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JV33 dropping colors

Discussion in 'Mimaki' started by tpllc, Sep 12, 2012.

  1. tpllc

    tpllc New Member

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    Aug 27, 2012
    We just had our head and all 8 dampers replaced..
    we are using 4 color
    But after running for a little while all of a sudden 1 side of the head stops printing a color.
    I think it might be the dampers as they are not full with ink. the are only about a quarter full. If i remember right the old dampers were full to the top of that center circle.
    Am i Correct in guessing that the head is running out of ink cause the dampers were not filled correctly?
    Any suggestions on how to fill the dampers completely?
    I tried ink fill and it dident fill them up.
     

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  2. insignia

    insignia Very Active Member

    Are those aftermarket dampers or OEM?

    We have had issues with aftermarket before, we ended up having to go back to OEM for 3 times the cost, but they work better.
     
  3. tpllc

    tpllc New Member

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    Aug 27, 2012
    they are OEM dampers
     
  4. insignia

    insignia Very Active Member

    And you're sure they're seated properly with no air leaks? It's not unheard of to get bad dampers right out of the box, even OEM, so you might just have some bad ones. Is any ink spraying at all or is that half completely blank?

    Have you tried doing a few more ink fill-ups to see if you can just get some more ink flowing into/through them?
     
  5. tpllc

    tpllc New Member

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    Aug 27, 2012
    We were in the middle of a run and the right cyan dropped out.
     

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  6. SightLine

    SightLine Very Active Member

    Have you replaced the capping top on the capping station too? Probably a good idea. Almost looks like it is no longer getting a good seal which will cause dropouts as well. The pump is after the cap so if the cap top is brittle or just worn it will not seal as well anymore. Also yes, on a DX5 head with this style dampers they should be near if not totally full.
     
  7. 4R Graphics

    4R Graphics Active Member

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    Jan 28, 2008
    Dampners should be full as for filling them I use 2 syringes stick one in the bottom of the 2 dampners (of the same color) open the cart locks and pull ink into one dampner then the other (make sure the dampner is upside down when you are pulling ink into it) then remove the syringes plug dampners back in and relock cart locks.

    As for the dropping colors we have had this same problem off and on and cant tell you what the problem is as we could be printing and then BAM no magenta do nozzle check no magenta in one side do a normal clean and its back and print 50 60 70 feet by the end of the day and never see the problem again. Heres is the weird part problem went away (no parts were replaced) for several months then one time and hasnt been back again. No idea what it is.
     
  8. benjercorp

    benjercorp Member

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    Nov 10, 2008
    I seen dampers where much less than half full and still works champ
    Must Check top adapter for damper, Print head manifold, the damper itself and the capping ...
    That is where the problem is coming from ...
    BJ
     
  9. Out There

    Out There Member

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    Sep 24, 2011
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    My CJV30 runs dampers about 1/4 full and less.

    I would also check your ribbon cables that attach to your slider board. One might have come loose. Its a long shot..but it fixed my problem awhile back.

    More than likely though it's your capping station.
     
  10. k.a.s.

    k.a.s. Very Active Member

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    Aug 8, 2003
    NE ohio
    My dampers run less than half full. Push the head all the way to the left and push on the damper that isn't firing, if it drips through the head, you don't have an ink flow issue you have a firing problem.

    If you have replaced dampers and head, I'd go ahead and try the cap because its cheap but it's prolly the ribbon cables on the slider. I had this problem off and on for MONTHS. We narrowed it down to everything but the boards, my tech put my boards in another machine and they worked fine. All that was left was the ribbon cables, ordered new ones and it has worked ever since. There was nothing ever wrong with my head.

    Mimaki said they have now put a foam sponge in the plastic clip that holds those cables in place so that they can't rub against each other, put one in when you replace them.
     
  11. tpllc

    tpllc New Member

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    Aug 27, 2012
    Can you guys recommend anywhere to get the cap top?
    The drop out is now happening on the other side as well.
    I run 1 test draw and its missing magenta on the left side.
    run another test draw and the color is back and the test draw is perfect.
    When the color drops its either 100% there or 100% gone
     
  12. k.a.s.

    k.a.s. Very Active Member

    1,410
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    Aug 8, 2003
    NE ohio
  13. woahdude

    woahdude Member

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    Oct 25, 2011
    i had exact same problem and it was fixed with a new capping station (the gasket part)
     
  14. Tekkie1

    Tekkie1 Tekkie of Many Things

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    Apr 27, 2012
    Australia
    Ditto on the cap
    They need to be replaced on average every 6 to 8 months..this is from my expereince.
    Also to get the dampers full you need to remove the damper and open the valve of the ink cartridge in service mode and turn the damper upside down while holding the valve button in on the damper until its almost full, then refit and do a normal clean.
    Tekkie1:wink:
     
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