On Wed, 23 May 2012 06:45:22 -0500, you wrote:

>Good point, are there any two controls from different manufacturers that 
>are completely portable between each other?

Unfortunately not in my experience.

>I know from reading my CNC g code manuals from other machines that I 
>have that even generation to generation of the same controller the g 
>code is not portable.

Fanuc <G>

>So the question is do you cobble up your software just to be portable 
>when no one else seems to do this...
>
>Just open up the list of post processors on most cam software and you 
>see hundreds of choices usually...

There's hundreds in my copy of FeatureCam. It's a PITA. I do some Gcode
optimisation for a few engineering companies that farm some of their
work out and getting the right post processor that works is problematic
and it's often the small things that catch you out.

As Stuart says the integrator often changes things too, so you can't
even rely on a stock post processor :(

However, both LinuxCNC and Mach used the same base for their code and
the radically different behaviour of not stipulating the H value on a
G43 can be disastrous as I know from bitter experience.

LinuxCNC - not using the H value loads the offset for the current tool.
Mach3 - not using the H value sets the tool offset to zero !

The Fanuc style where the H value must be stipulated is much safer.

Steve Blackmore
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