| 摘要 |
[Problem] To provide a sensor level adjustment device for a printer, wherein it is possible to automatically adjust, in a short period of time, the output level of optical sensors (24, 25, 26) showing variations in characteristics instead of manually adjusting the output level. To also provide a sensor level adjustment method. [Solution] Attention was focused on obtaining the optimal combination of the amount of luminescence of light-emitting elements (24A, 25A, 26A) and the light-receiving sensitivity of light-receiving elements (24B, 25B, 26B). The present invention is characterized in that the amount of luminescence of the light-emitting elements (24A, 25A, 26A) and the light-receiving sensitivity of the light-receiving elements (24B, 25B, 26B) are set in multiple stages, the combinations of the amounts of luminescence and the light-receiving sensitivities are sequentially outputted to the optical sensors (24, 25, 26), the combination of the optimal values of the low level reference values or the combination of the optimal values of the high level reference values of the optical sensors (24, 25, 26) is selected, and the optical sensors (24, 25, 26) are set to the amount of luminescence and the light-receiving sensitivity of the selected combination.
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