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Thread: A77 Synchronous Control Procedure - Y/V axis

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    Default A77 Synchronous Control Procedure - Y/V axis

    Makino A77 FANUC - Synchronous Control Procedure for Automatic Grid Alignment (Y and V axis)

    Application Software : CNC BOB1-V or later version

    Procedure:
    1. NC Parameter Setting :
    • NC parameter N8302 bit 0 = “1”. (Grid alignment function enable)
    • NC parameter N8302 bit 1 = “1”. (Grid alignment function start)

    2. NC Power OFF and then ON.

    3. Grid Alignment :
    • Move the axes toward zero in REFERENCE mode.
    • The Y axis and V axis are stopped automatically and a misalignment between the grid will be written in NC parameter N8316 automatically.
    • At this time, the parameter N8302 bit 1 will become “0” and an alarm for power off request (No.000) occur.
    Note :
    • Machine without scale, the axis is stopped after travel 12mm, one revolution of motor.
    • Machine with scale, the axis is stopped after passing through the scale origin. Approx 10mm before machine zero.

    4. NC Power OFF and then ON again.

    5. Perform normal reference point return.
    Note :
    In case with scales, feed the axis by 30mm or more in opposite direction against the
    Zero in JOG mode, if not an NC alarm (No.90) will occur.

    6. Compare actual current values (%) of Y axis and V axis with the Y axis placed near the center of travel. On the servo adjustment screen.

    7. Calculation for synchronous :
    • V (%) – Y (%) multiply by 4. If the value obtained is plus(+). Subtract the value obtain from N8316.
    • V (%) – Y (%) multiply by 4. If the value obtained in minus(-). Add the value obtain to N8216.

    8. Check parameter N8302 bit 0 = “0”.
    Note :
    (If parameter N8316 manually corrected, N8302 bit 0 will automatically change to “0”.)

    9. Check parameter N1815 bit 0 = “0”.

    10. NC power OFF and ON.

    11. Perform reference point returns again.

    12. Compare actual current values of Y axis and V axis on the servo adjustment screen.
    • Manually (MPG or JOG), place Y axis near the center of travel. Confirm that Y/V axis is 50% or less, and the difference between Y/V axis is within 20%.

    13. If the value is out of above tolerance, repeat step above until it is fall within tolerance.

    14. After obtain the synchronous tolerance, perform normal zero point alignment.

    15. Write a simple program to confirm Y and V axes balance check.

    O000(x) ; program file
    G28 Y0 ;
    G90 G01 Y-750. F1000 ;
    G28 Y0 ;
    Y-50 ;
    Y-200 ;
    Y-350 ;
    Y-500 ;
    Y-650 ;
    Y-750 ;
    M30 ;

    (Record down the Y/V axes current value (%) if need as record data)


    -That’s All-
    AvicStuka

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    Default

    I'll post out how to check zero point alignment procedure after.
    If need urgently plz email me. I'll send a scan copy to you guys.
    Email : kokhow.chow@hs.utc.com

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    Default Thanks

    Thanks AvicStuka,
    Just what I was looking for. Not to much information out there for dual ballscrew machine setups.

    Thanks again

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