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.

Why are my prints so grainy?

Discussion in 'Digital Printing' started by CBilkes, Feb 7, 2020.

  1. CBilkes

    CBilkes New Member

    13
    1
    1
    Feb 5, 2019
    Kansas
    I'm running a Roland SG-540 on various types of media, using various profiles, but all of my prints come out grainy. I just printed some decals on Arlon to show as an example. Very grainy and and some banding as well. I checked my calibrations and everything seems fine. Any ideas why this is happening? Thanks for any help.
    IMG_3334.jpg IMG_3335.jpg
     
    Last edited: Feb 7, 2020
    Tags:
  2. iPrintStuff

    iPrintStuff Prints stuff

    656
    162
    43
    Sep 3, 2018
    United Kingdom
    Probably best showing a nozzle test too. Always your first check
     
  3. CBilkes

    CBilkes New Member

    13
    1
    1
    Feb 5, 2019
    Kansas
    Sorry yeah here's a couple nozzle tests
    IMG_3340.jpg
     
  4. bob

    bob Major Contributor

    5,257
    303
    83
    Nov 4, 2005
    earth
    Jack up whatever dither algorithm you're using to the highest possible, likewise gradient handling, and check your heater settings.

    That's the obvious stuff, from there it gets interesting and beyond a primitive back and forth on this sort of forum.
     
  5. CBilkes

    CBilkes New Member

    13
    1
    1
    Feb 5, 2019
    Kansas
    Thanks, I'll try your suggestions. For the heat settings, do you think my current heat is too low or too high?
     
  6. Solventinkjet

    Solventinkjet DIY Printer Fixing Guide

    3,911
    706
    113
    Aug 2, 2011
    Denver, CO
    I would check your head alignments and fine tune them. Looks like you are getting some slight banding which could be the feed calibration as well. The nozzle check looks pretty good but the cyan is deflecting a little which could be causing some issues. You also have a little cross contamination in your yellow which tells me you may need to do some cleaning of the head and maintenance parts or possible the wiper and/or cap top are starting to fail.
     
  7. Greg Kelm

    Greg Kelm Member

    74
    10
    8
    Aug 20, 2019
    Rancho Cucamonga
    Head height set to high?
     
  8. CBilkes

    CBilkes New Member

    13
    1
    1
    Feb 5, 2019
    Kansas
    Thanks for the info! I run a manual clean on it once a week. Wipers were replaced a few weeks ago. I'll check my feed calibration and see if that helps the banding. What can I do about the Cyan deflecting?
     
  9. CBilkes

    CBilkes New Member

    13
    1
    1
    Feb 5, 2019
    Kansas
    Yes height is set to high
     
  10. 2B

    2B Very Active Member

    2,979
    365
    83
    May 5, 2011
    TX
    what are your print settings?
    * bi-directional / unilateral?
    * how fast production / standard ?
     
  11. Greg Kelm

    Greg Kelm Member

    74
    10
    8
    Aug 20, 2019
    Rancho Cucamonga
    Lower it and run the same material. We would have the same issue when we'd forget to drop the head back down after running some thicker material.
     
    • Like Like x 1
    • Agree Agree x 1
  12. ewded

    ewded Member

    436
    76
    28
    Aug 28, 2017
    UK
    print unidirectional for a temporary solution
     
  13. ewded

    ewded Member

    436
    76
    28
    Aug 28, 2017
    UK
    then lower head and do bidirectional head alignment, step adjustment and make sure heater is on and working
     
  14. CBilkes

    CBilkes New Member

    13
    1
    1
    Feb 5, 2019
    Kansas
    Problem solved!!!

    I lowered the head height, set the print to uni-directional and it's printing perfectly now. Thanks for the help!
     
    • Like Like x 1
  15. 2B

    2B Very Active Member

    2,979
    365
    83
    May 5, 2011
    TX
    Good to hear,
    As suggested, would do a bi-directional head test & alignment.

    unidirectional is a quick fix but NOT how the printer needs to operate for 95% of prints
     
    • Agree Agree x 1
Loading...

Share This Page

 


Loading...