Applicability of Tool Condition Monitoring Methods Used for Conventional Milling in Micromilling: A Comparative Review

Table 1

Summary of methods used for tool condition monitoring of milling process at micro- and macroscale.

S. number	Methods for tool condition monitoring	Citations for macroscale	Citations for microscale
1	Acoustic emission sensors	[22–34]	[35, 36]
2	Cutting force measurement sensors	[37–39]	[40–42]
3	Machine vision sensors	[43–48]	Not available
4	Acceleration and vibration measurement	[49–53]	[54]
5	Actuator current measurement	[55–58]	[59]
6	Stress/strain measurement	[60–62]	Not available for milling
7	Machine learning and prediction estimation based approaches	[66–77]	[78]
8	Sensor fusion	[79–83]	[84]