Reliability Test Rig of the Motorized Spindle and Improvements on Its Ability for High-Speed and Long-Term Tests

Table 2

Conditions of axis orbits’ tests.

Conditions	Speed (r/min)	Direction	Angle error (mm/mm)	Radial error (mm)	Description
Condition 1	1000	Vertical	−0.01/100	−0.01	Good alignment
		Horizontal	−0.02/100	+0.01
	5000	Vertical	−0.01/100	−0.01
		Horizontal	−0.02/100	+0.01
Condition 2	1000	Vertical	−0.02/100	−0.06	Radial misalignment
		Horizontal	−0.01/100	−0.02
	5000	Vertical	−0.02/100	−0.06
		Horizontal	−0.01/100	−0.02
Condition 3	1000	Vertical	−0.02/100	−0.02	Angular misalignment
		Horizontal	−0.16/100	−0.01
	5000	Vertical	−0.02/100	−0.02
		Horizontal	−0.16/100	−0.01
Condition 4	1000	Vertical	−0.09/100	−0.04	Synthesized misalignment
		Horizontal	−0.89/100	+0.02
	5000	Vertical	−0.09/100	−0.04
		Horizontal	−0.89/100	+0.02