Heidelberg PM 74 Water Form Roller Problem

Discussion in 'Heidelberg Printing Presses' started by Navid Neoh, Jul 3, 2019.

  1. Navid Neoh

    Navid Neoh New Member

    Joined:
    Nov 2010
    Messages:
    4
    Location:
    Singapore
    Hi Guys,

    Does any one know what is the issue to cause water form roller breaking?
    This happened to my PM 74 water form roller 6-7 times within a year.

    Appreciate your help! Million thanks

    Best regards,
    Navid Neoh
     

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  2. CHOCK

    CHOCK Senior Member

    Joined:
    Dec 2016
    Messages:
    1,448
    Location:
    Managua,Nicaragua
    Hi .
    1) If you have the problem, very frequently, you must remember the system Offset is based : "Very Clean all" and Chemical-Physical condition.
    2) You must test the Ph 4.5(very corrosive!! - difficult to dry ) -5.5 very frequently, conductivity 800-1500 microhomos.
    3) Observe the tack of Ink,
    4) If the Shore grade in the roller( manufacturer0 is according with the factory of the machine, Man Roland, Heidelbeerg, i.e
    5) I strong recommend you : to ask the manufacturer of the Rollers: which is the cause, of this problem, since they
    have Test for to manufacturer the roller, they have many parameters: such: Ph, Tack of ink, shore of roller, i.e

    Blessing.
    superchock@yandex.com
    Mobile+WhatsApp:+505 8861 1441
     
  3. junker1984

    junker1984 Senior Member

    Joined:
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    667
    Location:
    US, Midwest
    Hello Navid, I see the issue is affecting operator side and damage tapers off towards mid-point. This would lead me to believe (1) your intermediate (or Z) roller hanger is not stable (2) the needle bearing in the intermediate roller is worn or (3) the crescent socket that the form roller rests in and bolted to is worn in its bracket. Remove Z and form, check Z for journal stability, free movement and proper oscillation. Check crescent socket for form roller by grabbing it and checking for "wobble".
     
  4. Navid Neoh

    Navid Neoh New Member

    Joined:
    Nov 2010
    Messages:
    4
    Location:
    Singapore
    Dear Chock,

    Thank you for your time.

    My operator had checked these setting and everything in order as normal.
    No issue with the Roller Manufacturer as this Roller is working well with others machine.

    Best regards,
    Navid Neoh
     
  5. Navid Neoh

    Navid Neoh New Member

    Joined:
    Nov 2010
    Messages:
    4
    Location:
    Singapore
    Dear Junker 1984,

    Thank you for your time and appreciated your advise.
    We will dismantle and check properly all the Rollers and the bracket.

    Best regards,
    Navid Neoh
     
  6. CHOCK

    CHOCK Senior Member

    Joined:
    Dec 2016
    Messages:
    1,448
    Location:
    Managua,Nicaragua
    Hi:
    I strong recommend you : call to manufacturer of the Rollers: which is the cause, of this problem, since they
    have Test for to manufacturer the roller, they have many parameters: such: Ph, Tack of ink, shore of roller, i.e
    and mechanical problems.
    Always the operator say the same, but ???? They are human, and they do errors.
    In my long experience for 47 years in Graphic Arts Industry and others discipline, saw many errors from operators, but they do not accept , that they do it.
    Many issue, in thir order is to due to the cause indicate above, of course is your final decission.
    Blessing.
    superchock@yandex.com
    Mobile+WhatsApp:+505 8861 1441
     

  7. turbotom1052

    turbotom1052 Senior Member

    Joined:
    Oct 2008
    Messages:
    683
    Location:
    Vermont
    do you ever hear a loud grinding noise just before the roller craps the bed? Id be looking to make sure that its not happening because the water pan is being run dry. There is no mistaking the sound of an alcolor being engaged with an empty water pan!!!
     
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