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JV3 160 printing unwanted lines

Discussion in 'Mimaki' started by artcraft, May 20, 2011.

  1. artcraft

    artcraft New Member

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    May 20, 2011
    New to the forum and I have a problem with my jv3 printing cmyk lines on images. Lines are solid color and they are not always in the same spot and will appear and disappear without warning. It has happened on many different images. I have attached an image and this one is a magenta line that starts and stops within 6". Sometimes I can print a 1'-20' run with no problem and other times it will have 1-3 lines. The lines are not always in the same spot or print the same length. I run 24"-54" matieral and run flexi 8.1. Any direction to correct problem would greatly appreciated.
     

    Attached Files:

    Tags:
  2. WrapperX

    WrapperX Active Member

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    Dec 18, 2009
    All the same color? could be a data issue - not necessarily a data cable issue but the head interpreting the data incorrectly which would probably mean the head is malfunctioning.
     
  3. J Hill Designs

    J Hill Designs Major Contributor

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    clean encoder strip maybe?
     
  4. artcraft

    artcraft New Member

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    May 20, 2011
    different colors, either black, cyan or magenta, solid line and separate lines of 1 or 2 colors in different areas of the print. the lines run on the Y axis. A line can start 2 feet in to the job and 4 inches in from the edge, run 6"-6' and go away. At the sametime this can happen on the same job with another color in a different area.
     
  5. insignia

    insignia Very Active Member

    +1
     
  6. WrapperX

    WrapperX Active Member

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    Dec 18, 2009
    Doesn't the encoder only tell the Head where it is on the X axis? it doesn't deal with the data being told to the Print Heads to print. I'm thinking this is a data cable or print head issue. But I may be way off.
     
  7. insignia

    insignia Very Active Member

    Dirty/defective encoder strips can cause odd print anomalies. I've never seen one quite like this, but it's not impossible.
     
  8. artbot

    artbot Very Active Member

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    Feb 18, 2010
    Houston TX
    i'm guessing one of your ribbon cables has a damaged or bent tip. turn off, switch off the back, unplug, press the front button four times. take your magenta cable off inspecting inside the print head ports with an led mini flashlight. look at the ends of the cable for bent tips or damage or ink, or not properly seated. because it's one line and not several, printing a quick rectangle, it's probably just one single part of the data ribbon.
     
  9. artcraft

    artcraft New Member

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    May 20, 2011
    Thanks for all the info. I have attached some more pictures from a job printed today. It was a 2x3 print, first 2 no problem second 2 lines appeared, aborted print and ran 2 more prints with no lines. Lines can be as fine as a dot or 1/4 inch wide.
     

    Attached Files:

  10. artcraft

    artcraft New Member

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    May 20, 2011
    one more picture
     

    Attached Files:

  11. artbot

    artbot Very Active Member

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    Feb 18, 2010
    Houston TX
    attached is a pic of what my printer was doing with a loose black ribbon. the issue started out as random 1x2 retangles. then went bizerck.

    also attached is a rendering of a data swap. you might be able to utilize this to attempt to isolate or move the issue to a different head.

    whatever the case, it is definitely looking like a data issue.
     

    Attached Files:

  12. artcraft

    artcraft New Member

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    May 20, 2011
    Thanks, will try and update everyone next week!
     
  13. sha

    sha Member

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    Apr 1, 2009
    I had a similar problem but only one color was appearing from time to time. It was a break in long flat cables from slider board to main board. When a machine is printing chain is moving flat cables along with ink tubes and when problematic part of the cable is triggered usually result in printed line like on your pictures. Try to rearrange cables and ink lines inside a chain.
     
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