New 3 Phase Motor/VFD for my RF45 Mill

Finished machine - I may replace the vfd controls in future, but working well over last three months:

IMG_20230831_114045.jpg


The hall effect RPM guage needs a little tweak to reduce distance, but does work. The drawback is that the magnet picks up iron and steel swarf. Ok as a one off to check speed ranges, but an optical sensor might be a better option:

IMG_20230831_115255.jpg
 
How is the magnet mounted? I've been racking my brain trying to figure out how to get some sort of rpm feedback for my Bridgeport's spindle; but, I got nothin'.
 
Just stuck to the spindle with magnetism. Holds up to 2400 RPM and easy to remove if I want to tram the head.
 
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