Standard Finishing
4Over

Announcement

Collapse
No announcement yet.

Water roller swollen at ends?

Collapse
Canon
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • #16
    ink form rollers set too tight to the vibrator rollers will swell on the ends like your pic shows. The side to side action of the ink vibrator against the ends of the form rollers will over time begin to separate the rubber from the metal core.

    Comment


    • #17
      Hello fellow Lithographers,


      turbotom, is correct.


      Regards, Alois

      Comment


      • #18
        Hey Tomtech, I am the press operator. And also the co-owner. We're a three person operation and most of our money comes from digital and letterpress printing, so the offset press really only gets used for special projects. You're right though, using the night latch is definitely the smart thing to do. I go through the pressures every time I use it just to make sure they're good, but a big issue is that we are not in a temperature controlled space, so they vary more than they otherwise should.

        Turbotom, the uneven stripe was really only with the water form roller. The ink form stripes all looked good. The form-to-oscillator is only ever about 3mm, if I'm remembering correctly. (But not at the shop now so the settings I have written down are not in front of me.)

        The update I have now is that I swapped out all the soft Crestline rollers on both heads as of Friday. I then set all the pressures—the water form pressure looks amazing now. So I'll do a full inking of the press on Monday and try to print, and see what I've got.

        - Lantz

        Comment


        • #19
          Ok, here's an update. I'm still having an issue with the Crestline rollers not getting sufficiently inked and that's leading to the same problem I was having before. The roller pressures are all set to spec and the stripes are fortunately nice and even now, after changing the rollers. It's Van Son ink, which I don't typically use but which I also have not had problems with. What am I missing?

          - Lantz

          Comment


          • #20
            I ran a Crestline for 20 years, its been 10 years since we bought a digital Presstek BUT I remember changing rollers about every 2 years and you have to be diligent about deglazing and rinsing with water at the end of your wash ups. As far as not getting enough ink on the water rollers, are you bridging the water rollers when you ink up? Another thing, on the Crestline dampeners I used the fountain solution they recommended, it was made by Accel and if I remember right it was a 2 part solution, not saying it made a difference but I had very little issues. You sure your form to oscillator pressures are good? Make sure you didn't miss a transfer adjustment somewhere that's not getting ink to the oscillator?



            banjoman

            Comment

            4OverStandard FinishingDuploSmartsoft (Presswise)CanonKBATharstern

            Ultimate Toon Contest 2019

            Collapse

            Ultimate Toons Contest 2019

            Ultimate Toons
            Win a 1-year Ultimate Impostrip® Automation subscription
            Ultimate Toons

            Standard FinishingDuploCanonKBA4OverSmartsoft (Presswise)Tharstern

            What's Going On

            Collapse

            There are currently 5408 users online. 88 members and 5320 guests.

            Most users ever online was 6,597 at 10:25 AM on 04-20-2018.

            Working...
            X