Dynamic Modal Analysis of Vertical Machining Centre Components

Table 1

Natural frequencies analysis of spindle.

	Different major mode shape (Hz)
Spindle	Inner Spindle			Outer spindle
Condition	1st	2nd	3rd	1st	2nd
Experimental	4394	6866	8294	9009	11371
Theoretical	4322	6389	8004	9520	10291
Error (%)	1.67	7.47	3.62	5.37	10.49