| 摘要 |
PROBLEM TO BE SOLVED: To perform high quality processing as much as possible to an elongated workpiece.SOLUTION: A servo device includes: mark length error calculation means 22 for calculating an error in a gap of a mark based on a detection signal S(k) of a mark sensor; and a first correction part (correction value calculation means 23 and cam data change means 26) for changing cam data so that a peripheral speed of a conveyance roll and a peripheral speed of a processing roll become equal to each other in a synchronous section including a moment of processing with a tool during one revolution of the processing roll and that the processing roll makes one revolution during conveyance by a distance of the gap of the mark by accelerating and decelerating the processing roll in a non-synchronous section according to the error in the gap of the mark. |
