Control system of machine tool

A control system of a machine tool which machines a work, the control system comprising:

• a control device which controls a drive axis of the machine tool based on control data;
• a machined surface measurement device which measures a machined surface of the work;
• and
• an analysis device which analyzes a failure on the machined surface of the work,
• wherein the analysis device includes:
• a first acquisition portion which acquires, from the control device, the chronological control data when the work is machined;
• a second acquisition portion which acquires spatial machined surface measurement data after the machining of the work measured by the machined surface measurement device;
• a data-associating processing portion which associates the chronological control data acquired by the first acquisition portion and the spatial machined surface measurement data acquired by the second acquisition portion with each other;
• a machined surface failure detection portion which detects the failure on the machined surface of the work and a location thereof and a failure depth of the failure location based on the spatial machined surface measurement data acquired by the second acquisition portion;
• and
• an identification portion which identifies, based on the control data and the machined surface measurement data associated with each other by the data-associating processing portion, control data of the failure location corresponding to the machined surface measurement data of the failure location detected by the machined surface failure detection portion so as to identify the failure depth corresponding to the control data of the failure location, and
• wherein the control device corrects the control data of the drive axis of the machine tool based on the control data of the failure location identified by the analysis device and the corresponding failure depth.