Abstract: A system for measuring the accuracy of a machines and mechanisms having a driving member and a driven member is disclosed. The absolute position of the driving member is determined using a first absolute encoder operatively engaged to the driving member. The actual absolute position of the driven member is also determined using a second absolute encoder operatively engaged to the driven member. The theoretical absolute position of the driven member is then calculated based upon the absolute position of the driving member. The actual absolute position of the driven member is compared to the theoretical absolute position of the driven member, preferably by subtraction, to determine the accuracy of the machines and mechanisms. Optical absolute encoders may be used and the process may be performed using a microprocessor which may utilize a ratio function to calculate the theoretical absolute position of the driven member based upon the absolute position of a driving member.
Type:
Grant
Filed:
December 12, 1994
Date of Patent:
June 24, 1997
Assignees:
Gurley Precision Instruments, Inc., Alexander S. Tseytlin
Inventors:
O. Patrick Brady, Clyde J. Hindes, Boris I. Mintseris, Alexander S. Tseytlin