Quote Originally Posted by Jeff View Post
Yeah that was where I was going wrong :). The 4Nm motors from cnc4you will give me cutting speeds of around 3000 mm/min and rapids around 10000 mm/min (which is as high as I can go due to the critical speed of the ballscrew), on a 48v supply with a 3x margin. 68V is way above the ideal voltage for these motors (3.0mH inductance) so I think I'll stick with 48V rather than turn my motors into workshop heaters :)

I'll probably get the CWD556 DSP drivers from there too.
Jeff It is the norm to use 68V with the motors from cn4you 3.1Nm you won't have any trouble with them. You will stiffen the machine with only 48V. Your choice though>