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March 2005 © TOSHIBA TEC e-STUDIO520/600/720/850 REVERSING AUTOMATIC DOCUMENT FEEDER (RADF)
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16.8 Original Size Detection
The original position base code is transmitted to the engine during the time after the feed signal is sent
until 1st original passes through the original width detection sensors (S56, S57, S58). The original size
is detected whenever feeding an original and transmitted to the engine as a code before scanning
starts.
16.8.1 Original size detection method
1) Original position base code
The tray guide width is measured and stored when the feed signal is received. Altering of the tray
guide position during the operation is ignored.
2) Width direction size
The status of the original width detection sensor 1 to 3 (S56, S57, S58) are stored when the leading
edge of an original reaches the position 10 mm further from the 1st roller after feeding has started
with the original at the pre-feeding position.
3) Feeding direction size
When the leading edge of an original reaches the position 7 mm further from the read sensor (S69),
the original size is decided by considering the information whether or not the original length detec-
tion sensor (S63) is ON, original position base code and status of the original width detection sensor
1 to 3 (S56, S57, S58). Then it is transmitted to the engine. However, when the original length detec-
tion sensor (S63) is ON at the mixed-original mode, the original size for some combinations cannot
be decided. In this case, the size is decided by taking into consideration the document feed motor
(M37) pulses counted during the time after the original is idle reversed until it passes through the
original length detection sensor (S63) and transmitted to the engine.
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