Patent ID: 7089081

Claim:
A method for controlling an abrasive process comprising: generating an open-loop model of a cut rate of an abrasive article type when applied to workpiece type over an abrading period, wherein generating the model comprises computing the cut rate R of the abrasive article as a function of a length of time that the abrasive article has been applied to the workpiece at a substantially constant force in accordance with a first equation as follows: R=R 1 ×e −t/T 1 +R 2 ×e −t/T 2 , where R 1 and R 2 are constants set according to an initial cut rate for the abrasive article, t equals a length of time that the abrasive article has been applied to the workpiece, and T 1 and T 2 are time constants; and abrading a workpiece of the workpiece type with an abrasive article of the abrasive article type in accordance with the model to achieve a substantially constant cut rate.