Scan Operation; Rotation Of Polygon Motor - Konica Minolta pagepro 5650EN Service Manual

Theory of operation Ver. 1.0 Nov. 2007
7.2.5

Scan operation

• When the laser beam is scanned across the drum surface from one end to the other
while turning ON and OFF the beam, one line of latent image is created. If the scanning
by the laser beam is repeated while rotating the drum, a two-dimensional image is cre-
ated. The resolution in the scanning direction (from right to left) is determined by the
rotational speed of the Polygon motor and by the speed at which the laser is adjusted.
The resolution in the process direction (from top to bottom) is determined by the rota-
tional speed of the Polygon motor. (If the scanning speed is increased, the next row to be
scanned can be started earlier accordingly.)
7.2.6

Rotation of Polygon motor

• The control (ON/OFF) of the rotation of the Polygon motor is performed as shown below
according to the mode of operation.
Mode of operation ON/OFF of rotation of Polygon motor
Standby state Kept OFF.
Turned on by receiving signal from the Controller, and turned off after 10 s since
Printing state
end of printing.
Power-saving state Kept OFF.
• The following table gives the resolution that differs according to the specifications of the
machine, and the corresponding rotational speeds of the polygon motor.
Type
pagepro 5650EN
pagepro 4650EN
Process Speed
269 mm/s
204 mm/s
7. Write section (PH section)
Resolution
600 dpi
1200 dpi
600 dpi
1200 dpi
A0DXT2E504AA
RPM of polygon motor
31,772 rpm
31,772 rpm
24,094.49 rpm
24,094.49 rpm
15