Ricoh PRIPORT VT 2000 Series Service Manual page 113

28 February '91
4.6 ELECTRICAL TIMING
1st Drum Position Sensor
2nd Drum Position Sensor
Paper Table Height SN
Main Motor Reversing
Master Eject Motor Reversing
Master Eject Sol.
Master Eject Clamper Sol.
Main Motor Forwarding
Master Eject Detecting SN
T1: When the Master Making key is pressed, the main motor starts rotat-
ing in reverse. At the same time the paper table drive motor also
starts rotating to lift the paper table to the proper position.
T2: When the 2nd drum position sensor is activated, the master eject mo-
tor starts rotating in reverse to drive the master eject rollers.
T3: When the drum rotates 20 degrees past the 2nd drum position sen-
sor, the master eject solenoid is energized to press the master eject
roller against the drum surface. The master eject solenoid is de-ener-
gized when the drum rotates 50 degrees more.
When the drum rotates 160 degrees after the master eject solenoid is
de-energized the master eject clamper solenoid is energized.
T4: When the drum turns 13 degrees past the first drum position sensor
actuation position, the main motor stops.
T5: 500 milliseconds after the main motor stops, the master eject clamper
solenoid turns off. Then, after a 100 millisecond-pause, the main mo-
tor starts rotation in the forward direction and stays on until the first
drum position sensor is activated.
Master Making Key "ON"
T1
T2
(SW)
50°
20°
T3
230°
( ): VT2100/VT2130/VT2150
2-86
T4
160°
500 ms
100 ms
13°
T5