In order to inspect the condition of micro milling cutter automatically and accurately in the on-line process, a dedicated micro milling cutter condition inspection system was established in this paper, which includes an on-machine inspection device and a controller. The key methods of the automatic dimension measurement and the cutting edge condition inspection for micro milling cutters are studied. The proposed methods can measure cutter diameter and clamping height, classify tool type as well as inspect cutting edge condition from both radial and axial direction. The experiments verify that the proposed methods and the developed inspection system can fulfill the needs of industrial applications.

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