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  • Weird effect on the far left of prints

    Posted by Simon Worrall on August 16, 2022 at 1:14 am

    Hi everyone.

    DETAILS:

    Roland SP540V

    Jetbest ink

    21 degrees in shop

    As per the photos, I have just noticed this effect happening ONLY on the far left of the printer (looking at it from the front)

    I havent noticed this before, probably because I dont often print the full width of the printer.

    The pattern is about 4mm repeating waves, not too noticeable, about 25mm in to the edge, and quite regular along the full length of the print.

    The vinyl is flat without ripples.

    The print here is consistent dark blue colour (printing a colour to plot lettering). The other patterns are just reflections from the shop lights.

    Of course the machine is old.

    The rest of the print is fine.

    Any ideas?

    Thanks for reading this.☺

    John Thomson replied 5 months, 1 week ago 3 Members · 6 Replies
  • 6 Replies
  • Robert Lambie

    Administrator
    August 16, 2022 at 9:20 am

    Have you tried cleaning the encoder strip?

    • Simon Worrall

      Member
      August 16, 2022 at 10:28 am

      THanks Rob.

      I actually cleaned it about a month ago cos the print was wandering.
      But I will defo do that tomorrow anyway and see if it helps.

      🤔

  • Robert Lambie

    Administrator
    August 19, 2022 at 12:22 am

    Did you have any joy in cleaning the encoder strip, Simon?
    Just curious because we had some random print issues from time to time and cleaning the encoder fixed it, each time. even though we do periodic cleaning and maintenance.

  • Simon Worrall

    Member
    August 19, 2022 at 8:19 am

    The saga so far;

    I cleaned the strip.

    Had a job printing a plane with lots of blue sky.

    The print, towards the left, was streaked.

    With some more investigation it turns out that anything with a lot of cyan in it has streaky problems.

    However, doing test prints only show that all the jets are firing perfectly, without any drop out at all, and they all seem to be firing in the right direction.

    I did some deep cleans, cleaning fluid drops in the parking bays, printing using differing profiles, print speeds and head heights, I seem to have reached a point where the prints are acceptable, although the underlying problem is still there.
    ie. I have no clue what it is other than it is somehow related to the cyan.

    So I can live with it, I guess, until my techie comes and sorts it out for me next month. I hope.

    Unless anybody else has some ideas?

    I really dont want to have to buy another printer.

  • Robert Lambie

    Administrator
    August 24, 2022 at 11:48 pm

    will be interesting to see what your tech guy says, Simon.
    the encoder strip has had us before and even after a clean, recleaning has done the trick, which I guess was because it had not been cleaned “properly”. not saying you haven’t, but our lad did it and then I did it later in the day and all was good right after. (or maybe I have a magic touch 🤔🤣)
    Hope you resolve it soon mate. nothing more frustrating. That said, our machines are HP latex.

  • John Thomson

    Member
    August 25, 2022 at 7:32 am

    Could it be the media clamp leaving a mark? I have had that before when the vinyl has been cold.

    john