On Fri, 9 Jan 2004, pesoy misak wrote:
> Dear all
>
> I have a problem with printing in JAVA. I have a font
> (Code 39) that could convert all the numbers into
> barcode (thanks to felix sheldon for the guidance) the
> problem is the barcode scanner doesn't want to read
> the barcode that I have printed using my bubble jet
> printer. Is there a problem when reading a barcode
> printed using inkjet printer or may be the paper. Is
> there any suggestion?
What sort of barcode scanner type are you using?
1) a contact wand you drag over the barcode
2) a CCD you hold very close to or on the barcode
3) a linear laser
4) a multi-angle laser
5) a digital camera
Just use the isolation principle to help diagnose where the fault is.
Try other barcodes
Try other scanners with your barcodes
If the problem is with your barcodes try looking at them and decoding on
paper whilst refering to the Code39 chart... an excercise for the reader
is to find the chart. Then look at what's missing.
Problems can be with contrast and alignment. These tend to be less of a
problem with bigger 'characters' IE try printing 50mm high, 150mm wide vs
5mm high, 50mm wide. Oh yeah.. if the ink's fading, try running through a
photocopier with high contrast as a last ditch effort (maybe enlarge too).
At the office we've got thermal transfer and also laser printers printing
code39 barcodes. All our scanners are keyboard wedge devices which makes
things easy.
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