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MX-LCX1 OPERATIONAL DESCRIPTIONS 5 – 1
Service Manual
[5] OPERATIONAL DESCRIPTIONS
1. Lift Operation
When the power to the main unit is turned ON with the tray at a
midway position (that is, a position where both the upper limit sen-
sor [LUD] and lower limit sensor [LDD] are OFF) or with the tray at
the lower limit position (where the lower limit sensor LDD is ON),
the main unit issues a lift-up request and, in response, the lift motor
is turned ON to lift the tray.
If the Paper-on-tray sensor (LPED) turns ON within 800 encoder
pulses of the start of tray lift, the lift motor is temporarily turned OFF
to stop the tray, and then the paper feed solenoid is turned ON to
lower the pick roller. Subsequently, the lift motor is turned ON, and
the tray is lifted to and stopped at a position where the upper limit
sensor (LUD) is turned ON.
If the Paper-on-tray sensor (LPED) does NOT turn ON within 800
pulses of the start of tray lift, the paper feed solenoid is turned ON
with the lift motor remaining ON, and the pick roller is lowered. The
lift motor stops when the tray reaches a position where the upper
limit sensor (LUD) is turned ON, and subsequently the paper feed
solenoid is turned OFF.
Lift operation is not performed if the power to the main unit is turned
ON with the tray at a position where it can feed paper.
When the tray is drawn out, it lowers by its own weight.
midway position (that is, a position where both the upper limit sen-
sor [LUD] and lower limit sensor [LDD] are OFF) or with the tray at
the lower limit position (where the lower limit sensor LDD is ON),
the main unit issues a lift-up request and, in response, the lift motor
is turned ON to lift the tray.
If the Paper-on-tray sensor (LPED) turns ON within 800 encoder
pulses of the start of tray lift, the lift motor is temporarily turned OFF
to stop the tray, and then the paper feed solenoid is turned ON to
lower the pick roller. Subsequently, the lift motor is turned ON, and
the tray is lifted to and stopped at a position where the upper limit
sensor (LUD) is turned ON.
If the Paper-on-tray sensor (LPED) does NOT turn ON within 800
pulses of the start of tray lift, the paper feed solenoid is turned ON
with the lift motor remaining ON, and the pick roller is lowered. The
lift motor stops when the tray reaches a position where the upper
limit sensor (LUD) is turned ON, and subsequently the paper feed
solenoid is turned OFF.
Lift operation is not performed if the power to the main unit is turned
ON with the tray at a position where it can feed paper.
When the tray is drawn out, it lowers by its own weight.
2. Paper Feed Operation
Paper feed operation can be performed if the tray is stationary at a
position where it can feed paper (with the upper limit sensor [LUD]
being ON) and there is paper in the tray.
When paper feed takes place, the transport motor (LPFM), the
transport clutch (LTRC), the paper feed clutch (LPFC), and the
paper feed solenoid (LPFS) operate with the following timings:
position where it can feed paper (with the upper limit sensor [LUD]
being ON) and there is paper in the tray.
When paper feed takes place, the transport motor (LPFM), the
transport clutch (LTRC), the paper feed clutch (LPFC), and the
paper feed solenoid (LPFS) operate with the following timings:
When the transport clutch (LTRC) turns ON with the transport
motor (LPFM) is ON (rotating), the transport roller starts rotating.
When the paper feed clutch (LPFC) turns ON in this state, the
paper feed and take-up rollers start rotating.
When the paper feed solenoid (LPFS) turns ON, the take-up roller
is pushed down to press paper.
motor (LPFM) is ON (rotating), the transport roller starts rotating.
When the paper feed clutch (LPFC) turns ON in this state, the
paper feed and take-up rollers start rotating.
When the paper feed solenoid (LPFS) turns ON, the take-up roller
is pushed down to press paper.
Paper feed time chart (with acceleration)
*1:
Operation stops only if the main unit synchronization signal is output.
When operation is stopped, the ON/OFF timing for each load is delayed by the stoppage time because each timer is suspended during the
stoppage.
To ensure efficient job processing, operation is not stopped under normal conditions.
Operation stops only if the main unit synchronization signal is output.
When operation is stopped, the ON/OFF timing for each load is delayed by the stoppage time because each timer is suspended during the
stoppage.
To ensure efficient job processing, operation is not stopped under normal conditions.
Lift operation (where LPED turns ON within 800 encoder
pulses of the start of lift operation)
pulses of the start of lift operation)
(lift motor output)
(lower limit sensor)
(upper limit sensor)
(paper-on-tray sensor)
(solenoid)
(encoder signal)
200 msec
Within 800 pulses
LDD
LLM
LUD
LPED
LPFS
LRE
Lift operation (where LPED does NOT turn ON within 800
encoder pulses of the start of lift operation)
encoder pulses of the start of lift operation)
(lift motor output)
(lower limit sensor)
(upper limit sensor)
(paper-on-tray sensor)
(solenoid)
(encoder signal)
LDD
LLM
LUD
LPED
LPFS
LRE
800
Accelerating speed
Start of job
Catch-up control
Catch-up control
Clearance-between-papers
control timer
control timer
Clearance-between-papers
control timer
control timer
PIC timer
Paper feed clutch
OFF timer
OFF timer
Start of 1st
paper feed
paper feed
Start of 2nd
paper feed
paper feed
Start of 3rd
paper feed
paper feed
Paper feed clutch
OFF timer
OFF timer
PIC timer
Process speed
LPFM
(transport
motor)
(transport
motor)
LPFD
(transport
sensor)
(transport
sensor)
LPFC
LTRC
(paper feed
clutch)
clutch)
(transport
clutch)
clutch)
TRC
(main unit
synchronization
signal)
(main unit
synchronization
signal)
LPFS
(paper feed
solenoid)
(paper feed
solenoid)
suspended
on
off
off
on
off
off
on
off
off
on
off
off
on
off
off
*1
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