RE: Why can't I re-run this program?

Hi Jon, Ray, Tim et. al.,

That's what I figured (after I searched a considerable time trying to
find subroutines). Is it because the Gcode is pre-compiled, or because
of the "contouring" (?) process that smoothes the flow of the blocks?

I'm also curious about the G98/G99 "canned cycle return level", is that
widely used? I understand that canned cycles can vary a lot.

Alan KM6VV


Jon Elson wrote:

>
> Alan Marconett KM6VV wrote:
>
> > Hi Ray, Tim,
> >
> > I've been studying the recent posts on stopping, I.E. M02 & M30, and
> > also reading CNCpro's, and FlashCut's doc's. I under stand that there
> > are variations in Gcode!
> >
> > I found SUBROUTINE CALLS in Flashcut (M98 Pmysub, M30, Omysub ... M99),
> > and in CNCpro (G22 P20, M30, $20 ... M2). But I can't seem to find a
> > sub in "NIST274/NGC Interpreter Version 3". I do know that G98 and G99
> > are used in NGC for "canned cycle return level" (G98 vs. M98, already
> > made THAT mistake). Does NGC support subroutines? or "subPROGRAMS"?
>
> EMC does not now have subroutines. This is a major drawback for those
> writing code by hand. I think there has been a TCL hack that makes the
> GUI trick the system into doing subroutines.
>
> >
> > I see M02 ending a part program, OR doing a RETURN from a subroutine
> > (depending on which controller software you look at).
> >
> > I was hoping to find a common denominator (majority vote) for doing
> > subroutines. ;>)
> >
> > A common method of doing variables would also be nice!
>
> If it wasn't part of the RS-274D spec, then every control manufacturer
> was left to figure out a syntax on his own.
>
> Jon