Paper Feeding During Printing - Canon BJ-W3000 Service Manual

b. Roll media
1) When the paper is set and the media
trailing edge sensor detects the paper, the
suction fan operates to suck the paper on
to the platen. This prevents the paper from
lifting away from the platen during print-
ing.
2) By pressing the upper or down arrow
key, the carriage is advanced about
200mm to adjust the light of the media
sensor (PS9). At the same time, the paper
feed motor (M1) is rotated, feeding the
paper forward about 30mm. Whether the
paper is cut sheet or roll media is detected
by the media trailing edge sensor.
3) The carriage is returned to the home
position and the paper width is detected.
4) After the carriage is advanced to a posi-
tion about 200mm to the left of the home
position, paper is fed backward and the
media sensor (PS9) detects the skew of
the paper.
Thereafter paper is fed backward.
When the paper front edge passes
through the media sensor (PS9), the paper
feeding stops after switch-back operation.
CHAPTER 2. BASIC OPERATION
REFERENCE
• Paper length detection is not con-
ducted for roll media.
• After loading the paper, it can be fed
back and forth by pressing the up and
down arrow keys.
• After completion of printing on roll
media, the carriage is moved to detect
the top edge of the paper, to make sure
the cutting operation was successful.

3. Paper feeding during printing

Paper is fed during printing, alternately
with the carriage.
When print data is received, the paper is
fed to the print start position and then the
carriage moves to print 1 band. During the
printing operation, the paper feed motor
(M1) stops.
After printing 1 band, the paper feed
motor rotates and feeds the paper forward for
the next band. While the paper is being fed,
the carriage motor (M2) stops. Then the next
band is printed.
This feeding cycle of stop, rotation and
stop of the paper feed motor (M1) is repeated
unit the final band is printed. When there is
no data to be printed for the next band, the
paper is fed to reach the next position for a
band containing data.
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