Cd 74 running with vario off

Discussion in 'Heidelberg Printing Presses' started by Jack liston, Nov 3, 2022.

  1. Jack liston

    Jack liston Senior Member

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    Hello gentlemen hope all is well would like advise on setting water rollers on cd 74 without vario do you have to use a lighter stripe between water form and vibrator.thanks for any tips. Jack. Ps when vario is on plate cleans up normally, when I turn off I get dry up any thoughts appreciated
     
    Last edited: Nov 4, 2022
  2. asem alsafady

    asem alsafady Senior Member

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    Dear Jack
    Set the ink strip as follows
    Dampening form to Distributor 5mm (without Vario).
    7-8mm (with Vario).
    Dampening form to the plate 4mm.
    Intermediate roller to dampening form roller 2.5mm
     
  3. Adil

    Adil Senior Member

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    Please note that intermediate roller to dampanding form roller is 3 mm
     
  4. Adil

    Adil Senior Member

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    To adjust the dampening distributir relative to the plate dampening roller the width of the contact stripe when operated with vario fonction 7-8 mm or operated without vario fonction 5 mm.
    To adjust the plate dampening roller relative to the plate the width of the contact stripe is 4 mm.
    To adjust the intermediate roller relative to the plate dampening rolller the width of the contact stripe is 3 mm.
    To adjust the metering roller relative to the plate dampening roller this adjustment must be with paper strips .
    For any other question be welcome
     
  5. Jack liston

    Jack liston Senior Member

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    Thank you Gentlemen I appreciate the support. Jack
     
  6. Adil

    Adil Senior Member

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    Good luck
     
  7. Raman karthi

    Raman karthi Senior Member

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    Dear sir,
    I'm running CD 74 2002 model machine,
    My machine there's no intermediate roller, please can you explain how much should I set roller pressure in dampening unit without intermediate roller.
    And please explain the order wise setting,I mean which roller should I set first? and then,,,?
     
  8. Adil

    Adil Senior Member

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    The question is why you dont have intermediate roller
    Normally it have this roller
     
  9. Raman karthi

    Raman karthi Senior Member

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    We bought the used machine, once it comes without intermediate roller.
    We running The machine with out intermediate roller.
     
  10. Adil

    Adil Senior Member

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    If there is not the roller you need to buy it sir , it s very important
     
  11. Raman karthi

    Raman karthi Senior Member

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    Ok sir, thanks for the advice
     
  12. Raman karthi

    Raman karthi Senior Member

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    Dear sir,
    Can run the machine always with vario mode?
    Even my machine there's no intermediate roller for now, we need to buy new rollers.
    Without intermediate roller, can I put the pressure same for form roller and vibrator roller as you have mentioned pressure?
     
  13. Adil

    Adil Senior Member

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    Yes you can sir
     
  14. asem alsafady

    asem alsafady Senior Member

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    But how could you wash up your dampening rollers.,,,
     
  15. Raman karthi

    Raman karthi Senior Member

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    Dear sir,
    Now, I stop and inch the machine and washing manual.
     
  16. Adil

    Adil Senior Member

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    He can use the plate cylinder but it s not good
     
  17. asem alsafady

    asem alsafady Senior Member

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    Yes, but he cannot switch On the dampening rollers while he is washing his rollers.
     
  18. Adil

    Adil Senior Member

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    Without intermediate roller , now wetalk about washing manually
     
  19. Raman karthi

    Raman karthi Senior Member

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    Sir, what is the main reason usage of intermediate roller in dampening system apart from it helps to wash dampening roller,
    What's other important usage? how it works in dampening system.

    Please explain, it helps me understand the important.
     

  20. Raman karthi

    Raman karthi Senior Member

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    Sir,
    For setting dampening roller pressure,

    Do we need to set the pressure 7mm to 5mmEvery time when using with Vario and vise versa?
     
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