
         1 . A control device of a machine tool provided with a motor, the control device comprising:
 a storage unit in which a motor command speed and a motor current during machining are stored at fixed intervals,   wherein the control device identifies whether the machine tool has exceeded a rated torque of the motor during machining, on a basis of a relationship between a motor command speed and a motor current at factory settings and a relationship between the motor command speed and the motor current during machining.   
     
     
         2 . The control device according to  claim 1 , wherein the motor command speed and the motor current during machining are stored in the storage unit together with an acquisition time. 
     
     
         3 . The control device according to  claim 1 , wherein the motor command speed and the motor current during machining are stored in the storage unit in a shared format in which data array and units are standardized. 
     
     
         4 . A method of controlling a control device of a machine tool provided with a motor, the method comprising:
 storing a motor command speed and a motor current during machining at fixed intervals, and   identifying whether the machine tool has exceeded a rated torque of the motor during machining, on a basis of a relationship between a motor command speed and a motor current at factory settings and a relationship between the motor command speed and the motor current during machining.