Need some help with a polar cutter problem

Discussion in 'Cutters and Trimmers' started by PhilV, Aug 24, 2021.

  1. PhilV

    PhilV New Member

    Joined:
    Feb 2017
    Messages:
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    Location:
    Manitoba
    We recently had a "new to us" Polar 92 ED installed. Upon installation, the back gauge failed to engage high speed while positioning in automatic program mode or manual movements. No errors were recorded in diagnostics.

    Our installer reported the following:
    This malfunction was described to a Polar Specialist who suggested certain items be checked and advised that the fault may be due to a faulty frequency inverter which controls current to the backgauge motor.

    An SAP backgauge drive positioning control board and a frequency inverter were ordered with Heidelberg parts. A Lenze programming unit was used on the frequency inverter to view and possibly change/correct settings, but the display on the programming unit did not illuminate and was unuseable, meaning the inverter is causing this or the programming unit itself is at fault .

    The new SAP control was installed with no change or correction of the speed failure. A new inverter has been ordered but has not arrived at this time.

    Heidelberg service was asked to provide service assistance as the Polar Specialist had no prior experience with this speed problem.

    If anyone has any thoughts or suggestions at this point, it would be very welcome.

    Thanks
    Phil
     
  2. Mathew

    Mathew Senior Member

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    Location:
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    Can you see the measuring position value on screen? Does the value change while the backgauge move forward or backward?
     
  3. CHOCK

    CHOCK Senior Member

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    Hi sir;

    If the problem is now, with the Display is Not illuminating, check this;

    1) please if the Screen has baterry , and measure the voltage and replace it if have

    2) test the ribbon or flat cable for display and replace it , if necessary

    3) measure the high voltage for Display if there , aprox 208Vdc, depend of the mark of display,

    4) If everything is o.k clean the connectors, look for loose cable, corrosion, and Reset the CPU, in the Electronic board where is located the CPU, has small button for Reset.

     
  4. Mathew

    Mathew Senior Member

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    He is talking about the display on inverter not the main display.
     
  5. PhilV

    PhilV New Member

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    Location:
    Manitoba
    We can see the position value on the main screen. And it does change when we move the backgauge.
    The display on the programming unit does not display. We are waiting for a different inverter to arrive.
     
  6. Mathew

    Mathew Senior Member

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    If you can still move the backgauge, I would say the inverter is fine. Maybe the program panel is defective. Can you set any measurement? Would the backgauge move to that position?
     
  7. CHOCK

    CHOCK Senior Member

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    Hi sir;
    Follow the steps;

    If everything is o.k, the problem is Display LCD faulty.


    1) please if the Screen has baterry , and measure the voltage and replace it if have

    2) test the ribbon or flat cable for display and replace it , if necessary

    3) measure the high voltage for Display if there , aprox 208Vdc, depend of the mark of display,

    4) If everything is o.k clean the connectors, look for loose cable, corrosion, and Reset the CPU, in the Electronic board where is located the CPU, has small button for Reset.

     
  8. Mathew

    Mathew Senior Member

    Joined:
    Apr 2010
    Messages:
    452
    Location:
    Kolding-Denmark
    He has no problem with the main display, he is talking about inverter programming module from LENZE......
     

  9. CHOCK

    CHOCK Senior Member

    Joined:
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    Location:
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    Sir :
    display however Will be there Has the same technic troubleshooting x LCD.
    Sorry

    Blessing
     
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