On Friday 01 November 2013 23:48:56 Jon Elson did opine:
> andy pugh wrote:
> > On 1 November 2013 16:36, Jon Elson <el...@pico-systems.com> wrote:
> >> You could actually create the engraving in XY, and then write a
> >> simple converter
> >> program (maybe even just text substitution in a text editor) to
> >> change all Y's
> >> to A's.
> >
> > Only if the G-code didn't contain any arcs, though.
>
> OHhhh, yeah, good point!
Seems to me that caveat would depend on the working backlash in the table.
With my el-cheapo, the numerals most certainly would have a minimum
"readable" size. A table based on a harmonic drive would, on the face of
it, probably work pretty good even for characters .025" tall.
However, if LCNC cannot do arcs where the A might be part of it, and IIRC
its choices are XY,YZ,XZ now, then one of two things.
1. Define some new planes
2. shut down the driver psu and plug the A tables motor into the X driver
for the duration so LCNC isn't even aware we are playing tricks with it.
That would no doubt take a different X scale in the .ini, but should work
using my original idea of a 360mm move is exactly one turn of the table.
Since defining the new planes might add some new tricks to LinuxCNC that
the "other" guys can't do, I'd be in favor of that as opposed to switching
motor cables around every time something like this came up.
Of course I've not a clue how much coding gingerbread that might wind up
being. But its at least a thought... :)
Cheers, Gene
--
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