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Main Unit Theory of Operation Conveyance Section
2-87
II Composition/Operation
15.3 Operation
15.3.1 Conveyance speed control
• The Intermediate Transport Motor (M3) provides drive for the conveyance section.
• The conveyance speed is variable in three steps and the appropriate one is selected
according to the media type and print mode as detailed below.
• For the first print, the machine makes the above decision before starting a print/media
feed sequence and, based on the established speed, starts the print/media feed
sequence.
15.3.2 Synchronizing Roller control
• When the media taken up and fed in by the Feed Roller reaches the Synchronizing
Roller, a loop is formed in the media and media conveyance is temporarily stopped. Con-
veyance skew is corrected by this loop.
• The Synchronizing Roller Sensor (PC4) detects whether or not the media has reached
the Synchronizing Roller.
• The media fed in is synchronized with the image before media conveyance is restarted.
A. Media detection control
• When the media fed from the Feed Roller pushes up the actuator of the Synchronizing
Roller Sensor (PC4), the sensor is unblocked. With this event occurring, the machine
determines that the media has reached the position before the Synchronizing Roller.
Media type/print mode Conveyance speed Reason
Plain paper 1 (standard)
Thick stock, envelopes, postcards, label OHP film
(monochrome print)
1/2 (one-half speed)
To ensure good fusing
performance
OHP film (color print) 1/3 (one-third speed)
To ensure good light
transmission performance
4138to2099c0
Synchronizing Roller
Paper (fed from Duplex)
Media (from Tray 1/2/3)
Synchronizing Roller Sensor
(PC4)
Actuator
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