Oce 3121 Technical & Service Manual page 286

(0,0)
Y
Y
(Vmax)
(Ymax)
Document
Reduced Image Composition
Reduced image composition mode may either of the following:
2-on-1 mode: in which two documents are reduced for copying on a single
1
sheet of copy paper.
4-on-1 mode: in which four documents are reduced for copying on a single
2
sheet of copy paper.
Executing these modes requires control of a combination of:- reproduction ra-
tio processing,- shift processing,- and overlay processing.
For reproduction ratio processing: a ratio is computed, based on the size of the
document and the size of the copy.
Formula for Lengthways Direction
I
a:copy paper length ÷ (document length x 2)
b:copy paper length ÷ document length
Formula for Widthways Direction
I
c:copy paper width ÷ (document width x 2)
d:copy paper width ÷ document width
If the reproduction ratio in lengthways direction and that in widthways direc-
tion are different, the smaller of the two will be selected. However, the repro-
duction ratio will be between 25% and 800%.
Shift processing and overlay processing are controlled as explained on the next
page. The table shows which modes are available in relation to different com-
binations of the RDF and the duplexing unit.
510 TSM Océ 3121
(Xmax)
(Xmax)
X X
1 2
1
2
Area to be shifted (may
Area to be shifted
(may be entire original)
be entire (document)
Original
Corner Shift
1 1 Corner Shift
(0,0)
Centre Shift
2 Center shift
Xm
Ym
xm
Ymax
Free Shift
3 Free shift
Xp
Y
1
Yp
(Ymax)
Ymax
Paper
Copy paper
(Xmax)
Xmax
Paper
Copy paper
ym
xm
ym
(Xmax)
X Xmax
1
Paper
Copy paper
Functional description