Toshiba e-studio550 Service Manual page 275

16. 8. Original Size Detection
The original position base code is transmitted to the copier during the time after the feed signal is sent
until 1st original passes through the original width sensor. The original size is detected whenever
feeding an original and transmitted to the copier 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 signl is received. Altering of the tray
guide position during the operation is ignored.
(2) Width direction size
The status of the original width sensor 1~3 are stored when the leading edge of an original reaches
the position 10mm 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 7mm further from the read sensor, the
original size is decided by considering the information whether or not the original length sensor is
ON, original position base code and status of the original width sensor 1~3. Then it is transmitted to
the copier. However, when the original length sensor 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 feed motor pulses counted during the time after the original is idle reversed until it
passes through the original length sensor and transmitted to the copier.
e-STUDIO550/650/810 RADF 16 - 38 JUNE 2002 © TOSHIBA TEC