Ricoh DS5330 DOCUMENT FEEDER
DOCUMENT FEEDER
1 February 1994 OVERALL MACHINE INFORMATION
1. OVERALL MACHINE INFORMATION
1.1 SPECIFICATIONS
Original Size and Weight: - Thin original mode -
Maximum 11" x 17"/A3
Minimum 5
Weight 11 to 34 lb/41 to 128 g/m
- Thick original mode Maximum 11" x 17"/A3
Minimum 5
Weight 14 to 34 lb/52 to 128 g/m
- Auto reverse mode Maximum 11" x 17"/A3
Minimum 8
Weight 17 to 28 lb/64 to 104 g/m
Original Feed: Automatic feed — ADF mode
Manual feed one by one — SADF mode
" x 8
1/2
" x 8
1/2
" x 11"/A5 sideways
1/2
"/A5 sideways
1/2
"/A5 sideways
1/2
2
2
2
Original Table Capacity: 35 sheets (17 lb/64 g/m2)
Maximum thickness of stacked originals:
3.4 mm
Original Set: Face up, front side. First sheet on top.
Original Transport: One flat belt
Copy Speed: - One sided mode -
20 copies/minute for 8
" x 11"/
1/2
A4 sideways (1 to 1 copy)
- Auto reverse mode -
2 copies/minute for all sizes
Power Consumption: 24 W
Dimensions (W x D x H): 27.2" x 20.4" x 4.2"/690 x 519 x 107 mm
Weight: Approximately 21.4 lb/9.7 kg
Nonrecommended Paper: The following types of paper cannot be used
with the DF.
1) Dog-eared, torn, or cre ase d paper
2) Paper with holes larger than 6 mm in
diameter
3) Damp paper
4) Coated paper (carbon paper, thermal
paper, etc.)
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OVERALL MACHINE INFORMATION 1 February 1994
5) Curled paper
6) Paper with clips or staples
7) Originals that are glued or taped together
8) Bound originals
9) Translucent paper (can be used in SA DF
mode)
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1 February 1994 OVERALL MACHINE INFORMATION
1.2 MECHANICAL COMPONENT LAYOUT
1
2
10
3
9
4
8
5
6
7
1. Pulse Generator Disk 6. Inverter Pawl
2. Friction Belt 7. Inverter Roller
3. Pick-up Lever 8. Transport Belt
4. Original Table 9. Pick-up Roller
5. Exit Roller 10. Feed Roller
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OVERALL MACHINE INFORMATION 1 February 1994
1.3 ELECTRICAL COMPONENT DESCRIPTIONS
SYMBOL NAME FUNCTION LOCATION
Motors
M1 Belt Drive Motor DC servomotor that drives to the transport belt
and feed-in system (pick-up roller, feed roller,
pull-out roller and relay roller).
M2 Feed-out Motor DC servomotor that drives the feed-out unit of
the DF.
Solenoids
SOL1 Pick-up Solenoid Energizes to press the pick-up lever against the
stack of originals in preparation for original
feed-in.
SOL2 Feed-in Solenoid Turns on to engage the feed-in clutch so
rotation is transmitted to the feed roller, pull-out
rollers, and relay rollers.
SOL3 Inverter Solenoid Energizes to invert the original when copying
two sided originals.
SOL4 Stopper
Solenoid
Energizes to down the original stopper of the
copier.
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11
5
14
10
15
Switches
SW1 Lift Switch Informs the CPU when the DF is lifted and also
serves as the jam reset switch for the DF.
SW2 Original Select
Switch
Sensors
S1 Original Set
Sensor
S2 Registration
Sensor
S3 Original Width
Sensor
S4 Pulse Generator
Sensor
S5 Feed-out Sensor Checks for original misfeeds and sets original
S6 ADF Position
Sensor
Selects thick original mode or thin original
mode.
Informs the copier CPU that originals have
been placed and causes the Insert Original
indicator to go out.
Sets original stop timing and measures original
length.
Determines the width of the originals. 4
Generates pulses used to measure the original
length.
stop timing when in auto reverse mode.
Informs the CPU when DF is being closed so
that APS sensor can begin checking the
original size.
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13
1
2
3
12
16
Printed Circuit Boards
PCB1 DF Main Board Controls all DF functions. 9
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1 February 1994 OVERALL MACHINE INFORMATION
PCB2 Indicator Panel
Contains operator indicators. 7
Board
1.4 OVERALL MACHINE CONTROL
Copier
Main Board
RXD
TXD
Copier IPU Board
CPU
Serial
-Parallel
Comverter
DF Main Board
TXD
RXD
ROM
CPU
Driver
IC
Driver
IC
Sensors
Switches
Solenoids
Indicators
Belt Drive
Motor
Feed-out
Motor
The DF CPU monitors the input signals fr om th e sensors and switches, and
energizes the solenoids and the indicator LE Ds direct ly. The belt drive motor
and the feed-out motor are controlled by the DF CPU through their respective
driver ICs.
Also, the DF CPU communicates with the copier using a serial interface. The
exchanged signals are shown in the tables on the next page.
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OVERALL MACHINE INFORMATION 1 February 1994
1. DF ⇒ Copier
No. Signal Name Definition
1 Original Set Originals are set on the original table.
2 Copy Start Allows the copier to start copy sequence.
3 Lift Up The DF is lifted.
4 DF Misfeed Misfeed occurs in the DF.
2. Copier ⇒ DF
No. Signal Name Definition
1 Feed-in Requests the DF to feed-in the original.
2 Feed-out Requests the DF to feed-out the or ig ina l .
3 Invert Original Requests the DF to invert the original.
4 Auto Feed Shifts the DF to the auto feed mode.
Original Stay Attempt to use DF but the original from the
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previous copy run remains on the exposure glass.
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1 February 1994 OVERALL MACHINE INFORMATION
1.5 BASIC OPERATION
1. One-sided Original Feed
When an original is inserted into the DF, the Insert Original indicator light
goes out and the DF informs the copier CPU that originals have been set.
When the Start key is pressed, the copier CPU sends the fe ed-in signal to the
DF. On receipt of this signal, the DF energizes the pick-up solenoid, the
feed-in solenoid, and the belt drive motor in order to feed-in the bottom sheet
of the original stack onto the exposure glass. The pick-up solenoid and the
feed-in solenoid remain energized until the original’s leading edge reaches
the DF registration sensor. The belt drive motor turns off 2,088 encoder
pulses after the original’s leading edge passes the DF registration sensor.
While feeding the original, the DF regi stra tion sensor and the paper width
sensor check the original size.
Shortly before the belt drive motor turns off, the DF CPU sends the copy start
signal to the copier. On receipt of the signal, the copier CPU starts the copy
cycle.
When the scanner reaches to th e r et urn posit i on , th e cop i er CPU sen ds th e
feed-out and the feed-in signals to the DF CPU in order to exchange the
original with the next original.
When the scanner comes to the r et urn posit i on aft er scan nin g th e last
original, the copier CPU only sends the feed-out signal in order to feed-out
the last original.
2. Two-sided Original Feed
Unlike one-sided original feed, the back side of the original must be copied
first to keep the originals and cop i es in th e cor rect order.
During original feed-in, the sequence is the same as for one-sided feed;
however, the DF CPU also energizes the feed-out motor and the inverter
solenoid a short time after the original’s leading edge has passed the DF
registration sensor. The belt drive motor continues to feed the original until
140 milliseconds after the original leading’s edge passes the feed-out sensor.
At this point the inverter mechanism inverts the original, in preparation for
copying the back side. Then the belt drive m ot or reve r ses an d th e or ig ina l is
fed towards the original stopper and is stopped at the correct position on the
exposure glass. The DF CPU sends the copy start signal a short time after
the original’s trailing edge has passed the feed-out sensor.
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When the scanner reaches to th e r et urn posit i on , th e cop i er CPU sen ds th e
invert original signal to the DF CPU in order to make a copy of the front side.
The original is inverted in the same way as for back side copying.
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OVERALL MACHINE INFORMATION 1 February 1994
3. Semi-automatic Document Feed
If a single original is inserted into th e or ig ina l tab le an d cop i ed , th e DF shifts
to the semi-automatic fe ed mo de and light s the Aut o Fee d ind icator. The
Auto Feed indicator remains on for five seconds after the copier main motor
stops. If another origina l is inser te d with in th at five-second period, it is
automatically fed and copied.
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1 February 1994 DETAILED SECTION DESCRIPTION
2. DETAILED SECTION DESCRIPTION
2.1 ORIGINAL FEED
2.1.1 Original Pick-up
[B]
[C]
[A]
After setting the origina l s on the or ig ina l tab le, the originals contact the feele r
[A] of the original set sensor an d cau se th e feeler to move out of the sensor.
The DF then sends the original set signal to the copier CPU to inform it that
the DF will be used. When the Start key is pressed, the pick-up solenoid [B]
is energized. The original stack is then pressed between the pick-up lever [C]
and pick-up roller [D]. The rotation of the pick-up roller advances the bottom
original.
[D]
[A]
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DETAILED SECTION DESCRIPTION 1 February 1994
2.1.2 Original Separation
[B]
[A]
[B]
[C]
[A]
The feed roller [A] and the friction belt [B] are used to feed-in and separate
the originals [C]. Only the bottom original is fed because the friction belt
prevents any other originals from feeding.
Original feed starts when the feed roller starts turning and advances the
bottom original of the stack. The feed roller moves the original past the
friction belt because the drivin g fo r ce of the feed roller is greater than t he
resistance of the friction belt. The friction belt prevents multiple feeds
because the resistance of the friction belt is grea ter than the friction between
original sheets.
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1 February 1994 DETAILED SECTION DESCRIPTION
2.1.3 Original Feed-in Mechanism
[E]
[C]
[D]
[H]
[B]
[G]
[A]
[F]
The belt drive motor [A] drives th e pick- u p rolle r [B] , th e fe ed roller [C], the
pull out roller [D], the relay roller [E], and tra nsp ort belt [F] via a feed clutch
and a gear train.
The pick-up solenoid and feed-i n [G ] solenoids are energized 100
milliseconds after the Start key is pressed. Then 200 milliseconds after the
solenoids are energized, the belt drive motor starts turning. The pulse
generator disc [H] always turns when the belt drive motor is on.
2,088 encoder pulses of the belt drive motor after the original’s leading edge
passes the registration sensor, the relay rollers and the transport belt stop
turning.
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DETAILED SECTION DESCRIPTION 1 February 1994
2.1.4 Original Size Detection
[C]
[B]
[A]
The DF determines original size (both width and length) through the use of
the original width sensor [A, rear of DF], registration sensor [A, center of DF],
and pulse generator sensor [B]. The original’s length is calculated by
counting the number of pulses from the pulse generator [C] while the
registration sensor is on.
Original size detection is necessary for the feed-in/feed-out timing of the DF.
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1 February 1994 DETAILED SECTION DESCRIPTION
2.1.5 Original Stopping Mechanism
[A]
[B]
- Original Stopper The original stopper [A] is used to align the edge of the original with the right
original scale when the thick original mode is selected.
When the thin original mode is selected, the original stopper solenoid [B] is
energized 200 milliseconds afrter the original’s leading edge passes the
registration sensor and thus the original stopper is held down until the original
is stopped on the exposure glass.
This is to prevent damaging the original’s leading edge against the original
stopper.
NOTE: a) Before the original stopper moves down to feed out the original
from the exposure glass, the be lt dr ive motor reverses, pauses
slightly, and then turns forward. This is to prevent the original’s
leading edge from being caught between the original stopper and
the exposure glass.
b) The speed of the belt drive m otor drops to 1,300 rpm f r om 2,500
rpm 1,812 pulses after the original’s leading edge passes the
registration sensor. This makes it easier for the mechanism to
stop the original at the correct position on th e exp osur e glass.
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DETAILED SECTION DESCRIPTION 1 February 1994
[A]
- Original Select Switch This document feeder has two dif fe r en t ways of st op pin g orig inal at the
correct position on the exposur e gla ss. The y ar e calle d th e "thin original
mode" and the "thick orig ingal mode". The mode used is determined by the
original select switch [A].
1. Thin Original Mode
The original is stopped at the correct position on the exposure glass based
on encoder pulse count. The belt dr ive m ot or sto ps 2, 088 encoder pulses
after the original’s reading edge passes the registration sensor at the
one-sided original mode. When the original is inverted in the inverter section,
the belt drive motor stops 422 encoder pulses after the original’s trailing edge
passes the feed-out sensor. (Exact timing depends on registration
adjustment.) Thin original mode is selected at the factory.
2. Thick Original Mode
When the thick original mode is selected, the original is aligned against the
original stopper. The belt drive motor stays on 21 encoder pulses longer than
when in the thin original mode. When the original is inverted, the belt drive
motor continues to reverse for 52 encoder pulses longer than when in the thin
original mode, and then turns forward for 188 encoder pulses. This forces the
original against the original stopper and th us aligns the edge of the original
with the original stopper.
NOTE: The thick original mode should be used when the customer requires
more correct leading edge registration adjustment and/or complains
of skewed copies. The thin original mode is to prevent the thin
original’s from being bent since they do not have great stiffness.
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1 February 1994 DETAILED SECTION DESCRIPTION
2.1.6 Original Inversion Mechanism
[D]
[C]
The two sided originals are
inverted in the feed-out unit.
1) When the Start key is
pressed, the two sided original
is fed into the feed-in un it,
passing over the DF
registration sensor [A]. The
feed-out motor [B] and the
inverter solenoid [C] turn on
200 milliseconds after the
original’s leading edge passes
the registration sensor. When
the inverter solenoid turns on,
the inverter pawls [D] rotate
counterclockwise.
[B]
[D]
[A]
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DETAILED SECTION DESCRIPTION 1 February 1994
2) The original is passes over the
exposure glass [A] and feeds
into the feed-out unit.
[A]
3) The original is directed onto
the exposure glass again by
the inverter pawls. The belt
drive motor now reverses 140
milliseconds after the feed out
sensor [B] turns on. The
transport belt then moves the
original toward the original
stopper.
When the original leading
edge reaches the original
stopper, the belt drive motor
stops. At the same time, the
feed-out motor and the
inverter solenoid turn off.
4) After the reverse side of the
original is exposed, the belt
drive motor, the feed-out
motor, and the inver te r
solenoid turn on, and the
original is fed into the inverter
section. (This is the same as
step 2 above.)
[B]
5) The original is fed onto the
exposure glass again as in
step 3 above. The front side of
the original is then copied.
6) After the front side of the
original has been exposed, the
original is fed out from the DF.
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1 February 1994 DETAILED SECTION DESCRIPTION
2.1.7 Original Feed-out Mechanism
[A]
[D]
[C]
[B]
The exit rollers [A] are driven by inverter motor [B]. When the document
feeder receives the feed out signal from the copier, the transport belt and the
exit rollers start turning simultaneously. The transport belt carries the original
to the inverter rollers [C] and the exit rollers take over the original feed-out.
When the original’s trailing edge passes the feed-out sensor [D], the feed-out
motor drops to half of its normal speed for 220 milliseconds and then stops.
The lower speed prevents uneve n sta cking of originals. For double letter size
originals, the feed-out motor speed does not change due to the length of the
originals.
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