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Komori L 428 registration Issues

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  • Komori L 428 registration Issues

    I have a Komori L 428 year 1999 , I am having this issue with color registration when i print 4 colors , Unit 2 or Magenta does not register , what exactly happens is this , when i print 4 colors all other colors register and the registration marks align perfectly , Unit 2 does not. The operator side registration marks are perfect the opposite side their is a misalignment the register marks either move in or move out , The top and bottom of the sheet registers perfectly . Will any of you be able to give me some advice what is going wrong? what do i need to check. Can some one suggest ?
    Last edited by Bala; 05-17-2018, 01:57 AM.

  • #2
    cylinder thrust bearings?

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    • #3
      Does thrust bearings cause this problem ?
      Any way I can find out it is the thrust bearings ?

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      • #4
        I dont know how Komori adjustment plate on cylinder works, but Manroland have servo drives with potentiometers that indicates the position. We had a lot of problems with theese potentiometers, but once you get it, it is easy to replace them. They use them everywhere - zone servos, paper thickness setting etc. It looks like this: https://goo.gl/images/LsZC3g

        First you need to diagnose if the problem is mechanical or electrical. There are also usually excentric screws for plate adjustment (search in your manual)

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