Riso V8000 Series, Technical Manual

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CHAPTER 7. PAPER EJECTION SECTION
Mechanism
1. Paper Ejection Mechanism
The paper transferred from the paper drum is ejected to the paper receiving tray, as described below.
(1) The leading edge of the paper is released from the paper drum grippers while pinched between the
paper drum and the first pinch roller.
(2) The paper is guided to the paper ejection roller by the paper ejection separators.
(3) The paper is gripped between the second pinch roller and the paper ejection roller, and is guided by
the paper ejection wings before ejected onto the paper receiving tray.
The paper ejection unit safety SW confirms that the paper ejection unit is in place on the machine. The
main motor is disabled if the paper ejection unit is not in place.
Power is supplied to the paper ejection unit via the drawer connector, and the contacts of this connector
are used to determine whether the paper ejection unit is in place. (The paper ejection unit set signal is
OFF when not in place.)
The paper ejection sensor checks that the printed paper is ejected properly.
The paper ejection roller is driven by the paper ejection motor, and the rotation of the paper ejection motor
is monitored by the paper ejection limit sensor (encoder sensor).
The paper ejection wings can be manually adjusted up or down to suit the paper ejected. (Raise for
normal paper, lower for thick paper or post card.)
2. Pinch Roller Mechanism
The paper is pinched at a position of 3 mm ± 0.5 mm from the edge.
With the first pair of the pinch rollers closer together and second pair of the pinch rollers further away, the
ejecting papers are stretched out as they land on the paper receiving tray.
3. Pinch Roller Positioning Mechanism
The position of the pinch rollers change in accordance with the position of the paper guide fence on the
paper feed tray. The two pinch roller assemblies, one on the machine drive side and the other on the
machine operation side, are driven separately by different pinch pulse motors.