Roland 200 - Registration Problem

Discussion in 'Man Roland Printing Presses' started by Fawzi_Albasha1, Mar 7, 2023.

  1. Fawzi_Albasha1

    Fawzi_Albasha1 Member

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    Hello everyone,

    I have been facing an issue with the registration on the Roland 200 machine (2-PUs). The problem is with one set of the grippers on the first cylinder. Its only with the first unit.

    What happens is that the print on the first sheet and the second sheet are off by around 1 mm.

    I adjusted the eccentric bolt on the side of the cylinder to compensate the difference but there is still a difference of around 0.5 mm and the bolt is already rotated to the maximum position.

    Another thing I noticed is the grippers seem to apply pressure on the blanket, you can see marks on the blanket. I am not sure what the problem could be or what to check in order to fix the issue, but some guidance might help.

    Thank you
     

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  2. mantman

    mantman Senior Member

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    I think you need to change the pads of impression grippers
     
  3. Fawzi_Albasha1

    Fawzi_Albasha1 Member

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    I have changed the pads with new ones but the issue still persists. It didn't make any difference.

    Any other suggestions?
     

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  4. mantman

    mantman Senior Member

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    You changed both impression cylinder pads or just one? -its a miracle it could print!-
     
  5. Fawzi_Albasha1

    Fawzi_Albasha1 Member

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    Yes I did! The result didnt change (everything is a miracle with this machine)
     
  6. er.bajaj001@gmail.com

    er.bajaj001@gmail.com Member

    Joined:
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    Location:
    India
    It’s Time to Get your machine Serviced.
    Reach us if you need professional Service.
    Http://wa.me/918106666607
    bajajengghyd@gmail.com
     
  7. Adil

    Adil Senior Member

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    Hello sir
    please clean its clamp bar and check if any return springs are seized, lubricate with the release agent and then adjust the clamps again with a gauge of 0.03 mm, the problem of traces that you have on the support is a high pressure of the clamps, it is necessary to redo the clamp grip adjustment
    Good luck
     
    ABDALLH SANDAFI likes this.
  8. alibryan

    alibryan Senior Member

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    Might be timing on one half of the impression cylinder grippers. If you can’t get it with the cam follower, maybe you can adjust them individually? That could alsobee the reason for the blanket having gripper marks on it.

    Is the bounce even across the lead edge of the sheet?
     
    Last edited: Apr 2, 2023
  9. Adil

    Adil Senior Member

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    it is not a problem of margin, the problem of margin gives a random defect but since the problem is alternated then it is at the new transfer cylinder where there are two gripper bars
     
    ABDALLH SANDAFI likes this.

  10. drukman

    drukman Senior Member

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    Adjustment of the press cylinder gripper rollers first. You need a special tool.
     

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