Chapter 8
8-15
8.3.5 Correcting Image Displacement
8.3.5.1 Outline
The following factors can displace images of individual colors:
- displacement of the photosensitive drum caused by replacement of the drum unit/toner container
->displacement in sub scanning direction
- displacement of laser path caused by replacement of laser unit
->displacement/angle in main scanning direction
- displacement in laser path length caused by changes in temperature inside machine
->variation in magnification
To correct the discrepancies in images, the machine executes corrective control for image position; it detects
displacement in color by forming a pattern of a specific color on the transfer belt and reading it against the
correct position.
F-8-13
Detecting displacement in color
Displacement in sub scanning
direction
corrects the write start position in
sub scanning direction.
• Reads the individual pattern (of different colors) using the pattern reader
photo sensors.
• Identifies displacement in color with reference to the pattern signals in the
DC controller.
• Forms an image position correction pattern on the transfer belt (direct transfer).
Displacement in main scanning
direction
corrects the start position in main
scanning direction.
corrects the laser path inside the
laser unit.
Angle in main scanning
direction
Discrepancy in reproduction
ratio in main scanning direction
corrects image data generation timing
in main scanning direction
Summary of Contents for Color imageRUNNER C5180 Series
Page 22: ...Chapter 1 INTRODUCTION...
Page 64: ...Chapter 2 INSTALLATION...
Page 110: ...Chapter 3 BASIC OPERATION...
Page 119: ...Chapter 4 BASIC OPERATIONS AS A PRINTER...
Page 129: ...Chapter 5 MAIN CONTROLLER...
Page 138: ...Chapter 5 5 8 F 5 8 CPU HDD ROM access to the program at time of execution...
Page 165: ...Chapter 6 ORIGINAL EXPOSURE SYSTEM...
Page 209: ...Chapter 7 IMAGE PROCESSING SYSTEM...
Page 212: ...Chapter LASER EXPOSURE 8...
Page 239: ...Chapter 9 IMAGE FORMATION...
Page 324: ...Chapter 10 PICKUP FEEDING SYSTEM...
Page 435: ...Chapter 11 FIXING SYSTEM...
Page 460: ...Chapter 11 11 23 F 11 13 SEN3 SEN2 SEN1 SEN2 SEN3 SEN1 SEN2 SEN3 SEN1...
Page 491: ...Chapter 12 EXTERNALS CONTROLS...
Page 498: ...Chapter 12 12 5 F 12 2 FM1 FM7 FM9 FM2 FM13 FM14 FM12 FM11 FM10 FM5 FM3 FM4 FM8 FM6...
Page 512: ...Chapter 12 12 19 2 Remove the check mark from SNMP Status Enabled F 12 10...
Page 553: ...Chapter 13 MEAP...
Page 557: ...Chapter 14 RDS...
Page 569: ...Chapter 15 MAINTENANCE INSPECTION...
Page 578: ...Chapter 16 STANDARDS ADJUSTMENTS...
Page 597: ...Chapter 17 CORRECTING FAULTY IMAGES...
Page 612: ...Chapter 17 17 14 F 17 7 PLG1 ELCB1 SP1 H4 H3 H2 H1 H1 H2 LA1...
Page 617: ...Chapter 18 SELF DIAGNOSIS...
Page 644: ...Chapter 19 SERVICE MODE...
Page 778: ...Chapter 20 UPGRADING...
Page 823: ...Chapter 21 SERVICE TOOLS...
Page 828: ...APPENDIX...
Page 851: ......