Re: [CAD_CAM_EDM_DRO] Re: Can CNCPro users provide some input? - cutter comp

Alan,

I am trying to follow your tracks a little here...

You went to the sourceforge (EMC) and selected the file entitled:
emc-1.1-19.i386-win32.zip. Is that right?

Where is the handbook you mentioned? Which file is it?

I started to download the zip file... There is no way I can get the whole
thing downloaded during the day. I use a free local server that only leaves
me on for about 30 min. at a time except after midnight. So, I can't afford
to download something big, unless I know it is exactly what I need. That is
why I am checking before I download it.

Thanks,

Tom Eldredge

----- Original Message -----
From: Alan Marconett KM6VV <KM6VV@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Wednesday, March 21, 2001 2:57 PM
Subject: [CAD_CAM_EDM_DRO] Re: Can CNCPro users provide some input? - cutter
comp


> Hi Ray,
>
> Eureka! Home at last! I finally got to a download site I could USE!
>
> http://sourceforge.net/projects/emc/
>
> FINALLY a .ZIP file I can handle! Lotsa 'C' code here! Thanks for
> these URL's. I didn't quite find the page (HTML?) on comp at:
>
> http://www.linuxcnc.org/handbook/index.html
>
> but I'll be downloading the handbook, and reading it from cover to
> cover.
>
> Ray wrote:
> >
> > Alan
> >
> > There is a page on LinuxCnc.org about the way the EMC does comp. Jon E
> > also has a page on his wusl site.
> >
> > There are several ways, including arcs, that you can approach the comp
> > offset. I did some experiments while writing the handbook comp page and
> > found that if you know the offset and the start of cut position in
advance
> > of the g42/43, or compute it some way, and use that info to move to the
> > start position, you can begin comp right where you want to cut. The
only
> > thing that the EMC cares about is that you not gouge the surface that
you
> > are comping away from during the approach. It computes a possible
> > gouge to some incredible degree of accuracy so the start position math
has
> > to be good.
> >
> > From: Alan Marconett KM6VV <KM6VV@...>
> >
> > <s>I've heard that the controller must have straight line enter and
exits,
> > >to give it time to switch into/out of comp. I really haven't much of
an
> > >Idea how it works, although I can see it simply as an offset in the
CAD.
> > >I'd like to hear/understand more about it.
> >
> > If you read a bit of c c++ you can look at the source code that Tom
Kramer
> > wrote for the emc. These routines are very well documented.
> >
> > Ray
>
>
> I write C, C++ for work (and my own efforts), and I have been anxious to
> study EMC, I just don't have Linux the experience, as yet! ;>)
>
> Thanks again for the URL's, I'd been to Source Forge (I thought) before,
> and EMC sites, but these are DEFINITELY good sources.
>
> Alan KM6VV
>
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