In the evaluation of the generic function of robots, Dr. Genichi Taguchi has suggested to use the angular displacement of robot arms as the signal for the S/N ratio calculations. In this paper, two joints in a multi-joint robot were used for the evaluation of robot function. For data collection, an appropriate wall was devised to construct a plane to project the readings so that three-dimensional readings could be decomposed into two-dimensional data. From the results of this experiment, a reproducible evaluating method was obtained from the observation of the gains in the S/N ratio.
