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Thread: FANUC 21i Serial Spindle RPM

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  1. 07-13-2011, 05:08 PM #1
    wahidbashir
    wahidbashir is offline Registered
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    FANUC 21i Serial Spindle RPM

    Frndz,
    I have a turning machine with FANUC 21i with serial spindle A06B-6112-H006.
    Its commanded speed and actual displayed speed always differ by 20%.
    measured speed is greater.
    Is there any way to calibrate it by using spindle parameters.
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  2. 07-13-2011, 05:46 PM #2
    underthetire
    underthetire is offline Gold Member
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    Are you even supposed to have A 21i control over there? Just askin...
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  3. 07-14-2011, 02:31 PM #3
    wahidbashir
    wahidbashir is offline Registered
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    Just supposed it may be 18iT. If u have any idea then write it
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  4. 07-14-2011, 03:31 PM #4
    Jim Green
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    Is the speed off by the same amount in reverse rotation?
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  5. 07-14-2011, 04:05 PM #5
    wahidbashir
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    Yes Dear,
    With same results.
    By the way what would you suggest if it is different on reverse
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  6. 09-23-2011, 05:59 PM #6
    Lewertek
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    Adjusting Fanuc 18/21 spindle speed

    I do not recall exactly which parameter, but it is related to either the maximum spindle speed ,(3741 or 3772) or maximum motor speed(4020) (I would try 4020 first), if I recall correctly. Record the original values before changing anything! You should be able to get it set within a few RPM of the programmed speed by trial and error.
    Hope this helps a few people out there.
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