Re: servos

Ian,

They would slow it down way to much (at least with standard opto-isolators).
I think it would be a better idea to isolate the digital PWM signal, and
carefully shield the encoder cabling. That will isolate the interface from
the 'power' side of things. I would also use an ISA IDE controller, either
set for a non-standard address or with one of the MB controllers disabled.

I am building a prototype controller inside a metal drive nest module. That
will allow me to get power and ide signals from the machine for the digital
side and provide fan cooling for the controller.

Dean

----- Original Message -----
From: Ian Wright <Ian@...>
To: <CAD_CAM_EDM_DRO@onelist.com>
Sent: Saturday, September 25, 1999 1:10 PM
Subject: Re: [CAD_CAM_EDM_DRO] servos


> From: "Ian Wright" <Ian@...>
>
> Hi Dean,
>
> I like this idea - the only reservation I would have is that it would come
> perilously close to the heart of the machine. Do you think it could be
> designed to incorporate opto isolators or would they slow it down too
much?
>
> Ian
> --
> Ian W. Wright
> Sheffield UK
>