| 摘要 |
PROBLEM TO BE SOLVED: To raise the accuracy of a sheet feeding amount without raising the machining accuracy (outer diameter error, off-centered amount) of a carrying roller and a pulley for transmitting the drive to the carrying roller especially. SOLUTION: A carrying roller 1 feeds a record sheet S by every prescribed amount intermittently step by step onto a platen 11. A joint is generated on a record image when the sheet feeding amount of the roller 1 is not matched with the record width of a recording head by the outer diameter error of the roller 1 and the eccentricity of the roller 1 and pulley 5a. Here, the sheet feeding amount of the roller 1 is corrected as follows based on the data of the error and eccentricity. A correction roller 20 which can change a position for strengthening the tension of a belt 8a to a position for weakening is provided on the tension side of the belt 8a for transmitting the drive of a stepping motor 6a to the pulley 5a on the shaft of the roller 1 When the data concept shows a plus correction (a few feeding amount), the tension of the belt 8a is strengthened by the correction roller 20 and when the data concept shows a minus correction (a lot of feeding amount), the tension of the belt 8a is weakened by the correction roller 20. |
