Intermec ColorCoder V4 Service Manual page 63

2.4 Pick Up/Feeder System, cont'd.
2.4:C Pick Up Operation, cont'd.
[Roll paper slackened]
Roll sensor lever
Roll sensor
[Roll paper not slackened]
Figure 2-46
Intermec ColorCoder V4 – Service Manual Ed. 1
Summary of operation
Paper feeding procedure
Since the fan fold paper is picked up and fed with the feed unit, its
feeding procedure is not referred to here.
The paper pick-up operation indicates the procedure that the roll
paper is rotated by the rotations of the roll drive shaft holding the roll
paper so that required quantity of paper for the feeding and printing
is sent.
When the printing operation is started, the roll unit starts to feed the
paper.
If the paper is slackened, light for the roll sensor is blocked with the
roll sensor lever and the roll drive shaft stops rotating.
Roll paper
When printing is started and paper is fed, the slackness is eliminated
and the paper pushes the roll sensor lever. Then the roll sensor is
unblocked and the roll sensor ON signal is sent to the roll holder
PCB. The roll holder PCB detects the roll sensor ON signal, issues
a roll motor drive signal, rotates the roll drive shaft and sends the
paper.
When the paper is sent, the roll sensor lever is released and blocks
the light to the roll sensor.
When the roll holder PCB detects the roll sensor OFF, the roll motor
drive signal is stopped and the roll drive shaft stops rotating.
Above procedure is repeated so that the roll unit feeds required
quantity of paper.
Chapter 2 Operation and Timing
Roll paper Roll drive shaft
Figure 2-45
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