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Big horizontal banding SP540V

Discussion in 'Roland' started by Nismoasfuh, Nov 10, 2018.

  1. Nismoasfuh

    Nismoasfuh Member

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    Mar 11, 2016
    South Florida
    Hey all, So I have this issue with large prints where I get some serious large "banding"? Seems to be extremely noticeable when doing large print with a lot of ink. i have searched for fixes to "horizontal banding" but all threads discuss banding causes by feed calibration issues (which i have issues with as well). But this is something different, and through research it seems to be caused by "ink starvation" where the dampers are not filling up with ink essentially. My test prints are fine, however I have to always do a medium cleaning to either show the cyan (contaminated with black) and to clean the yellow from a little bit of magenta contamination. After a medium cleaning it does a fine test print. If anyone can shine some light on this issue please let me know. I have attached a picture as this will do a lot more justice than trying to explain my issue.
     

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  2. Broome Signs

    Broome Signs Member

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    Nov 1, 2018
    england
    HI

    Had this on our old 540
    are you still using the small dampers about 1" tall?
    if not you need to swap them for the hi capacity ones

    in addition try slowing down the feed rate and turn down the heaters
    also turn on auto clean and set for about 6m
    if you still have problems set to unidirectional
     
  3. Nismoasfuh

    Nismoasfuh Member

    60
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    Mar 11, 2016
    South Florida
    thanks for the reply! I'll definitely look into those when I have some free time.
    We do have the larger dampers.
    I don't want to go to unidirectional however, its going to be a big time waster. Even if nothing works.
    I never knew we could set auto clean for a set length, another thing I have to check out!
    I do believe my troubles are coming from damper/ as well as heater and feed calibration. For some reason my feed calibration looks different that everyone else's. However the rectangle/square line up fine. Thanks again for all the useful tips!
     
  4. player

    player Major Contributor

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    Apr 24, 2006
    Toronto
    Sometimes using the calibration routines in service mode can be a bit more useful.
     
  5. Bobas Kalobas

    Bobas Kalobas Member

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    Feb 19, 2008
    Baxley
    The only cure I got for this same problem on my Versacamm SP300V was to buy a better computer. I had the exact problem with medium to big prints. The guy at Pizza Hut told me to buy a computer with an i7 processor! No other brand will work, he said...As I was using a brand new computer with the most updated and large RAM, but I was using an AMD processor. In fact the AMD was faster than the i7 on paper, but not with the Roland printer! It was a COMPLETE GAME CHANGER! and I have NEVER had another problem. :)
     
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