I want the correct measurements between the blanket holder and the impression holder

Discussion in 'Heidelberg Printing Presses' started by ali 120, Jan 30, 2023.

  1. ali 120

    ali 120 Member

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    I'm working on a 1989 GTO color machine. I want the correct measurements between the blanket holder and the print holder.

    Because it shows this problem in the impression swatch

    [​IMG]
    [​IMG]
    [​IMG]

    This problem also appears after adjusting the sizes between the blanket holder and impression holder.
    The size is 0.10 mm
    And between the blanket holder and the impression holder 0.35
     
  2. junker1984

    junker1984 Senior Member

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    Yes, when on impression, there should be .35 between bearers of impression and blanket. There is no prescribed gap between plate/blanket, pressure must be set using .1 strip and adjusting pressure by referencing pointers on side frame. If you’re having a problem with image area, as I see it, you should first be sure the impression jacket is properly installed, and then you may have to measure for a possible caved in blanket and impression cylinder.
     
  3. ali 120

    ali 120 Member

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    The thru jacket is installed correctly, but when the index is higher than 0, this problem occurs
    The higher the indicator level, the higher the 0 level
    Not worth the impression cylinder
    Does all cylinder impressions have to be equal
    This problem appears in the impression cylinder, not the endothelial cylinder
     
  4. junker1984

    junker1984 Senior Member

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    Do breakaway dry solids, meaning you must run sheets with dampeners off, starting on normal squeeze and incrementally backing off pressure evenly until you see image “breaking up”. Show us pictures of the results.
     
  5. ali 120

    ali 120 Member

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    Please explain more
    upload_2023-1-31_21-59-49.png
     

  6. ali 120

    ali 120 Member

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    Also shown after adjusting the sizes between the blanket holder and the print holder.
    The size is 0.10 mm
    When the machine is running a full cycle and the measurement is re-measured again, you will find that the measurement is different and that the pressure is between the blanket holder and the print holder.
    become less than
    0.10 mm
    What is the cause of the problem
     
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