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Artefacts

A new and up-to-dateapproach for the design of artefacts.
Ultra - High Precision Artefacts should have a geometry similar to that of the specimens(=Identity Condition)Artefacts should feature all important gear and spline

IC Artefacts Artefactcombinations

The design of conventional artefacts is very different from that of the specimens. There is no similarity, not to mention an identity condition. IC artefacts can be designed with a similar profile to that of the work- pieces to be tested. This is necessary in order to be able to estimate the measuring uncertainty when specimens are inspected on gear measuring machines.IC artefacts can be designed in a number of ways. They can be manufactured for running gears, internal and external gearing with different modules and pitch circle diameters as well as for splines. Their geometrical size can be made to suit small plastic gears and HGV gears. Spur gears + Helical gearsSector gears + Composite gears Left flank + Right flank One tooth space + Opposite tooth space Even number of teeth + Odd number of teethProfile deviation: For spur and helical gears with 30° left and right hand helix angles.Helix deviation: For spur and helical gears with 30° left and right hand helix angles.Pitch deviation: For individual and cumulative pitch.Runout deviation: For runout, position of axis and roundness.Dimension over balls: For odd and even numbers of teeth. 7