平行ばね移動台の寄生角変位

概要

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This paper discusses the pitch (angular tilt) of a moving platform, which is the main factor to determine the accuracy of motion in parallel spring movements. As major causes of the pitch the following factors are considered : (1) inaccuracies of construction such as the inequality in free lengths of the two springs and the inequality in separation of the two springs, and (2) the height at which to drive the platform. The theoretical analyses of the effects of these factors on the pitch, and the experiments conducted to verify the validity of the analyses, are presented. It is shown that the pitch due to the driving condition can be eliminated by proper selection of the driving point. It is also shown that the pitch due to the inequality in separation of the two springs can be eliminated by adjusting the length of a moving platform. Description of a variable-length moving platform, which was devised for this purpose, is included.
公益社団法人精密工学会の論文
1990-09-05