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  1. #3
    This thesis should help you. The sources which excite resonance in the system are the tool and motor, so you can consider the spindle speed and number of flutes for the former. The latter is less predictable, but potentially significant if you use stepper motors.

    You might find that avoiding symmetry helps reduce the magnitude of the deflection.
    Last edited by Jonathan; 10-05-2014 at 08:54 PM.
    Old router build log here. New router build log here. Lathe build log here.
    Electric motorbike project here.

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