Haas Automation, Inc.

Robert Weston

Kurt P Zierhut

Razmik G Petrossians

German M Chistokhodov

Barry D Johnson

Joseph V Soliman

Brian Lammering

Wayne Reilly

A cut optimization system controls chatter in a machine tool during a cutting operation. A microphone is configured to capture acoustic noise emitted by the machine tool during the cutting operation and to generate an AC signal corresponding to the captured acoustic noise. A filter is configured to attenuate frequencies of the AC signal outside of a frequency band and a rectifier is configured to rectify the filtered AC signal into a DC component. A controller is configured to compare the DC component with a threshold value and, if the DC component is greater than the threshold, cyclically vary the rotational speed of a spindle in the machine tool from a commanded speed.

Cut optimization system and method

A method for decelerating a motor in a computer numerical controlled machine tool is provided. The method includes calculating a present rate of deceleration D, for a motor of a motor drive system, based on a present speed Sof the motor, a reference speed Sof the motor, and a reference rate of deceleration Dof the motor. The method also includes decelerating the motor from Saccording to D. The motor drive system comprises a maximum power rating that defines a maximum power, generated by the motor while decelerating, that can be dissipated without overloading the motor drive system. Dis a rate of deceleration such that power, generated by the motor while decelerating from Saccording to D, is equal to the maximum power rating. Power, generated while decelerating the motor from Saccording to D, is equal to or less than the maximum power rating.

Systems and methods for decelerating a motor in a computer numerical controlled machine tool

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Thousand Oaks, CA, United States of America

Robert Weston