Ricoh LDD250, Руководство по обслуживанию

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PAPER FEED
C262/C265 6-90 SM
Recovery from Double Feed
When two sheets of paper feed through together at the registration sensor, and if
the two sheets of paper get to the double feed sensor, the machine detects a
double feed and stops paper feed.
However, if the two sheets of paper are separated before they get to the double
feed sensor and the second sheet does not get to the registration sensor, the
machine will not detect a paper jam. But when paper feed starts again, the
registration sensor detects paper almost immediately after the paper feed motor
starts (paper is already fed inside the machine, so the registration sensor detects
the paper quicker than normally). If this occurs, the paper feed motor stops until the
correct time to feed the paper into the machine, to prevent the paper from being fed
too early.
This procedure only occurs if the output from the registration sensor goes high
while the output from the feed start sensor is high (between the 184 and 289
degree points).
Recovery from double feed
1st drum position sensor
Feed start sensor
Registration Sensor
Paper Feed Motor
Registration Motor
SP6-014
1st paper feed delay
184 degrees
SP6-016
1st paper feed pulse
SP6-018
2nd paper feed delay
269 degrees
500p
2000pp
2000pps
SP6-020
Registration roller delay
SP6-027
Paper clamper timing pulse
Drum will slow down
after 80 degrees from
307 degrees
14 counts from the slit
of pressure cylinder