Endmill chatter at 20,000 Frames-per-Second

Endmill chatter at 20,000 Frames-per-Second What does it look like when an endmill starts chattering? How about at 20,000 frames-per-second? I'm in the shop playing with a high speed camera, filming Online Carbide 1/4" 4FL variable helix end mill on mild steel with my AvidCNC Benchtop Pro. Reall...

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