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Process/Operation > Laser Exposure System > Various Controls > Horizontal scanning synchronous control
Process/Operation > Laser Exposure System > Various Controls > Horizontal scanning synchronous control
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Horizontal scanning synchronous control
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Purpose
To align the writing start position in horizontal scanning direction.
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Execution timing
Per 1 line
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Control detail
1) DC controller forcibly emits the laser diode of Bk laser driver circuit in non-image area.
2) There is the BD circuit on the scanning light path of the laser beam and laser beam is
emitted to the BD circuit and then, is sent to the DC controller as a parallel synchronous
signal (/BD1).
3) DC controller sends /BD1 signal as a horizontal scanning synchronous signal (/BD0) to the
main controller.
4) When the main controller inputs /BD0 signal, the video signal per 1 line of each color (DATA_
Y, DATA_M, DATA_C, DATA_K) is outputted to the DC controller after the specified time.
According to this, each laser driver emits the laser beam from the specified position per 1
line.
NOTE:
• Since /BD signal is the horizontal scanning synchronous signal of Bk line, Bk color is used
as a standard of horizontal scanning for each color.
• Horizontal scanning direction of this machine of left standard (left to right) for Y color and
M color, and right standard (right to left) for C color and Bk color.
<Y,M color>
<C,Bk color>
Right standard
Left standard
Feeding
direction
F-2-49
BD
[1]
[3]
[2]
DA
TA_K,/DA
TA_K
DA
TA_C,/DA
TA_C
DA
TA_M,/DA
TA_M
DA
TA_Y
,/DA
TA_Y
/BOD
Main Controller
DC Controller
Video signal
[1]
C/Bk Laser Driver
[2]
BD Sensor
[3]
Y/M Laser Driver
F-2-50
