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Major Color Dropout/Banding Vutek GS3250

Discussion in 'Digital Printing' started by RandomPrintGuy, Sep 26, 2019.

  1. RandomPrintGuy

    RandomPrintGuy New Member

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    Mar 20, 2019
    Little Rock, Arkansas
    Hello all,

    I am trying to figure out why our Vutek GS3250LX (LED) is having sudden, random banding. I looks as if entire heads are dropping out. The weirdest part is that the next print was perfectly fine. (no purge in between; it was set to automatically start the next print when it finished the first.) Is the head going bad? Is it an electrical/board issue? Any advice or help is appreciated.

    Thanks.
    20190926_122729.jpg 20190926_122718.jpg
     
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  2. Roger the Mash

    Roger the Mash New Member

    Vaccum /air leak on the pipework or tank
     
    • Agree Agree x 1
  3. RandomPrintGuy

    RandomPrintGuy New Member

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    Mar 20, 2019
    Little Rock, Arkansas
    Thanks for the input, do you have an idea on the best way to find it? Just listen for it and track it down?
     
  4. Roger the Mash

    Roger the Mash New Member

    You won’t hear them just go round checking tightness on all banjo connections on clear pipes also on ink pipes and also O-rings on connections to the heads on the offending colours
     
    • Like Like x 1
  5. Roger the Mash

    Roger the Mash New Member

    Ps is your ink temp at the secondary tanks ok upload_2019-9-28_15-34-44.jpeg
     
  6. RandomPrintGuy

    RandomPrintGuy New Member

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    Mar 20, 2019
    Little Rock, Arkansas
    what is the optimal operating temp range? I checked almost everything for leaks and I couldn't find anything, but we have had some unusually hot days here. Our air conditioning doesn't always do its job, so maybe the ink is temp is too high?
     
  7. tbaker

    tbaker Member

    It looks like you’re losing either one or both magenta jets. The easiest way to check the stability of the jets is to print a flood of red (2x3) or so, and immediately on the back print a jet test. If both of your magenta jets are gone, check your primary ink filter. If it’s been longer than a year, you’re due. If it’s one jet, check to make sure the damper isn’t leaking.
     
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