- The small TSM with a height of 28 mm realized the continuous adjustment of micro taper angle from 0◦ to 1.6◦, the taperswing motion along with the servo-feeding motion of micro wire electrode, and the precise positioning of micro-taper vertex. The adjustment error of taper angle is less than 0.037◦ when the adjusted taper angle is more than 0.4◦, and the runout error of electrode wire is less than 3 m.