Polygon Motor Control; Related “Settings/Registration” Mode - Canon imageRUNNER ADVANCE 8105 Series Service Manual

2
Technology > Laser Exposure System > Controls > Polygon Motor Control
When magnification is corrected, changing the Polygon Motor speed between sheets might
be slower depending on the speed, so productivity might be reduced.
Variable Reproduction = Polygon Speed Reshuffling
Communi
Variable Speed
Paper
-cation
Time
Paper Interval Time
Variable speed
105ppm
Wide
-0.3%
-0.6%
-1.0%
* In the actual use, it is assumed that changing speed over 0.6% is rarely seen.
Related "Settings/Registration" mode
Settings/Registration > Preferences > Paper Settings > Paper Type Management Settings
>Details/Edit > Adjust Image position > Fine Adjust Zoom
2 Technology > Laser Exposure System > Controls > Polygon Motor Control
Speed convergence
Paper
Time
PPM
95ppm 85ppm
79% 80% 82%
71% 74% 75%
69% 71% 73%
T-2-23 T-2-23
F-2-58 F-2-58
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Polygon Motor Control

This control is performed to rotate the polygon mirror at a specified speed.
<Execution timing>
When the Polygon Motor is started
<Control description>
1) The DC Controller PCB outputs acceleration signal (ACC) to forcibly rotate the Polygon
Motor.
2) The speed detection signals (FG, BD) are detected to be compared with the reference
signal generated in the reference signal generation area, so that the acceleration signal
F-2-57 F-2-57
(ACC) and the deceleration signal (DEC) are controlled to keep the specified speed.
Polygon motor
Related Error Code
E100: Failure to detect PLOCK signal during BD rotation
E110: Failure to detect VLOCK signal during FG rotation
BD PCB
ACC DEC BD
DC Controller PCB
2-42
F-2-59 F-2-59
2-42