XL 105 Feeding Issue with Synthetic Stock

Discussion in 'Heidelberg Printing Presses' started by Mattman, Apr 11, 2019.

  1. Mattman

    Mattman New Member

    Joined:
    Apr 2019
    Messages:
    2
    Location:
    Montgomery, AL
    Our company has a LARGE job coming in a couple weeks that will run on YUPO Accel 78# 6mil Text 23 x 35.

    We got 1000 sheets in to do a test run to see how well our ink would dry. Little did we know, the problems that we'd run into would be getting this stuff to feed. At first it seemed to be terrible static, but the techs that came to run the test with us didn't detect any static, and the sheets we backed up still did the exact same thing.

    The main issue is happening at the grippers. When the sheet reaches the grippers, they are folding up a bit, and then a sheet will eventually jump the grippers and get torn to shreds. We placed the flaps down over the feeder board and that seemed to help a small bit with keeping the sheet from folding up, but we still weren't able to get it to run over 4000 an hour before we ran out of our test stock. The company is going to send another 3000 sheets for us to test again. I'm just looking for any advice from anyone who might have experience running large sheets of synthetic stock. This stuff is super slick.
     
  2. Mattman

    Mattman New Member

    Joined:
    Apr 2019
    Messages:
    2
    Location:
    Montgomery, AL
    We're running the belt suction at 100%. We've tried lower percentages with no change.
     
  3. CHOCK

    CHOCK Senior Member

    Joined:
    Dec 2016
    Messages:
    1,448
    Location:
    Managua,Nicaragua
    Hi sir:
    I am asking if there some error messages in the display ??
    or 1) Call the supplier of material, and explain.
    2) Call to the factory, and ask them ,how to handle special materials in the Feeder, since they contact with all supplier for to test the Feeder and many devices.
    Blessing
    superchock@yandex.com
    Mobile+WhatsApp: +505 8861 1441
     

  4. turbotom1052

    turbotom1052 Senior Member

    Joined:
    Oct 2008
    Messages:
    683
    Location:
    Vermont
    Are the "techs" that you refer to that came to run the test with you reps from the mill or stock vendor? If they are you may want to try having your stock dyne tested by an independent testing facility. The corona treatments that are just about mandatory for these types of stocks to run reliably, have a limited window of time. If the stock has been sitting in a warehouse for any length of time since its corona treatment that just may be the issue. If the corona treatment has expired then I would say that feeding issues will be the least of your problems. Just wait until you add ink and see how the stuff dries, unless of course your running a UV process!!!
     
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