Modeling and Prediction Method for CNC Machine Tools’ Errors Based on Spatial Feature Points

Table 3

The verification points’ actual errors.

Measured value		(μm)			(μm)			(μm)
		Dx	Dy	Dz	Dx	Dy	Dz	Dx	Dy		Dz
		1.370	0.530	0.870	−4.610	16.980	−23.910	−11.420	23.930		−28.320
		−1.270	8.150	−9.630	−6.030	18.540	−26.580	−12.490	28.260		−31.410
		−2.850	10.280	−20.670	−9.480	18.950	−29.080	−14.530	40.410		−36.080
		1.570	10.210	3.690	−3.510	19.440	−22.580	−12.330	29.090		−30.820
		−0.330	11.120	−5.150	−5.470	19.640	−25.210	−13.590	40.530		−32.730
		−2.120	15.590	−13.170	−8.280	24.720	−27.580	−15.260	42.490		−34.710
		2.420	15.660	−4.890	−2.940	20.690	−24.730	−10.460	37.880		−34.880
		1.140	19.870	−13.210	−4.530	22.850	−27.830	−12.910	41.370		−36.220
		−1.860	19.150	−22.580	−7.450	29.770	−31.570	−14.420	49.660		−37.330