well, I am comfortable with matrix algebra, but it's probably easier,
more practical, to just do that part in freecad or so, and use a
separate g code file for that.
I was just wondering what these different coordinate systems are, what
they are used for.
On 9/11/20 9:26 AM, dave engvall wrote:
IIRC some controls have a switch to do this. Also I think you can
flip the sign of one axis and get a mirror image but the sense of the
cut (climb/conventional) also flips so unless your machine is pretty
tight dimensions may also shift. I've always done this the hard way by
going back to the CAM. My brain is pretty well fried but I think a bit
of matrix algebra would do this for you.
Dave
On 9/11/20 6:43 AM, R C wrote:
Hello Andy,
That is interesting, I should learn more about these coordinate
systems. From a math/geometry perspective there nothing that could
keep you from
translating, rotating (and even more weird transformations) a
geometry into a custom one. However in an implementation, of course,
you'd have to have a spot somewhere between the definition of an
object (g code if you will) and where the machine/tool actually
moves. In some, not CC related, simulations, that's actually done/used.
there probably is a list of what these coordinatesystems actually do?
(Now I am wondering, if I make a part, is there a coordinate system,
that would turn out the mirror image that part?)
Ron
On 9/11/20 1:54 AM, andy pugh wrote:
On Fri, 11 Sep 2020 at 05:22, R C <cjv...@gmail.com> wrote:
It sounds like the coordinate systems in essence are the same, they
just have a different origin, for all the other parts, it's just the
same thing, just translated and/or rotated for another part?
Yes, and there is also only rotation about the axis supported.
(I did just find myself wondering if you could put a set of direction
cosines in UVW but then decided that there probably isn't much call
for that.)
http://linuxcnc.org/docs/2.8/html/gcode/coordinates.html
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