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VP-540i Clear at one end fuzzy at the other ??

Discussion in 'Roland' started by Biggermens, Jul 20, 2019.

  1. Biggermens

    Biggermens Member

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    Hi There

    Would any one know why my vp540i is printing clear on the right ( control side ) and printing fuzzy on the left side ??
    The machine is level and solid, i have also made sure the encoder strip is clean too still same thing

    Thanks
    Biggs
     
    Tags:
  2. C5 Service&Repair

    C5 Service&Repair Member

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    pics
     
  3. Biggermens

    Biggermens Member

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    Here is zoomed in picture Left & Right.jpg
     
  4. Gabil

    Gabil Gary

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    Check media flanges and left pinch rollers. Check feed motor hours, run feed motor aging test. Clean grit encoder.
     
  5. Biggermens

    Biggermens Member

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    I will double check all that, I rebuilt this machine, it is pretty much new from one end to the other

    would the vacuum affect that ??
    I do the checks and it is pulling hard, until you start to print then pretty much nothing
    I checked all the settings in versa works and its all set to strong
     
  6. C5 Service&Repair

    C5 Service&Repair Member

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    do 'Linear encoder'
    then 'Linear chack'
    then 'Linear calib',
    then the limit initialization.
     
  7. Gabil

    Gabil Gary

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    Can you send a small print/cut job on left and right side and then post the result picture here?
     
  8. Biggermens

    Biggermens Member

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    I will do all that, i am a bit more concerned about that vacuum.
    I set it from Auto to 100% and it running 100% all the time but when its printing
    cutting vacuum its running at 100% every other time its running 100% just not when its printing
    set to strong in versaworks

    The print cut is bang on, I did about 1000 decals since this morning and no problem with print cut
     
  9. henryp

    henryp Member

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    The carriage might not be parallel to the platen, I have seen this on other printers where in the gap between the pint head and the platen is not the same between the left and the right side of the unit.
     
  10. Biggermens

    Biggermens Member

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    You are probably right, not sure why it would be off, it was printing fine last week and i did nothing to it
     
  11. player

    player Major Contributor

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    Can you try it in the slowest mode where it only prints on the way up ( I forget what it is called). Maybe it's an ink/damper issue.
     
  12. henryp

    henryp Member

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    Print Uni-Directional and see if that fixes the problem
     
  13. Biggermens

    Biggermens Member

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    Looks like that fixed it, but that takes double the time :(
    must be encoder stripe ???
     
  14. C5 Service&Repair

    C5 Service&Repair Member

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    do the checks and menu items I mentioned. Should take care of it if the sensor isnt shot.
     
  15. Biggermens

    Biggermens Member

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    I did a few time, i took the encoder stripe out of my parts machine and still the same :(

    Maybe i should try to change the sensor ??
     
  16. If printing in Uni-Direction fixed, then you need to look at the head alignments. Set the base point at he problem side and perform the alignments. Would also double check the carriage height right vs leftside. I once had a customer that for whatever reason would move his printer to different locations using a forklift and ended up bowing the printer frame, but with him the print was good only in the middle, edges were less quality.

    Just my .02
     
  17. henryp

    henryp Member

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    The gap between the print head and platen is most likely not uniform across the width of the printer. You will never obtain good prints when printing Bi-Directional if that gap is not constant because the time it takes for the ink droplet to hit the media is different between the right side and the left side of your printer.

    Have a look at the attached file so you can see what I am talking about.
     

    Attached Files:

  18. Biggermens

    Biggermens Member

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    You are right, what i don't get is the machine never moved, i put a dial on it and looks like its about 0.030 off
    do you know what the tolerances are ???
     
  19. player

    player Major Contributor

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    What is the middle measuring compared to the sides?
     
  20. henryp

    henryp Member

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    Sorry, I only work Mutoh printers so I would not know the tolerances for a Roland printer. I suppose you need to find a way to make the gap equal to the side that prints OK.
     
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