| 摘要 |
The leading edge of a sheet of print media is detected as the media is advanced through the printer. In response to the detection of the media, a reference signal is generated with the encoder strip that is used to control the position of the carriage assembly. When no media is present in the printer the leading edge detector physically interrupts the drive path that the media follows through the printer. When media is advanced into the detector, the detector is deflected by the advancing media and strikes the encoder strip to generate a reference signal. The printer controller correlates the reference signal with the presence of the media leading edge to begin a counting sequence that correlates the location on the media where printing begins.
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