| 摘要 |
PURPOSE:To reduce man-hour and to prolong the life of the scale plate moving device by reducing the marking man-hour, eliminating the frequent repeating for positioning the scale plate and the frequent start and stop. CONSTITUTION:In the device for marking the scale line by irradiating the front surface of the scale plate 9 sent in the direction of the scale by a constant speed by the laser beam swing with a scanner, the scanner is moved so that the irradiating place with laser beam is moved in the direction making the angle theta to the direction of the carrying speed V of the scale plate 9 by the speed V/costheta, the irradiation of the laser beam is started at the time point corresponding to the beginning position of the scale line for marking, and laser beam irradiation is finished after the lapse of time corresponding to the length of the scale line. |
