If you haven’t already it’s worth checking the white “housing” at the back of the build plate for rubbing against the linear bearing shafts. Mine makes contact in my S3 and makes noise at the top and bottom of the build plate travel.
I haven’t found a fix yet, the holes simply don’t align to the shafts.
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hdgrp 0
I also have the same problem, if you put your hand on the Z axis screw, you will find that the Z axis servo motor is working and causing the sound.
The problem was improved after I manually leveled it, but it was not completely resolved.
So I want to find the factory default Settings in the System Settings screen to see if I can solve this problem.
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