Zebra KR403 Especificações descarregar pdf (Página 143)

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Bar Codes

Bar Code Readability

10/29/2010 Software Integrator Guide P1026208-001 Rev. B

Spots or voids present in the image

Spots and voids often correspond to dirt, abrasion or burned out elements on the

printhead. Burned out elements prevent heat from transferring, resulting in dead spots on

the label. Dirt or abrasives could also block or redirect the heat or ribbon transfer, resulting

in voids or spots that could make the bar code unreadable. Regular cleaning will prevent

dirt and abrasion problems, but burned out elements require replacement of the printhead.

Unable to sustain wide/narrow ratio

As referenced previously, underburn and overburn can lead to an unacceptable ratio

between wide and narrow elements within a bar code symbol. A general tip to ensure

good bar code print quality is to create symbols with the highest wide-to-narrow ratio that

the specification allows. As symbols become smaller, reading tolerances become more

acute. Wide/narrow ratios can be made more consistent and improved by increasing the

print resolution.

Figure 9-2 • Wide / Narrow Ratio

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Zebra KR403 Especificações Página 143