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What does this problem look like to you?

Discussion in 'General Chit-Chat' started by ApexVinyl, Mar 15, 2020.

  1. ApexVinyl

    ApexVinyl Premium Subscriber

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    Sep 30, 2019
    Kaukauna, WI
    Printing on my CJV30-130 and getting anomalies in my green, yellow and black all of a sudden. Using solid colors directly from flexi, 12 pass unidirectional CMYK....orajet 3651 vinyl

    I've done a nozzle wash for two hours separated with new fluid each hour....wiper is clean and in good shape. Print head is new.

    Contaminates on vinyl maybe? Test print comes out good.

    https://photos.app.goo.gl/WLpABkgdKY2EmJtJ8

    https://photos.app.goo.gl/1NipkxVqkMQQ22Cd6

    https://photos.app.goo.gl/T1gLHum1tLnmwa3R6
     
    Last edited: Mar 15, 2020
    Tags:
  2. TimToad

    TimToad Very Active Member

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    Jun 13, 2013
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    Have you run out a few more feet of media and tried to print again? What about a different media?

    Start with simple solutions before suspecting its the printer.
     
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  3. ewded

    ewded Member

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    Too much ink + low heat. Try more passes or/and higher heat settings. What you see is ink gathering around dust particles as they are not absorbed by the media quick enough. You can actually see the dust in the middle of the patch.
     
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  4. Saturn

    Saturn Member

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    Aug 14, 2018
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    Looks like simple dust to me. Tim's suggestions are sound.

    Keeping the shop relative humidity at 40-60% can help keep the dust out of the air too.

    For solid colors/heavy ink coverage stuff I do try to run those jobs specifically a bit further into the day's workload so that any dust has already worked it's way out of things.
     
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  5. ApexVinyl

    ApexVinyl Premium Subscriber

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    Sep 30, 2019
    Kaukauna, WI
    Hey everybody I appreciate the help on this. I've never encountered it this bad before....

    I tried upping the heat to 40 40 50 and did 24 pass and it actually made it worse. Also precleaned the media and dusted it with a swifter in one direction before printing. It looks almost like a bit of water was in some places and then others I can see with dust. Really confused. Might just have to come back to it and try again tomorrow. It sucks because I just wanted to run off some bumper stickers and I have a big sticker order coming up and I'm hoping it doesn't end up looking terrible like this.
     
  6. Saturn

    Saturn Member

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    Aug 14, 2018
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    I've never had good luck cleaning material unless it was do-or-die. I just make sure the platen and rollers are relatively clean and then go back into the roll until I reach virgin, never seen air, vinyl and try printing on that. The more you handle stuff the worse it gets generally.
     
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  7. ApexVinyl

    ApexVinyl Premium Subscriber

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    Sep 30, 2019
    Kaukauna, WI
    I'll give it a shot but my only other thought is that the roll is contaminated.

    But for kicks I printed a high quality photo and it printed just fine with no defects. So now I'm wondering if it's the color management...
     
  8. TimToad

    TimToad Very Active Member

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    CA
    The photo was printed using the same media and same settings?

    What are you "pre-cleaning" the media with?

    The stuff comes off the roll about as "clean" as it will ever be. Any cleaner, wipe, etc.. we apply to it only risks contamination.
     
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  9. ApexVinyl

    ApexVinyl Premium Subscriber

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    Sep 30, 2019
    Kaukauna, WI
    Yes the photos were printed at the same settings and same media. I can't find any issues in either of them (one at 12 pass and one at 24)

    I used a new swifter duster and then hit it with a tac cloth, just rubbing it lightly with no pressure.

    It's just strange that the spot colors are having such a hard time but I can print photos with the same settings either 12 pass or 24 just fine.
    Heat is at 45 45 50 now. Doesn't seem to help either.
     
  10. Andy D

    Andy D Very Active Member

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    9 times out of 10 when people post pictures of problems with their prints, too much ink is at least part of the problem... I have posted that so many
    times, I'm getting sick of seeing my own posts...
     
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  11. rjssigns

    rjssigns Major Contributor

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    "Fisheyes" just like auto paint. Surface is contaminated. Wipe with 90% IPA. Make sure material is dry before printing.

    I have some 4mil matte in stock that had did the same thing at the beginning of the roll. Just remembered I had some banner do the same thing. Cured both with an IPA wipe down.
     
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  12. Rick Tennyson

    Rick Tennyson Member

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    It’s simple static dust particles.
     
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  13. MikePro

    MikePro Major Contributor

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    i used to have this problem on my mimaki, and thought it was contaminated roll, but problem persisted throughout multiple rolls..... but it was actually flecks of debris being kicked-around by the carriage belt during operation, raining-down onto the print.
     
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  14. rjssigns

    rjssigns Major Contributor

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    That's a new one. But dust only collects on parts we can see.:rolleyes:
     
  15. ApexVinyl

    ApexVinyl Premium Subscriber

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    Sep 30, 2019
    Kaukauna, WI

    I think so too at this point. Trying to eliminate the problem but I'm already a clean freak
     
  16. ApexVinyl

    ApexVinyl Premium Subscriber

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    Sep 30, 2019
    Kaukauna, WI

    I'm actually starting to wonder if this is happening. I think you have confirmed my suspicions. I know for a fact the media was free of static and dust on my last run and I still got contaminates. I'm going to have to talk to my printer guy and see if this has happend before. The machine is 9 years old so the belt could be degrading. Thank you for that!
     
  17. Alan Menhennet

    Alan Menhennet New Member

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    Jul 8, 2018
    Johannesburg
    I had this on my Chinese printer... After i flushed solvent through the head i had some more of them and then the head was clean. Looked like blotches of dried ink particles.

    Dust on the vinyl is makes clear spots, what this looks like is blotches of ink.
    What inks are you using?
     
  18. ApexVinyl

    ApexVinyl Premium Subscriber

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    Sep 30, 2019
    Kaukauna, WI
    It ended up being a combination of several things. Dirty encoder strip, static and the main carriage belt. All better now. Thanks to everybody that posted a tip! Hopefully this thread helps somebody in the future too.
     
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