| 摘要 |
PURPOSE:To enable pass length for correcting the position information of printing state variation data by seeking the web pass length of a printer from a timing signal for passage of a metal piece attached to printing paper through each detector and length data from a measurement means. CONSTITUTION:A web-shaped printing paper 2 which is continuously supplied from a feeder reel 1 is printed by each printing unit 111, 112, 113, ..., 11n of a printer 10, and then is wound by a takeup reel 3 again. A rotary encoder 14 capable of outputting a pulse corresponding to the length of running printed matter is mounted right after a final printing unit 11n. In addition, metal detector 131, 132, ..., 13n are provided on each printing unit 111, 112, ..., 11n, and further a metal detector 15 is located where the rotary encoder 14 is installed. These detectors detect passage of a metal piece attached to the printing paper 2. In an arithmetic control unit 20, the difference between a count value of the detectors 131, 132, ..., 13n of each printing unit and a count value of the detector 15 is calculated to a pass length from an original point (a position where the rotary encoder is set) to each printing unit. |
