controlled by a control section not shown which includes a computer system the rotational direction the rotational speed and the rotational angle of the first shaft 14 and the second shaft 18 are controlled by controlling the rotational direction the rotational speed and the rotational angle of an output shaft of the first motor 46 with this control the moving direction the moving speed and the moving length of the x rod 34 can be controlled on the other hand the rotational direction the rotational speed and the rotational angle of the third shaft 20 and the fourth shaft 22 are controlled by controlling the rotational direction the rotational speed and the rotational angle of an output shaft of the second motor 50 with this control the moving direction the moving speed and the moving length of the y rod can be controlled by controlling the moving direction the moving speed and the moving length of the x rod 34 and the y rod 40 the two dimensional moving direction the moving speed and the moving length of the moving body 42 are controlled the control section including the computer system may control the movement of the moving body 45 on the basis of a stored data table which includes the two dimensional moving direction the moving speed and the moving length of the moving body 42 with respect to the rotational direction the rotational speed and the rotational angle of the output shafts of the first motor 46 and the second motor 50 successively another embodiment will be explained with reference to fig4 note that constituting members which have been described in the.