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IndustryArena Forum > Machine Controllers Software and Solutions > Fanuc > Servo motor vipration and not stable
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  1. #1

    Join Date
    Jan 2020
    Posts
    23

    Servo motor vipration and not stable

    Machine Colchester1100
    Fanuc
    Machine reafrance and not give any error
    But the x axis after stop reafrance
    Give me vipration and not stable . It try to move left and right and not stable
    I change the servo implifire but still same error
    I clean the encoder .clean the liner roller
    Change the encoder cabl
    Its same error
    Please help

  2. #2

    Re: Servo motor vipration and not stable

    Quote Originally Posted by Yasser2000 View Post
    Machine Colchester1100
    Fanuc
    Machine reafrance and not give any error
    But the x axis after stop reafrance
    Give me vipration and not stable . It try to move left and right and not stable
    I change the servo implifire but still same error
    I clean the encoder .clean the liner roller
    Change the encoder cabl
    Its same error
    Please help
    You can check motor grounding or the parameter setting on the driver.
    http://cncmakers.com/cnc/controllers/CNC_Controller_System/CNC_Retrofit_Package.html

  3. #3

    Join Date
    Jan 2020
    Posts
    23

    Re: Servo motor vipration and not stable

    Grounding is ok
    Wich parameter
    Can you tell me please

  4. #4

    Join Date
    Jan 2020
    Posts
    23

    Re: Servo motor vipration and not stable

    I change parameter 1825 . Its x motor gain loop change it from 3000 to 2000
    The vipration is small down . But still same problem
    The 3 coil of motor is ok by ohm
    Do you think motor problem
    Please help

  5. #5

    Join Date
    Jan 2020
    Posts
    23

    Re: Servo motor vipration and not stable

    Please help

  6. #6
    Registered
    Join Date
    Dec 2009
    Posts
    669

    Re: Servo motor vipration and not stable

    look for Load Inertia paramenter LDNIT and try to decrease the value

  7. #7

    Join Date
    Jan 2020
    Posts
    23
    Quote Originally Posted by zavateandu View Post
    look for Load Inertia paramenter LDNIT and try to decrease the value
    I try but its same problem

  8. #8
    Registered
    Join Date
    Apr 2015
    Posts
    169

    Re: Servo motor vipration and not stable

    Check for worn ball screw or bearings, backlash can cause servo motor to hunt or vibrate.

  9. #9

    Join Date
    Jan 2020
    Posts
    23
    Quote Originally Posted by Bdrangdo View Post
    Check for worn ball screw or bearings, backlash can cause servo motor to hunt or vibrate.
    We allready find the 2 bearings of ball screw up side
    Is damage. And then motor become over heat and over loud
    Then we change that 2 bearings
    But motor still same problem
    Vibrating and not stable. After stop . It try to move small movie left and right
    Please advise

  10. #10

    Join Date
    Jan 2020
    Posts
    23
    Quote Originally Posted by Bdrangdo View Post
    Check for worn ball screw or bearings, backlash can cause servo motor to hunt or vibrate.
    What do you mean with . Backlash

  11. #11

    Join Date
    Jan 2020
    Posts
    23

    Re: Servo motor vipration and not stable

    Please help

  12. #12
    Registered
    Join Date
    Apr 2015
    Posts
    169

    Re: Servo motor vipration and not stable

    Quote Originally Posted by Yasser2000 View Post
    Please help
    Backlash is term used to describe excessive clearances caused by worn bearings or ball screws and nuts. When the backlash becomes too great it can cause the servo to vibrate and shake. You can easily feel this by turning it by hand. Also you said the motor had heated up, check to see if the windings have not shorted.

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