interpolation and algorithms of multiple axes was Re: Pulse Gen

I was wondering what your thoughts are on how the axis are phyisicaly
added. Many of us would want 4 axis. could we just keep adding
them as desired or would there be a max number supported. Are you
thinking stackable axis on header connectors or stand alone with
wiring between them.

I vote for stackable off of a motherboard with a power supply able to
power at least 6 axis. Transformer may be off board.

Axis we may need as follows.
1) X
2) Y
3) Z
4) rotary table
5) spindle
6) open

I also saw a post from phil saying he is getting the details from you
on this design. I hope the 2 of you collaborate and come up with a
compromise in design between using a micro and discrete chips.



Wally K.





--- In CAD_CAM_EDM_DRO@egroups.com, "Mariss Freimanis"
<geckohall@h...> wrote:

> Hi,
>
> What I would like to do is to take a look at what the goals are and
> to see if they are practical.
>
> The problem:
>
> It presently takes a fairly powerful computer to generate

relatively

> mediocre step pulse rates (<100 kHz for a 500 MHz Pentium). No one

I

> know complains their step frequencies are too high.
>
> The solution:
>
> Relieve the PC of the burden of having to generate step pulses
> directly with external hardware.
>
> What form the solution should take:
>
> 1) A common standard. For this to be effective it should be

an "open

> architecture". The hardware circuit and specifications must be non-
> proprietary. Anyone should be able to "roll their own" if they want
> to.
>
> 2) Very simple. The hardware only generates step pulses. Possibly
> general purpose I/O such as limit switches and fault inputs as well.
>
> 3) Modular. One pulse gen card per axis to keep cost down.
>
> 4) Low cost. Less than $5 to $10 per axis in parts.
>
> For my part I will post a complete circuit diagram of the pulse gen
> as a starting point. It generates 32,768 evenly spaced frequencies
> from 0 to 4 MHz. It has been tested and works perfectly. Anyone may
> build it and do with it as they please; I will retain no rights to
> the circuit.
>
> I will build a surface mount version, the pulse gen cards will be
> about 1.5" by 2" per axis, so 4 axies will fit in a 2" by 2" by 1"
> envelope.
>
> Comments and suggestions needed.
>
> Mariss