| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the problem that in print density check by a reflection type sensor, an erroneous determination that the density is low may be made even when an ink ribbon has not become thin because a density determination print portion does not enter a sensor reading range when a conveyance amount of a medium is insufficient due to, for example, aging of a structure (gear) to convey the medium, in conveying the medium into the sensor reading range after performing a print of density determination characters. <P>SOLUTION: A density is detected by moving a print medium. When determining that the density is low, the medium is re-conveyed by a conveyance amount corresponding to the density and re-reading is performed so as to prevent erroneous detection in density determination. Further, by previously adding the amount of the re-conveyance to a medium conveyance for the next measurement, no retry of density determination occurs, which prevents processing time from being longer. <P>COPYRIGHT: (C)2013,JPO&INPIT |
