Re: g18

[Dam <damg-at-1st.net>]

Ray,

I may be showing my age here but M30 used to be end of program / rewind tape.  The resetting of the parameters you mentioned at the end of a program
was standard practice. If you write enough programs for a specific machine and control setup those first few lines just become habit.  Those habits
that you develop also help avoid surprises and crashes when making parts using MDI rather than writing a program to just to mill a slot and drill a
couple of holes.

Dale

Ray wrote:

> Dave
>
> I think that there may be something to the suggestion by Dale.  The new
> interpreter document says concerning program end;
>
> -----snipped from linuxcnc.org/handbook/RS274NGC_3/RS274NGC_3TOC.html-----
> 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).
> -----end of snippet-----
>
> What you might try is setting the xz plane in the ini file right alongside
> the inch setting and then restarting the machine. (if you use inch)  See
> below.
>
> ; Startup codes for RS-274-NGC interpreter
> RS274NGC_STARTUP_CODE = G20 G18
>
> Some of these default actions at the end of a program run have bothered
> others as well.  I was kinda wondering if it might be possible to read these
> behaviors from ini settings but alas my C reading ability is meager to none.
>
> HTH
>
> Ray