COPYRIGHT © 2002 CANON INC. CANON CLC1100/1130/1150/1160/1180 REV.1 JAN. 2000 PRINTED IN JAPAN (IMPRIME AU JAPON)
6-35
CHAPTER 6 IMAGE FORMATION SYSTEM
D. Controlling the Concentration of Black Toner
1. Outline
The concentration of black toner is measured, the density of the sample image on the
photosensitive drum is measured, and the change in toner concentration is computed to determine
the amount of black toner to supply (in terms of a length of time). The amount of toner supplied by
the hopper is controlled to suit the change in toner concentration detected this way.
To enable measurement of the concentration of color toner (for updating toner target
concentration), further, a sample color image is formed on the photosensitive drum and measured.
(See p. 6-34.)
Item
Description
Measuring the concentration
Light is directed to a sample image, and the reflected
light is measured (photo detection).
Controlling the initial concentration
The concentration of a sample image is measured
(reference concentration)
at time of installation or replacement of developer.
Measuring the concentration of toner
The concentration of the sample image during
copying operation is measured.
Controlling the supply of toner
Compares the initial concentration and the
concentration during copying operation to determine
the amount of toner to supply.
Controlling LED deterioration
Light coming directly from the LED is measured by
the photodiode used to generate the reference signal,
detecting the degree of deterioration in the intensity
of the LED (at all times).
Compensating for dirt on the window
The initial intensity of the light reflected by the
drum and the intensity of the light reflected during
copying operation are compared to determine the
correction value used to compensate for dirt on the
window.
Table 6-404
2. Controlling the Supply of Black Toner
The density of a black image developed on the photosensitive drum is measured, the change in
concentration is computed, and the result is used to correct the amount of black toner to supply.
Содержание imageCLASS 1100
Страница 8: ......
Страница 24: ......
Страница 26: ......
Страница 33: ......
Страница 55: ......
Страница 101: ......
Страница 103: ......
Страница 121: ......
Страница 141: ......
Страница 143: ......
Страница 159: ......
Страница 239: ......
Страница 247: ......
Страница 255: ......
Страница 261: ......
Страница 263: ......
Страница 369: ......
Страница 397: ......
Страница 399: ......
Страница 451: ......
Страница 453: ......
Страница 493: ......
Страница 495: ......
Страница 549: ......
Страница 556: ......
Страница 563: ......
Страница 586: ......
Страница 670: ......
Страница 674: ......
Страница 683: ......
Страница 698: ......
Страница 704: ......
Страница 711: ......
Страница 785: ......
Страница 799: ......
Страница 829: ......
Страница 945: ......
Страница 957: ......
Страница 959: ......
Страница 963: ......
Страница 965: ...0102ABX XX X PRINTED IN JAPAN IMPRIME AU JAPON This publication is printed on 100 recycled paper ...