Re: Dedicated mb for PID

Brian, all those cards you see with the DSP on board are using the
DSP to run the PID loop. A DSP is a special processor designed for
number crunching. Doug proposed to use an old dedicated PC for this
part, so all he needs is the interface circuitry.

I don't even think a dedicated PC would be required. A fast mother
board could easily implement PID loops for several axis with
acceptable update rates. The code could be run in a high priority
thread of a hard real time environment. Just don't try it under
Windows, although Windows NT does have real time support, the
interrupt latency is still pathetic.

~petev

--- In CAD_CAM_EDM_DRO@y..., Brian Pitt <bfp@e...> wrote:
> how about a DSP chip for this
> I dont know a whole lot about them but every time I do a search
> on motion control or servo motor drivers I end up with a bunch of
> hits for DSP applications in this area
> might be worth a look anyway
>
> Brian