A horizontal axis drive mechanism includes a first linear motor including a first fixed section and a first movable section fixing a load section and moving the load section in the horizontal direction, a support body supporting the first fixed section, a first linear guide arranged between the support body and the first fixed section and moving the first fixed section, a rotation conversion type counter including a rotating body rotatably supported by the support body and a converting means converting movement of the first fixed section in the horizontal direction into rotation of the rotating body, and a control section controlling the position of the first movable section in the horizontal direction.

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