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7.3.1. Charging
The charging roller, comes in contact with the OPC drum surface and charged to approximately -1100 volts, and ensures a uniform
negative potential of approximately -600 volts on the OPC drum surface by the charging roller, depending on the selected dot per
inch printing and ambient temperature.
negative potential of approximately -600 volts on the OPC drum surface by the charging roller, depending on the selected dot per
inch printing and ambient temperature.
7.3.2. Laser Exposure and Scanning
7.3.2.1. Laser Exposure
As the OPC drum rotates, the uniformly charged OPC drum is exposed by the modulated laser beam. The vertically-moving OPC
drum passes in front of horizontally scanning laser beam, and the negative charge on the OPC drum surface are neutralized by the
laser beam. This forms a latent image.
drum passes in front of horizontally scanning laser beam, and the negative charge on the OPC drum surface are neutralized by the
laser beam. This forms a latent image.
Laser output power is either approximately 0.25 mW or 0.4 mW on the OPC drum surface, depending on whether the printer is
printing in 1200 dots per inch (dpi) mode or 600 dpi mode. The laser exposure, the negative potential on the OPC drum varies from
approximately -600 volts (unexposed) to -50 volts (fully exposed).
printing in 1200 dots per inch (dpi) mode or 600 dpi mode. The laser exposure, the negative potential on the OPC drum varies from
approximately -600 volts (unexposed) to -50 volts (fully exposed).
7.3.2.2. Laser Scanning
A laser diode generates the laser beam, and lenses and mirror in the laser scanner direct the beam to the OPC drum. The beam
is mode parallel by the collimator lens and is directed at the rotating polygonal mirror, attached with the polygon motor. The beam
is made parallel by the collimator lens and is directed at the rotating polygon mirror. The polygon mirror rotates at a constant
revolutions approximately 18,000 per minute. This transforms the beam into a horizontally scanning beam, which is directed
through the primary lens, altering the beam’s angular rotation motion into a constant horizontal motion. The toric correction lens
corrects the beam for any vertical misregistration. Next, the beam reflects off of a mirror and passes through a window where it
scans across the rotating OPC drum. At the beginning of each horizontal sweep, the horizontal sync mirror deflects the laser beam
to the horizontal sync sensor. This informs the engine control board that the laser beam is beginning its horizontal sweep and that
it can begin to modulate the signal with the data to be printed on that line of the image.
is mode parallel by the collimator lens and is directed at the rotating polygonal mirror, attached with the polygon motor. The beam
is made parallel by the collimator lens and is directed at the rotating polygon mirror. The polygon mirror rotates at a constant
revolutions approximately 18,000 per minute. This transforms the beam into a horizontally scanning beam, which is directed
through the primary lens, altering the beam’s angular rotation motion into a constant horizontal motion. The toric correction lens
corrects the beam for any vertical misregistration. Next, the beam reflects off of a mirror and passes through a window where it
scans across the rotating OPC drum. At the beginning of each horizontal sweep, the horizontal sync mirror deflects the laser beam
to the horizontal sync sensor. This informs the engine control board that the laser beam is beginning its horizontal sweep and that
it can begin to modulate the signal with the data to be printed on that line of the image.
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KX-CL500 / KX-CL510
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