The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 14, 1993
Filed:
Mar. 24, 1992
Dale E Helgren, Green Bay, WI (US);
Thomas J Doyle, Winneconne, WI (US);
J. M. Voith, GmbH, Heidenheim, DE;
Abstract
A real time straightness deviation measuring and compensation device for a machine tool that automatically and continuously compensates for bed way deviation from a truly straight line relative to a workpiece. A wire, parallel to the workpiece or axis of workpiece rotation and perpendicular to the direction of machine tool compensation is utilized as a straightness reference, with the wire being stretched in the direction of machine tool carriage travel and supported on either end by weights for gravity induced straightness. A position indication device, such as a laser micrometer, is attached to the machine tool carriage and positioned around the reference wire in order to read the position of the wire relative to the machine tool carriage during real time operation. An electronically controlled servo motor attached to a machine tool supported on the carriage automatically adjusts the machine tool to compensate for carriage deviation caused by bed way deviation relative to the straight reference wire.