165
Problems Reading Codes
Section 9-1
Reading
Margin
Others
Check item
Countermeasure
Check that the code being
read is within the field of
vision.
Use a monitor to confirm that the code is in
the field of vision before reading.
Check that the code is a 2-
dimensional code consisting
of cells exceeding the
required resolution.
Use a code consisting of cells exceeding the
required resolution.
Check that the code is
marked properly.
Although an error correction function is sup-
ported, a code cannot be read if it exceeds
the error correction ratio. If the code is not
marked clearly enough, use clearer codes.
Check that the code is being
picked up clearly.
Some workpieces are subject to the effects
of hairlines, such as PWBs. If this occurs,
change the angle of the workpiece or the
angle of the scanner to reduce the effects of
hairlines.
V530-H301
With coaxial illumination, the code may not
be picked up at certain angles of the Scan-
ner. Make sure the Scanner is perpendicular
to the workpiece when reading.
V530-H302
Regular reflection of the illumination may
affect reading. Use a monitor to make sure
there is no regular reflection when reading.
Check item
Countermeasure
Check that there is a margin
(white region) of 4 cells or
more around the code.
Ensure there is a margin around the code.
Check item
Countermeasure
Check error codes.
Turn ON the error code output and take
countermeasures according to the error
codes.
