QM start production

Discussion in 'Heidelberg Printing Presses' started by old school 52, Oct 17, 2018.

  1. old school 52

    old school 52 Member

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    Question, When I start production on this press it almost always feed 1 or 2 blanks before going on impression. Timing issue ?
    Thanks
     
  2. CHOCK

    CHOCK Senior Member

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    Hi sir:
    Hope you are well.
    You not mention if you machine is 1 or 2 colors.
    Your problem will be adjustment +or fault valves in the impression control mechanism
    However do this:
    1) if your machine is 1 color : test the pneumatic cylinder Y1 valve, if are out of adjustment, or leak or defective.
    2) if your machine is 2 colors: test the pneumatic cylinder y8 valve, if are out of adjustment, or leak, or defective
    Both of them are impression control mechanism.
    You must do adjustments.
    Let me know
    Blessing.
    superchock@yandex.com
    Mobile+WhatsApp:+505 8861 1441
     
  3. old school 52

    old school 52 Member

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    Good Morning Chock,
    This is a 2 color machine. Can the Y8 Valve be taken apart and cleaned and where may I find this valve.
    Thanks Old School
     
  4. CHOCK

    CHOCK Senior Member

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    Exactly.
    Do that sir, and test if there are out of adjustment the impression control mechanism!!
    Let me know.
    Blessing.
    superchock@yandex.com
    Mobile+WhatsApp:+505 8861 1441
     
  5. old school 52

    old school 52 Member

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    CHOCK, I have looked through the parts book I have and I cannot locate the Y8 valve on the press. I am know assuming a side frame must come off. Can I get a hint as to which one?
    Thanks
     
  6. narayan

    narayan Member

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    Cover need to remove right side from feeder
     
  7. CHOCK

    CHOCK Senior Member

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    Proceed to remove the cover from Right side.
    Let me know
    Blessing.
    superchock@yandex.com
    Mobile+WhatsApp:+505 8861 1441
     
  8. old school 52

    old school 52 Member

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    Chock, I have removed the gear side guard and found Y8. I am not seeing any adjustment on the valve. The whole system was very dirty. I cleaned as much as possible but the press still pulls a sheet early.
     
  9. CHOCK

    CHOCK Senior Member

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    Sir:
    I did indicate:
    "Do that sir, and test if there are out of adjustment the impression control mechanism!!"
    Let me know.
    send me email
    Blessing.
    superchock@yandex.com
    Mobile+WhatsApp:+505 8861 1441
     
  10. STW100

    STW100 Senior Member

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    Is this an older QM? I would check the 3/2-way valve block off lever on the non-operator side of feeder. The valve is where the black coil sucker bar hose connects. The valve has a pin sticking out to the right, riding on a lever that is operated by a cam. The bottom of this cam lever has a stop lever. Looks like upside down-reverse L. Check to see if there is a lot of excess grease where the 2 levers make contact. If so clean it off. I'm guessing the block off lever is dropping out before it is suppose to thus causing sheets to be picked up before press is ready for them.
    Stan ipsqm46.com
     
  11. old school 52

    old school 52 Member

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    Thank you for your reply I will look at this Monday
     
  12. old school 52

    old school 52 Member

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    Thanks I will check this out
     

  13. CHOCK

    CHOCK Senior Member

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