Canon Vizcam 1000, Руководство по обслуживанию

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COPYRIGHT © 2001 CANON INC. CANON CLC1000/1000S/3100 REV.2 MAY 2001 PRINTED IN JAPAN (IMPRIME AU JAPON)
3-117
3. OPERATION AND TIMING
g. Supplying Bk Toner
As shown in Figure 3-547, the sequence of supply operations is based on the detection of the density of
the image and the measurement of the density taken by the SALT sensor.
When the original has been exposed, the video signals are counted, and the toner supply period is
determined based on the cumulative count.
When copying operation ends, the SALT sensor measures the density of toner on the photosensitive
drum is measured. If the resulting measurement is higher than the ideal density (too much toner), a
subtraction will be made from the count of video signals so that the supply period (amount) will be less; if the
measurement is lower than the ideal density (too little toner), on the other hand, opposite correction is made
to supply a larger amount of toner.
Figure 3-547
The toner density is measured by the SALT sensor as follows. When making single copies,
measurements are taken each time copying ends; in continuous copying, measurements are taken when all
copies have been made. However, if the copy count is set to ‘100’ or higher, measurements are taken when
the 100th copy has been made. (See Figure 3-548.)
Figure 3-548
COPY
Start key
ON
LSTR STBY COPY
Start key
ON
Original exposed
Video signal counted
Toner supply period determined
Toner density measured
by SALT sensor Original exposed Toner supplied Toner supplied
Video signal counted
Toner supply period determined
4 copies
210 copies
1st
1st
2nd 3rd
100th 200th 201st 101st 199th
4th
210th
Toner density
measurement