Re: [CAD_CAM_EDM_DRO] Re: EMC Help ,.. Urgent!

Matt Shaver wrote:

> Keith Rumley wrote:
>
> > Paul, Frank, Jon, etc,
> >
> > I tried running a 132,000+ line test program to check the limit out (in 1
> > increments, one x or y move per line) EMC stops at line#s >99,999. Looking
> > in /src/rs274ngc/ and /src/rs274ngc_new/ that number is hard coded in.
>
> I'd be willing to bet that in some old moldy specification somewhere,
> like RS274-D or RS274NGC, it says that line numbers can only go up to
> 99999. As I understand it, Tom Kramer was quite careful to implement in
> the interpreter every feature of the specs he was given, as written, no
> matter whether it was a good idea or not.

No, the RS-274D spec is pretty flexible. There is a 'format classification'
that can be at the beginning of a program, I gather, that can define the
limits of what the machine control is supposed to expect to see in the
program. (I've never seen this used in NC machine tools, although it
is common in Gerber photoplotting and Excellon PCB drill programs.)

He was working from an Allen-Bradley document, and copied a lot
of things from them without going back to the RS-274D spec to see
if it was an extension, restriction or faithful implementation of RS-274D.
This was good for me, as I started with an AB 7320 control, and the
transition was a little easier for me that way.

Jon