Canon imagePRESS C1 Service Manual - page 501
Chapter 8
8-36
1) After detection of the home position, the side registration sensor (PS25) shifts to the 13x19 paper detection position.
F-8-43
[1] Sensor plate
[A] Center of the feeding assembly
[B] Home position detection position (position 65 mm rear from the center of the feeding assembly)
[C] 13x19 paper detection position (position 165 mm from the center of the feeding assembly)
2) The machine uses the side registration sensor to detect paper.
2-1) In case a paper is detected in step 1, the machine separates the side registration sensor from the paper [1]. After separating another 2 mm, the machine put the
side registration sensor closer to the paper to recognize the position the paper was detected as the edge of the paper.
F-8-44
2-2) In case no paper is detected in step 1, the machine separates the side registration sensor from the paper [1] by another 2 mm, then the machine put the side
registration sensor closer to the paper to recognize the position the paper was detected as the edge of the paper.
F-8-45
3) The machine calculates the length of displacement from the pulse number of the motor required for the side registration sensor to shift in step 2-1) or 2-2) and
then determine the image writing position (the length of sensor shift is 0.157 mm/pulse)
[A]
[B]
[1]
[C]
2mm
[1]
[1]
A
A+2mm