Re: Re: Old CNC controls

Jon,
You should have said "go look at my web site," which should prove inspiring
to anyone contemplating this conversion.
http://ascc.artsci.wustl.edu/~jmelson/Machining.html

in your posting, you said:

I built my own PWM servo amps, since I didn't know where to get them
surplus at the time. It was a great education in control systems theory

Since i barely need more education in control theory, do you know where to
get servo amps surplus now? I'm looking for 100V 5-10 amps...

You also wrote:
These amps are fed velocity commands as +/- 10 V signals from the
servo-to-go card.
What method did you use to generate the pwm? Standard ramp /comparator
thing?

Thanks, eric