| 摘要 |
PROBLEM TO BE SOLVED: To provide a simply structured printing original plate laser image drawing device with a function to prevent control instability from occurring with a clamp for fixing a printing original plate. SOLUTION: In the printing original plate laser image drawing device 10, a laser beam 23a is condensed to the surface of a cylindrical body 22 in the radial direction of a rotor by a laser beam condensing means 25 provided on a mobile table 24 which travels in parallel with a rotary shaft 21 along the surface 22a of the cylindrical body 22, and consequently, a printing original is imaged on the surface of the cylindrical body 22. On the mobile table 24, two displacement sensors 26a, 26b for measuring a displacement in the radial direction on the surface of the cylindrical body 22, are provided. Further, an output from a photoelectric sensor 36 for identifying an output from the displacement sensors 26a, 26b and the non-presence of the printing master on the side face of the cylindrical body 22 is entered to a sample hold circuit, and an output signal to be sent by the sample hold circuit controls a linear motor 27. Entry of data to a mirror controller 34 results in the elimination of significant variability in a clamping part, so that the follow-up action of the linear motor 27 is facilitated. |
