Skip to Content
Find More Like This
Return to Search

Rotary fast tool servo system and methods

United States Patent

August 18, 2009
View the Complete Patent at the US Patent & Trademark Office
Lawrence Livermore National Laboratory - Visit the Industrial Partnerships Office Website
A high bandwidth rotary fast tool servo provides tool motion in a direction nominally parallel to the surface-normal of a workpiece at the point of contact between the cutting tool and workpiece. Three or more flexure blades having all ends fixed are used to form an axis of rotation for a swing arm that carries a cutting tool at a set radius from the axis of rotation. An actuator rotates a swing arm assembly such that a cutting tool is moved in and away from the lathe-mounted, rotating workpiece in a rapid and controlled manner in order to machine the workpiece. One or more position sensors provides rotation and position information for a swing arm to a control system. A control system commands and coordinates motion of the fast tool servo with the motion of a spindle, rotating table, cross-feed slide, and in-feed slide of a precision lathe.
Montesanti; Richard C. (Cambridge, MA), Trumper; David L. (Plaistow, NH), Kirtley, Jr.; James L. (Brookline, MA)
Massachusetts Institute of Technology (Cambridge, MA)
10/ 940,427
September 14, 2004
GOVERNMENT SUPFORT This invention was supported, in whole or in part, by Lawrence Livermore National Laboratory, Subcontract No. B516613, under Grant No. W-7405-ENG-48, awarded by the Department of Energy. The government has certain rights in the invention.