I am interested in understanding the difference between position servo
drives and velocity/torque servo drives. I have a wasterjet here that needs
a replacement controller, and I need to know what I've got. Its a yaskawa
servopack 200v, p/n: sgda-08ap, it appears to be an AC drive, and is labeled
"position" as a type on a web page i found. another interesting thing is
that the encoders appear to be wired to the servopack... does this mean the
servopack is a servo amp taking step/direction pulses from the controlling
computer, or that its a ±10V input from the controlling computer, thanks in
advance, Dave L.