CD 102 adjusting oscillating roller

Discussion in 'Heidelberg Printing Presses' started by Ian Neengia, Aug 5, 2014.

  1. Ian Neengia

    Ian Neengia New Member

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    Hi fellow printers ! Can anyone help me with an instruction to adjust oscillating rollers for Heidelber CD 102. A diagram or a PDF would be real nice. Thank you very much in advance.

    Best,

    Ian
     
  2. aqazi81

    aqazi81 Senior Member

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    If I am not wrong you are asking about Lateral Ink Distribution Setting, if your press is equipped with CP2000, you can change timings of the Ink Distribution by entering into printing functions menu and set the value you want. 400 is the preset value.
     
  3. Ian Neengia

    Ian Neengia New Member

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    You're correct Aquazi81. The press isn't equipped with CP2000. We do this adjustment manually by loosen the nut on the pivoting shaft on the DS. The problem is we're not sure what is the correct move.
     
  4. turbotom1052

    turbotom1052 Senior Member

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    if your looking to adjust the stroke length of the oscillating rollers then just loosen the nut with a T wrench and max it out in the slot. This will give you full oscillation from left to right. Putting the arms pivot point in the center of the slot will give you little, to no oscillation. Sometimes when the press gets older with lots of ink dried ink buildup on the roller ends, and side frames you may need to shorten up the stroke a little to avoid the press making noise.
    If your looking to adjust the dead point of the inker to distribute the ink charge from gripper to tail of the sheet, I have found that the setting is a hit or miss proposition dependent on the forms inking requirements.
     
    Last edited: Aug 6, 2014
  5. Ian Neengia

    Ian Neengia New Member

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    Thanks Turbotom ! We've been playing around but the outcomes are unpredictable. Could it be the roller itself has gone bad ?
     
  6. aqazi81

    aqazi81 Senior Member

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    Did you checked the size of the roller? What type of issue you are facing in print, density variation from lead edge to tail?
     

  7. turbotom1052

    turbotom1052 Senior Member

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    outcomes do tend to be unpredictable. Ive found that the moves you make on any given color needs to be somewhere around a 75 degree move to even show anything on the sheet. The other thing that makes these moves "unpredictable" is that often times moves are made in the wrong unit or must be made on multiple printing units to arrive at the right result. You can try to image multiple solid patches on all colors in the trim areas. These patches should run from gripper to tail at regular intervals so they can be read with densitometer. It should also be mentioned that you need to hold the oscillating arm gear as you move the press so it doesn't move when inching the machine.
     
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