Development of Precision Index Mark from Incremental Measuring system

• Main Authors: Hsiao, Heng-Sheng, 蕭恆昇
• Other Authors: Chang, Jen-Yuan
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/w4m63q

碩士 === 國立清華大學 === 動力機械工程學系 === 102 === Different from the commercial usage of electromagnet for manufacturing process, this paper utilized a permanent magnet for manufacturing process to develop index mark on an incremental measuring system. Magnetic encoders have been gradually emphasized in recent years due to its advantage of affordable price and ability to withstand and operate in harsh environment. Also, magnetic encoders have similar application as that of optical encoders. However, the accuracy and resolution of current magnet encoders are not able to compete with the mid or high level performance of optical encoders. The quality of manufacturing process is crucial in influencing the positioning accuracy of magnetic encoders. This study first used theoretical approach to investigate different manufacturing methods. For the design of measuring platform, simulated and experimental results were used to confirm the feasibility of index mark. The design of measuring platform included the choice of materials, dimensions, and methods of system control. After the manufacturing method is finalized, the shape of the write head needs to design and analyze in order to optimize the quality of manufacturing process. In addition, measuring system was put into test to evaluate the magnetic flux distribution, positioning accuracy, and repeatable accuracy. Finally, reliability analysis was carried out on the sample to examine the performance of index mark on measuring system. In the near future, the measuring system is expected to improve in order to enhance manufacturing quality and advance to higher level of measuring system development. These improvements will play an important role in the application of machinery and robotic positioning control.