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Vertical lines are grainy?

Discussion in 'Miscellaneous Printers' started by ikarasu, Sep 9, 2016.

  1. ikarasu

    ikarasu Very Active Member

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    Jun 10, 2016
    Port Coquitlam, bc
    Good afternoon, Back again with another noob question!

    Most of the stuff I'm learning as I go, and I can google... and search wonderful sites such as this one, but I think these terms are a bit to broad. It keeps bringing up banding lines... which I don't believe this is.

    On my Seiko H2-74s, whenever theres a vertical line, it acts like it's overspraying or something (I don't think thats the cause since its just vertical though). I've messed with all the settings / tests I could find, and it always looks like garbage. It's not really a problem in big lines, or big prints or anything... but when I try to print a smallish decal, and pretty much every single cut mark... I get this. Horizontal for the most part is ok .

    Theres 1 bad nozzle in black, and it's been replaced. I don't think it's a head issue - I've tested the media advance value... The PH Mech adjust was just done by a tech, so thats right. I'm out of ideas... Knowing me, it's something stupidly easy I'm just overlooking.

    Thanks for reading / any help advice!
     

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  2. Solventinkjet

    Solventinkjet DIY Printer Fixing Guide

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    Aug 2, 2011
    Denver, CO
    Looks like a bad bi-directional alignment to me. I don't have any experience with that printer but that's what it looks like when you don't get the alignments done just right on the printers I work on.
     
  3. ikarasu

    ikarasu Very Active Member

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    Jun 10, 2016
    Port Coquitlam, bc
    That was the first thing I tried. Granted I was working here for a week, and never touched a production printer before that when I did it , so i may have done it wrong.

    Once this run is done, I'll play around with the indirection settings / alignment once more, see if that fixes it /.. or makes it worst/better.

    Thanks
     
  4. ikarasu

    ikarasu Very Active Member

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    Jun 10, 2016
    Port Coquitlam, bc
    I had some time to play with it. I tried an automatic adjustment (prints a sample, then you enter values, and it'll put the settings into each quality). Also tried a manual adjustment... same thing. going to try printing uni-directional.. if it was a bidirectional issue, thatd fix it, wouldnt it?

    Thanks for the help! The bi's were a little off, so I'm sure it needed to be done anyways :D
     
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