Servo motor vipration and not stable

[Yasser2000]

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

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[cncmakers001]

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.

[Yasser2000]

Grounding is ok
Wich parameter
Can you tell me please

[Yasser2000]

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

[Yasser2000]

Please help

[zavateandu]

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

[Yasser2000]

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

I try but its same problem

[Bdrangdo]

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

[Yasser2000]

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

[Yasser2000]

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

What do you mean with . Backlash

[Yasser2000]

Please help

[Bdrangdo]

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.