A problem in the second cycle of entering the paper for printing

Discussion in 'Heidelberg Printing Presses' started by ali 120, Nov 21, 2023.

  1. Raf77

    Raf77 Senior Member

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    Can you take a picture of whole sheet? eg. I want to see cut marks etc..
     
  2. asem alsafady

    asem alsafady Senior Member

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    Dear Ali,
    As I told you before, it's impossible to print dot over dot, you are wasting your time.
    Because at the first pass your paper will shrank, then in the second pass there's no way you can warranty all the dots will be over each other.
    Instead, you have to print darker from the first pass.
    Good luck.
     
  3. realaqu

    realaqu Member

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    pretty old rollers?
     
  4. ali 120

    ali 120 Member

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  5. ali 120

    ali 120 Member

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    What are the causes of this problem or is this normal?
    When the pressure in the blanket cylinder increases
    The distance between the blanket cylinder holder and the impression cylinder holder is reduced
    Please note that the use of this indicator has no relationship between the printing cylinder and the blanket cylinder
    https://www.raed.net/file?id=498898
     
  6. junker1984

    junker1984 Senior Member

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    Not normal. Requote..."At no time should you be able to insert feeler gauge of any thickness between plate/blanket bearer rings". The adjusting knob changes only the relationship of the blanket cylinder surface to the impression cylinder surface (under normal circumstances). Have you checked to see if the gap (space) between the plate/blanket bearer rings changes depending on rotational position?
     
  7. Raf77

    Raf77 Senior Member

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    Isn't this exactly what he asked for? I mean as I can understand he asked if when he increases impression then blanket and impression cylinders bearers getting closer to each other.
     
  8. ali 120

    ali 120 Member

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    I mean the gap between the two supports marked with the blue arrow
    https://www.raed.net/img?id=499446
     

  9. Rui Pereira

    Rui Pereira Member

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    Did you check the fiber sense? For printing whitout color variations, the right way os on the horizontal...the vertical way, u will have problems on registry. It will stretch to the sides at the end of the sheet
     
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