interpolation and algorithms of multiple axes was Re: Pulse Gen

"PhilC" <phil@p...> wrote:

>
> ----- Original Message -----
> From: "Wally K" <cnc4me@u...>
> <snip>
>
> > What i think we need is something like Mariss's PulseGen circuit.
> > But we need to have Mariss work with one of you guys that are good
> > with micro code. I bet Mariss's basic idea with a micro and a few
> > chips would greatly simplify his design. If this was done as open
> > source then we could have upgrades and enhancments from multiple
> > parties. And it would be simple enough to make ourselfs.
>

Phil wrote;

> I would think that either a 20Mhz PIC (with its 200nS instruction

cycle) or

> a Dallas Semi high speed version of the 8051 would be able to do

linear and

> circular interpolation and pulse generation in software at a rate

of +50 khz

> per axis. But Mariss's pulse generator circuit would still be

potentially

> faster (hint: it is not limited to 4000 steps/sec)...

Thanks for the reply Phil. I do not think the external pulse circuit
has to do complicated things like circular interpolation. Why not
let the computer do that. Just have the external circuit generate
the stepper pulses.


Wally K.