This paper is studied the noise and vibration tendency of the industrial robot about
the characteristic of the high precision reduction. The industrial robot is installed six
reductions because of composed with six axes. We investigate the noise vibration characteristic
and the stiffness of the reduction through the signal and system analysis. The analytic model of
the industrial robot is made of the rigid body and the equivalent properties of the reduction.
And we analyze the dynamic characteristic of the industrial robot. To verify the analysis
result, we exam through the impact test.