Originally Posted by
joeavaerage
Hi
dazp1976 has a 1.8kW AC servo, I think Lichuan brand, that was very well priced. A few years ago I bought a second hand 1.8kW Allen Bradley AC servo and drive for $600US
for the pair. I still had to find/buy/make the cables and I paid for the set-up and tuning software, but it has made an excellent spindle motor.
I mostly use it in velocity mode, that is the controller provides a 0-10V PWM signal and the servo responds from 0rpm to 3500rpm, its rated speed. Because the velocity loop is closed
Depending on where you are you may find a good servo and drive somewhere for cheap...grab it, you won't be disappointed, they make excellent spindle motors.
Craig