Increase feed rate. Machine operators commonly respond to a vibration problem by reducing the cutting speed and leaving the table feed alone. Speeding up the machine or the feed may seem like a recipe for disaster. However, an increase in feed at the same rpm may turn out to be the ideal solution. Anyone who has experienced harmonic vibrations in a car on the highway knows either speeding up or slowing down can end the noise.
Vary entry points.
Moving the centerline of the cutter slightly to either side of the entry point on the workpiece can often reduce the tendency to chatter or vibrate. The offset creates a finer entry angle and prevents forces from oscillating from one side of the cutter to the other. Toolholding options Balance and true cutting tools. Cavity milling operators seeking to minimize vibration should make sure their tool is properly balanced and that it is mounted true to the spindle center. Strategies for connecting the tool to the machining center vary widely.