NAYUTA tracks the movement of celestial objects with an error of less than 0.5 arc-seconds. An arc-second is a unit of angular measurement equal to 1/3600th of a degree, which means that NAYUTA operates with ultra-high precision.
This superb precision is made possible by a friction drive. The rotation of the motor is transmitted to the azimuth and altitude axes by means of the frictional force generated between the roller attached to the motor axis and the wheel attached to the azimuth and altitude axes. This is referred to as a friction drive system.
No gears are used, because the movement of the gears' teeth alone could cause errors in performance. Not even the slightest vibration can be allowed, so the movements of NAYUTA must be rigidly controlled with extreme accuracy.
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