Frequently Asked Question

How are vibration amplitudes changing based on the lobe I am machining in?
Last Updated 3 months ago

In the highest lobe (first lobe on the far right), the natural frequency and tooth passing frequency match. If you are in the lobe, there is no chatter but the vibration amplitudes are highest because of resonance. In the second lobe (second lobe from the far right), the tooth passing frequency is ½ of natural frequency, hence the resonance (forced) vibrations are less. The third lobe has even smaller vibration amplitudes and so on.

If you move the speed to left a bit and stay away from exact lobe peak (the pointy part of the lobe), you may have higher productivity and forced vibrations with smaller amplitudes.

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