Ricoh ST26 Service Manual
20-BIN SORTER STAPLER
(Machine Code: A554)
13th January 1995 SPECIFICATIONS
1. SPECIFICATIONS
Paper Size for Bins: Sort or stack mode:
Maximum: A3, 11" x 17"
Minimum: A5, 51/2" x 81/2" lengthwise
Staple mode:
Maximum: A3, 11" x 17"
Minimum: B5, 81/2" x 11"
Paper Weight for Bins: Sort mode:
52 - 93 g/m2, 14 - 24 lb
Stack mode:
64 - 93 g/m2, 17 - 24 lb
Staple mode:
52 - 80 g/m2, 14 - 21 lb
Number of Bins: 20 bins + proof tray
Stapler
20-bin Sorter
Bin Capacity: Sort mode: 30 sheets (A4, 81/2" x 11")
15 sheets (A3, 11" x 17")
Stack mode: 15 sheets
Proof tray - 100 sheets
(52 – 80 g/m2, 14 – 21 lb)
- 50 sheets
(81 – 128 g/m2, 22 – 34 lb)
- 30 sheets
(129 – 157 g/m2, 35 – 42 lb)
Stapler Capacity: A4, 81/2" x 11" or smaller: 2 – 20 copies
B4, 81/2" x 14" or larger: 2 – 10 copies
Stapling Position:
(Horizontal)
a
b
(Diagonal)
a
b
a = b
= 6 ± 3 mm
= 0.24" ± 0.12"
1
a = 16 ± 3 mm
= 0.63" ± 0.12"
b = 10 ± 3 mm
= 0.39" ± 0.12"
SPECIFICATIONS 13th January 1995
Staple Replenishment: Cartridge exchange
(3,000 staples/cartridge)
Power Source: DC 24V, 5V (form the copier)
Power Consumption: 34 W
Dimensions:
(W x D x H)
412 x 600 x 690 mm
(16.2" x 23.6" x 27.1")
Weight: About 25 kg, 55.1 lb
(Main Frame: 22 kg, 48.5 lb
Mounting Frame: 3 kg, 6.6 lb)
2
13th January 1995 COMPONENT LAYOUT
2. COMPONENT LAYOUT
2.1 MECHANICAL COMPONENT LAYOUT
1
11
12
10
13
2
3
4
5
6
7
8
Stapler
20-bin Sorter
1. Proof Tray
2. Proof Tray Exit Rollers
3. Vertical Transport Rollers
4. Turn Gate
5. Bin Transport Belt
6. Bin Transport Roller
7. Bin Exit Roller
9
8. Stapler
9. Grip Assembly
10. Bin Support Block
11. Bins
12. Suppor t Bin
13. Jogger Bar
3
10
COMPONENT LAYOUT 13th January 1995
2.2 DRIVE LAYOUT
22
21
20
19
18
17
16
15
14
4. Roller Drive Motor Pulley
23
1
2
13
12
11. Bin Lift Motor Pulley
3
4
5
6
7
8
9
11
3. Rear Roller Drive Belt
2. Proof Tray Exit Roller
Pulley (Rear)
(Proof Tray Exit Roller)
19. Proof Tray Exit Roller
Pulley (Front)
18. Front Roller Drive Belt
17. Vertical Transport
Drive Pulley
15. Bin Transport Drive Gear
14. Bin Transport Belts
8. Bin Lift Drive Belt
7. Bin Lift Gears
6. Bin Lift Gear/Pulley
12. Rear Bin Lift Wire
9. Rear Bin Support
Block
10. Jogger Motor Pulley
13. Lower Jogger Drive Belt
21. Bin Drive Shaft
20. Front Bin Lift
Pulley
16. Front Bin Lift
Wire
22. Front Bin
Support Block
5. Jogger Drive Shaft
1. Upper Jogger
Drive Belt
23. Jogger Bar
4
13th January 1995 COMPONENT LAYOUT
2.3 ELECTRICAL COMPONENT DESCRI P TI ON
Refer to the electrical compone nt layou t on the reverse side of the Poin t to
Point diagram (on waterproof paper).
Symbol Name Function
Motors
M1 Bin Lift
M2 Jogger
M3 Grip
M4 Stapler Feeds the staples and drives the stapler hammer. 12
M5 Roller Drive
Circuit Board
PCB1 Main Control Controls all sorter stapler functions. 18
Solenoid
SOL 1 Turn Gate
Sensors
S1 Bin Lift Timing -1
S2 Bin Lift Timing -2
S3 Jogger H.P.
S4 Paper
S5 Bin (LED)
S6 Bin (Photo transistor)
S7 Grip H.P.
S8 Bin H.P.
S9 Bin Exit Detects paper jams at the bin exit area. 5
S10 Proof Tray Exit Detects paper jams at the proof tray exit area. 4
S11 Roller Drive Timing
Lifts and lowers the bins via a belt, gears, and
wires.
Drives the jogger bar to jog the copies against
the front side plate.
Drives the grip assembly into the bin to grip the
copies and bring them to the stapling position.
Drives the proof tray exit, vertical transport
rollers, and bin transport belts.
Opens and closes the turn gate to direct the
copies into either the proof tray or the bins.
Monitors the rotation of the bin lift motor by
detecting the timing disk.
Controls the stop timing of the bin lift motor so
that the bin lift timing sensor no. 1 can detect the
timing disk properly.
Detects whether the jogger bar is at the home
position.
Detects whether there are any copies under the
hammer.
Detects whether there is any paper in the bins
(light emitting element).
Detects whether there is any paper in the bins
(light receiving element).
Detects whether the grip assembly is at the
home position.
Detects whether all the bins are in the down
(home) position.
Monitors the roller drive motor speed by
detecting the timing disk.
Index
No.
23
20
13
1
Stapler
20-bin Sorter
6
24
25
19
8
3
17
16
15
2
5
COMPONENT LAYOUT 13th January 1995
Symbol Name Function
Switches
SW1 Upper Lift Limit
SW2 Wire Tension
SW3 Front Door Cuts the 24 Vdc line when the front door is open. 14
SW4 Sorter Stapler Set
SW5 Staple End Detects the staple end condition. 10
SW6 Staple Guide Detects whether the staple guide plate is closed. 9
SW7 Staple H.P.
The bin lift motor stops when this switch detects
the upper limit position of the bins.
The bin lift motor stops when this switch detects
the lower limit position of the bins through the bin
lift wire tension.
Cuts the 24 Vdc line when the sorter stapler unit
is open.
Detects whether the staple hammer is at the
home position.
Index
No.
22
21
7
11
6
13th January 1995 BASIC OPERATION
3. BASIC OPERATION
3.1 NORMAL MODE AND SORT/STACK MODE
[E]
[C]
[G]
[F]
[B]
Stapler
20-bin Sorter
[A]
[D]
Copies [A] exiting the copier pass t hro ug h the entra nce guide plates to the
turn gate area. The turn gate [B] will sen d copies either to the proof tray or to
the bins, depending on the mode.
- Normal mode -
In this mode, copies pass from the turn gate sectio n to the proo f tray.
When the copier signals the S/S CPU to start the motor, the roller drive motor
[C] rotates all the rollers in the S/S pap er path . At the same time , th e tu rn
gate solenoid [D] is energized and the turn gat e tu rns clockwise . The turn
gate directs copies to the proof tra y [E] through the vertical transport and
proof tray exit rollers [F and G].
7
BASIC OPERATION 13th January 1995
- Sort/Stack mode -
[C]
[G]
[H]
[A]
[I]
[B]
[D]
[E]
[F]
In this mode, copies pass from the turn gate section to the bins.
The turn gate solen oid [A] stays off and th e turn gate [B] stays up when t he
S/S roller drive motor [C] starts rot at ing. The turn gate directs copies
downward and the bin transport belt [D] exits copies t o th e bin through the bin
transport and bin exit rollers [E and F].
The jogger bar [G] th en moves th e copy towards the front and jo gs it against
the front side plate to square the copies.
The bin lift motor [H] turn s on whe n th is jogg ing operation is almost finished
and advances the bin one ste p up along the bin cam track [I]. The bin lif t
motor stops at the proper time to posit ion the next bin at the bin exit area.
This bin movement is done fo r each co py in sort mode and for the final copy
of each original in stack mode.
The up and down movement of th e bins in both sort and stack modes is the
same as for other moving bin type sorters.
8
Figure 4
13th January 1995 BASIC OPERATION
3.2 STAPLE MODE
[A]
Figure 1 Figure 2
[B]
Figure 3
When the final set of copies has been jogged in sort mode, the staple unit
staples the stacked co pie s as f ollo ws:
Figure 1:
If the final copy is fed out to a bin other than the first one, all the bins lower to
the home position (the first bin is positioned at the bin exit area ). The jogger
bar [A] moves towards th e fro nt to jog the copies stacked in th e first bin. Then
it stops 15 mm away from the side edge of the pa pe r.
Figure 2:
The bins move one step up to place the first bin at the stap ling posit ion.
Stapler
20-bin Sorter
Figure 3:
The grippers [B] move forward, an d grip the copies.
Figure 4:
The grippers bring the copies up unde rne at h the sta pler. At the same time,
the jogger bar jogs the cop ies stacked in the second bin to pre pa re for the
next stapling operation . The n th e jog ger bar returns to the position 15 mm
away from the side edge of th e pa pe r.
9
BASIC OPERATION 13th January 1995
Figure 5
Figure 6
Figure 5:
The stapler staples th e cop ies.
Figure 6:
The copies are pushed back int o the bin. Then the grippe rs ope n an d ret urn
to the home position.
The bins move one step up for the next stapling opera tio n.
When the final set of copies is stapled, the bins lower and stop when the final
bin that was used just before the entire stapling operation is positione d at the
bin exit.
There are two staple modes.
1) Automatic stapling:
In ADF/ARDF mode, when the user selects sta ple mode before pressing
the Start key, the copies will be delivered to each bin and stapled
automatically.
2) Manual stapling:
In sort mode, after copies are sort ed in the bins, the copie s will be stap led
when the user presses the sta ple key after copying. In stack mode,
manual stapling is impossible.
10
[B]
13th January 1995 TURN GATE SECTION
4. TURN GATE SECTION
[B]
[E]
[E]
[C]
[A]
[A]
[D]
The turn gate directs copies to the pro of tray or to the bins depe nding on the
mode selected.
Stapler
20-bin Sorter
In the normal mode, the turn gat e sole no id [A] turns on together with the
roller drive motor when the copier signals the S/S CPU to sta rt th e motor. The
turn gate [B] rotates clockwise to dire ct cop ies up ward [C] th rou gh the vertical
transport section to th e proof tray. The turn gate solen oid stays on during the
copy cycles, and turns off when the proo f tra y exit sensor detects the trailing
edge of the last copy and the S/S CPU receives the signal from the copier to
stop the motor.
In the sort, stack, or staple mode, the turn gate solenoid stays off to keep the
turn gate up so that copies are direct ed down ward [D] to the bin transport
section.
The solenoid lever [E] is bent at a righ t an gle to en sure tha t the lever moves
only if the solenoid switches fro m on to off, or from off to on.
11
[F]
ROLLER DRIVE AND CONTROL 13th January 1995
5. ROLLER DRIVE AND CONTROL
[G]
[E]
[I]
[C]
[J]
[B]
[D]
[K]
[A]
[H]
[L]
The roller drive motor (a stepper motor) [A ] drive s the proo f tra y exit rolle rs
[B], vertical transport rollers [C] , bin transport belts [D], bin tran sport rollers
[E], and bin exit rollers [F] via the front and rear roller drive be lts [G and H],
pulleys, and gears, as shown above.
The roller drive motor turns on when the copier signals the S/S CPU to switch
the motor on. When the proof tra y exit sen sor [I] (in the normal mode) or the
bin exit sensor [J] (in the sort/stack/staple mode) detects the trailing edge of
the final copy, the S/S CPU info rms the copie r t hro ugh th e fib er cab le an d the
interface PCB. The n the copier signals the S/S to stop the roller drive motor.
The S/S CPU monitors the roller drive motor speed by counting pulse s from
the timing disc [K] through the roller drive timing sensor [L ].
12
13th January 1995 ROLLER DRIVE AND CONTROL
To feed copies out as fast as possible, th e S/ S CPU con tro ls t wo mot or
rotation speeds.
The normal speed depends on the copier’s p ape r tra nsp ort speed. The S/S’s
paper transport speed is almost the same as bu t sligh tly fa ster than the
copier’s.
In the normal mode, the roller drive motor changes the paper tra nsp ort speed
from normal to high (500 mm/s, fixed) when the S/S CPU receives the pape r
exit signal from the copier. The roller drive motor changes the paper transp ort
speed from high to normal 100 milliseconds aft er th e pro of tray exit senso r
detects the trailing edge of the copy.
In the sort/stack/sta ple mo de, the roller drive motor also changes the paper
transport speed from normal to high and the n from high to normal. The timin g
is the same as in the normal mode, bu t the bin exit sensor is used to dete ct
the trailing edge instead of the pro of tray exit sensor. The high speed is
almost double the normal speed, and it changes depending on the paper size
(900, 960, or 1 ,0 00 mm/ seco nd).
Stapler
20-bin Sorter
13
[M]
BIN DRIVE AND CONTROL 13th January 1995
6. BIN DRIVE AND CONTROL
[G]
[J]
[F]
[I]
[H]
[L]
[E]
[K]
[B]
[A]
[C]
[D]
[C]
[E]
All the 20 bins [A] and the support bin [B] are piled up on the bin support
blocks [C]. The front and rea r bin support blocks are connecte d by th e bin lift
shafts [D], the ends of which are fixed to the bin lif t wires [E ] as shown. The
bin lift motor [F] (dc motor) drives the bin lift wires thro ug h the bin lif t drive
belt [G], bin lift gears [H], an d th e bin lift gear/pulley [I]. Then the bins are
driven up and down along the front an d rea r bin cam tracks [J].
The S/S CPU controls the amount of bin lift motor rotation by monitorin g the
pulses from the timing disc [K] th rough the bin lift timing sensors 1 and 2 [L
and M]. Bin lift timing sensor 1 (blue con ne cto r) is use d for coun tin g th e
timing pulses. Bin lift timing sensor 2 (white connector) is used to determin e
the motor stop timing so that the edge of the timing disc slots is not
positioned at timing sensor 1.
[C]
14
13th January 1995 BIN DRIVE AND CONTROL
[A]
[G]
[D]
[E]
Stapler
20-bin Sorter
[F]
[B]
[C]
If the bin lift motor [A] fails t o sto p the bin s at the hig he st po sitio n, the re ar
end of the left bin lift shaft [B] activate s the upper lift limit switch [C] (which is
a normally-closed type) to open the 24 Vdc line to th e bin lift mot or.
The front right bin suppo rt blo ck [D] ha s an act uator on its underside. When
all the bins are lowered and the first bin is positioned at the bin exit are a, the
actuator activates the bin home position sensor [E] and the bin lift motor turns
off.
If the bin lift motor fails to stop lowering the bins at the bin home positio n, the
rear bin lift wire [F] slackens. The n th e wire tension switch [G] (which is a
normally-open type) is deactivat ed , which ope ns th e 24 Vdc line to the bin lift
motor.
15
BIN DRIVE AND CONTROL 13th January 1995
[A]
[B]
[E]
[C]
[D]
Fig. 1
Fig. 2
[F]
Fig. 3 Fig. 4
An end fence mylar [A] is attached to each bin entra nce and an end fence
block [B] is stuck on the mylar. These are att ached with two-sided tape, as
shown in figure 1. There is a twisted spring at the rear end of the bin entrance
to raise the end fence block and mylar. Whe n the bin s are at the bin ho me
position, the support bin [C] and th e first bin [D] are positio ne d at the bend in
the bin cam track [E] as shown. The supp ort and first bins have a space
between them so that the end fence mylar can fully rise until the end fence
block stops it.
The space between the support and first bin s is at the bin entra nce section
as shown in figure 2. Since the end fence mylar is t hin , the copy exits to the
first bin over the mylar. The steep angle of the bin helps th e exit ed copy slide
back due to its own weight und er the mylar against the bin entrance.
When the bins move up along the bend of the bin cam track, the end fence
mylar and block of the first bin are pushed down by th e sup port bin, and
those of the second bin [F] rise as shown in figure 3.
When the bin lift motor stops, the first and second bins are positioned as
shown in figure 4. The lowe red end fence mylar helps to prevent the copy in
the first bin from moving out of the jogged posit ion . The end fence mylar an d
block of the second bin are ready to receive the next copy.
16
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