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.

Need Help Magenta line after dark colors print

Discussion in 'Mutoh' started by Jaime IL, Apr 9, 2019.

  1. Jaime IL

    Jaime IL New Member

    19
    2
    3
    Feb 15, 2019
    Manteno
    My Mutoh Valuejet has recently been printing a small 1/8 inch magenta line after dark colors. We have recently changed our printhead, maintenance station, wiper and we do weekly cleanings. I have tried adjusting my ICC profiles (using FlexiSIGN-pro) and output color levels. The line is only printed at the top every time a dark color is printed and not on any other side. Attached are some pictures for a better description. Any suggestions/advice is greatly appreciated!!!
     

    Attached Files:

    Tags:
  2. flyplainsdrifta

    flyplainsdrifta Active Member

    583
    115
    43
    Oct 13, 2017
    ct
    does it happen on single color black?
     
  3. Jaime IL

    Jaime IL New Member

    19
    2
    3
    Feb 15, 2019
    Manteno
    Yes, on top of the single black line
     
  4. flyplainsdrifta

    flyplainsdrifta Active Member

    583
    115
    43
    Oct 13, 2017
    ct
    sorry should have been more clear. in the file make up, is it a composite black (30,30,30,100) or single color (0,0,0,100)?
     
  5. Jaime IL

    Jaime IL New Member

    19
    2
    3
    Feb 15, 2019
    Manteno
    30/30/30100
     
  6. flyplainsdrifta

    flyplainsdrifta Active Member

    583
    115
    43
    Oct 13, 2017
    ct
    reason i ask is on all of my printers that have that magenta peeking with black, it usually comes down to a ph alignment issue. not sure how the valuejet is set up or anything, but id run the alignment pattern (if there is one) and see where you are at.

    edit: try a single color black and see if the issue repeats itself on those.
     
    • Agree Agree x 1
  7. MikePro

    MikePro Major Contributor

    5,042
    259
    83
    Feb 3, 2010
    Racine, WI
    you've got cyan showing as well, in that yellow "M" logo. chances are, your printhead alignments are off.

    nozzle/alignment test prints should confirm
     
    Last edited: Apr 9, 2019
  8. henryp

    henryp Member

    320
    10
    18
    Sep 25, 2006
    Sydney Australia
    The printhead slant adjustment is most likely out, the printhead needs to be rotated so that all colors line up to the reference color.

    ice_screenshot_20190410-093413.png
     
  9. Jaime IL

    Jaime IL New Member

    19
    2
    3
    Feb 15, 2019
    Manteno
    I spent all morning doing all the proper alignments and now all the checks come back and aligned perfectly, but there is still the red line :(
     
  10. signman315

    signman315 Signmaker

    335
    101
    43
    Oct 5, 2015
    Leonardsville, NY
    could be sabre angle as HenryP described, but I don't think that would result in the prints as you showed them....really looks like a head alignment issue of one kind or another....is it along the X or Y axis that the magenta/shows? You can also see the cyan on the opposite side, what you are showing in the pics is tell tale printhead alignment issues. The X axis can be fixed with a digital calibration....the Y axis needs to be aligned mechanically by adjusting the physical position of the head (not a fun time). This is based on my experience with other machines, so Mutoh might be a little different (i.e. I might have my "X" and "Y"s mixed up) but it definitely appears to be some kind of printhead alignment issue. Have any repairs been performed recently such as a head replacement?
     
  11. Jaime IL

    Jaime IL New Member

    19
    2
    3
    Feb 15, 2019
    Manteno
    Yes we just replaced the printhead about a month ago.
     
  12. signman315

    signman315 Signmaker

    335
    101
    43
    Oct 5, 2015
    Leonardsville, NY
    That's more evidence towards a printhead alignment issue....there should be some kind of "set screw" or pin that the head sits against....that pin determines the alignment of the head on the Y axis. It's different on each printer but the point is that there is some kind of physical mechanism that the printhead sits against for alignment purposes on the Y axis. If before the old printhead was removed the location of the pin/mechanism wasn't locked in place (or not noted) then when you put in the new printhead there's no way of placing it in the proper Y axis alignment. So that's my guess of what happened....but unless you let me/us know what direction the misalignment is (can't tell from pictures) then we can't determine whether it's misaligned on the Y or the X axis. Based on the fact that you recently replaced a head I'm GUESSING that it's a Y axis issue and the head needs to be loosened and physically adjusted. But if it's the X axis then it's easier and can be adjusted via the control panel of the printer (using standard printhead alignment procedure for that machine).
     
  13. Jaime IL

    Jaime IL New Member

    19
    2
    3
    Feb 15, 2019
    Manteno
    I got it!!!! After spending all day yesterday doing manual and digital adjustments, I physically adjusted the printhead by unscrewing it and checking alignment after placement. Thank you all for your help and advice!
     
    • Like Like x 1
  14. signman315

    signman315 Signmaker

    335
    101
    43
    Oct 5, 2015
    Leonardsville, NY
    Glad to hear you got it! I was thinking that had to be the case :)
     
    • Like Like x 1
Loading...

Share This Page

 


Loading...