Targeting Tips And Tricks - Omron V460-H User Manual

3 Basic Operation
3-2

Targeting Tips and Tricks

Follow these guidelines for optimal performance.
1
Keep the trigger pulled until you read the barcode. Keep changing the reader's position while
holding the trigger down. If any of the predefined modes of operation or a custom database
configuration is used, the V460-H will run through its sequences while the trigger is activated.
The V460-H continues to cycle and adapt its lighting and imaging parameters with every image
acquired while the trigger is held down. The V460-H acquires several images with each illumination
option, evaluating the optimal settings. If reading the same part or same part type, the V460-H
always uses the most recent good read settings as a starting point so that subsequent reads will
be faster.
2
For labels and flat DPM parts, start at approximately 4" (+/- 100 mm) to 6" (+/- 150 mm) and with
some tilt (+/- 15 degrees). If the symbols are small, move the reader closer, keeping the trigger
pulled until you achieve a successful decode.
3
For shiny, cylindrical, or curved parts, force the close-up mode by moving the part very close –
from contact to approximately 0.25" (+/- 6 mm). If the part radius is small and the code covers
much of the circumference, make sure that it is in the "sweet spot" of the reader's Dome Light-
ing (available for Auto Lighting and Close-Up Lighting modes by default). You can also rotate
the part while holding the trigger down to accomplish this.
4
The ToF (Time-of-Flight) sensor may not estimate the part distance correctly if the part is
small and does not cover the sensor. In such a case, you can flip the part, put your hand briefly
in front of the sensor, or place the part on a table or other work surface.
3-2-1 Code Density (X-Dimension)
The X-dimension is the basic building block of 1D and 2D codes, and determines their physical size
(density). It is usually expressed in mils (thousandth of an inch, i.e., 0.001") or in mm (millimeters),
For a 1D barcode, this is the width of the narrowest bar of the code. For a 2D code, this is the
height or width of a single square.
3-2-2 Quiet Zone
For a 1D barcode, the quiet zone is a clear space of approximately 10x the X-dimension on the left
and right sides of the barcode. For a 2D code, the quiet zone is a clear region free of markings or
text surrounding the 2D code (at least 1x the X-dimension).
3-6
V460-H Industrial Handheld DPM Reader User Manual