– 2.19 –
Start the detection.
Turn on the paper width sensor.
The sensor moves onto the media to
permit the reading of the sensor
value. → S on
The sensor moves out of the media to
permit the reading of the sensor
value. → S off
Calculation of the edge detection
value
The rightmost edge of the media is
detected from the rightmost edge of
the device. → R edg
The leftmost edge of the media is
detected from the leftmost edge of the
media. → L edg
Calculation of the paper width
Turn off the paper width sensor.
The sensor travels to the Y coordinate
of the origin for plotting.
Head capping
Detection completes.
2-3. Brief explanation of media size detection control
Detection of the front ends of a media → Detection by the paper width sensor
Detection of the right- and left-side edges of a media → Detection by paper width sensor
Brief flow chart of the media width detection processing
Edges of the media are detected through the use of the difference in lightness between the
media and the platen (cutter slit), based on which the paper width is calculated.
........ The sensor moves to the Y coordinate of the paper
sensor to ensure that the sensor reaches a position
on which the media is placed.
........ The sensor moves to the Y coordinate at the
rightmost end of the platen to ensure that the sensor
reaches a position on which the media is not placed.
........ Calculation is made from “S on” and “S off.”
(Standard value: 50%)
........ Calculation is made from “R edg” and “L edg.”
........ After the sensor travels to the Y coordinate, the
device notifies the origin plotting of the current
position.
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