I am in the process of installing a Smoothieboard in my 3d printer. I just got the Z axis up and running and the stepper puts off a really high frequency LOUD sound when it is idle. When I move the axis up or down it is really quiet and smooth sounding, but when it comes to a stop it goes back to being really loud. I have the current setup correctly. What settings in the config could I tweak to get rid of this sound?
My old controller board I was using did not have nearly this much sound coming from idle steppers.