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:
Jul. 27, 1999
Filed:
Apr. 27, 1998
Kristjan Tomas Gunnarsson, Pittsburgh, PA (US);
James Simpson Hemmerle, Pittsburgh, PA (US);
PHT, Inc., Pittsburgh, PA, US;
Abstract
A method for calibrating the center point of a tool attached to a robot face plate or other machine uses a calibration block having vertical and horizontal faces. The position of the tool center point is determined by moving the tool from a starting position to touch one of the faces, recording the location of the face plate and returning the tool to the starting point. This is repeated for the other surfaces. Then the tool center point can be calculated from the recorded locations. Also disclosed is a calibration block having a centering area with four walls arranged to form a parallelogram and a leveling area with four walls arranged to form an x, y coordinate axis.