Paper Feed and Transport Sequences
○Purpose:
Learning the paper feed and transport sequences to understand the timings
of printing paper transport in the machine
1. Outline
Paper is fed and transported as instructed by
the DC controller.
The DC controller has sequences according to the paper inlet, paper
outlet, and printing type (simplex or duplex).
When a print instruction is received from the main controller,
printing is executed by a sequence conforming to the print
contents.
a. Sequence of paper feed from Cassette 1 until paper ejection to
Paper ejection tray 1 in simplex printing
b. Sequence of paper feed from Cassette 1 until paper ejection to
Paper ejection tray 1 in duplex printing
These sequences are explained next.
2. Transport Sequences
This section explains the simple transport sequence and the duplex
transport sequence as typical transport sequences.
For the locations of transport rollers, sensors, and motors, see the
arrangement drawing:
1- 2. Drive related list
The transport controller of this machine
rotates when the DC controller controls each motor, clutch, or
solenoid.
Once printing operation has started, the DC
controller controls each load to rotate each transport roller. This feeds
paper from the paper inlet, transports it through the machine, and ejects it to
the paper ejection tray. If a sensor detects an error, a message is
displayed.
This machine has photosensors (14 for the
iR2270/2870 Series and 19 for the iR3570/4570 Series) for cassette paper
presence/absence detection, paper level detection, ejected paper full detection,
and jam detection.
The arrangements of transport rollers,
motors, clutches, and sensors are given below.
○Roller related list
The numbers of transport rollers and flappers
differ between the iR2270/2870 Series and the iR3570/4570
Series.
The iR3570/4570 Series has more transport
rollers and flappers because it is equipped with 3-Way
Unit-A1.
The transport roller arrangements are
as follows:
a. iR2270/2870 Series
1] Paper feed roller (Cassette 1)
[2] Transport roller (Cassette
1)
[3] Separation roller (Cassette
1)
[4] Paper feed roller (Cassette
2)
[5] Transport roller (Cassette
2)
[6] Separation roller (Cassette
2)
[7] Vertical path roller 2
[8] Vertical path idler roller
2
[9] Vertical path roller 1
[10] Vertical path idler roller
1
[11] Manual feed roller
[12] Resistor roller
(inside)
[13] Resist roller
(outside)
[14] Duplex transport roller
2
[15] Duplex transport roll
2
[16] Transfer roller
[17] Photoconductor drum
[18] Duplex transport roller
1
[19] Duplex transport rod 1
[20] Press roller
[21] Fused paper ejection
roller
[22] Fused paper ejection
rod
[23] Fusing film
[24] Paper ejection roller
[25] Paper ejection rod
b. iR3570/4570 Series
1] Paper feed roller (Cassette 1)
[2] Transport roller (Cassette
1)
[3] Separation roller (Cassette
1)
[4] Paper feed roller (Cassette
2)
[5] Transport roller (Cassette
2)
[6] Separation roller
(Cassette 2)
[7] Vertical path roller 2
[8] Vertical path idler roller
2
[9] Vertical path roller 1
[10] Vertical path idler roller
1
[11] Manual feed roller
[12] Resistor roller
(inside)
[13] Resist roller
(outside)
[14] Duplex transport roller
2
[15] Duplex transport roll
2
[16] Transfer roller
[17] Photoconductor drum
[18] Duplex transport roller
1
[19] Duplex transport rod 1
[20] Press roller
[21] Fused paper ejection
roller
[22] Fused paper ejection
rod
[23] Fusing film
[24] Tray 1 paper ejection
roller
[25] Tray 1 paper ejection rod
[26] Tray 1 paper ejection
flapper
[27] Tray 2 paper ejection
rod
[28] Tray 2 paper ejection
roller
[29] Reversing rod
[30] Reversing
roller
[31] Paper
ejection vertical path roller
[32] Tray 2 paper ejection
hopper
[33] Paper ejection vertical
path rod
[34] Duplex entrance rod
[35] Tray 3 paper ejection
flapper
[36] Duplex entrance
roller
[37] Tray 3 paper ejection
roller
[38] Tray 3 paper ejection
rod
*The blue characters indicate standards parts
for iR3570/4570 only.
Drive transmission chart
The drive transmission parts of this machine
differ between the iR2270/2870 Series and the iR3570/4570
Series.
The iR2270/2870 Series shares the driving
power of the main motor (M2) for duplex transport but the iR3570/4570 Series has
a duplex transport motor (M10) for duplex transport only.
The transport drive arrangements are as
follows:
a. iR2270/2870 Series
|
M2:
Main motor
M3:
Fusing motor
M4:
Paper ejection motor
M6:
Cassette 1 paper feed motor
M7:
Cassette 2 paper feed motor
SL1:
Cassette 1 paper feed solenoid
SL2:
Cassette 2 paper feed solenoid
CL1:
Manual paper feed clutch
CL2:
Resist clutch
CL6: Duplex transport clutch
*The green
characters indicate standard parts for iR2270/2870
only.
|
b. iR3570/4570 Series
|
M2:
Main motor
M3:
Fusing motor
M4:
Paper ejection motor
M6:
Cassette 1 paper feed motor
M7:
Cassette 2 paper feed motor
M10: Duplex transport motor
M101: Tray 2 paper ejection motor
M102: Tray 3 paper ejection motor
SL1:
Cassette 1 paper feed solenoid
SL2:
Cassette 2 paper feed solenoid
SL101: Tray 1 paper ejection flapper
solenoid
SL102: Tray 2 paper ejection flapper
solenoid
SL103: Tray 3 paper ejection flapper
solenoid
CL1:
Manual paper feed clutch
CL2:
Resist clutch
*The green characters
indicate standard parts for iR3570/4570 only.
*The blue
characters indicate standard parts for iR3570/4570 only.
Paper sensor list
The number of paper sensors differs between
the iR2270/2870 Series and the iR3570/4570 Series.
The iR3570/4570 Series has more paper sensors
because it is equipped with 3-Way Unit-A1.
The paper sensor arrangements are as
follows:
a. iR2270/2870
Series
[1] Cassette 1 paper level sensor B
(PS4)
[2] Cassette 1 paper level sensor A
(PS3)
[3] Cassette 2 paper level sensor B
(PS6)
[4] Cassette 2 paper level sensor A
(PS5)
[5] Cassette 2 paper presence/absence
detection sensor (PS2)
[6] Cassette 2 retry sensor
(PS11)
[7] Cassette 1 paper presence/absence
detection sensor (PS1)
[8] Cassette 1 retry sensor
(PS10)
[9] Manual feed paper presence/absence
detection sensor (PS7)
[10] Resist sensor (PS9)
[11] Duplex transport sensor
(PS17)
[12] Fusing paper ejection sensor
(PS13)
[13] Paper ejection sensor
(PS14)
[14] Tray 1 paper full sensor
(PS15)
b. iR3570/4570 Series
[1] Cassette 1 paper level sensor B
(PS4)
[2] Cassette 1 paper level sensor A
(PS3)
[3] Cassette 2 paper level sensor B
(PS6)
[4] Cassette 2 paper level sensor A
(PS5)
[5] Cassette 2 paper presence/absence
detection sensor (PS2)
[6] Cassette 2 retry
sensor (PS11)
[7] Cassette 1 paper presence/absence detection sensor
(PS1)
[8] Cassette 1 retry
sensor (PS10)
[9] Manual feed paper
presence/absence detection sensor (PS7)
[10] Resist sensor
(PS9)
[11] Duplex transport
sensor (PS17)
[12] Fusing paper
ejection sensor (PS13)
[13] Paper ejection
sensor (PS14)
[14] Tray 1 paper full
sensor (PS15)
[15] Tray 2
paper ejection sensor (
[16] Tray 2 paper full sensor
(PS102)
[17]
Reversing paper ejection sensor (PS103)
[18] Duplex
entrance sensor (PS103)
[19] Tray 3
paper ejection sensor (PS105)
*The blue
characters indicate standard parts for iR3570/4570
only.
a. Simplex transport
sequence
1) By receiving a print instruction from the main controller, the DC
controller drives the Cassette 1 paper feed motor (M6), main motor (M2), and
fusing motor (M3).
2) When these motors are driven, the transport rollers other than the
paper feed, resist, and duplex transport rollers start
rotating.
3) Once each motor has reached the prescribed rotation speed, the
Cassette 1 paper feed solenoid (SL1) becomes ON. Then the Cassette 1 paper feed
roller starts rotating and feeds printing paper from Cassette
1.
4) From the fed printing paper, only one sheet is separated by the
separation roller and transported into the machine to prevent
multi-feed.
5) Once the printing paper has reached the resist section, the
vertical path roller presses the printing paper with its end at the resist
roller to correct skew feed.
6) In the prescribed time after the resist sensor (PS9) detects the
front end of the printing paper, the resist clutch (CL2) becomes ON. Then the
resist roller rotates and starts transporting again the printing paper stopped
at the resist roller.
When the rear end of the printing paper has passed the resist sensor,
the resist clutch becomes OFF for the next printing paper and the resist roller
stops.
7) After passing the resist roller, the printing paper is transported
through the transfer and press rollers.
8) When the fusing paper ejection sensor (PS13) detects the front end
of the printing paper, the paper ejection motor (M4) is driven. This rotates the
paper ejection roller.
9) After passing the fuser, the printing paper passes the paper
ejection sensor (PS14) and is ejected to Copy tray 1.
10) In the prescribed time after the paper ejection sensor (PS14)
detects the rear end of the printing paper, the motors and transport rollers
stop.
If the next printing paper transport instruction is issued during
transport, similar control is executed again from step 3) without stopping the
motors.
b. Duplex transport sequence
This sequence differs between the iR2270/2870
Series and the iR3570/4570 Series.
1. iR2270/2870 Series
1) The printing paper is transported to the paper ejection roller by
steps 1) to 8) of the paper feed and transport sequence.
2) In the the prescribed time after the fused paper ejection sensor
(PS12) detects the rear end of the printing paper, the paper ejection motor (M4)
starts rotating in the opposite direction. This reverses the rotation of the
paper ejection roller.
3) At the same time when the paper ejection
roller starts rotating in the opposite direction
4) When the paper ejection roller rotates in the opposite direction,
the printing paper almost ejected to Copy tray 1 is retracted into the machine.
This reverses the printing paper.
5) The retracted printing paper is transported to the duplex
transport section by the duplex transport guide.
6) After reaching the duplex transport section, the printing paper is
transported by the duplex transport roller and its skew feed is corrected by the
resist roller.
7) Then the second print is created and ejected to copy tray 1 by
Steps 5) to 10) of the paper feed transport sequence.
2 iR3570/4570 Series
1) The
machine performs steps 1) to 7) of the single-sided feed sequence to move the print paper as far as
the pressure roller.
2)
When
the fixing/delivery sensor (PS12) detects the leading edge of print paper, the
machine performs the following operations to move the print paper to the
reversal tray of the 3-Way
Unit-A1.
∙ the tray 2 delivery motor (M101) goes on to
rotate the delivery path roller.
∙ the tray 3 delivery motor (M102) goes on to
rotate the delivery vertical path roller.
∙ the tray 1 delivery flapper solenoid (SL101)
goes on to move the tray 1 delivery flapper.
∙ the tray 2 delivery flapper solenoid (SL102)
goes on to move the tray 2 delivery flapper.
3) When
the reversal tray delivery sensor (PS104) detects the trailing edge of print
paper, the tray 3 delivery motor (M102) starts to rotate in reverse a specific
period of time thereafter to rotate the delivery roller in
reverse.
4)
When
the delivery roller rotates in reverse, the print paper on the verge of
discharge to the reversal tray is pulled back inside the machine, thus
permitting the machine to turn over the print paper.
5)
As
soon as the delivery roller starts to rotate in reverse, the tray 3 delivery
flapper solenoid (SL103) goes on to move the tray 3 delivery flapper, thus
moving the print paper as far as the duplexing/feeding
assembly.
6)
When
the duplexing assembly inlet sensor (PS103) detects the trailing edge of the
print paper, the duplexing/feeding motor (M10) goes on to rotate the
duplexing/feeding roller.
7)
The
print paper that has been moved to the duplexing/feeding assembly is moved by
the duplexing/feeding roller and made free of skew
movement.
8)
Thereafter,
the machine performs steps 5) to 10) of its single-sided feeding sequence, and
prints on the 2nd side for discharge to copy tray 1.
c. Multiple paper feed
sequence
1) When the manual paper feed clutch (CL1)
becomes on, the multiple paper feed roller starts rotating and feeds one sheet
by upward separation.
2) In the prescribed time after the resist
sensor (PS9) detects the front end of the printing paper, the manual paper feed
clutch becomes OFF and a loop is formed at the resist roller.
3) At the same time as the resist clutch
(CL2) becomes ON, the manual paper feed clutch (CL1) momentarily becomes ON
again and the resist roller transports the paper thereafter.
3. Sectional Acceleration
For fast printing, this machine increases the
transport speed in certain sections.
The transport speed is increased in the
following sections:
○Without the paper ejection option
[1] Paper feed acceleration
section
The paper feed speed is
increased to about 1.5 times the process speed.
(The speed is not increased for multiple manual paper feed. For the
first sheet from Cassette 1 the speed is about doubled.)
|
With Finisher P1
1] Paper feed acceleration section
The paper feed speed is
increased to about 1.5 times the process speed.
(The speed is not increased for multiple manual paper feed. For the
first sheet from Cassette 1 the speed is about doubled.)
[2] Reverse paper feed acceleration
section
The paper feed speed is increased to about 3.4 times
the process speed.
(The speed is not increased for paper ejection to
Tray 3.)
With Finishers Q3 and Q4
1] Paper feed acceleration section
The paper feed speed is
increased to about 1.5 times the process speed.
(The speed is not increased for multiple manual paper feed. For the
first sheet from Cassette 1 the speed is about doubled.)
[2] Post-fusing acceleration section
The paper feed speed is
increased to about 2.5 times the process speed.
[3] Buffer path acceleration section
The paper feed speed is
increased to about 2.5 times the process speed.
(The speed is not increased for saddle paper
ejection.)
[4] Reverse paper feed acceleration section
The paper feed speed is
increased to about 3.4 times the process speed.
(The speed is not
increased for paper ejection to Tray 3.)
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