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
Содержание Color imageRUNNER C4580
Страница 22: ...Chapter 1 INTRODUCTION ...
Страница 64: ...Chapter 2 INSTALLATION ...
Страница 110: ...Chapter 3 BASIC OPERATION ...
Страница 119: ...Chapter 4 BASIC OPERATIONS AS A PRINTER ...
Страница 129: ...Chapter 5 MAIN CONTROLLER ...
Страница 132: ...Chapter 5 5 2 F 5 1 A Reader Unit B DC controller Circuit Board C Printer Unit A B C HDD 1 2 3 3 4 5 6 7 8 9 ...
Страница 138: ...Chapter 5 5 8 F 5 8 CPU HDD ROM access to the program at time of execution ...
Страница 165: ...Chapter 6 ORIGINAL EXPOSURE SYSTEM ...
Страница 209: ...Chapter 7 IMAGE PROCESSING SYSTEM ...
Страница 210: ...Contents Contents 7 1 Digital Image Processing 7 1 7 1 1 Overview 7 1 7 1 2 Shading Correction 7 1 ...
Страница 212: ...Chapter LASER EXPOSURE 8 ...
Страница 239: ...Chapter 9 IMAGE FORMATION ...
Страница 324: ...Chapter 10 PICKUP FEEDING SYSTEM ...
Страница 355: ...Chapter 10 10 28 F 10 30 F 10 31 9 1 2 3 4 5 1 2 3 4 5 10 thereafter repeats 7 through 10 11 1 2 3 4 5 12 1 2 3 4 5 ...
Страница 358: ...Chapter 10 10 31 F 10 36 F 10 37 5 1 2 6 1 2 in wait for re pickup point of reversal 9 1 2 3 10 1 2 3 ...
Страница 435: ...Chapter 11 FIXING SYSTEM ...
Страница 460: ...Chapter 11 11 23 F 11 13 SEN3 SEN2 SEN1 SEN2 SEN3 SEN1 SEN2 SEN3 SEN1 ...
Страница 491: ...Chapter 12 EXTERNALS CONTROLS ...
Страница 498: ...Chapter 12 12 5 F 12 2 FM1 FM7 FM9 FM2 FM13 FM14 FM12 FM11 FM10 FM5 FM3 FM4 FM8 FM6 ...
Страница 512: ...Chapter 12 12 19 2 Remove the check mark from SNMP Status Enabled F 12 10 ...
Страница 553: ...Chapter 13 MEAP ...
Страница 557: ...Chapter 14 RDS ...
Страница 569: ...Chapter 15 MAINTENANCE INSPECTION ...
Страница 578: ...Chapter 16 STANDARDS ADJUSTMENTS ...
Страница 597: ...Chapter 17 CORRECTING FAULTY IMAGES ...
Страница 612: ...Chapter 17 17 14 F 17 7 PLG1 ELCB1 SP1 H4 H3 H2 H1 H1 H2 LA1 ...
Страница 617: ...Chapter 18 SELF DIAGNOSIS ...
Страница 644: ...Chapter 19 SERVICE MODE ...
Страница 778: ...Chapter 20 UPGRADING ...
Страница 823: ...Chapter 21 SERVICE TOOLS ...
Страница 824: ...Contents Contents 21 1 Service Tools 21 1 21 1 1 Special Tools 21 1 21 1 2 Solvents and Oils 21 2 ...
Страница 828: ...APPENDIX ...
Страница 851: ......