| 摘要 |
PURPOSE: To print a desired image on the surface of a plate-shaped object such as a steel plate within a short time by providing a marking control means responding to the output of a plate-shaped object feed position detection means and reading the content stored in a memory to eject ink to the desired position of a plate-shaped object from a nozzle. CONSTITUTION: When the start point of a steel plate 2 is detected by a start point detection means 35, a means detecting the feed position in a first direction operates and calculates the feed moving quantity of the steel plate 2. The motor of a rising and falling drive means is driven corresponding to the output of a distance detection means to drive a support 11, therefore, a marking head 5 so as to displace the same up and down. A plate thickness detection means 31 applies only initial positioning data and the data controlling the rising and falling displacement at a time when the steel plate is present under the head is outputs of four distance detection means attached on the upstream side of the support 11 in the same way as the start point detection means 35. When the final point of the steel plate 2 is detected by a final point detection means 36, the detection operation of the feed moving quantity along the first direction 4 of the steel plate 2 is completed. |
