Polar 76 EM cut problem

Discussion in 'Cutters and Trimmers' started by JF78, May 31, 2018.

  1. JF78

    JF78 Member

    Joined:
    May 2018
    Messages:
    5
    Location:
    South Europe
    Hi All
    I have problems whit Polar 76 EM, when the cut secuence starts, stops whituot complete the cicle, when knife it has gone down 20 mm more or less.
    The system have a MHY control board, stops when sensor B2 comes. I measured the supply voltage on B2-B2, have 18 Vdc. Have some diferences whit supply voltage on B1-B4, what is 24 Vdc.

    Anyone know if this difference in the supply voltage is normal?
    Suggestions??

    Thanks in advance
    Cheers
     
  2. CHOCK

    CHOCK Senior Member

    Joined:
    Dec 2016
    Messages:
    868
    Location:
    Managua,Nicaragua
    Dear Sir:
    Hope you are well
    The MHS has 2 Voltage +5vdc for input +24Vdc
    1) Measure the +5vdc will be o.k the tolerance will be o.7% up or down.
    2) Measure the +24Vdc for Sensor with the same tolerance mentioned above, when you say 18Vdc, is sign the Power supply
    is faulty: Repair or Replace.
    Let me know.
    Blessing.
    superchock@yandex.com
    celular+WhatsApp:+50588611441
     
  3. JF78

    JF78 Member

    Joined:
    May 2018
    Messages:
    5
    Location:
    South Europe
    Dear Sir,
    Thank you for your reply.
    The control board for the sensores knife, shows MHY not MHS. Have only one input of 24vac volts. Is It the same as you?
    Regards
     

  4. CHOCK

    CHOCK Senior Member

    Joined:
    Dec 2016
    Messages:
    868
    Location:
    Managua,Nicaragua
    Yes is the same.
    When i did explain +5vdc is Vcc, for Board MHY-MHS is for Relais K1 +K2 (+5VDC) , and the output through the MHY-MHS is +24vDC for Sensors.
    Let me know
    Blessing.
    superchock@yandex.com
    celular+WhatsApp:+50588611441
     
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