Re: Why is the push to such high step rates (Grex and Arc100)?

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "lcdpublishing"
<lcdpublishing@...> wrote:

>
> Thanks for piping in Patrick.
>
> I can understand the desire for a smooth pulse stream and certainly
> can appreciate the effects of a bad pulse stream on steppers, but
> does that have any effect with servo driven systems?
>
> Also, do you know of any applications that would use such a high
> frequency for the pulse stream? I am obsessing about that
> specification - sorry.
>
> I just think about the industrial CNC machines I am familiar with
> (which also transcends into robotics). 4000 IPM at .0001"
> resolution is the fastest I have seen and that was on a FANUC ROBO
> Drill machine (basically a 3 axis machining center for drilling).
> At 4000 IPM and .0001" resolution, works out to about 660,000 SPS.
> It's just mind boggling to watch something move that fast.

Chris

I don't know of anything above 1MHZ but since designing/testing these
boards has been a 2 man-year project I am not about to play that
close. I prefer multiplying everything by 4 and not have to redo the
board when some new application comes along. The cost is absolutely
the same in terms of hardware for 1MHZ vs 4 MHZ and even higher.

Patrick Robin