I experience some noise when the bed moves. Sometimes it does it and sometimes it does not.
In order to identify the noise cause, I connected my laptop to a CR10 S5 to send the G code directly.
When I send G1 or G0 to move independently X or Y displacements the movements are very quiet.
When I send a G1 or G0 X Y, there is a loud noise while moving. Also, when doing a Home or auto-bed leveling.
What could it be?