Paper feeder lift operation
The lift operation keeps the stack surface of paper at a specified height to maintain stable media
feeding. The paper-feeder driver controls the paper-feeder lifter motor (M2) and monitors the paper-
feeder media stack surface sensors (SR1, SR2) to adjust the stack height when the printer is turned on,
when the printer recovers from sleep mode, when the paper-feeder is installed or as needed during a
print operation. The paper feeder has two paper-feeder media-stack surface sensors. The paper-feeder
media stack surface sensor 1 detects the stack height during a print operation. The paper-feeder media-
stack surface sensor 2 detects the stack height when the printer is turned on, when the printer recovers
from sleep mode and when the paper-feeder is installed. The operational sequence of the lift operation
is as follows:
1. The paper-feeder driver rotates the paper-feeder lifter motor to lift the lifting plate.
2. The paper-feeder driver stops the paper-feeder lifter motor when the paper-feeder media-stack
surface sensor 2 detects the stack surface.
3. The paper-feeder driver rotates the lifter motor again when paper-feeder media stack surface 1
detects that the media surface is lowered during a print operation.
Figure 1-48 Paper-feeder lift
The paper-feeder driver notifies the formatter if either of the paper-feeder media-stack surface sensors
fails to detect the stack surface within a specified period from when a lift-up operation starts.
ENWW
Optional paper feeder
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