Re: Stepper controllers

At 17:37 27/06/99 -0800, you wrote:

>From: John Grant <grantjoh@...>
>

<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< CUT >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

>Ian W
>
>All this talk of Pentiums and 486s bring up a question. The "Retrotec"
>controler uses a 8080 cpu and 64k of ram. Why do you need so much more
>to do what this early controll does?
>
>John Grant
>

Point taken -when I had cause to delve into the works of a large (circa 10
tons) Mori-Seki / Fanuc vertical machiing centre, I found the whole mess was
beingg run by a Z 80 CPU - truly ancient. I think though that this early
processor uses a different instruction set and register structure, which
just might be more suitable for this useage. The thing was 4 axis capable

Jim Gregg
W. Australia