Numerical control machine tool and rotating shaft pitch error detection method thereof

[0015] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0016] After long-term research, the inventor of the present application found that the motion accuracy of the CNC machine tool table is determined by the screw rod of the CNC machine tool. If the screw rod has some precision errors, the error will inevitably be reflected in the machining of the machine tool. In order to solve this problem, the pitch compensation method can be used to compensate the error of the lead screw, thereby reducing