Riso V8000 Series, Technical Manual

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[13 - 2]
CHAPTER 13. AF SCANNING SECTION
Mechanism
1. AF Original Set Mechanism
When the original is placed along the original guide fence and pushed against the original stopper, the AF
original detection sensor is activated (light path open) and the display on the panel changes to “Ready to
make master.”
Following a preset interval, the AF read pulse motor reverses to lower the original pickup roller in the
direction indicated by the arrow, and withdraw the original stopper upward. (The one-way clutch
incorporated between the original registration roller gear and the original registration roller shaft prevents
the original registration roller from rotating during this process.)
Once the original pickup roller has descended to push against the original, the original pickup roller and
original stripper roller rotate in the original transport direction, and a single original is fed forward by the
action of the original stripper roller and original stripper pad. This activates the AF original registration
sensor (light path blocked), and the edge of the original is stopped by the stationary original registration
roller.
Once a preset interval has elapsed following activation of the AF original registration sensor, the AF read
pulse motor operates in the forward direction.
This raises the original pickup roller while rotating the original registration roller, the two original read
rollers 1 & 2, and the original ejection roller, all of which are linked by the timing belt, in the feed direction.
The original stops briefly after it has been moved 90 mm from the original set position.
The lamp illuminates when the AF original det. sensor is activated, and the lamp carriage in the scanner
unit performs shading compensation and moves to the AF scanning position before waiting in standby.
If the START key is not pressed within 60 seconds, the lamp turns off and the lamp carriage returns to the
standby position. If the START key is subsequently pressed, shading compensation is repeated (auto
base control is also performed if the original scanning density is set to “Auto”) and scanning starts.
If the START key is pressed within 60 seconds, scanning starts immediately, provided that the original
scanning density is not set to “Auto.” If the original scanning density is set to “Auto,” the lamp carriage
returns to the standby position, shading compensation is repeated, and auto base control is performed
before scanning is begun.
Auto-base-control
position Shading
compensation area
AF scanning
position Standby position
(Home Position)
Original stopper guide
AF white roller
S1301