drawing a Barcode without a Barcode font

Mike Kerner MikeKerner at roadrunner.com
Thu Jul 26 22:32:44 CEST 2018


It doesn't surprise me that the optical scanning on the iphone is
performing differently than the ccd or laser scanner on the conveyor are.
The laser/ccd is only going to scan in the 600-650 nm wavelength, which is
both good and bad.  The overall width of the barcode shouldn't matter to
the scanner within the range that you will be dealing with.  It's not
unusual for 1D barcodes to be the full width of an AIAG label.
I just googled "free 2 of 5 font" and found a bunch of entries.  I'm not
using 2 of 5 so I can't speak to how good any of them are.


On Wed, Jul 25, 2018 at 12:26 PM Stephen Barncard via use-livecode <
use-livecode at lists.runrev.com> wrote:

> "Btw, us tractor tape the correct expression?"
>
> I could see how 'conveyor belt' could be easily lost in translation.
>
> sqb
>
> --
> Stephen Barncard - Sebastopol Ca. USA -
> mixstream.org
>
> On Wed, Jul 25, 2018 at 8:20 AM, Matthias Rebbe via use-livecode <
> use-livecode at lists.runrev.com> wrote:
>
> > Yes, with iPhone and our USB scanners we are able to scan that “wider”
> > bars, but i am not sure the highspeed scanners of the carrier can.
> > The packages are scanned by  high speed scanners while they are carried
> > and sorted on a“tractor tapes”. Btw, us tractor tape the correct
> expression?
> >
> > If the thermal transfer labels are accepted by the carrier then i will
> > add an option for the user to switch between laser and thermal printing.
> > The app will use different settings for laser and thermal printing.
> > So in case the TT printer is broken, they can switch over the laser
> > printer.
> >
> >
> >
> > > Am 24.07.2018 um 00:01 schrieb Bob Sneidar via use-livecode <
> > use-livecode at lists.runrev.com>:
> > >
> > > Out of curiosity, does printed barcodes from the laserwriter still work
> > with these settings?
> > >
> > > Bob S
> > >
> > >
> > >> On Jul 22, 2018, at 14:18 , Matthias Rebbe via use-livecode <
> > use-livecode at lists.runrev.com> wrote:
> > >>
> > >> I have to add something.
> > >>
> > >> As I wrote, we were able to successfully scan the labels. This is true
> > as long as we print the labels with a laser printer.
> > >>
> > >> If we print the labels with a thermo printer (203 dpi) then the code
> > cannot be scanned with the values i posted before.
> > >> We  had set the line thickness of the rectangles to 0 and had to
> > increase the width of the black bars and decrease the width of the clear
> > ones.
> > >>
> > >> So the code below shows the settings which allow us to scan the labels
> > with a Toshiba B-EV4D and a Zebra LP 2844.
> > >>
> > >> put “3" into tNarrow
> > >> put “6" into tWide
> > >> set the width of grc "narrowC" to (tNarrow - 2)
> > >> set the width of grc "narrowB" to (tNarrow -3)
> > >> set the width of grc "wideC" to tWide
> > >> set the width of grc "wideB" to tWide
> > >>
> > >> Regards,
> > >>
> > >> Matthias Rebbe
> > >
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