| 摘要 |
PROBLEM TO BE SOLVED: To provide a sheet processing device capable of detecting a sheet end in a width direction of a sheet rear end with a high degree of precision, an image forming device, and a control method.SOLUTION: A sheet processing device 500 includes a sheet processing device control part 101, a horizontal registration detection motor 220, a horizontal registration detection sensor unit 504; a shift unit 508, etc. After moving the horizontal registration detection sensor unit 504 to a stand-by position, a CPU 110 of the sheet processing device control part 101 moves it in a sheet width direction, detects two points of the sheet end along a sheet conveyance direction by the horizontal registration detection sensor unit 504, and calculates a deviation amount of the sheet end in the sheet width direction. According to the deviation amount of the sheet end of the first sheet, the stand-by position of the horizontal registration detection sensor unit 504 for detecting a sheet end of the second and subsequent sheets is changed. |
