5) Calculate the vertical copy magnification ratio.
Vertical copy magnification ratio =
Copy image size
Original size
x 100 (%)
6) Check that the actual copy magnification ratio is within the
specified range (100
±
0.8%).
If it is out of the specified range, perform the following proce-
dures.
7) Execute simulations 48-1. (C
→
0
→
0
→
C
→
48
→
CB
→
1
→
CB)
The set vertical copy magnification ratio will be displayed in
the COPIES SELECTED display.
8) Enter a new vertical copy magnification ratio with the numeric
key and press PRINT button. The above procedure changes
the lens home position and the vertical copy magnification
ratio.
When the copy magnification ratio is set to a larger value, the
actual copy magnification ratio becomes larger.
When the copy magnification ratio is set to a smaller value,
the actual copy magnification ratio becomes smaller.
Repeat procedures 1) to 8) until the vertical copy magnification
ratio in the normal (100%) copy mode is within the specified
range.
b. Vertical copy magnification ratio adjustment (Zoom
copy)
1) Set a scale vertically on the document table as shown below:
(Use a long scale for precise adjustment.)
2) Set the copy magnification ratio to the max. level.
3) Make a copy on A4 or 8 1/2" x 11" paper.
4) Measure the length of the copied scale image.
5) Calculate the vertical copy magnification ratio.
Vertical copy magnification ratio =
Copy image size
Original size
x 100 (%)
6) Check that the actual copy magnification ratio is within the
specified range (129
±
0.9%).
If it is out of the specified range, perform the following proce-
dures.
7) Execute simulations 26-8. (C
→
0
→
0
→
C
→
26
→
CB
→
8
→
CB)
The set vertical copy magnification ratio in the zoom copy
mode will be displayed in the COPIES SELECTED display.
8) Enter a new vertical copy magnification ratio with the numeric
key and press PRINT button. The above procedure changes
the lens shift ratio and the vertical copy magnification ratio in
the zoom copy mode.
When the copy magnification ratio is set to a larger value, the
actual copy magnification ratio becomes larger.
When the copy magnification ratio is set to a smaller value,
the actual copy magnification ratio becomes smaller.
Repeat procedures 1) to 8) until the vertical copy magnification
ratio in the zoom copy mode is within the specified range.
VII.
Troubles caused by improper adjustment
c. Horizontal copy magnification ratio adjustment (Zoom
copy)
I.
Summary
The horizontal copy magnification ratio adjustment must be per-
formed in the document table copy mode and in the SPF copy
mode. In the document table copy mode, scanning speed is
changed with simulations 48-2 to adjust the horizontal copy
magnification ratio.
In the SPF copy mode, document feed speed (SPF motor rotat-
ing speed) is changed with simulations 48-3 to adjust the
horizontal copy magnification ratio.
100
110
120
130
150
140
mm
1/2mm
JAPAN
HARDDENCD
STAINLESS
Shizuoka
100
110
120
130
150
140
mm
1/2mm
JAPAN
HARDDENCD
STAINLESS
Shizuoka
110
1 0
2 0
1 0
2 0
(When a 100mm scale is used as the original.)
Paper feed direction
Reference
Comparison point
Original scale
Copy
Scale
7 – 16
