4
Measure the distance from each copy paper lead edge and the
image (scale) edge, and obtain RRC-A and RRC-B from the for-
mulas below.
If the RRC-A preset value is not proper, the image lead edge
varies in different magnification ratios. The RRC-B value is the
preset value used for adjusting ON timing of the RRC in order
to fit the drum image edge and the transfer paper edge.
•
L1: Lead edge shift at 200% (mm)
•
L2: Lead edge shift at 100% (mm)
•
RRC-A = 2.122
×
(L1 – L2)
•
RRC-B = 11.111
×
L2 – 5.556
×
L1
5
Enter the RRC-A value and the RRC-B value obtained from the
above formulas with the 10-key pad and press the program ( P )
key to store it.
6
Make copies at 200%, 100% and 50% and check the variations in
zooming ratios. (About 1.0mm)
If there are considerable variations, repeat the above procedures
from
3
.
7
Make a normal copy to check that the lead edge image loss is
within 0
∼
3mm. If not, change the RRC-B value and adjust again
until the image loss is within the above range. (The greater the
value is, the smaller the image loss is.)
(Note) The above image loss adjustment is effective only for
the simulation and the adjustment value is not the
final adjustment value.
8
Set the scale and an A3 (11
″
×
17
″
) paper on the original table as
shown in the figure at right.
L2
50
20
10
30
40
60
70
10
20
30
L1
End of scale image
End of scale image
full-size(100%) copy
Enlarged(200%) copy
10
20
30
40
50
60
70
Image loss
0~4mm
Full-size(100%) copy
10 20 30 40 50 60 70 80 90 50 100 110 120130 140
Scale
A3-size(11" x 17")
blank paper
50mm
8 – 16
