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Problem With Printing Pdf With Barcodes

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4 comentarios

  • Avatar
    Michael Toupin (mtoupin

    BarTender interacts with the printer driver to determine the DPI of the printer, then generate the barcode using the appropriate x-dimension to match the printer's physical capabilities.  The ZP450 is a 203 dpi printer, so when printing using the Zebra driver, it generates the data for a 203 dpi printer.  Your HP/Canon printer will be somewhere between 1200 dpi and 4800dpi, so when the print information for that is generated it's at a much higher DPI, then when you try to print it to the Zebra printer it has to re-render it at that lower dpi.  Also, Zebra printers are not vector-based printers, so whatever you print to it has to be rasterized first, and since the PDF program isn't rendering the barcodes but just sending them as an image to the printer, the printer driver is going to make a best guess on the output during the rasterization process, which may not make it exact.

     

    So the first thing I'd try would be seeing if the PDF program that you're generating the PDF with can be adjusted to output the printout at 203dpi.  That way when the data is rasterized it's already at the appropriate size.  Other than that, see if there's an option in the PDF printing application to adjust the output DPI.  

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    Legacy Poster

    Thanks, Mike!

     

    I believe you are right. I changed DPI to 203 when converting PS (1200 DPI) to PDF and the bar widths look less twisted. I can't set the PS printer to use 203 DPI because no PS printers supports it. (All PDF printers including Adobe's generate PS first and then convert PS to PDF).

     

    Anyway, I'll generate ZPL from Bartender and let users send ZPL directly to thermal printers. Now I understand why UPS and FedEx return EPL/ZPL when using their online API to generate labels.

     

    Thanks again!

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  • Avatar
    Legacy Poster

    Hi yzhao13,

    I'm also trying to print to Pdf but couldn't get it to work because of the page-size of the generated Pdf is always A4.
    The Label (.btw file) size is 101.6 x 30 mm, but the generated Pdf is A4.
    I use Bullzip PDF Printer.

    Looks to me that you managed to generate/print Pdf file with no problem. I would like to know how you go about generating the Pdf.
    As far as I know, BarTender generates a PostScript that gets converted to Pdf by the PDF Printer.
    But I'm still not clear if I were to manually generate a Postscript from BarTender, how do I achieve that?

    If I'm not mistaken from what you wrote (... I changed DPI to 203 when converting PS (1200 DPI) to PDF...) it seems like you manage to convert PS to PDF.
    Would you mind shedding some light on how to do it?

    Thanks in advance for your answer.



     

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    Legacy Poster

    Was this last question ever answered? Maybe in a different thread? I also have a similar situation, so my question is basically: how do I capture the PS

    output from BarTender? Or actually any VECTOR based output format?

     

    If I use the File->Export Image menu option even the "metafile" formats all seem to encapsulate the raster data instead of the actual vector data, and

    the other formats that I would expect to be in vector format for whatever reason come out corrupt.

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