Abstract: A method of adjusting a drive mechanism includes measuring backlashes between the ring gear and the plurality of drive devices, and determining about positions of the plurality of drive devices with reference to the ring gear based on the backlashes measured in the measurement step. The measurement step includes: aligning the pinion of one of the plurality of drive devices to face a reference position in a circumferential direction of the ring gear and measuring a backlash between the ring gear and the said one drive device; and aligning the pinion of another one of the plurality of drive devices to face the reference position of the ring gear by revolving the plurality of the drive devices relative to the ring gear, and measuring a backlash between the ring gear and the said another drive device different from the said one drive device whose backlash has been measured.

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.

Abstract: A method of computing gear modifications from a gear inspection chart is provided. The method includes extracting a gear profile from the gear inspection chart. The method also includes quantifying the gear profile. The method also includes determining a gear modification based on a quantified gear profile. The method also includes qualifying a gear based on the gear modification.