Apply grease on the lead screw, click on the screen to control the z-axis to run up and down several times to check whether the abnormal noise is reduced.
The four fixing screws of the T-nut are loose, tighten the fixing screws to check whether the abnormal noise is reduced.
Refer to the document to disassemble the motor ：
Check whether the screw rod is bent. If it is not bent, clean the dust and re-install it. If the problem persists after installation, replace the screw rod and nut.
Please feed back the detailed investigation results to the after sales engineer.(Reply time :1 working day)
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