Improved gear metrology based on the calibration and compensation of rotary table error motions

A reduced self-calibrating method for rotary table error motions

“…Moreover, the deviations of some rotary tables are not 2π-periodic, as is typically the case for rotary tables with rolling-element bearing. While the three-rosette method can still be used to detect the rotary table deviations using an adapted measurement strategy [8,9], the results generally cannot be used for compensation purposes, since the angular position of the rotary table is known only modulo 2π. In this paper, it is assumed that the deviations are periodic after one revolution, as is normally the case for highly precise rotary tables with aerostatic bearings.…”

“…The ball plate used in [7] is equipped with 12 equally distributed spheres and therefore yields error motions with a step size of 30 • . This may be unsatisfactory if the results are to be used, for example, for compensation of gear measurements, as large parts of the compensation data must be calculated by means of interpolation [8,9]. Putting more spheres on the circular ball plate will improve the resolution but also increase the measurement time and production costs for the artefact.…”

Dimensional artefacts to achieve metrological traceability in advanced manufacturing

“…Further examples and details on gear artefacts are reported elsewhere (e.g. [116], [3], [280]). Calibrated thread artefacts have also been used for traceability transfer in newly developed screw thread measurement methods using contact and non-contact CMSs [47] [296].…”

Automated sampling path planning model for complex surface of cylinder gear based on laser scanning techniques

“…In industrial manufacturing processes, the geometrical inspection of cylindrical gear tooth flanks is critical and challenging, and is directly associated with subsequent assembly and terminal gear quality. 3D geometric measurements of cylindrical gear, such as helix, profile, pitch, radial run-out and tooth thickness measurement, are ones of the crucial fundamental quantities to ensure their conformity to design specifications serving a range of industries, from shipping, automotive and aerospace industries to house applications [1][2][3][4] . Traditionally, the gear measuring task has been performed at a very slow pace via GMM (Gear Measuring Machine), CMM (Coordinate Measuring Machine) or portable CMM including measuring arms.…”