Registration issue

Discussion in 'Heidelberg Printing Presses' started by Vinu, Aug 8, 2022.

  1. Vinu

    Vinu Member

    Joined:
    Dec 2020
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    Location:
    Malawi
    I have Heiderberg Pm 74/2
    On 2unit print is not registration continues
    First 2-3pages registration will be ok after that other 2pages it will moves again 6-7 pages it will be ok
    Please advise why it happening
     
  2. Mechanica Speedmaster

    Mechanica Speedmaster Member

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    Location:
    EU
    Hi,
    can you please describe a litle bit more precise your registration problems. I need to know in which direction you loose registration (lateral or circumferential direction). Does this press have a perferctor?
    Inch one sheet into the press and than open guard on the PU1 check if the sheet get lost during transmission between Impression Cylinder PU1 and Transfer Cylinder 1 or TC1 andTC2 or TC2 and TC3 or TC3 and ICPU2. You can check that by grabbing the sheet on the rear end by hand with other hand you can inch press forward.
     
  3. Vinu

    Vinu Member

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    Location:
    Malawi
    It is a perferctor machine is registration is lossing at lateral direction
     
  4. Mechanica Speedmaster

    Mechanica Speedmaster Member

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    Abot how much (in mm) is the regitration gone? Registrantion problems appears in straight mode i guess?
    If lateral than you have some issue with axial bearings either on one of the cylinders or one of the gripper bars. I would recomend first to check lateral/axial play of all paper transfered cylinders on the press.
     
  5. Vinu

    Vinu Member

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    Dec 2020
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    Location:
    Malawi
    This is how the registration is coming
     

    Attached Files:

  6. Mechanica Speedmaster

    Mechanica Speedmaster Member

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    Hi Vinu,

    i can only imagine what is wrong because you dont give me right informations or any informations. I can imagine according your picture that you have register issues in circumferential way and not in lateral as you said. I can see there is also some damage on the paper sheets at the front edge, the print quality is terrible!My recomendation for you is that you call some HD service technician to fix you your press.
     
  7. Beguin

    Beguin Senior Member

    Joined:
    Jan 2020
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    Location:
    Côté d'ivoire
    hi dear sir, please take several good pictures so that we can properly analyze your problem. thank you very much

    need good picture and indicate your concerns on these picture.

    Regards,
    Beguin
     

  8. Adil

    Adil Senior Member

    Joined:
    Nov 2021
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    Location:
    Casablanca
    Since the problem is random, it can be a problem with the gripper opening roller, a problem with the grippers stuck on the regroupement tambour bar and the reversing tambour , and in the worst cases it can be a rack and pinion problem. worn
    In this type of machine the overflow of the dampening solution is always the cause of this type of problem
    Good luck
    Instagram : adilberg.tec
     
    Last edited: Aug 12, 2022
    Mechanica Speedmaster likes this.
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