Welcome To Signs101.com: Largest Forum for Signmaking Professionals

Signs101.com: Largest Forum for Signmaking Professionals is the LARGEST online community & discussion forum for professional sign-makers and graphic designers.

 


  1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Vs-540i Unusual printhead problem

Discussion in 'Roland' started by Adam Edge, May 28, 2019.

  1. Adam Edge

    Adam Edge New Member

    6
    0
    1
    May 15, 2019
    Sydney Australia
    Hi guys,

    Having an unusual problem with LC on Vs-540i. Before i describe the issue please note I have been working on my machines to several years and pretty familiar with them. The images will give you a better idea. I've always used OEM link but tried Sam ink. only used on LC and LM. Currently Sam ink in LC. Was it just bad timing or Sam ink damaged the printhead?

    Contacted Sam ink, they sent another LC cart and cleaning carts to do a flush.

    Steps taken:
    Replaced all dampers
    Replaced cap station
    Replace Choke on LC
    Replaced LC ink cart with a new batch from Sam ink
    Removed ink line from back of cart to see if there is a ink flow issue
    Flushed using 440ml cleaning crts
    Several auto and manual clean cycles

    After doing all that nothing has changed. Contacted Sam Ink, a second time. they saying it either the print head or the print board.


    Image 1:
    First test print of the day after sitting overnight
    [​IMG]

    image 2
    Pulled ink with syringe, test printed without auto clean, all nozzles fire until i do a print or test print then nozzle missing again
    [​IMG]

    image 3
    Pushed ink from top of head then test print without auto clean
    [​IMG]

    image 4
    test print looks ok but all grey redish so LC starving
    [​IMG]

    image 5
    Nozzle test after above test sheet
    [​IMG]

    image 6
    Nozzle test after "Normal Clean"
    [​IMG]

    This is how it is every time no matter how many Auto or Manual clean cycle.
     
    Last edited: May 28, 2019
  2. Sorry but none of the pics are working for me......When you remove the connection on top of the printhead, are you getting Lc ink to flow from the connection? If so then perhaps the problem is electrical.

    Just my .02
     
  3. woolly

    woolly Active Member

    646
    20
    18
    Sep 24, 2007
    Cornwall uk
    far too much cross contamination mostly at the front right edge unfortunately several possibilities.
    as you said you have pushed ink from the top internal seals of the head may have failed.
    poor pump scavenging, dampers not sealing not uncommon for the old o ring to stay on the head or internal valves failed, can't comment on the ink only ever used oe,
    i have now given up on non oe cap tops and not really convinced by the non oe dampers but the price difference is a killer.
     
  4. Adam Edge

    Adam Edge New Member

    6
    0
    1
    May 15, 2019
    Sydney Australia
    Hi woollywoolly

    no i didnt really push ink, it was always doing that. i only push ink from the cart end as a last attempt ever so slightly with a small syringe, result was same as pulling ink, all nozzles fired.

    I dont think there is air leaks bcaz when i choke all colours and only allow ink flow in one line, then i pull ink with syringe the resistance I feel is consistent on all ink lines expect LC. When i choke all except LC and pull ink there isn't air bubbles but instead a lot of back pressure/ resistance.

    about the o-ring, first i swapped dampers with another, result was same, then purchased all dampers new and replaced them at the same time and all colours ok except LC, nothing changed by replacing dampers.
     
  5. Adam Edge

    Adam Edge New Member

    6
    0
    1
    May 15, 2019
    Sydney Australia
    I even swapped LC ink line with C at cart end but same result. It told me there was no ink flow issue on the lines up until damper/head
     
  6. woolly

    woolly Active Member

    646
    20
    18
    Sep 24, 2007
    Cornwall uk
    the fault is across the bottom right corner 4 colours involved even the black is going across which is normally a cap top issue or pump.
    is there a re-circulation pump on that channel ? where it would have been a silver and what is the eighth colour
     
  7. Marcos Shirt

    Marcos Shirt New Member

    2
    0
    1
    May 29, 2019
    Spain
    You have cross contamination. It can be due to bad sealing on the capping (review the 3 axis parking position, specially the vertical sealing -too close is bad due to pad fibers causing capilarity, and too loose brokes the vacuum sealing needed), or the tubes from capping to pump have air leak or clogged with dry ink, or the pump not working well.
     
  8. Adam Edge

    Adam Edge New Member

    6
    0
    1
    May 15, 2019
    Sydney Australia
    yes its not used, only 7 colour, no white or metallic, re-circulation pump on channel 8 with cleaning fluid. If it was the cap top or pump why only one channel is bad. Dx7 so only 1 head and 1 cap top. Two pumps connected to 1 cap top. I've swapped pump lines numerous times
     
    Last edited: May 31, 2019
  9. Adam Edge

    Adam Edge New Member

    6
    0
    1
    May 15, 2019
    Sydney Australia
    problem is LC is starving of ink, after pulling ink with syringe and all nozzles fire with ink and i do a small print LC stops flawing into the head so it doesn't put down ink on all nozzles. its either ink flow issue or some low current/electrical problem
     
  10. C5 Service&Repair

    C5 Service&Repair Member

    328
    42
    28
    Jan 14, 2018
    Omaha, NE
    looks like the manifold in the head is broken. either that or your cross contamination is so bad that your dampers are also contaminated with the wrong color ink.
     
  11. FrankW

    FrankW Very Active Member

    1,323
    135
    63
    Oct 19, 2008
    Germany
    Check the nozzle plate for damage. Sometimes deep scratches guide to cross contamination.
     
  12. Marcos Shirt

    Marcos Shirt New Member

    2
    0
    1
    May 29, 2019
    Spain
    Well, if your only remaining problem is Lc starving (I don't think it is an electrical issue as when you fill the printhead manually, it prints) go and review backwards from the nipple: dampers, tubing, valve, needle and cartridge to see where the ink gets trapped. Also, perhaps you have an air leak in the ink circuit.
     
Loading...
Similar Threads - 540i Unusual printhead
  1. tery
    Replies:
    4
    Views:
    173
  2. Joe Mc
    Replies:
    3
    Views:
    267
  3. design unfolds
    Replies:
    16
    Views:
    436
  4. CCG3
    Replies:
    3
    Views:
    358
  5. smiley
    Replies:
    2
    Views:
    617

Share This Page

 


Loading...