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CHAPTER 12: FB ORIGINAL SCANNING SECTION
Mechanism
1. Original Scanning Mechanism
The FB read pulse motor drives the front and rear wire drum by timing belts with the speed reduced by two
speed reduction pulleys.
The wire drive system for the front and rear are symmetrically made.
One end of the wire is secured to the front side of the scanner unit frame and from there it goes around pulley
No.2 mounted on the mirror carriage. It then goes around the pulley fixed on the front side of the scanner unit
frame and then wound on wire spool pulley located at the back of the scanner unit. From the wire spool pulley,
the wire is attached onto the lamp carriage. It then continues to go around the pulley No.1 on the mirror
carriage and finally the other end is fixed on the frame of the scanner unit.
The lamp carriage is mounted with one original illumination lamp, a reflector, a lamp inverter, and mirror No.1.
The mirror carriage is provided with mirrors No. 2 and No.3.
The mechanism uses a "full/half-rate mirror scanning" system, in which the mirror carriage moves 1/2 L mm as
the lamp carriage moves L mm in the same direction. This means that when the FB read pulse motor is
activated, the original can be scanned while maintaining a constant distance between the original and the lens
on the CCD assembly mounted on the scanner unit.
The original on the scanner table illuminated by the lamp is reflected via mirrors No.1, 2, and 3, and the
scanned image is then focused onto the CCD by the lens on the CCD assembly.
Pulley 2
DANKA AUSTRALIA PTY. LTD.
Mirror carriage
[ 12 - 2 ] - Rev. 0.2
FB read pulse motor
Lamp carriage
1201
RZ9 Series
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