Quote Originally Posted by Ross77 View Post
Downside means that rapids are only 2500mm/min which seems a bit slow.
You say this is for small mill so probably 300mm max travel so at 2500mm/min thats 41.6mm in 1sec so 7.2s to cover full travel.!! Seems like you'll be going to lot of trouble and expensive with using servos when machine will probably spend 90% of time cutting at 75mm/min.?

Personally I'd go for 2.5mm or 3mm pitch 1:1 for the torque and resolution and use Lead shine closed loop steppers.! This will make a nice and very accurate machine plenty fast enough for SS.