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EVOLUTION LX
SYSTEM MANUAL Issue 1.0 5 DEC 2009
The picture at the right is an
exploded view of the
previous scanned image.
Again notice the ink bleed
and how it affects the ratio
of the dark to the light bar
widths. Using the ADD
SPACE parameter gives the
user the ability to minimize
this effect.
Trial and error is necessary
to find the correct settings to
be used. The substrate
material is the governing
factor in deciding what the
correct settings are.
The second concept that the
pictures show is the overall
consistency in bar width
across the image. All
scanners have the capability
of accepting a certain
amount of bar growth but
must be kept to a minimum.
Bar growth will be seen in
non-linear production lines.
Normally with a consistent
running production line,
there is no need for an
external encoder. Where
there is an acceleration or
deceleration component in
the production line, it is
absolutely necessary to use
an encoder. Even with an
encoder a code can deviate
from the proper aspect ratio.
This deviation is caused by
slippage of the product
against the production line.
Bar growth will also lead to a less dense dark bar due to the fact the printed
vertical columns will print further apart then previous dark bars. This may also be
seen when not using an encoder and the line speed of the printer is set slower
than the actual line speed of the production line.