@underdonesushi said in Motor idle noise ?:
The Aliexpress stepper motor wasn't attached to the printer, it was just set up on the table and it makes the noise.
What I found in my tests it makes a lot of difference if and how the motor is attached. So testing the stepper on the table and optimizing it there will probably lead to you having to do the same tuning again after mounting the motor. Basically every change in motor setup will have an influence e.g. on the weekend I change my Z motors from wired in series to wired in parallel and I had to find a new TOFF value to make them silent in idle again.
See Reducing Stand-Still Noise for a guide on how to tune this.