On Sun, Dec 27, 2009 at 01:11:38PM -0800, Lawrence Glaister wrote:

> That looks quite useful Chris. The embedded examples show how easy
> several very useful operations are to hand code. Does it belong in
> gcode? good question.... If we had a good cam package to complement emc,
> then it would not be needed in the gcode interpreter. Do you know of
> something similar in other controls? 

Yes, my BOSS8 machine has a polar mode, but it is more limited
than what I propose.  For instance you can only specify integer
degrees.

It's not a machine control, but Autocad lets you specify vectors in
the format @distance<angle.  In Autocad it always means 'relative to
here' but in gcode it makes perfect sense to have 'relative to here'
G91 or 'relative to the origin' G90.

> or is this drifting a little far
> from the basic gcode spec? 

It's sure another drift from NGC but I do not see a way that it
breaks compatibility with old programs.

> Since I code a lot by hand, I would probably use it if it makes it into
> the releases.

I think I would use it too.  I would spend a little less time with
the calculator when working on round things.

> cheers

Thanks for your thoughts.


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