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Proceedings Paper

Experiment study on friction drive
Author(s): Guomin Wang; Lisheng Ma; Zhengqiu Yao; Guoping Li
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Paper Abstract

In the past years, friction drive was developed to overcome the inherent deficiencies in both worm drive and gear drive. No periodical error and free of backlash are the main advantages of friction drive. With the trend towards bigger and bigger aperture of the optical telescopes, there are some reports about friction drive employed to drive the telescopes. However friction drive has its own deficiencies, such as slippage and creepage. This report here describes the study on the friction drive finished in an experiment arranged by LAMOST project. It comprises three main parts. First, it introduces the experiment apparatus and proposes a new kind of measurement and adjustment mechanisms. Secondly, the report gives the analysis of friction drive characteristics theoretically, such as slippage, creepage and gives the results of corresponding experiments. The experiment shows that the lowest stable speed reaches 0.05"/s with precision of 0.009"(RMS), the preload has little influence on the drive precision in the case of constant velocity and the variable velocity when the angle acceleration is less than 5"/s2 with close loop control and the creepage velocity of this experiment system is 1.47"/s. Lastly, the analysis in the second section lists some measures to improve the precision and stability further. These measures have been actually conducted in the testing system and proved to be reliable.

Paper Details

Date Published: 29 September 2004
PDF: 10 pages
Proc. SPIE 5495, Astronomical Structures and Mechanisms Technology, (29 September 2004); doi: 10.1117/12.550979
Show Author Affiliations
Guomin Wang, National Astronomical Observatories/Nanjing Institute of Astronomical Optics and Technology (China)
Lisheng Ma, National Astronomical Observatories/Nanjing Institute of Astronomical Optics and Technology (China)
Zhengqiu Yao, National Astronomical Observatories/Nanjing Institute of Astronomical Optics and Technology (China)
Guoping Li, National Astronomical Observatories/Nanjing Institute of Astronomical Optics and Technology (China)


Published in SPIE Proceedings Vol. 5495:
Astronomical Structures and Mechanisms Technology
Joseph Antebi; Dietrich Lemke, Editor(s)

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