Canon Unit-L1 Service Manual page 25

2. Technical Explanation
3. Fold operation
When the post-fold sensor (PS6) detects the leading edge of paper, the fold motor (M2) stops. Then, the fold motor (M2)
rotates backward to push the paper back toward the inlet until it stops at the folding position. The pushing plate motor (M3)
rotates backward to retract the pushing plate. The registration motor (M1) continues to rotate forward.
M1 M1
Pushing Plate
PS6 PS6
Folding Position
M2 M2
M3
The registration motor (M1) rotates forward to make the paper form a loop. After a specified time, the pushing plate motor
(M3) rotates forward to make the pushing plate poke the folding area of the paper into the guide.
M1
M3
After the paper is pushed in, the pushing plate motor (M3) rotates forward to retract the pushing plate. The registration motor
(M1) continues to rotate forward. The fold motor (M2) rotates forward to turn the folding roller.
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