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In order to answer the needs for high accuracy and efficiency of machine tools in recent years, thermal deformation has become an important issue. Therefore many studies for suppressing, estimating and compensating the thermal deformation have been carried out. Moreover, the establishment of accurate and efficient measurement and evaluation method of the thermal deformation is also strongly demanded. In the present study, the method to evaluate independently and efficiently the thermal displacement characteristics due to the linear motion of each axis was considered for machining centers. As a result, we have concluded as followed. (1) We could propose All Axis Motion Test (AAMT) method that can evaluate independently and simultaneously the thermal displacement characteristics due to the movement of the each linear axis. (2) AAMT method can be said to be valid, since the experimental results based on this method agrees well with the test result from the single axis motion test. (3) Significantly high efficiency of the measurement and evaluation of thermal displacement of the machining centers is possible by AAMT method

High-Efficient Evaluation Method of the Thermal Deviation Characteristic of Machining Center by All Axes Motions