Canon imageRUNNER ADVANCE C5500 Series Service Manual page 159

■ Registration Control
Purpose: To correct paper skew / align the leading edges of image and paper
After performing skew correction control, the leading edge of paper is aligned with the leading edge of image for feed control.
● Skew Correction Control
The paper leading edge runs into the stopped Registration Roller, thereby forming a slack (arch) in order to correct the skew.
● Non-stop Registration Control / Stop Registration Control
Depending on the paper feed condition, the following 2 controls are used as feed controls to align the leading edge of paper with
the leading edge of image:
Non-stop Registration Control
The control to align the leading edge of paper with the leading edge of image by accelerating and decelerating the feed speed.
Because paper is not stopped temporarily at the registration position, paper interval between sheets can be shortened to improve
productivity.
Stop Registration Control
This control is executed to stop paper using the Registration Roller, and resume feeding in accordance with the timing when the
image reaches the secondary transfer processing.
■ Fixing Arch Control
This control is used to monitor the slack (arch) status of paper, and depending on that status, switch the feed speed using the
Fixing Motor in order to feed paper to the Fixing Unit always at an optimal status.
This is performed between the Secondary Transfer Unit and the Fixing Unit. When thermal expansion occurs on the Pressure
Roller of the Fixing Unit, the circumference of the roller will increase. Consequently, even if the number of rotations is fixed, the
M19
M44
Paper
PS33
Pre-registration
Roller
M19
M44
145
Registration
Roller
Slack
2. Technology