| Summary: | 碩士 === 國立中興大學 === 機械工程學系所 === 99 === The thermal error problem of conventional induction motor high speed spindle technology is an important point that we have to solve for machine tools. The Z axial error of conventional induction motor high speed spindle not only produced by heat source of bearing but also the centrifugal force when spindle turning. And thermal error compensation has been used the solve this problem for several years . In this paper, there are two case：
Case1：We try to get the better Z axial error compensation by using1)the model build by rpm with the motor temperature 2)the model build by the motor temperature 3)the congruence model build by rpm with the motor temperature. Compare these models ,the 3) is the best way of these three methods. The axial error was reduced from 7.108um to -0.35um. When temperature raised and descended, the signal of the temperature sensor in the conventional induction motor high speed spindle are deferent when they are in the some temperature. So we tested three temperature sensor：PTC130, PT100, and KTY84 to realize the characteristic of these three temperature sensor and conferred which one is better.
Case 2：Tapping machine is important for the manufacture of 3C products. When spindle turning, the heat source of bearing and motor will conduct to the components of machine and it''s will change the distance of work point between tool. In this paper, we used PT100 temperature sensor to take the temperature signal of the tapping machine and used the ARX model build by using temperature and rpm data to compensation this thermal error. In the end, the axial error was reduced from 16 um to 7um.
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