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IndustryArena Forum > Machine Controllers Software and Solutions > Fanuc > Fanuc 21iT Aggressive Spindle Drive?
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  1. #1
    Member
    Join Date
    Jan 2021
    Posts
    1

    Fanuc 21iT Aggressive Spindle Drive?

    I recently purchased a Clausing Colchester CNC lathe with a 21iT control.

    When the spindle starts or changes speeds it is very aggressive, Pulls 160+ amps.
    Dims the lights and will fault out frequently

    Machine is rated for Max 100amps and the wiring was sized for 175amps

    Spindle drive motor has been checked and is within spec.

    I have talked to Clausing and they have never adjusted Fanuc spindle drive parameters on any lathe.

    Don't misunderstand me, Clausing Industrial CNC service guys in Kalamazoo MI are the best and have helped me over the years more than I deserve.

    Fanuc says they need to come out$$$$$$$$$$$$$$$$$$$
    I don't mind paying but Fanuc tech wants a blank check

    There must be some parameters that control the spindle max amp/load/ramp up?

    Have no idea if someone has altered the parameters?

    This is a nice machine and have a lot of time and money invested trying to fix this one issue.

    Any thoughts or who I can contact?

    Thanks

  2. #2
    Registered
    Join Date
    Apr 2011
    Posts
    738

    Re: Fanuc 21iT Aggressive Spindle Drive?

    ACCEL/DECEL time is too short?
    Check the setting of parameter 4082, set in milli-seconds.

  3. #3
    Registered
    Join Date
    Oct 2009
    Posts
    291

    Re: Fanuc 21iT Aggressive Spindle Drive?

    Quote Originally Posted by Lethal View Post
    I recently purchased a Clausing Colchester CNC lathe with a 21iT control.

    When the spindle starts or changes speeds it is very aggressive, Pulls 160+ amps.
    Dims the lights and will fault out frequently

    Machine is rated for Max 100amps and the wiring was sized for 175amps

    Spindle drive motor has been checked and is within spec.

    I have talked to Clausing and they have never adjusted Fanuc spindle drive parameters on any lathe.

    Don't misunderstand me, Clausing Industrial CNC service guys in Kalamazoo MI are the best and have helped me over the years more than I deserve.

    Fanuc says they need to come out$$$$$$$$$$$$$$$$$$$
    I don't mind paying but Fanuc tech wants a blank check

    There must be some parameters that control the spindle max amp/load/ramp up?

    Have no idea if someone has altered the parameters?

    This is a nice machine and have a lot of time and money invested trying to fix this one issue.

    Any thoughts or who I can contact?

    Thanks
    Do you know the spindle amplifier part number ?
    What alarm are you getting?
    regards

    AlexFanuc

  4. #4
    Member
    Join Date
    May 2016
    Posts
    500

    Re: Fanuc 21iT Aggressive Spindle Drive?

    What model of Clausing is it ?

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