| 摘要 |
The values of the detection signals of a record medium and the placement face thereof detected as a recording head moves from one end of the record medium to an opposite end are stored. A predetermined threshold value is found based on a profile found from the stored values of the detection signals. Both ends of the record medium are determined according to the threshold value and the width of the record medium is found. Accordingly, the threshold value matching the used record medium can be set, so that an easy determination can be made as to whether or not change of the detection signal exceeding the threshold value occurs and change of the detection signal falling below the threshold value occurs, and the width of the record medium can be found accurately.
|
