Re: Re: My CNC Mill retrofit project

Andrew Werby wrote:

> [I was intending to keep as much intact as made sense- is it possible to
> keep both control systems alive at once?]

I actually did this in the early days of EMC, when there were a lot of bugs.
It took about 5-10 minutes to change things over. But, the servo amp
tuning really needed to be tuned specifically for each control. I found a
compromise during the time I had both hooked up, but it was a bit flakey.

> What about the feedback loop-
> how do I find the output from the encoders?

Well, first thing is to find out what is in use for position readout, shaft encoders,
linear encoders, resolvers or inductosyns. Could be any of the above.

> Does the EMC program require I
> use a STG board or the equivalent?

Pretty much at this point. At some time, other I/O boards will be supported,
but the STG is by far the most compact solution - everything except
auxilliary controls on the one board.

Jon