Timing disc for degree the press is at

Discussion in 'Komori Printing Presses' started by lwhiskars, Feb 13, 2020.

  1. lwhiskars

    lwhiskars Member

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    We are having a problem with the speed jumping around, and the counter freezing/stopping for 2 or 3 sheets and then continuing on and off throughout the run just started in the last few days.
     
  2. CHOCK

    CHOCK Senior Member

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    Hi , what Komori Model do you have ??
    the counter is electrical or electronic??
    However you can try with contact cleaner contacts inside of counter, and look
    for wires loose, bad contacts, or corroded wires.
    Of course possibility of mechanical adjustment with Cam and microswitch for Counter, or defective counter inside coil. Overheating !!
     
  3. lwhiskars

    lwhiskars Member

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    A 1998 L-428, electronic counter I think the press has a Varicam that controls the speed indicator and the counter whenever the speed goes out for a few seconds the counter stops for 2 or 3 and then back to normal for 50 to 200 and then the speed goes crazy for a few more seconds then back to normal. This just started maybe 3 or 4 days ago.
     
  4. hello.vijay78

    hello.vijay78 Member

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    Hi i dont understand.. do you mean the machine jerking while running? What kind of mail drive in the machine? how about the speed indicator?
     
  5. lwhiskars

    lwhiskars Member

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    No the problem is electronic, the counter stops for 2 or 3 sheets and speed indicator jumps around and even shows blank the back to the speed the press is going, The mechanical part is fine. At the same time the Varicam in the control panel at feeder goes blank for a second or two then back to normal.
    I'm trying to see where the degree wheel is so I can see if the pickup for the position of the press is not the problem
    Thanks
     
  6. CHOCK

    CHOCK Senior Member

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    Hi sir since your counter is electronic:
    please review this steps .contact cleaner contacts inside of counter, and look
    for wires loose, bad contacts, or corroded wires.
    Of course possibility of mechanical adjustment with Cam and microswitch for Counter, or defective counter inside coil. Overheating !!
     
  7. hello.vijay78

    hello.vijay78 Member

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    It looks there is some problem with the control circuit supply.. observe the control voltage... P24A - N24
     
  8. turbotom1052

    turbotom1052 Senior Member

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    Automotive tool companies make degree wheels in various diameters. If you having a problem with your electronics you could always slap on an automotive degree wheel and pointer for a few bucks to verify timing events.
     
  9. lwhiskars

    lwhiskars Member

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    I guess I thought that the press already has one on it and I wanted to locate it and make sure it or the sensor for the timing is not the problem, like a piece of trash or something like that.
    But thank you for that information.
     
  10. lwhiskars

    lwhiskars Member

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    I did check the power at the delivery panel at the speed indicator/display only fluctuating .05 volts 24.04 to 24.09 something like that.
     
  11. presselectronics

    presselectronics Senior Member

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    This is normally caused by the Varicam or the absocoder failing. If the Varicam display goes blank, replace it. If the absocoder is hard to turn, replace it. My money is on the Varicam, they are a high failure item.
     
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  12. lwhiskars

    lwhiskars Member

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    What and where is the absocoder?
    The vericam display does go blank for a couple of seconds and then returns to normal, whenever it goes blank the speed and counter mess up.
     
  13. hello.vijay78

    hello.vijay78 Member

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    it looks like the varicam has the problem
     
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  14. hello.vijay78

    hello.vijay78 Member

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    was your problem solved? what was the issue?
     
  15. CHOCK

    CHOCK Senior Member

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    What is the problem sir??

    Let me know, sincerely

    Blessing
     

  16. er.bajaj001@gmail.com

    er.bajaj001@gmail.com Member

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    You have problem with inbuilt SMPS of Varicam.
    It seems like it's droping negtive 12 volts supply or positive 5 volts.

    Open the Varicam Box. Check with a good multimeter.
    From right to left On Main Board connector
    1-Negtive Common
    2- +5v
    3- -12v
    4- Negtive common
    5- +12v
    *Please check again. It's according to my experience.

    You can contact us for more free consultation.

    mbajaj@bajajengg.com
    +9181066-66607
     
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