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Process/Operation > Laser Exposure System > Various Controls > Laser ON/OFF control
Process/Operation > Laser Exposure System > Various Controls > Laser ON/OFF control
Various Controls
■
Overview
Item
Operation description
Laser ON / OFF control
Laser light is turned ON / OFF according to the combination of laser
control signal
Horizontal scanning
synchronous control
To align the writing start position in horizontal scanning direction.
Vertical scanning
synchronous control
To align the writing start position in vertical scanning direction.
Image Mask Control
This control prevents the laser beam from being emitted in non-image
area to avoid the secondary transfer outer roller from getting dirt.
Laser Scanner Motor Control To rotate the scanner mirror by the specified speed.
APC control
To make the laser light per 1 line consistent amount
BD correction control
To correct the gap BD timing gap due to the angle variation of
Scanner Mirror.
Dustproof shutter control
To prevent the laser light from being emitted to the machine inside.
Main Controller
PCB 2
Laser Scanner Unit
Scanner Motor
C/Bk
Laser Driver PCB
Y/M
Laser Driver PCB
DC Controller (UN9)
Laser ON/OFF control
Horizontal scanning
synchronous control
Image mask control
Laser scanner motor control
APC Control
Dustproof shutter control
Vertical scanning
synchronous control
T-2-16
F-2-46
■
Laser ON/OFF control
●
Purpose
Laser light is turned ON / OFF according to the combination of laser control signal.
●
Execution timing
After the power ON
●
Control detail
DC Controller switches the 4 modes (forcible OFF mode, APC mode, Print mode and standby
mode) according to the laser control signal.
DC
Controller (UN9)
Laser Driver
PCB
Laser Beam
Scanner Mirror
Video Signal
Laser Control Signal
Mode
Laser status
Remark
Forcible OFF mode
OFF
Light intensity setting decided on APC is cleared.
APC mode
ON
Laser light intensity adjustment
Print mode
ON / OFF
Laser is emitted according to the video signal.
Standby mode
OFF
Host machine is in standby status.
instruction
Image formation
ready timing
At 1st line (APC)
At 2nd line (APC)
At 3rd line (APC)
At 4th line (APC)
Mode
name
Standby
mode
Standby
mode
APC mode
APC mode / Print mode
Forcible
OFF mode
LaserD
LaserC
LaserB
LaserA
PSTBY
PSTBY
PINTR
LSTR
F-2-47
T-2-17
F-2-48