Patents by Inventor Matthew W. Dawson

Matthew W. Dawson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method for measuring center of rotation of a nozzle of a pick and place machine using a collimated laser beam
    Patent number: 7746481
    Abstract: A method of measuring and storing a center of rotation of a nozzle in a pick and place machine is provided. The method includes coupling an artifact to the nozzle. A substantially collimated laser beam is directed at the artifact, which is rotated while the collimated laser beam is energized. Edges of a shadow cast by the rotating artifact are detected and used to calculate error of a coordinate of the center of rotation of the nozzle. A coordinate of the center of rotation of the nozzle is calculated based upon a previous coordinate of the center of rotation and the error. The calculated coordinate of the center of rotation is stored for subsequent measurements.
    Type: Grant
    Filed: March 20, 2008
    Date of Patent: June 29, 2010
    Assignee: CyberOptics Corporation
    Inventors: David M. Kranz, David W. Duquette, Matthew W. Dawson
  • Method for Measuring Center of Rotation of a Nozzle of a Pick and Place Machine Using a Collimated Laser Beam
    Publication number: 20080231864
    Abstract: A method of measuring and storing a center of rotation of a nozzle in a pick and place machine is provided. The method includes coupling an artifact to the nozzle. A substantially collimated laser beam is directed at the artifact, which is rotated while the collimated laser beam is energized. Edges of a shadow cast by the rotating artifact are detected and used to calculate error of a coordinate of the center of rotation of the nozzle. A coordinate of the center of rotation of the nozzle is calculated based upon a previous coordinate of the center of rotation and the error. The calculated coordinate of the center of rotation is stored for subsequent measurements.
    Type: Application
    Filed: March 20, 2008
    Publication date: September 25, 2008
    Inventors: David M. Kranz, David W. Duquette, Matthew W. Dawson