Using surplus servo motors as spindle drive | |
Hello servo gurus - there has been some speculation within the "Mini-mill" forum about the use of surplus servo motors as spindle drive units, either belted or direct. Servos are designed with a very high energy density, and I think they'd work pretty nice. AC or DC servos in the 800 to 1400 W range would be ideal, with top speeds above 5,000 RPM. For simple use What would be some characteristis in a servo to look for, and how could the speed be varied?
Brushed DC would be easy... use a 10A DC speed control. How about AC? Perhaps a suitable VFD? Would an AC servo respond to such a unit?
The servos would ideally be wound for 90VDC or so. Any thoughts are appreciated. |