2.1.4. Drive Mechanism
1. Book Scanner
The book scanner motor [A] drives the scanner [B] through the timing belt [C]
and drive wire [D]. The scanner moves along the guide shaft [E].
The spring [F] pushes up the contact image sensor [G] to the exposure glass,
so that the distance from the image sensor to the exposure glass surface is
constant during scanning.
The motor speed depends on the selected resolution. For reference, the fol-
lowing table shows the speed for scanning an A4 size original.
•
Fax mode
Standard
5.65 s
Detail
5.65 s
Fine
11.30 s
•
Copy Mode
Reduction
Scan Speed (/A4)
Full Size and
Enlargement
Scan speed (/A4)
50 % reduction
2.82 s
Full size
5.65 s
65 % reduction
3.67 s
115 %
6.50 s
71 % reduction
4.01 s
121 %
6.84 s
74 % reduction
4.18 s
122 %
6.89 s
77 % reduction
4.35 s
141 %
7.97 s
82 % reduction
4.63 s
155 %
8.76 s
87 % reduction
4.91 s
200 %
11.30 s
93 % reduction
5.25 s
[A]
[D]
[C]
[E]
[B]
[F]
[G]
H521D012.wmf
DETAILED SECTION DESCRIPTIONS
May 22nd, 1995
SCANNER
2-10
