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Need Help Color shifts part way through print

Discussion in 'Digital Printing' started by sleepyeyed, Jan 13, 2021.

  1. sleepyeyed

    sleepyeyed New Member

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    May 11, 2011
    Albany, New York
    Having an issue where my roland xr-640 is printing solid colors inconsistently. You can see in the photo what's happening.[​IMG]

    Any help is appreciated. Thanks.
     
    Tags:
  2. Gino

    Gino Premium Subscriber

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    Jun 7, 2006
    PA
    Looks as if your signal was interrupted.
     
  3. Solventinkjet

    Solventinkjet DIY Printer Fixing Guide

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    Aug 2, 2011
    Denver, CO
    It's probably a bad damper or other ink flow issue. Is there any air in the ink lines?
     
    • Agree Agree x 5
  4. Joseph44708

    Joseph44708 Member

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    Jan 16, 2020
    Florida
    Do a nozzle print when you notice this happening to rule out any ink flow problem then look into Ginos Signal Interruption
     
  5. netsol

    netsol Very Active Member

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    Apr 26, 2016
    englishtown, nj
    if it is some sort of signal interruption, power management is often the culprit.
    device manager, choose your network adapter, properties power management
    allow windows to turn off this adapter to save power must be UNCHECKED
     
    • Agree Agree x 1
  6. Jester1167

    Jester1167 Premium Subscriber

    My guess is the dampers are getting clogged and starving the head for ink.

    As you print, oversized clumps of ink in the damper get shaken up and sucked into the screen. Over the years these oversized particles build up in the damper. When you stop printing and the ink flow stops, the particles fall off the screen. Also, the quicker you lay down the ink, the more you agitate the large particles which equals greater suction into the damper screen. High-speed banners will be the worst, you may be able to limp along on your highest quality settings and or slow down the head until you get new dampers...

    If you check your nozzle dropout and then do a head cleaning and you lose more, It's probably a damper.
     
    • Agree Agree x 1
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