double-sheet detector Problem (ultra sonic)

Discussion in 'Heidelberg Printing Presses' started by silverlake, Feb 7, 2014.

  1. silverlake

    silverlake Member

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    I have cd 74 5 heidelberg My double-sheet detector Ultra sonic is not working , so i shut it off .Any body can help me at this movement to cheack it out , ? thanks in advance .
     
  2. silverlake

    silverlake Member

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    21 exheidmech mrheidelberg
     
  3. ricker5150

    ricker5150 Member

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    it could be out of alignment...or the wires got disconnected. I had similar problem and it was out of alignment, mechanic placed a mirror under ultra sonic (off to the side) to check alignment, adjusted it, and all was fine.
     
  4. silverlake

    silverlake Member

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    Thanks ricker , can any body else give me another clue
     
  5. bopster

    bopster New Member

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    Location:
    uk
    check the sensor heights. the bottom one (transmitter) should be 7mm below the feed board and the top one (receiver) should be 33mm above the feed board.
    At 310 degrees the led should be green when a sheet is on the feed board.
     

  6. exheidmech

    exheidmech Senior Member

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    When I have found a ultrasonic double sheet detector not working I replaced it. Problem solved.
     
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