| 摘要 |
PURPOSE:To eliminate the need to manually adjust the fitting position of a paper for printing at a desired part on the paper and make it possible to constantly print at a predetermined position on the paper, by providing a means for detecting the ends of the paper in the moving directions of a carriage. CONSTITUTION:When a serial printer is set into an operable condition, a carriage 3 is moved from one end to the other of a movable range L thereof. Meanwhile, a photo-sensor 4 provided on the carriage 3 detects a light emitted from a fluorescent lamp 5 provided on the rear side of a paper 2, thereby detecting the boundary between a place where the paper 2 is absent and a place where the light is interrupted by the paper 2. A section t1 over which the carriage 3 is moved until it reaches the left end 6 of the paper 2 and a section t2 over which the carriage 3 is moved to pass across the width of the paper are detected by a paper end-detecting means, whereby the fitting position of the paper 2 and the width of the paper 2 are automatically confirmed. By this, it is possible to print at the same part measured relatively from an end of the paper even when the paper is fitted at, for example, a position deviated in a moving direction of the carriage, and it is possible to avoid printing at a position on the outside of the paper width. |
