Re: Re: EMC and lead screw compensation

Ray,

Good to know I wasn't the only one sweatin' my answers to Wally :-)

Wally,

The documentation for the leadscrew comp is not precise enough (yet)
to give you definitive answers. Only a look at the code (which I have
not yet done; and it appears that Ray has not yet either) or a talk
with Fred (as suggested) will do this. Someone on the list MAY have
looked into this...

I'll repeat that "usually" it is evenly spaced increments which the
control interpolates for "other than" locations.

I don't agree with Ray that the first column means NIST will
allow "bunching together" the comp... To me it just means they don't
know the travel size(s) you may use. But I may be wrong! Or may have
misinterpreted Ray!

Ray wrote:

>They say there are times when one should keep ones mouth shut. --
>like when swatting flies on the ceiling. This might be one of those
>times.

>Again a guess. If they had specified a distance they would not have
>included the first leadscrew comp column the way it is. Rather they
>would have given it as first step, second, ...

>I've worked with a few Mazak leadscrew comp files. These appear to
>be equal interval and have few very small entries.
>Ray

The whole NIST EMC project "team" surprises me from time to time.
Sometimes, they seem to know just about everything there is to know
about some aspect of CNC in the "real world". Other times,
real "Ivory tower" like. Not a clue. But GOOD listeners! I say this
to preface what I'm going to conclude with:

The EMC project is only as good as the input from the "real world".
If the team is getting input from the same 20 people, then 25 people
are going to "define" EMC.

But if 800 people, I mean if 800 people walked in, sat dowm, and
hummed a few bars... Then it would be a movement... :-)

And that's what it can be. The Next Generation Control (NGC) CNC EMC
movement. Be heard. Let's make this EMC thing the best it can be...

Hope this helps.

Ballendo