CNC Milling Vibration Analysis

Analysis of 3-axis accelerometer data reveals that CNC milling failures originate in the Y-axis dynamics. Anomalous ("bad") cycles are characterized by prematurely shortened cycles (dropping from ~60,000 to ~40,000 data points) and a dramatic shift in Y-axis behavior.

The most reliable early indicator of failure is the sharp drop in Y-axis kurtosis, moving from a highly peaked distribution (~7.0) to a negative value (-0.72 to -0.03). This coincides with a reduction in maximum Y-axis amplitude, signifying a loss of the characteristic impact or engagement profile seen in nominal operations.