| 摘要 |
PROBLEM TO BE SOLVED: To reduce labor and time for measuring a conveyance amount to calculate a correction value for conveyance.SOLUTION: Based on that a conveyance amount of when a sheet is conveyed by both of first conveying means and second conveying means is the conveyance amount which is a weighted mean of the conveyance amount of when the sheet is conveyed by the first conveying means alone and the conveyance amount of when the sheet is conveyed by the second conveying means alone when a weighting factor is difficulty of slip against the sheet, one of conveyance amounts is calculated from any two of: the conveyance amount of when the sheet is conveyed by both of the first conveying means and the second conveying means; the conveyance amount of when the sheet is conveyed by the first conveying means alone; and the conveyance amount of when the sheet is conveyed by the second conveying means alone, and the correction value is set from the calculated conveyance amount. |
