Abstract
Thermal errors can have a significant effect on CNC machine tool accuracy. The thermal error compensation system has become a cost-effective method of improving machine tool accuracy in recent years. Thermal errors of ball screw system directly affect the positioning errors of CNC machine tools. This paper illustrates how virtual sensors for temperature measurement can support the thermal model to predict the thermal errors while reducing the temperature monitoring cost. Experimental results under different working conditions were performed and the proposed model for thermal error compensation proves to be accurate in predicting the thermal error of CNC machine tools.
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