Re: G92-program zero

["Joel Jacobs" <jj-at-netexp.net>]

Good morning Will,
O....kay.  I guess I should have RTFM.  I've been using a book called
Programming of Numerically Controlled Machines.  It didn't mention M2 and
M30 doing all that house cleaning.  I guess I thought all that was to be
done in the safety block at the beginning of the program.  So it seems it is
working as intended but not as I expected.
  There has to be a way to end a program without resetting G92 - otherwise
you couldn't make multiple parts by just changing the stock and re-running
the program. You say I can alternately end a program with '%'?  I'll give it
a shot tonight.

Thanks for the reply!

Joel


----- Original Message -----
From: "Will Shackleford" <shackle-at-cme.nist.gov>
To: "Multiple recipients of list" <emc-at-nist.gov>
Sent: Monday, June 04, 2001 8:47 AM
Subject: Re: G92-program zero


>
> Joel Jacobs wrote:
>
> > Could someone please explain to me how to stop a running program or even
> > re-run a program without trashing program zero?  I set program zero with
g92
> > before running the program.  If I abort the program or if the program
> > exicutes M30 (program end and rewind) my program zero gets trashed.
This is
> > really frustrating as I have to tear everything down and start over with
the
> > test indicator etc to find zero again.  Please help...
> >
> > Thanks
> > Joel
> >
> >
> >
> >
>
>
>  From the RS274NGC version 3 interpreter manual:
>
> -----------
>
>
> To end a program, program M2. To exchange pallet shuttles and then end a
program, program M30. Both of these commands have the following effects.
>
>     * 1. Axis offsets are set to zero (like G92.2) and origin offsets are
set to the default (like G54).
>     * 2. Selected plane is set to CANON_PLANE_XY (like G17).
>     * 3. Distance mode is set to MODE_ABSOLUTE (like G90).
>     * 4. Feed rate mode is set to UNITS_PER_MINUTE (like G94).
>     * 5. Feed and speed overrides are set to ON (like M48).
>     * 6. Cutter compensation is turned off (like G40).
>     * 7. The spindle is stopped (like M5).
>     * 8. The current motion mode is set to G_1 (like G1).
>     * 9. Coolant is turned off (like M9).
>
> No more lines of code in an RS274/NGC file will be executed after the M2
or M30 command is executed. Pressing cycle start will start the program back
at the beginning of the file.
>
>
> -----------
>
> End of manual paste.
>
>
>
> If you abort, the interpreter will still find the M2 at the end of a
> program and clear the offsets.
>
> Perhaps instead of the M2, use % at the beginning and end of the
> program. I think the old interpreter handled M2 differently.
>
>
>
> -- Will
>
>
>
> --
> ---------------------------------------------------------------
> William Penn Shackleford III shackle-at-nist.gov
> National Institute of Standards & Technology Tel: (301) 975-4286
> 100 Bureau Drive Stop 8230  FAX: (301) 990-9688
> Gaithersburg MD  20899  USA
> http://www.isd.mel.nist.gov/personnel/shackleford/
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>
>