224Setup for the naphthalene blade

The naphthalene blade is fixed on a circular plate by two screws from bottom. Pins are used to make sure that the same position can be maintained for before and after runs. The circular plate is supported by three cylinders of the same height on the rotary table and connected to the rotary table by four long screws so that the plate and the fixed blade can rotate together with the rotary table. The height of the cylinders and the tightness of the screws must be adjusted to make sure the blade stands straight vertically. A pre-scanning of the blade rims of the side surface before the formal scanning can put the gauge in an

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