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IndustryArena Forum > Machine Controllers Software and Solutions > Fanuc > How to bypass Linear scale in Fanuc Oi-MF controller
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  1. #1
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    Feb 2019
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    2

    How to bypass Linear scale in Fanuc Oi-MF controller

    Hi! All,
    I have one drill tap center with Fanuc Oi-MF. All three axis have linear scale and one failed in Y axis.

    I tried to bypass it through 1815#opt but got alarm of SV411 which I avoid by adjust the 1829 parameter.

    Now repeatability is effecting by 15/20 microns.
    Can you please suggest that what I missed ? or what next I need to do?
    Thanks in advance
    Last edited by joyunipol; 03-08-2019 at 06:30 AM.

  2. #2
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    Dec 2009
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    763

    Re: How to bypass Linear scale in Fanuc Oi-MF controller

    now ,by that 15/20 microns you have the backlash on the ball screw or ballscrew bearings,this backlash was dicovered by your linear scale and if you are bypassing it now ,you use the motor encoder to position and the difference between what encoder see and where the axis is in real time result in a backlash.
    i should start by checking the axial movement of the ballscrew on the ends of it and release and tight again the nut on the end bearings of the ballscrew (opposite to motor side )and check again with a dial if it is still there the 15.20 microns.
    you can also adjust this backlash in parameter 1851 for every axis

  3. #3
    Junior Member
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    Feb 2019
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    which Axis alarm sv410? This axis is a little move to alarm or move a distance and then alarm?

  4. #4
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    Feb 2019
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    Hi!
    Thanks for your time. there is no backlash and runs fine in 0 rapid. but at 25% rapid, y axis moves a little and it stops with a sudden breaks and SV0411 generates.

    On homing it changes its offset value by 15/20 micron which can't be adjusted in rapid backlash parameter. Local fanuc engineer also clueless.....any idea?

  5. #5
    Registered
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    Dec 2009
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    763

    Re: How to bypass Linear scale in Fanuc Oi-MF controller

    check very good the power connection wires from the motor and from drive

  6. #6
    Member
    Join Date
    Jun 2022
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    6

    Re: How to bypass Linear scale in Fanuc Oi-MF controller

    Can you please suggest that what I missed chinese buffets near me

    or what next I need to do?
    Thanks in advance

  7. #7
    Banned
    Join Date
    Dec 2021
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    32

    Re: How to bypass Linear scale in Fanuc Oi-MF controller

    We produce DRO and linear scale, maybe it will help you, you can go to https://www.amazon.com/stores/HHXXOV...2?ref_=ast_bln
    view on
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