SM74 main motor problem

Discussion in 'Heidelberg Printing Presses' started by mpouf, Oct 2, 2019.

  1. mpouf

    mpouf Member

    Joined:
    Mar 2014
    Messages:
    9
    Location:
    Greece
    Hello
    I have a SM74-4PH 1997 model
    Today, while printing with 11,500 sheets, a sudden noise was heard as if a strap was being rubbed and the machine stopped immediately.The problem is the main motor.We opened it with an engineer so that the bearings were down but that's not the problem.The problem is that the rotor is stuck on the coil and the spindle does not rotate.It is'nt written in CpTronic ''any error''.

    Do you have any idea what to do?
    Best Regards
     
  2. junker1984

    junker1984 Senior Member

    Joined:
    Jan 2010
    Messages:
    688
    Location:
    US, Midwest
    Have you paged through the dynamic pages 1 - 5 history of faults? I'm surprised there are no initiation errors, in current or history, but it really doesn't matter. If, as you say, the rotor is seized to the windings, a complete tear down and rebuild is required.
     
  3. CHOCK

    CHOCK Senior Member

    Joined:
    Dec 2016
    Messages:
    1,541
    Location:
    Managua,Nicaragua
    Hi sir:
    As the colleague Mr Junker say, rebuilt is required.
    You must understand, and if you read very carefully the operator manual Heidelberg, require in the sheet Schedule
    LUBE, and maintenance, any Electrical Motor, required of special LUBE every 12 Months, for to avoid happen the problem that you have now.
    Take the motor to some shop repair electrical motor, and exchange every damaged parts, or consider to replace ,for Rebuilt used electric Motor.
    Normally if there are problem Init-Test appear a message in the display.
    However if malfunction occurs while the press is running, troubleshooting can be made easier by selecting DYN-test display.
    Blessing
    superchock@yandex.com
    Mobile+WhatsApp:+505 8861 1441
     
  4. mpouf

    mpouf Member

    Joined:
    Mar 2014
    Messages:
    9
    Location:
    Greece
    Ī¤hanks for your answers
    If the rotor is theoretically correct there is a problem when it is electrically connected to the machine?Because it has to connect to the encoder it has to synchronize with some modifier?
    There is some danger?
    Best Regards
     

  5. junker1984

    junker1984 Senior Member

    Joined:
    Jan 2010
    Messages:
    688
    Location:
    US, Midwest
    Not danger, as such, but diagnostics will see issue with encoder if not calibrated, and motor will not energize.
     
Loading...