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The traditional thermal error compensation system of ball screw feed drive is highly dependent on the feedback temperature or positioning data. Because of the overdependence to measuring technique, increasing of compensation system cost and decreasing of productivity level will be an inevitable trend in a machine tool. This paper presents a new approach in ball screw thermal error compensation system which can work without any temperature or positioning feedback. As the parts of the thermal error compensation system, component heat generation, compensation method, thermal model, mathematic model and calculation method were studied respectively. In order to discuss the correctness of the developed thermal error compensation system, a series of tests contains positioning accuracy and temperature distribution was carried out in the same working condition of prediction. As the results, the test data well confirmed the correctness of the developed ball screw thermal error compensation system Keywords—Ball Screw, Thermal Error, Feed Drive, Error Compensation, Calculation Method, Positioning Error

Study on Thermal Error Elimination for a Ball Screw Feed Drive