Design And Study Of Precision Motion Platform Based On ITO Graphic Short Circuit Tester

With the rapid development of liquid crystal display (LCD), the market has shown higherand higher demand to high display-quality production. As an equipment to check theshort-circuit problem of ITO membrane, ITO Graphic Short Circuit Tester had played animportant role in improving the rate of good product for LCD manufacturer. So it would be ofgreat significance in designing and developing a new kind of motion platform which hadhigh-precision and the ability of fast response.Based on the design claims of ITO Graphic Short Circuit Tester of Beijing TSTDPhotoelectric Technology Co. Ltd., This paper mainly conducted the following researches:Firstly, the design plan was made according to the design claims and motion theory ofhigh-precision platform. The choice was made on the style of the main component part bycalculation, such as ball screw, rolling guide and servo motor. A platform was designed whichcould satisfy the requirement above by Inventor. This platform used “ball screw and servomotor” as the main driving mode. In order to meet the accuracy requirements of design, thisresearch also chose a high-precision ball screw and rolling guide, a high resolution servomotor.Secondly, some researches were conducted on the accuracy influencing factors of rollingguide as well as theory of the resolution displacement, and methods on the improvement ofdisplacement accuracy were raised. Using the simulation software ANSYS Workbench,researches on static analysis and modal analysis between rolling guide and drivingcomponents were made respectively. By comparing the first six modal vibration modes andthe intrinsic frequencies of rolling guide with and without prestressing state, intrinsicfrequencies of each phase and the corresponding vibration modals under the different states of the rolling guide were obtained. A conclusion was drawn that the rolling guide has a highintrinsic frequency and high vibration resistance. The results of finite element analysis of thedriving component showed that the system has high rigidity and intrinsic characteristic.Finally, the whole machine was assembled by considering how to ensure the assemblyprecision, and the detection experiments was made. The composition of the platform systemwas researched, and much attention was paid to the rolling guide and working plate whichmaybe have an influence on the accuracy of platform based on the precision requirementsamong the whole assembly. At last, some useful suggestions on assembly were raised, whilean experiment with the assembled platform was made. The result showed that it could fullymeet the technical requirements.