Controls (Dadf); Document Detection; Outline - Canon D1 Service Manual

2
Technology > Controls (DADF) > Document Detection > Outline
Start of reading of reverse
side of second document sheet
End of reading of reverse
side of second document sheet
Stop after feeding the second
document sheet to reversal
position
2 Technology > Controls (DADF) > Document Detection > Outline
Removal of idle reversal registration
loop of second document sheet and
release of re-pickup/delivery roller
Pressurization of second document
sheet delivery roller
Completion of delivery of second
document sheet and end of job
F-2-33

Controls (DADF)

Document Detection

■ Outline

This machine detects a document using either of the two methods depending on the print
mode.
• Normal print mode (other than mixed size print mode and banner paper mode)
• Mixed size print mode and banner paper mode
a. Normal print mode (other than mixed size print mode and banner paper mode)
In the normal print mode, the following four document detection functions are used:
Function
Document presence/absence Detects whether there is a document
detection on the Detects whether there is a
document on the
Last document detection Detects whether the document being
picked up is the last one.
Initial document Longitudinal Detects the length of the document
sizeabsence direction placed on the document pickup tray
detection
Lateral Detects the width of the document
direction placed on the document pickup tray.
b. Mixed size print mode and banner paper mode
In the mixed size print mode and banner paper mode, the following three document detection
functions are used:
Function Description
Document presence/ Detects whether there is a document on the document
absence detection pickup tray.
Last document Detects whether the document being fed is the last one. Last document
detection
Document length Detects the document length according to the distance
detection from the position where the read sensor (SR2) turns on
to the position where the read sensor (SR2) turns off.
Description Description
Document set sensor (SR5)
Last document detection
sensor(SR7)
Document length sensor
1/2(SR9/SR8)
Document width sensor 1/2
(PS2/PS1)
Description
Document set sensor
(SR5)
detection sensor
(SR7)
Read sensor(SR2)
2-18
T-2-7
T-2-8
2-18