Setting error

Determinations of the actual site must be unified in the same uniform ways to obtain repeatable and reproducible datum.

On horizontal scaler, to keep the continuous pressure to the hub circular surface from the device, 1,500gr weight was applied vertically to exert 400gr obliquely from the vertical side wall of the device. This is one of the most important arrangement to obtain stable and monotonous datum with adequate repeatability.

The error on the stage of device setting to the object is the matter to be eliminated as less as possible, in short the excluding any uncertain factors.