MR-2012 MECHANICAL DESCRIPTION
4 - 2
October 2000 © TOSHIBA TEC
(*1: ON for a document length of 306 mm)
4.2 Document Size Detection Method
The size of document is found by detecting the document width by the document width sensor, and the
document length by the document length sensor. When documents of different sizes are placed in the tray,
this detection method allows the maximum size of the documents to be detected. The document size is
detected according to the timing with which the document empty sensor is turned ON, the timing with
which the document width sensor changes, and the timing with which the document length sensor changes.
The detected size is sent to the copier.
When the ADF is on standby or the document empty sensor is ON, the document width sensor is checked
every 100 ms and the value obtained is compared with that of the last time. If the value is found changed
as a result of the comparison, the document size will be detected and sent to the copier when in ADF active
mode. When this unit receives a command accompanied by a document size notice request from the
copier, it will also detect and send the document size to the copier.
The detection results of the document size sensors are listed below. (Unit: mm)
A4 series
ADF as viewed from top
Document empty
sensor
Document width
sensor
Document length
sensor
adf 04-02-01
Document width
Document length sensor (*1)
OFF
ON
129.40 - 165.99
A5R (148 x 210)
166.00 - 196.99
B5R (182 x 257)
197.00 - 233.99
A4R (210 x 297)
FOLIO (210 x 330)
234.00 - 277.99
B5 (257 x 182)
B4 (257 x 364)
278.00 - 310.00
A4 (297 x 210)
A4 (297 x 420)