This invention is a method to determine the condition of rotating equipment, namely drive spindles, to enable the timely maintenance or replacement of same. The method uses an electrical signal from a vibration sensor mounted on part of the drive train to measure the level of vibration energy when the...http://www.google.de/patents/US20060178854?utm_source=gb-gplus-sharePatent US20060178854 - Diagnostic method for predicting maintenance requirements in rotating equipment
