| 摘要 |
A detection unit that detects the width of a medium on a placement surface is mounted on a carriage, a reflection plate is formed on one end of the placement surface while the reflection plate is inclined at the placement surface, and the carriage is moved to a position in which the carriage faces the reflection plate, so that the thickness of the medium is determined based on the output of the detection unit while moving the carriage. Therefore, the thickness of the medium is detected with high accuracy without using a dedicated sensor.
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