An Improved Tool Wear Monitoring Method Using Local Image and Fractal Dimension of Workpiece

Table 3

Experimental parameters and results.

No.	1	2	3
Spindle speed	1600 rpm	1600 rpm	1600 rpm
Feed speed	400 mm/min	500 mm/min	600 mm/min
Cutting depth	0.5 mm	0.7 mm	0.9 mm
Cutting width	8 mm	8 mm	8 mm
Evaluation layer	2	4	1
Fractal dimension	0.3374	0.3520	0.0286
Tool wear area (proposed method)	0.0234	0.1499	0.0217
Tool wear area (direct method)	0.019	0.148	0.019
Error	23.16%	1.28%	14.21%