Konica Minolta bizhub C658 Service Manual page 1943

bizhub C658/C558/C458/C368/C308/C258
[1] Length sensor/1 (PS10)
[3] Length sensor/2 (PS11)
(2) Size detection in mixed original / AMS mode
(a) Detecting the width of the original
• In the mixed original mode, the original is aligned to the rear side of the document width guide plate.
• In the mixed original / AMS mode, no width is determined on the document feed tray; rather, the width is detected while the originals
are being fed.
• Three consolidation sensors are disposed at positions immediately after the paper feed section, functioning to detect the width of the
original.
(b) Detecting the length of the original
• In the mixed original/AMS mode, the length of the original is not determined on the document feed tray. But the length is calculated
and determined based on the period of time during which the before read sensor remains activated.
3.3.3 Up/down control for the document feed tray
• The document feed tray rises to feed originals.
• The lift-up motor performs the up/down control of the document feed tray.
• The document feed tray is lowered due to completion of a job, paper jam, or paper misloading.
[6]
[7]
[5]
[4]
[1] Lift-up motor (M5)
[3] Lift up lower sensor (PS3)
[5] Empty sensor (PS1)
[7] Upper limit detection actuator
(1) Preliminary up operation
• The document feed tray stops in the lower limit position during standby.
• When a job starts with the document feed tray at the lower limit position, the tray will take longer to rise until paper is fed.
• To shorten the time from the job start to end, lift the document feed tray to the document feed tray standby position in advance.
• The document feed tray standby position can be adjusted through [Administrator Settings] -> [System Settings] -> [ADF Settings].
Preliminary lift is not performed and stands by at the lower limit position if OFF is selected.
(2) Up operation
• The document feed tray stops in the lower limit position during standby.
• When an original is loaded into the tray, the empty sensor detects the original. The lift-up motor turns on when the control panel is
pressed.
• The lift-up lever moves via lift-up motor drive to lift the document feed tray to the document feed tray standby position.
• The lift-up motor is driven to lift the document feed tray to the document feed position when the Start key is pressed.
• The top surface of the original pushes up the pick-up roller. The lift operation stops at the timing when the lift up upper sensor is
unblocked.
• The number of originals decrease as each document is fed. The lift operation is performed again once the lift up upper sensor is blocked
to maintain an optimal paper feed position.
(3) Down operation
• Once all originals have been fed and the empty sensor detects the empty state, the lift-up motor operates in reverse.
• The lift-up lever moves via lift-up motor drive to lower the document feed tray.
• The operation to lower the document feed tray stops when the lift up lower sensor is blocked.
• The document feed tray is lowered in an original empty state when a job completes or originals have been pulled out.
• The document feed tray is lowered due to paper jam, paper misloading, or a state that the DF is raised.
PA THEORY OF OPERATION DUAL SCAN DOCUMENT FEEDER/SP-501/UK-501
[8]
[2]
[3]
(bizhub C658/C558/C458) > 3. PAPER FEED SECTION
[2] Actuator 1
[4] Actuator 2
[1]
[2] Lift-up lever
[4] Lower limit detection actuator
[6] Lift up upper sensor (PS2)
[8] Pick-up roller
PA-5