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

> As for resolution and precision, in machine tools, it's pretty hard
> to find anything with a resolution better than .0001" or .001MM.
> Beyond that is very impractical without taking some very special
> steps to insure the mechanicals can deal with any more resolution.
>

0.0001 inch = 0.0025mm
so 0.001mm = 0.000039 inch

The only thing you can really get with those resolutions is distance
between cuts or holes. I don't think there are many machines that
have drives that are that accuarate across the axis. Certainly not
our home brew stuff.

I can see high step counts on some devices that are using movement
like rotations, a telescope following a star ? no discernable step
motions, and not trying to stop and hold.

There is a HUGE ammount of uses beyond what we discuss.

Dave