Originally Posted by JimmyJazz I'm not sure which part you don't understand in that tutorial, tex -- the geometry or the g-code -- but the geometry can be found in the Machinery's Handbook, if you have a copy of that laying around. It's an old practice to fake or approximate an ellipse by connecting 4 circular arcs, 2 long and 2 short. I was just reading that today, actually -- it's in the first section of the book, under the heading "Geometric Constructions." That's essentially all that this tutorial is doing, plus it seems to be dealing with some overhead related to the machine's very small memory footprint. |
Actually, the g-code looks kind of strange to me…I have some experience with HAAS CNC mill and lathe (as you do) and find this G-code unusual. I have also tried to backplot it, but it looks terrible…no ellipses, just circles.
I am aware that an ellipse could be approximated by two circles…however still can’t find a way to interpolate it in CATIA CNC modules.