Contour accuracy measuring system and contour accuracy measuring method

A contour accuracy measuring method applicable to a machine tool having a controller and multiple shafts, the contour accuracy measuring method comprising:

• capturing, by a capturing module, a feedback signal that the controller uses to instruct the shafts to move along a machining route, and calculating, by the capturing module, locations of the shafts in a machine coordinate system;
• transforming, by a transforming module, the locations of the shafts in the machine coordinate system to locations in a workpiece coordination system;
• calculating, by a processing module, a first true round trajectory of the machining route on an inclined plane presented in the workpiece coordination system as a reference information;
• transforming, by the transforming module, the workpiece coordination system of the reference information into the machine coordinate system and restoring the locations of the shafts in the workpiece coordination system back to the locations in the machine coordinate system;
• and
• based on the locations of the shafts of the reference information in the machine coordinate system, adjusting, by an adjusting module, parameters of the controller corresponding to the locations of the shafts to generate a target information that includes a second true round trajectory on the inclined plane.