Canon iR C6800 Series, Руководство по обслуживанию

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Chapter 8
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[1] Paper
[2] Horizontal registration sensor (PS24)
[3] Sensor plate
[4] Horizontal registration motor (M28)
a. Horizontal Registration Search
1) After a home position search*1, the horizontal registration sensor (PS24) moves to the 13x19 paper detection
position *2.
*1. Where the horizontal registration sensor detects the sensor plate (i.e., 61.5 mm toward the rear from the
middle of the feeding assembly).
*2. 165 mm toward the rear from the middle of the feeding assembly.
F-8-44
2) The horizontal registration sensor checks the presence/absence of paper.
21) If the presence of paper is identified in step 1., the horizontal registration sensor is moved away from the paper
until it detects the absence of paper; after it has been moved 2 mm from the paper, it is then moved closer to the
paper once again, identifying the point at which paper is detected as the edge of paper.
F-8-45
22) If the absence of paper is identified, the horizontal registration sensor is moved away by 2 mm from the paper
and then back closer to the paper, identifying the point at which paper is detected as the edge of the paper.
F-8-46
3) The machine counts the number of motor pulses generated when the horizontal registration sensor is moved in
step 21 or 22 to find out the displacement of paper, thus determining the image write start position (for each
single pulse, the sensor moves over a length of 0.157 mm).
Center of the paper path
(0mm)
Home position
(61.5mm)
Sensor plate
13X19 paper detection position
(165mm)
2mm
Paper
Paper
A A+2mm