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SP300V factory test print not 100% black?

Discussion in 'Roland' started by geckophoto, Mar 29, 2019.

  1. geckophoto

    geckophoto Member

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    Dec 26, 2017
    Ft. Myers
    So I have done a head soak to keep my heads from drying up while fixing my machine, SP300V, I noticed in the K/C cap it seemed to have a lot of C ink in it. I got my machine running again and the first nozzle check it seemed like the K nozzle was printing more like C, not a solid black color, running a few cleanings and more test prints it seems like it coming back to a solid black color.

    I now just printed the test print with the color swatches thru Versaworks and the 100%K looks a bit cyan/faded light? On the gradation scale it looks fine until it gets to 100%K and there it has a cyan tint? How can this physically happen when only black ink line goes to the print head? Could have some cyan ink soaked up into the black print head and I am getting a color shift till it is printed/drained out?. I'm not talking color calibration when printing a file, this is the factor color test print I will post pics of it next, the nozzle check also shows the black head printing but it doesn't seem to be a solid black color?

    I did take out the ribbon cables when replacing my encoder sensor and just put the ribbons back in the proper slots. Nozzle check looks fine. Any ideas?
     
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  2. geckophoto

    geckophoto Member

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    Dec 26, 2017
    Ft. Myers
    Here are test file prints.
     

    Attached Files:

  3. Glennora

    Glennora New Member

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    Aug 11, 2005
    Michigan
    That's happen to me. (same printer) Some cyan has back flowed into the head/damper/ink supply tube (depending on the amount of migration). Mine was Magenta in the yellow after a head soak. (Easier to see in test print) Cleaning cycles and printing all day didn't clear it up. I end up unhooking the exit hose below the cap at the Y before it goes into the pump and using a syringe to manually pull/prime the tainted ink through. "Wasted" 5-10 ml of ink, but was back to printing fine immediately. Hope this helps.
     
  4. Jim Hill

    Jim Hill Active Member

    Because the cleaning solution attacks the hoses and the rubber in a syringe I started used a brake bleeder that is normally used for bleeding brakes on a car.

    I found this to work much better then using a syringe. The cleaning solution also attacks the hoses on the brake bleeder.

    Jim
     
  5. geckophoto

    geckophoto Member

    64
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    Dec 26, 2017
    Ft. Myers
    Thanks I'll try it and draw some black ink thru to manually flush it from the damper. But any idea why in my test print you can see the 100% K swatch going cyan when all the other K swatches are nice and gray/black? You can also see it at the end of the white to black gradation strip...
     
  6. Glennora

    Glennora New Member

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    Aug 11, 2005
    Michigan
    The printer also "makes" black by using M,C & Y. (no need to use the B) This is similar to a RGB Black and mixing paint. You can get a nice black with paint by mixing all the primary colors together. I haven't actually mastered creating a print file where I can "force" the printer to use only the black cartridge. Hope this helps
     
    Last edited: Apr 3, 2019
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