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Is this Overspray? Need advice on how to fix, please. HP Scitex FB750 video and photos

Discussion in 'Hewlett Packard' started by PhilSwatch, Jan 9, 2019.

  1. PhilSwatch

    PhilSwatch New Member

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    Dec 12, 2018
    Baltimore
    Hello all! First time poster here. Any advice or tips would be much appreciated.

    Our HP Scitex FB750 flatbed printer is having a print quality problem. I've link a video and a few photos below. As you can see, the edges of our white ink banding is fuzzy. The photo links show close-ups of this. In the video, as the head unit makes the first pass going from left to right and lays down the first layer of ink, the left side of the edge is somewhat sharp and the right side of the edge is fuzzy. As it goes back from right to left for the second pass, the fuzziness occurs on that left edge of the banding. Is this Overspray? If not, what could it be? I've also linked a close up of a portion of the Diagnostic Print. See below the photos for our print details.

    Video- https://imgur.com/a/HyLWCaR
    Photo- https://imgur.com/a/0LA2WE4
    Photo- https://imgur.com/a/WI8PhCk
    Diagnostic Print- https://imgur.com/a/9MP2CQJ

    Printing on Lintec clear material
    Head height is .085"
    Quality is Indoor Signage Plus
    Resolution 600 x 600

    We have purged all inks and cleaned the print heads multiple times.
    We have Filled the Printheads with ink.
    We have manually calibrated the Media Feed Calibration, Bidi Registration, and Printhead X Calibration.
    Our Jet Map is on par with how we've printed in the past, so not much difference there.
    We've increase Lamp Power, and are using the Ionizer Bar to reduce static electricity.
    We have Emptied the Ink Vacuum since we got a notice for that while troubleshooting.

    Help please? And thanks for reading :)
     
    Tags:
  2. petepaz

    petepaz Major Contributor

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    Feb 14, 2007
    NJ/NY/PA
    we have an roland LEJ uv printer and noticed that on occasion for us it was a static issue or a print head issue. if it's not a head issue you might need a better static solution.
    we started using a static spray on sheets before we print. i use it on acrylic, sintra, coroplast and aluminum really seems to help.
    sprayway- SW-955 anti-stat static eliminator
     
    • Like Like x 1
  3. PhilSwatch

    PhilSwatch New Member

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    Dec 12, 2018
    Baltimore
    Thanks Pete! We've cleaned the Ionizer Bar and wiped down the material with alcohol first, and then with an anti-static spray. Didn't make much of a difference. However, the fuzziness seems to be very uniform. As in, there is a pattern that repeats up and down both sides of the fuzzy edge. If it is a print head problem, any additional steps you could suggest?
     
  4. petepaz

    petepaz Major Contributor

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    Feb 14, 2007
    NJ/NY/PA
    white has always been a tricky issue. usually the spray helped in our case. might want to check with your tech at this point. sounds like you have done pretty much all you can do on your end.
     
  5. 2CT Media

    2CT Media Very Active Member

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    Jun 15, 2009
    Mesa, Arizona
    Have you tried fine text mode?
     
  6. czbhu

    czbhu New Member

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    Mar 21, 2014
    Hungary
    Have you found the problem? We had bad ink and it looked like this.

     
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