I have recently purchased a CNC with the following configuration:
2.2KW spindle.
DM860A controllers
KK01 interface board (from cnc4you.co.uk)
34Nema motors.

Jogging the machine across the x or y axis sounds sweet. No problems. When I run a programme though it does certain moves and the whole thing sounds terrible, I made a video:

Does that sound normal to you?

I must also say that if I speed it up it almost eliminates that vibration noise but then it runs at a feed rate that would break bits.