Operation - Konica Minolta magicolor 5550 Service Manual

Theory of operation Ver. 1.0 Nov. 2006

19.3 Operation

19.3.1 Conveyance speed control
• The intermediate transport motor provides drive for the conveyance section.
• The conveyance speed is variable in four steps and the appropriate one is selected
according to the media type and print mode as detailed below.
Media type/print mode
Plain paper (monochrome print)
Plain paper (color print)
Thick stock, envelopes, postcards, label, OHP
transparencies, glossy paper, plain paper in the
glossy paper mode, thick stock 1 in the glossy
paper mode, long size paper
Thick stock 2 in the glossy paper mode
• For the first print, the main body makes the above decision before starting a print/media
feed sequence and, based on the established speed, starts the print/media feed
sequence.
19.3.2 Registration roller control
• When the media taken up and fed in by the feed roller reaches the registration roller, a
loop is formed in the media and media conveyance is temporarily stopped. Conveyance
skew is corrected by this loop.
• The registration sensor detects whether or not the media has reached the registration
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 registration sen-
sor, the sensor is unblocked. With this event occurring, the main body determines that
the media has reached the position before the registration roller.
Registration sensor (PS4)
Actuator
4138to2099c0
19. Conveyance section (Registration roller)
Conveyance speed
magicolor magicolor
5550 5570
185 mm/s 216 mm/s
152mm/s 185 mm/s
To ensure good fusing
76 mm/s
performance
To ensure good glossy
61.7 mm/s
performance
Registration roller
Media (fed from duplex)
Media (from tray 1/2/3)
Reason
75