New mill, which motors?

[Robin Hewitt]

Good question, no good answer, I don't know what I want...

High speed may be preferable to high power?
Cool running is nice.
A sexy power against speed graph that doesn't fall of a cliff could get my juices flowing.
Something that doesn't come in sets of 3 is handy because X and Z can be very different.
I do know it will drive a 4mm ball screw using timing pulleys, I have a thing about XL pulleys

[JAZZCNC]

Good question, no good answer, I don't know what I want...

High speed may be preferable to high power?
Cool running is nice.
A sexy power against speed graph that doesn't fall of a cliff could get my juices flowing.
Something that doesn't come in sets of 3 is handy because X and Z can be very different.
I do know it will drive a 4mm ball screw using timing pulleys, I have a thing about XL pulleys

Robin modern Digital drives are completely different animals to old Analog drives, they are light years better and run motors much cooler with much much smoother operation.
The minute the motor spins you'll understand what I mean because they sound very different as well, much quieter. And with the newer closed-loop, esp the 3 phase motors, they have taken another, if slightly smaller leap forward.

You'll find with the new breed of steppers/drives you get higher rpm's and they carry the torque higher up the curve. Also. with most of the drives allowing AC connections, you don't have to mess around building DC PSU, just hook them up to a transformer, and away you go.