Table 3.

The global set-up errors and the local set-up errors in rotational axis for the old vacuum group and the new vacuum group (°)

Directions		The old vacuum group		The new vacuum group
		Σ	σ	Σ	σ
GROI-CROI	Pitch	0.79	0.77	0.65	0.65
	Roll	0.67	0.85	0.97	0.83
	Yaw	0.68	0.62	0.61	0.54
GROI-SROI	Pitch	1.44	1.58	1.04	0.64
	Roll	1.28	1.39	0.99	0.68
	Yaw	1.55	1.14	0.94	0.87
GROI-AROI	Pitch	4.51	3.05	2.66	1.78
	Roll	7.52	3.75	2.63	1.78
	Yaw	4.4	3.12	2.55	1.82