Re: [CAD_CAM_EDM_DRO] EMC interpreter was Re: BoBCad Question

Hi Art,

I have no idea how EMC is "buffering blocks". If the entire program was
in memory, I think one could save a list of pointers to the "labeled"
lines, "call" the line (saving a return pointer). For programs read
directly from disk (DMC?), one could save a pointer into the file,
rewind (random access), ... etc. Something like that? Lotta work!

I'd like to hear how EMC does it!

Alan KM6VV


Art Fenerty wrote:

>
> Alan:
>
> Yes I think your right, having never used subroutines, I assumed
> incorrectly that it was the same as a canned cycle.Bottom line is,
> emc cannot do subroutines in the same way, yet the EMC code seems to be
> sayng that a G-Code statement can start the process of buffering blocks of
> commands for later execution. This would be a subroutine. I'm gonna haveta
> take a closer look at the emc code again.
>
> Art
> ----- Original Message -----
> From: "Alan Marconett KM6VV" <KM6VV@...>
> To: <CAD_CAM_EDM_DRO@yahoogroups.com>
> Sent: Tuesday, May 08, 2001 12:23 PM
> Subject: Re: [CAD_CAM_EDM_DRO] EMC interpreter was Re: BoBCad Question
>
> > Hi Art,
> >
> > Isn't a canned cycle (G80-89...) part of the "controller" program? It
> > responds just like other words (G01, G03, etc.). I don't believe it is
> > loaded with the part program. A subroutine or subprogram WOULD be
> > loaded, from what I've read.
> >
> > Alan KM6VV
> >
> > Art Fenerty wrote:
> > >
> > > Thanks for all the responces. I agree, that the EMC interpreter is
> definetly
> > > not an amateur controller. It's code is very complex and can handle a
> great
> > > deal of advanced features. I would appreciate it if someone can tell me
> how
> > > to tell BobCad how to output standard Canned Cycles. I don't think EMC
> can
> > > handle subroutines due to the fact that the subroutines are contained at
> the
> > > end of the G-Code file. EMC is a top down translator, it must read the
> > > Canned Cycle first, store it, and then call the Cycle when it's
> required. Do
> > > I understand correctly, that a Canned Cycle is a subroutine by another
> name,
> > > or is a canned cycle limited in its application?
> > >
> > > Thanks,
> > > Art