Patent ID: 7571022

Claim:
A method for monitoring health of a machine tool operable to perform at least one operation cycle including at least one machining operation on a workpiece, the machine tool including a spindle configured to hold a cutting tool and first, second and third slides, each of the slides being operable to effect a linear movement of a portion of the machine tool in a direction different from the direction of movement effected by the other slides, the machine tool having at least one sensor operatively connected thereto for sensing a machine operation parameter, and a controller configured to output data related to operation of the machine tool, the method comprising: operating the machine tool outside an operation cycle to effect movement of a portion of the machine tool, including: operating the first, second and third slides separately, and operating the three slides simultaneously, and operating the spindle in a first manner, including accelerating the spindle until it reaches a first spindle speed, operating the spindle at the first spindle speed for a first predetermined time, and decelerating the spindle; processing data from signals output from the at least one sensor and from the controller to define movement-specific data profiles including: first, second and third slide data profiles and a combination slide data profile, and a first spindle data profile having an acceleration portion, a steady speed portion, and a deceleration portion corresponding to the respective movements of the spindle as it is operated in the first manner; and applying an algorithm to: the first, second, third and combination slide data profiles to generate four corresponding movement-specific data points, thereby facilitating generation of four corresponding movement-specific trend lines, and analysis of cross-transmissivity between the slides, and at least one of (a) the entire first spindle data profile to generate a single movement-specific data point for the entire first spindle data profile, or (b) the acceleration portion, the steady speed portion, and the deceleration portion of the first spindle data profile to generate three corresponding movement-specific data points, thereby facilitating generation of at least one additional movement-specific trend line.