磁気ばね支持形バランサの開発

抄録

In this report, we will describe a magnetic-spring-type balancer utilizing an effect of a magnetic spring in place of a balancer using either a conventional leaf spring or bar spring. A quite low spring constant can be easily realized by a magnetic spring utilizing a pair of permanent magnets and a steel ball. In addition, there is no vibration mode of higher degree as found in the leaf spring of the bar spring, and a stable measurement can be performed even if the number of revolutions is increased. We have applied this magnetic-spring-type balancer to a VTR cylinder and obtained a measurement accuracy of less than ±5% and a minimum resolution of 2×10<-8> kg-m.