Eastey Value VSA2530TK-V1, User Manual

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24 Operation
Example 1: Consider a package item that has holes or transparent areas where light
from the sensor can shine through like the following illustration.
Considering a conveyor speed of forty centimeters per second (40 cm/sec.) the
following table shows the distance the item will travel in one second, a tenth of a
second, and a hundredth of a second.
Time 1 sec. 0.1 sec. 0.01 sec.
Travel Distance 400 mm 40 mm 4 mm
For the item shown above, to ignore the 20 mm space will require 0.05 sec (half
of the 0.1 sec. 40 mm distance, or five times the 0.01 sec. 4 mm distance).
Note: The above calculation is based on conveyor speed with no
load. Weight of actual items will place a load on the conveyor
that will likely slow the conveyor. Some trial-and-adjustment
will likely be required to obtain the required conveyor speed.
Example 2: Irregular shape package items such as for meats or vegetables, etc.,
result from varying shapes and sizes of items and in some cases random
orientation of the items they contain. These packages present a challenge
because the sensor may have difficulty detecting them.
For these items, observe the required timing for the space before and after
an item. The space between consecutive items must be longer than the
transparent space within any item (see the previous example). Enter
required values for Advance Time, Conveyor Time, and if applicable, the
Skip Time in the fields provided.
Advance Time + Conveyor Stop > Skip Timer.
Set Skip Timer = 0 when the Skip Clarity function is not used.
The timing of space between to items must be longer than the Skip timing or the
sensor will detect items wrong.
20 mm
Sensor Location
This area is opaque. It blocks
light from and to the sensor.
This area is transparent. It allows light
to pass through from and to the sensor.
(In this example,there are five of these
areas.)
0.79 in.