...or so my wife says.
I get a pretty good whine from my DIY CNC router, the dog definitely notices. The stepper motors are silent at stand still, but in motion whine proportional to the rpm. I understand increasing micro stepping is one way to help reduce audible noise.
Everything electrical came from overseas, so hobby grade components, definitely not commercial or industrial. (425oz 3.4mH 200rev motors, 36V PSU, 16mm ball screws on 4 axis gantry)
So with that in mind what level of micro stepping do you think I can run without losing steps?