# US 7,607,236 B1 · Functional rolling master gear, spindle, and arbor compensation > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,607,236 B1 - Document ID: US7607236B1 - Status: Granted - Kind: B1 - Application number: 12/099,274 - Filed: 2008-04-08 - Published: 2009-10-08 - Granted: 2009-10-27 - Earliest claimed: 2008-04-08 - Assignees: Illinois Tool Works Inc. - Inventors: Jeffrey J. Patrick; Darren E. Santelman - Web page: https://patentgrep.com/patent/US7607236B1 ## CPC - G01M 13/02: Gearings; Transmission mechanisms - G01M: TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR ## Abstract A method for providing error compensation in a double flank functional gear testing apparatus is disclosed in which a total composite signal is generated and errors due to master gears, master gear spindles, arbors, and work gear holding devices are eliminated from the total composite signal, such that the error due to a work or precision setting master gear is distilled. ## Claims ### Claim 1 A method for providing error compensation in a double flank functional gear testing apparatus, the method comprising the steps of: generating a total composite signal; evaluating an error in a master gear; evaluating an error in a master gear spindle; evaluating an error in a work gear holding device; eliminating a master gear error, a master gear spindle error, and a work gear holding device error from the total composite signal. ### Claim 2 (depends on 1) The method for providing for error compensation of claim 1, wherein a total displacement signal is generated for gear mesh center distance. ### Claim 3 (depends on 1) The method for providing for error compensation of claim 1, wherein a total displacement signal is generated for gear lead. ### Claim 4 (depends on 1) The method for providing for error compensation of claim 1, wherein a total displacement signal is generated for gear taper. ### Claim 5 (depends on 1) The method for providing for error compensation of claim 1, wherein a total displacement signal is generated for gear mesh center distance, gear lead, and gear taper simultaneously. ### Claim 6 (depends on 1) The method for providing for error compensation of claim 1, wherein the error in the master gear is determined by comparing teeth on the master gear to a single reference on a precision setting master gear. ### Claim 7 (depends on 6) The method for providing for error compensation of claim 6, wherein the error in the master gear is determined by comparing teeth on the master gear to a single reference on a precision setting master gear, measuring a gear mesh distance, a gear lead, and a gear taper simultaneously. ### Claim 8 (depends on 1) The method for providing for error compensation of claim 1, wherein the error in the master gear spindle is determined by comparing teeth on the master gear to a single reference on a precision setting master gear. ### Claim 9 (depends on 8) The method for providing for error compensation of claim 8, wherein the error in the master gear is determined by comparing teeth on the master gear to a single reference on a precision setting master gear, measuring a gear mesh distance, a gear lead, and a gear taper simultaneously. ### Claim 10 (depends on 1) The method for providing for error compensation of claim 1, wherein a precision setting master gear is mounted to the work holding device, the work holding device including a work spindle and an arbor. ### Claim 11 (depends on 10) The method for providing for error compensation of claim 10, wherein the error in the work spindle and the arbor are determined by rolling the precision setting master gear with the master gear in double flank tight mesh. ### Claim 12 (depends on 11) The method for providing for error compensation of claim 11, wherein the precision setting master gear is loaded on the work spindle and arbor arbitrarily. ### Claim 13 (depends on 11) The method for providing for error compensation of claim 11, wherein a displacement measurement is evaluated for each of a plurality of radial count positions for one revolution of the precision setting master gear. ### Claim 14 (depends on 11) The method for providing for error compensation of claim 11, wherein a total displacement measurement for gear mesh center distance is taken for each of a plurality of radial count positions for one revolution of the precision setting master gear. ### Claim 15 (depends on 11) The method for providing for error compensation of claim 11, wherein a total displacement measurement for gear lead is taken for each of a plurality of radial count positions for one revolution of the precision setting master gear. ### Claim 16 (depends on 11) The method for providing for error compensation of claim 11, wherein a total displacement measurement for gear taper is taken for each of a plurality of radial count positions for one revolution of the precision setting master gear. ### Claim 17 (depends on 11) The method for providing for error compensation of claim 11, wherein total displacement measurements for gear mesh center distance, gear lead, and gear taper are evaluated simultaneously for each of a plurality of radial count positions for one revolution of the precision setting master gear. ### Claim 18 (depends on 13) The method for providing for error compensation of claim 13, wherein the total displacement measurement for gear mesh center distance is taken for each of the plurality of radial count positions for one revolution of the precision setting master gear, wherein the plurality of radial count positions refers to 360 divided by a number of degrees of rotation of the arbor and spindle with respect to the precision setting master gear. ### Claim 19 (depends on 18) The method for providing for error compensation of claim 18, wherein the total displacement measurements are evaluated with the arbor and spindle and precision setting master gear in the same radial position. ### Claim 20 (depends on 18) The method for providing for error compensation of claim 18, wherein the total displacement measurements for gear mesh center distance, gear lead, and gear taper are evaluated, the arbor and spindle having rotated to a different radial position than the precision setting master gear.