R706 machine not running after bell, showing brake does not release

Discussion in 'Man Roland Printing Presses' started by Rohit kutlehria, Oct 9, 2022.

  1. Rohit kutlehria

    Rohit kutlehria Member

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    Today facing a issue brake does not release error and machine not running. Checked brake operation it manually operating and input is coming in card.
    Main contactor on when giving the inch command.
    A566 relay k3 also changed.
    Not getting the issue.
    Can anyone give me the brief logic about brake operation.
     
  2. CHOCK

    CHOCK Senior Member

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    Hi sir:
    1) You must test if the contactor K022 for brake release is ON, working with +24Vdc, tight every wires, and see if ON, if is see the output contacts for +24Vdc for release brake, if does:

    2) and brake does NOT release test the limit switch in the Brake, and adjust it, or test for defective, or tight the wires, clean well, or repair or replace it.

     
  3. Rohit kutlehria

    Rohit kutlehria Member

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    K022 checked it is ok. When we operating the brake with the switch it is working and signal is also coming in card.
    During switch operation k022 is operating.
     
  4. Asim Shehzad

    Asim Shehzad Member

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    hello,
    check the k3 relay in A566 if it's working fine then check the k3 of the baumuller BKF12 drive and if your machine has simoreg then K1.
     
  5. CHOCK

    CHOCK Senior Member

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    The limit switch, must be ok, test it x defective, in order to be sure is ok.
    Other wise, test the:+24 VDC arriving to the coil of the brake??, If there are?? If there's Not the fault track to the contacts of contractor of K022, dirty or defective, or power supply for +24 VDC open, see the fuse, or Bridge rectifier defective!!

    Blessings
     
  6. Rohit kutlehria

    Rohit kutlehria Member

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    It is resolved, problem found in A566 board, k3 relay track was dry soldered. It is done.
    Thanks for your support .
     
  7. Rohit kutlehria

    Rohit kutlehria Member

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    Sir what means by simoreg.
     
  8. Asim Shehzad

    Asim Shehzad Member

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  9. Rohit kutlehria

    Rohit kutlehria Member

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    Ok sir, thanks
     
  10. Asim Shehzad

    Asim Shehzad Member

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    you are welcome
     
  11. Rohit kutlehria

    Rohit kutlehria Member

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    Sir I think you have a deep knowledge of Roland, I am learner and have many queries about Roland. Can you help.
     

  12. Asim Shehzad

    Asim Shehzad Member

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    yes, you can ask about any problem.
    +923496630209
     
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